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vim/src/vim9compile.c
Bram Moolenaar 6977dba04b patch 8.2.3106: Vim9: confusing line number reported for error 
Problem:    Vim9: confusing line number reported for error.
Solution:   Use the start line number for the store instruction.
            (closes #8488)
2021-07-04 22:48:12 +02:00

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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* vim9compile.c: :def and dealing with instructions
*/
#define USING_FLOAT_STUFF
#include "vim.h"
#if defined(FEAT_EVAL) || defined(PROTO)
#ifdef VMS
# include <float.h>
#endif
#define DEFINE_VIM9_GLOBALS
#include "vim9.h"
// values for ctx_skip
typedef enum {
SKIP_NOT, // condition is a constant, produce code
SKIP_YES, // condition is a constant, do NOT produce code
SKIP_UNKNOWN // condition is not a constant, produce code
} skip_T;
/*
* Chain of jump instructions where the end label needs to be set.
*/
typedef struct endlabel_S endlabel_T;
struct endlabel_S {
endlabel_T *el_next; // chain end_label locations
int el_end_label; // instruction idx where to set end
};
/*
* info specific for the scope of :if / elseif / else
*/
typedef struct {
int is_seen_else;
int is_seen_skip_not; // a block was unconditionally executed
int is_had_return; // every block ends in :return
int is_if_label; // instruction idx at IF or ELSEIF
endlabel_T *is_end_label; // instructions to set end label
} ifscope_T;
/*
* info specific for the scope of :while
*/
typedef struct {
int ws_top_label; // instruction idx at WHILE
endlabel_T *ws_end_label; // instructions to set end
} whilescope_T;
/*
* info specific for the scope of :for
*/
typedef struct {
int fs_top_label; // instruction idx at FOR
endlabel_T *fs_end_label; // break instructions
} forscope_T;
/*
* info specific for the scope of :try
*/
typedef struct {
int ts_try_label; // instruction idx at TRY
endlabel_T *ts_end_label; // jump to :finally or :endtry
int ts_catch_label; // instruction idx of last CATCH
int ts_caught_all; // "catch" without argument encountered
} tryscope_T;
typedef enum {
NO_SCOPE,
IF_SCOPE,
WHILE_SCOPE,
FOR_SCOPE,
TRY_SCOPE,
BLOCK_SCOPE
} scopetype_T;
/*
* Info for one scope, pointed to by "ctx_scope".
*/
typedef struct scope_S scope_T;
struct scope_S {
scope_T *se_outer; // scope containing this one
scopetype_T se_type;
int se_local_count; // ctx_locals.ga_len before scope
skip_T se_skip_save; // ctx_skip before the block
union {
ifscope_T se_if;
whilescope_T se_while;
forscope_T se_for;
tryscope_T se_try;
} se_u;
};
/*
* Entry for "ctx_locals". Used for arguments and local variables.
*/
typedef struct {
char_u *lv_name;
type_T *lv_type;
int lv_idx; // index of the variable on the stack
int lv_from_outer; // nesting level, using ctx_outer scope
int lv_const; // when TRUE cannot be assigned to
int lv_arg; // when TRUE this is an argument
} lvar_T;
// Destination for an assignment or ":unlet" with an index.
typedef enum {
dest_local,
dest_option,
dest_env,
dest_global,
dest_buffer,
dest_window,
dest_tab,
dest_vimvar,
dest_script,
dest_reg,
dest_expr,
} assign_dest_T;
// Used by compile_lhs() to store information about the LHS of an assignment
// and one argument of ":unlet" with an index.
typedef struct {
assign_dest_T lhs_dest; // type of destination
char_u *lhs_name; // allocated name excluding the last
// "[expr]" or ".name".
size_t lhs_varlen; // length of the variable without
// "[expr]" or ".name"
char_u *lhs_whole; // allocated name including the last
// "[expr]" or ".name" for :redir
size_t lhs_varlen_total; // length of the variable including
// any "[expr]" or ".name"
char_u *lhs_dest_end; // end of the destination, including
// "[expr]" or ".name".
int lhs_has_index; // has "[expr]" or ".name"
int lhs_new_local; // create new local variable
int lhs_opt_flags; // for when destination is an option
int lhs_vimvaridx; // for when destination is a v:var
lvar_T lhs_local_lvar; // used for existing local destination
lvar_T lhs_arg_lvar; // used for argument destination
lvar_T *lhs_lvar; // points to destination lvar
int lhs_scriptvar_sid;
int lhs_scriptvar_idx;
int lhs_has_type; // type was specified
type_T *lhs_type;
type_T *lhs_member_type;
int lhs_append; // used by ISN_REDIREND
} lhs_T;
/*
* Context for compiling lines of Vim script.
* Stores info about the local variables and condition stack.
*/
struct cctx_S {
ufunc_T *ctx_ufunc; // current function
int ctx_lnum; // line number in current function
char_u *ctx_line_start; // start of current line or NULL
garray_T ctx_instr; // generated instructions
int ctx_prev_lnum; // line number below previous command, for
// debugging
compiletype_T ctx_compile_type;
garray_T ctx_locals; // currently visible local variables
int ctx_has_closure; // set to one if a closures was created in
// the function
garray_T ctx_imports; // imported items
skip_T ctx_skip;
scope_T *ctx_scope; // current scope, NULL at toplevel
int ctx_had_return; // last seen statement was "return"
cctx_T *ctx_outer; // outer scope for lambda or nested
// function
int ctx_outer_used; // var in ctx_outer was used
garray_T ctx_type_stack; // type of each item on the stack
garray_T *ctx_type_list; // list of pointers to allocated types
int ctx_has_cmdmod; // ISN_CMDMOD was generated
lhs_T ctx_redir_lhs; // LHS for ":redir => var", valid when
// lhs_name is not NULL
};
static void delete_def_function_contents(dfunc_T *dfunc, int mark_deleted);
/*
* Lookup variable "name" in the local scope and return it in "lvar".
* "lvar->lv_from_outer" is incremented accordingly.
* If "lvar" is NULL only check if the variable can be found.
* Return FAIL if not found.
*/
static int
lookup_local(char_u *name, size_t len, lvar_T *lvar, cctx_T *cctx)
{
int idx;
lvar_T *lvp;
if (len == 0)
return FAIL;
// Find local in current function scope.
for (idx = 0; idx < cctx->ctx_locals.ga_len; ++idx)
{
lvp = ((lvar_T *)cctx->ctx_locals.ga_data) + idx;
if (STRNCMP(name, lvp->lv_name, len) == 0
&& STRLEN(lvp->lv_name) == len)
{
if (lvar != NULL)
{
*lvar = *lvp;
lvar->lv_from_outer = 0;
}
return OK;
}
}
// Find local in outer function scope.
if (cctx->ctx_outer != NULL)
{
if (lookup_local(name, len, lvar, cctx->ctx_outer) == OK)
{
if (lvar != NULL)
{
cctx->ctx_outer_used = TRUE;
++lvar->lv_from_outer;
}
return OK;
}
}
return FAIL;
}
/*
* Lookup an argument in the current function and an enclosing function.
* Returns the argument index in "idxp"
* Returns the argument type in "type"
* Sets "gen_load_outer" to TRUE if found in outer scope.
* Returns OK when found, FAIL otherwise.
*/
static int
arg_exists(
char_u *name,
size_t len,
int *idxp,
type_T **type,
int *gen_load_outer,
cctx_T *cctx)
{
int idx;
char_u *va_name;
if (len == 0)
return FAIL;
for (idx = 0; idx < cctx->ctx_ufunc->uf_args_visible; ++idx)
{
char_u *arg = FUNCARG(cctx->ctx_ufunc, idx);
if (STRNCMP(name, arg, len) == 0 && arg[len] == NUL)
{
if (idxp != NULL)
{
// Arguments are located above the frame pointer. One further
// if there is a vararg argument
*idxp = idx - (cctx->ctx_ufunc->uf_args.ga_len
+ STACK_FRAME_SIZE)
+ (cctx->ctx_ufunc->uf_va_name != NULL ? -1 : 0);
if (cctx->ctx_ufunc->uf_arg_types != NULL)
*type = cctx->ctx_ufunc->uf_arg_types[idx];
else
*type = &t_any;
}
return OK;
}
}
va_name = cctx->ctx_ufunc->uf_va_name;
if (va_name != NULL
&& STRNCMP(name, va_name, len) == 0 && va_name[len] == NUL)
{
if (idxp != NULL)
{
// varargs is always the last argument
*idxp = -STACK_FRAME_SIZE - 1;
*type = cctx->ctx_ufunc->uf_va_type;
}
return OK;
}
if (cctx->ctx_outer != NULL)
{
// Lookup the name for an argument of the outer function.
if (arg_exists(name, len, idxp, type, gen_load_outer, cctx->ctx_outer)
== OK)
{
if (gen_load_outer != NULL)
++*gen_load_outer;
return OK;
}
}
return FAIL;
}
/*
* Lookup a script-local variable in the current script, possibly defined in a
* block that contains the function "cctx->ctx_ufunc".
* "cctx" is NULL at the script level.
* If "len" is <= 0 "name" must be NUL terminated.
* Return NULL when not found.
*/
static sallvar_T *
find_script_var(char_u *name, size_t len, cctx_T *cctx)
{
scriptitem_T *si = SCRIPT_ITEM(current_sctx.sc_sid);
hashitem_T *hi;
int cc;
sallvar_T *sav;
ufunc_T *ufunc;
// Find the list of all script variables with the right name.
if (len > 0)
{
cc = name[len];
name[len] = NUL;
}
hi = hash_find(&si->sn_all_vars.dv_hashtab, name);
if (len > 0)
name[len] = cc;
if (HASHITEM_EMPTY(hi))
return NULL;
sav = HI2SAV(hi);
if (sav->sav_block_id == 0 || cctx == NULL)
// variable defined in the script scope or not in a function.
return sav;
// Go over the variables with this name and find one that was visible
// from the function.
ufunc = cctx->ctx_ufunc;
while (sav != NULL)
{
int idx;
// Go over the blocks that this function was defined in. If the
// variable block ID matches it was visible to the function.
for (idx = 0; idx < ufunc->uf_block_depth; ++idx)
if (ufunc->uf_block_ids[idx] == sav->sav_block_id)
return sav;
sav = sav->sav_next;
}
return NULL;
}
/*
* Return TRUE if the script context is Vim9 script.
*/
static int
script_is_vim9()
{
return SCRIPT_ITEM(current_sctx.sc_sid)->sn_version == SCRIPT_VERSION_VIM9;
}
/*
* Lookup a variable (without s: prefix) in the current script.
* "cctx" is NULL at the script level.
* Returns OK or FAIL.
*/
static int
script_var_exists(char_u *name, size_t len, cctx_T *cctx)
{
if (current_sctx.sc_sid <= 0)
return FAIL;
if (script_is_vim9())
{
// Check script variables that were visible where the function was
// defined.
if (find_script_var(name, len, cctx) != NULL)
return OK;
}
else
{
hashtab_T *ht = &SCRIPT_VARS(current_sctx.sc_sid);
dictitem_T *di;
int cc;
// Check script variables that are currently visible
cc = name[len];
name[len] = NUL;
di = find_var_in_ht(ht, 0, name, TRUE);
name[len] = cc;
if (di != NULL)
return OK;
}
return FAIL;
}
/*
* Return TRUE if "name" is a local variable, argument, script variable or
* imported.
*/
static int
variable_exists(char_u *name, size_t len, cctx_T *cctx)
{
return (cctx != NULL
&& (lookup_local(name, len, NULL, cctx) == OK
|| arg_exists(name, len, NULL, NULL, NULL, cctx) == OK))
|| script_var_exists(name, len, cctx) == OK
|| find_imported(name, len, cctx) != NULL;
}
/*
* Return TRUE if "name" is a local variable, argument, script variable,
* imported or function.
*/
static int
item_exists(char_u *name, size_t len, int cmd UNUSED, cctx_T *cctx)
{
int is_global;
char_u *p;
if (variable_exists(name, len, cctx))
return TRUE;
// This is similar to what is in lookup_scriptitem():
// Find a function, so that a following "->" works.
// Require "(" or "->" to follow, "Cmd" is a user command while "Cmd()" is
// a function call.
p = skipwhite(name + len);
if (name[len] == '(' || (p[0] == '-' && p[1] == '>'))
{
// Do not check for an internal function, since it might also be a
// valid command, such as ":split" versus "split()".
// Skip "g:" before a function name.
is_global = (name[0] == 'g' && name[1] == ':');
return find_func(is_global ? name + 2 : name, is_global, cctx) != NULL;
}
return FALSE;
}
/*
* Check if "p[len]" is already defined, either in script "import_sid" or in
* compilation context "cctx". "cctx" is NULL at the script level.
* Does not check the global namespace.
* If "is_arg" is TRUE the error message is for an argument name.
* Return FAIL and give an error if it defined.
*/
int
check_defined(char_u *p, size_t len, cctx_T *cctx, int is_arg)
{
int c = p[len];
ufunc_T *ufunc = NULL;
// underscore argument is OK
if (len == 1 && *p == '_')
return OK;
if (script_var_exists(p, len, cctx) == OK)
{
if (is_arg)
semsg(_(e_argument_already_declared_in_script_str), p);
else
semsg(_(e_variable_already_declared_in_script_str), p);
return FAIL;
}
p[len] = NUL;
if ((cctx != NULL
&& (lookup_local(p, len, NULL, cctx) == OK
|| arg_exists(p, len, NULL, NULL, NULL, cctx) == OK))
|| find_imported(p, len, cctx) != NULL
|| (ufunc = find_func_even_dead(p, FALSE, cctx)) != NULL)
{
// A local or script-local function can shadow a global function.
if (ufunc == NULL || ((ufunc->uf_flags & FC_DEAD) == 0
&& (!func_is_global(ufunc)
|| (p[0] == 'g' && p[1] == ':'))))
{
if (is_arg)
semsg(_(e_argument_name_shadows_existing_variable_str), p);
else
semsg(_(e_name_already_defined_str), p);
p[len] = c;
return FAIL;
}
}
p[len] = c;
return OK;
}
/////////////////////////////////////////////////////////////////////
// Following generate_ functions expect the caller to call ga_grow().
#define RETURN_NULL_IF_SKIP(cctx) if (cctx->ctx_skip == SKIP_YES) return NULL
#define RETURN_OK_IF_SKIP(cctx) if (cctx->ctx_skip == SKIP_YES) return OK
/*
* Generate an instruction without arguments.
* Returns a pointer to the new instruction, NULL if failed.
*/
static isn_T *
generate_instr(cctx_T *cctx, isntype_T isn_type)
{
garray_T *instr = &cctx->ctx_instr;
isn_T *isn;
RETURN_NULL_IF_SKIP(cctx);
if (ga_grow(instr, 1) == FAIL)
return NULL;
isn = ((isn_T *)instr->ga_data) + instr->ga_len;
isn->isn_type = isn_type;
isn->isn_lnum = cctx->ctx_lnum + 1;
++instr->ga_len;
return isn;
}
/*
* Generate an instruction without arguments.
* "drop" will be removed from the stack.
* Returns a pointer to the new instruction, NULL if failed.
*/
static isn_T *
generate_instr_drop(cctx_T *cctx, isntype_T isn_type, int drop)
{
garray_T *stack = &cctx->ctx_type_stack;
RETURN_NULL_IF_SKIP(cctx);
stack->ga_len -= drop;
return generate_instr(cctx, isn_type);
}
/*
* Generate instruction "isn_type" and put "type" on the type stack.
*/
static isn_T *
generate_instr_type(cctx_T *cctx, isntype_T isn_type, type_T *type)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
if ((isn = generate_instr(cctx, isn_type)) == NULL)
return NULL;
if (ga_grow(stack, 1) == FAIL)
return NULL;
((type_T **)stack->ga_data)[stack->ga_len] = type == NULL ? &t_any : type;
++stack->ga_len;
return isn;
}
/*
* Generate an ISN_DEBUG instruction.
*/
static isn_T *
generate_instr_debug(cctx_T *cctx)
{
isn_T *isn;
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ cctx->ctx_ufunc->uf_dfunc_idx;
if ((isn = generate_instr(cctx, ISN_DEBUG)) == NULL)
return NULL;
isn->isn_arg.debug.dbg_var_names_len = dfunc->df_var_names.ga_len;
isn->isn_arg.debug.dbg_break_lnum = cctx->ctx_prev_lnum;
return isn;
}
/*
* If type at "offset" isn't already VAR_STRING then generate ISN_2STRING.
* But only for simple types.
* When "tolerant" is TRUE convert most types to string, e.g. a List.
*/
static int
may_generate_2STRING(int offset, int tolerant, cctx_T *cctx)
{
isn_T *isn;
isntype_T isntype = ISN_2STRING;
garray_T *stack = &cctx->ctx_type_stack;
type_T **type;
RETURN_OK_IF_SKIP(cctx);
type = ((type_T **)stack->ga_data) + stack->ga_len + offset;
switch ((*type)->tt_type)
{
// nothing to be done
case VAR_STRING: return OK;
// conversion possible
case VAR_SPECIAL:
case VAR_BOOL:
case VAR_NUMBER:
case VAR_FLOAT:
break;
// conversion possible (with runtime check)
case VAR_ANY:
case VAR_UNKNOWN:
isntype = ISN_2STRING_ANY;
break;
// conversion possible when tolerant
case VAR_LIST:
if (tolerant)
{
isntype = ISN_2STRING_ANY;
break;
}
// FALLTHROUGH
// conversion not possible
case VAR_VOID:
case VAR_BLOB:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_DICT:
case VAR_JOB:
case VAR_CHANNEL:
case VAR_INSTR:
to_string_error((*type)->tt_type);
return FAIL;
}
*type = &t_string;
if ((isn = generate_instr(cctx, isntype)) == NULL)
return FAIL;
isn->isn_arg.tostring.offset = offset;
isn->isn_arg.tostring.tolerant = tolerant;
return OK;
}
static int
check_number_or_float(vartype_T type1, vartype_T type2, char_u *op)
{
if (!((type1 == VAR_NUMBER || type1 == VAR_FLOAT || type1 == VAR_ANY)
&& (type2 == VAR_NUMBER || type2 == VAR_FLOAT
|| type2 == VAR_ANY)))
{
if (*op == '+')
emsg(_(e_wrong_argument_type_for_plus));
else
semsg(_(e_char_requires_number_or_float_arguments), *op);
return FAIL;
}
return OK;
}
static int
generate_add_instr(
cctx_T *cctx,
vartype_T vartype,
type_T *type1,
type_T *type2)
{
garray_T *stack = &cctx->ctx_type_stack;
isn_T *isn = generate_instr_drop(cctx,
vartype == VAR_NUMBER ? ISN_OPNR
: vartype == VAR_LIST ? ISN_ADDLIST
: vartype == VAR_BLOB ? ISN_ADDBLOB
#ifdef FEAT_FLOAT
: vartype == VAR_FLOAT ? ISN_OPFLOAT
#endif
: ISN_OPANY, 1);
if (vartype != VAR_LIST && vartype != VAR_BLOB
&& type1->tt_type != VAR_ANY
&& type2->tt_type != VAR_ANY
&& check_number_or_float(
type1->tt_type, type2->tt_type, (char_u *)"+") == FAIL)
return FAIL;
if (isn != NULL)
isn->isn_arg.op.op_type = EXPR_ADD;
// When concatenating two lists with different member types the member type
// becomes "any".
if (vartype == VAR_LIST
&& type1->tt_type == VAR_LIST && type2->tt_type == VAR_LIST
&& type1->tt_member != type2->tt_member)
(((type_T **)stack->ga_data)[stack->ga_len - 1]) = &t_list_any;
return isn == NULL ? FAIL : OK;
}
/*
* Get the type to use for an instruction for an operation on "type1" and
* "type2". If they are matching use a type-specific instruction. Otherwise
* fall back to runtime type checking.
*/
static vartype_T
operator_type(type_T *type1, type_T *type2)
{
if (type1->tt_type == type2->tt_type
&& (type1->tt_type == VAR_NUMBER
|| type1->tt_type == VAR_LIST
#ifdef FEAT_FLOAT
|| type1->tt_type == VAR_FLOAT
#endif
|| type1->tt_type == VAR_BLOB))
return type1->tt_type;
return VAR_ANY;
}
/*
* Generate an instruction with two arguments. The instruction depends on the
* type of the arguments.
*/
static int
generate_two_op(cctx_T *cctx, char_u *op)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *type1;
type_T *type2;
vartype_T vartype;
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
// Get the known type of the two items on the stack.
type1 = ((type_T **)stack->ga_data)[stack->ga_len - 2];
type2 = ((type_T **)stack->ga_data)[stack->ga_len - 1];
vartype = operator_type(type1, type2);
switch (*op)
{
case '+':
if (generate_add_instr(cctx, vartype, type1, type2) == FAIL)
return FAIL;
break;
case '-':
case '*':
case '/': if (check_number_or_float(type1->tt_type, type2->tt_type,
op) == FAIL)
return FAIL;
if (vartype == VAR_NUMBER)
isn = generate_instr_drop(cctx, ISN_OPNR, 1);
#ifdef FEAT_FLOAT
else if (vartype == VAR_FLOAT)
isn = generate_instr_drop(cctx, ISN_OPFLOAT, 1);
#endif
else
isn = generate_instr_drop(cctx, ISN_OPANY, 1);
if (isn != NULL)
isn->isn_arg.op.op_type = *op == '*'
? EXPR_MULT : *op == '/'? EXPR_DIV : EXPR_SUB;
break;
case '%': if ((type1->tt_type != VAR_ANY
&& type1->tt_type != VAR_NUMBER)
|| (type2->tt_type != VAR_ANY
&& type2->tt_type != VAR_NUMBER))
{
emsg(_(e_percent_requires_number_arguments));
return FAIL;
}
isn = generate_instr_drop(cctx,
vartype == VAR_NUMBER ? ISN_OPNR : ISN_OPANY, 1);
if (isn != NULL)
isn->isn_arg.op.op_type = EXPR_REM;
break;
}
// correct type of result
if (vartype == VAR_ANY)
{
type_T *type = &t_any;
#ifdef FEAT_FLOAT
// float+number and number+float results in float
if ((type1->tt_type == VAR_NUMBER || type1->tt_type == VAR_FLOAT)
&& (type2->tt_type == VAR_NUMBER || type2->tt_type == VAR_FLOAT))
type = &t_float;
#endif
((type_T **)stack->ga_data)[stack->ga_len - 1] = type;
}
return OK;
}
/*
* Get the instruction to use for comparing "type1" with "type2"
* Return ISN_DROP when failed.
*/
static isntype_T
get_compare_isn(exprtype_T exprtype, vartype_T type1, vartype_T type2)
{
isntype_T isntype = ISN_DROP;
if (type1 == VAR_UNKNOWN)
type1 = VAR_ANY;
if (type2 == VAR_UNKNOWN)
type2 = VAR_ANY;
if (type1 == type2)
{
switch (type1)
{
case VAR_BOOL: isntype = ISN_COMPAREBOOL; break;
case VAR_SPECIAL: isntype = ISN_COMPARESPECIAL; break;
case VAR_NUMBER: isntype = ISN_COMPARENR; break;
case VAR_FLOAT: isntype = ISN_COMPAREFLOAT; break;
case VAR_STRING: isntype = ISN_COMPARESTRING; break;
case VAR_BLOB: isntype = ISN_COMPAREBLOB; break;
case VAR_LIST: isntype = ISN_COMPARELIST; break;
case VAR_DICT: isntype = ISN_COMPAREDICT; break;
case VAR_FUNC: isntype = ISN_COMPAREFUNC; break;
default: isntype = ISN_COMPAREANY; break;
}
}
else if (type1 == VAR_ANY || type2 == VAR_ANY
|| ((type1 == VAR_NUMBER || type1 == VAR_FLOAT)
&& (type2 == VAR_NUMBER || type2 == VAR_FLOAT)))
isntype = ISN_COMPAREANY;
if ((exprtype == EXPR_IS || exprtype == EXPR_ISNOT)
&& (isntype == ISN_COMPAREBOOL
|| isntype == ISN_COMPARESPECIAL
|| isntype == ISN_COMPARENR
|| isntype == ISN_COMPAREFLOAT))
{
semsg(_(e_cannot_use_str_with_str),
exprtype == EXPR_IS ? "is" : "isnot" , vartype_name(type1));
return ISN_DROP;
}
if (isntype == ISN_DROP
|| ((exprtype != EXPR_EQUAL && exprtype != EXPR_NEQUAL
&& (type1 == VAR_BOOL || type1 == VAR_SPECIAL
|| type2 == VAR_BOOL || type2 == VAR_SPECIAL)))
|| ((exprtype != EXPR_EQUAL && exprtype != EXPR_NEQUAL
&& exprtype != EXPR_IS && exprtype != EXPR_ISNOT
&& (type1 == VAR_BLOB || type2 == VAR_BLOB
|| type1 == VAR_LIST || type2 == VAR_LIST))))
{
semsg(_(e_cannot_compare_str_with_str),
vartype_name(type1), vartype_name(type2));
return ISN_DROP;
}
return isntype;
}
int
check_compare_types(exprtype_T type, typval_T *tv1, typval_T *tv2)
{
if (get_compare_isn(type, tv1->v_type, tv2->v_type) == ISN_DROP)
return FAIL;
return OK;
}
/*
* Generate an ISN_COMPARE* instruction with a boolean result.
*/
static int
generate_COMPARE(cctx_T *cctx, exprtype_T exprtype, int ic)
{
isntype_T isntype;
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
vartype_T type1;
vartype_T type2;
RETURN_OK_IF_SKIP(cctx);
// Get the known type of the two items on the stack. If they are matching
// use a type-specific instruction. Otherwise fall back to runtime type
// checking.
type1 = ((type_T **)stack->ga_data)[stack->ga_len - 2]->tt_type;
type2 = ((type_T **)stack->ga_data)[stack->ga_len - 1]->tt_type;
isntype = get_compare_isn(exprtype, type1, type2);
if (isntype == ISN_DROP)
return FAIL;
if ((isn = generate_instr(cctx, isntype)) == NULL)
return FAIL;
isn->isn_arg.op.op_type = exprtype;
isn->isn_arg.op.op_ic = ic;
// takes two arguments, puts one bool back
if (stack->ga_len >= 2)
{
--stack->ga_len;
((type_T **)stack->ga_data)[stack->ga_len - 1] = &t_bool;
}
return OK;
}
/*
* Generate an ISN_2BOOL instruction.
* "offset" is the offset in the type stack.
*/
static int
generate_2BOOL(cctx_T *cctx, int invert, int offset)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_2BOOL)) == NULL)
return FAIL;
isn->isn_arg.tobool.invert = invert;
isn->isn_arg.tobool.offset = offset;
// type becomes bool
((type_T **)stack->ga_data)[stack->ga_len + offset] = &t_bool;
return OK;
}
/*
* Generate an ISN_COND2BOOL instruction.
*/
static int
generate_COND2BOOL(cctx_T *cctx)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_COND2BOOL)) == NULL)
return FAIL;
// type becomes bool
((type_T **)stack->ga_data)[stack->ga_len - 1] = &t_bool;
return OK;
}
static int
generate_TYPECHECK(
cctx_T *cctx,
type_T *expected,
int offset,
int argidx)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_CHECKTYPE)) == NULL)
return FAIL;
isn->isn_arg.type.ct_type = alloc_type(expected);
isn->isn_arg.type.ct_off = (int8_T)offset;
isn->isn_arg.type.ct_arg_idx = (int8_T)argidx;
// type becomes expected
((type_T **)stack->ga_data)[stack->ga_len + offset] = expected;
return OK;
}
static int
generate_SETTYPE(
cctx_T *cctx,
type_T *expected)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_SETTYPE)) == NULL)
return FAIL;
isn->isn_arg.type.ct_type = alloc_type(expected);
return OK;
}
/*
* Return TRUE if "actual" could be "expected" and a runtime typecheck is to be
* used. Return FALSE if the types will never match.
*/
int
use_typecheck(type_T *actual, type_T *expected)
{
if (actual->tt_type == VAR_ANY
|| actual->tt_type == VAR_UNKNOWN
|| (actual->tt_type == VAR_FUNC
&& (expected->tt_type == VAR_FUNC
|| expected->tt_type == VAR_PARTIAL)
&& (actual->tt_member == &t_any || actual->tt_argcount < 0)
&& ((actual->tt_member == &t_void)
== (expected->tt_member == &t_void))))
return TRUE;
if ((actual->tt_type == VAR_LIST || actual->tt_type == VAR_DICT)
&& actual->tt_type == expected->tt_type)
// This takes care of a nested list or dict.
return use_typecheck(actual->tt_member, expected->tt_member);
return FALSE;
}
/*
* Check that
* - "actual" matches "expected" type or
* - "actual" is a type that can be "expected" type: add a runtime check; or
* - return FAIL.
* If "actual_is_const" is TRUE then the type won't change at runtime, do not
* generate a TYPECHECK.
*/
int
need_type(
type_T *actual,
type_T *expected,
int offset,
int arg_idx,
cctx_T *cctx,
int silent,
int actual_is_const)
{
where_T where;
if (expected == &t_bool && actual != &t_bool
&& (actual->tt_flags & TTFLAG_BOOL_OK))
{
// Using "0", "1" or the result of an expression with "&&" or "||" as a
// boolean is OK but requires a conversion.
generate_2BOOL(cctx, FALSE, offset);
return OK;
}
where.wt_index = arg_idx;
where.wt_variable = FALSE;
if (check_type(expected, actual, FALSE, where) == OK)
return OK;
// If the actual type can be the expected type add a runtime check.
// If it's a constant a runtime check makes no sense.
if (!actual_is_const && use_typecheck(actual, expected))
{
generate_TYPECHECK(cctx, expected, offset, arg_idx);
return OK;
}
if (!silent)
arg_type_mismatch(expected, actual, arg_idx);
return FAIL;
}
/*
* Check that the top of the type stack has a type that can be used as a
* condition. Give an error and return FAIL if not.
*/
static int
bool_on_stack(cctx_T *cctx)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (type == &t_bool)
return OK;
if (type == &t_any || type == &t_number || type == &t_number_bool)
// Number 0 and 1 are OK to use as a bool. "any" could also be a bool.
// This requires a runtime type check.
return generate_COND2BOOL(cctx);
return need_type(type, &t_bool, -1, 0, cctx, FALSE, FALSE);
}
/*
* Generate an ISN_PUSHNR instruction.
*/
static int
generate_PUSHNR(cctx_T *cctx, varnumber_T number)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHNR, &t_number)) == NULL)
return FAIL;
isn->isn_arg.number = number;
if (number == 0 || number == 1)
// A 0 or 1 number can also be used as a bool.
((type_T **)stack->ga_data)[stack->ga_len - 1] = &t_number_bool;
return OK;
}
/*
* Generate an ISN_PUSHBOOL instruction.
*/
static int
generate_PUSHBOOL(cctx_T *cctx, varnumber_T number)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHBOOL, &t_bool)) == NULL)
return FAIL;
isn->isn_arg.number = number;
return OK;
}
/*
* Generate an ISN_PUSHSPEC instruction.
*/
static int
generate_PUSHSPEC(cctx_T *cctx, varnumber_T number)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHSPEC, &t_special)) == NULL)
return FAIL;
isn->isn_arg.number = number;
return OK;
}
#ifdef FEAT_FLOAT
/*
* Generate an ISN_PUSHF instruction.
*/
static int
generate_PUSHF(cctx_T *cctx, float_T fnumber)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHF, &t_float)) == NULL)
return FAIL;
isn->isn_arg.fnumber = fnumber;
return OK;
}
#endif
/*
* Generate an ISN_PUSHS instruction.
* Consumes "str".
*/
static int
generate_PUSHS(cctx_T *cctx, char_u *str)
{
isn_T *isn;
if (cctx->ctx_skip == SKIP_YES)
{
vim_free(str);
return OK;
}
if ((isn = generate_instr_type(cctx, ISN_PUSHS, &t_string)) == NULL)
return FAIL;
isn->isn_arg.string = str;
return OK;
}
/*
* Generate an ISN_PUSHCHANNEL instruction.
* Consumes "channel".
*/
static int
generate_PUSHCHANNEL(cctx_T *cctx, channel_T *channel)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHCHANNEL, &t_channel)) == NULL)
return FAIL;
isn->isn_arg.channel = channel;
return OK;
}
/*
* Generate an ISN_PUSHJOB instruction.
* Consumes "job".
*/
static int
generate_PUSHJOB(cctx_T *cctx, job_T *job)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHJOB, &t_channel)) == NULL)
return FAIL;
isn->isn_arg.job = job;
return OK;
}
/*
* Generate an ISN_PUSHBLOB instruction.
* Consumes "blob".
*/
static int
generate_PUSHBLOB(cctx_T *cctx, blob_T *blob)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHBLOB, &t_blob)) == NULL)
return FAIL;
isn->isn_arg.blob = blob;
return OK;
}
/*
* Generate an ISN_PUSHFUNC instruction with name "name".
* Consumes "name".
*/
static int
generate_PUSHFUNC(cctx_T *cctx, char_u *name, type_T *type)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_PUSHFUNC, type)) == NULL)
return FAIL;
isn->isn_arg.string = name == NULL ? NULL : vim_strsave(name);
return OK;
}
/*
* Generate an ISN_GETITEM instruction with "index".
* "with_op" is TRUE for "+=" and other operators, the stack has the current
* value below the list with values.
*/
static int
generate_GETITEM(cctx_T *cctx, int index, int with_op)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
type_T *type = ((type_T **)stack->ga_data)[stack->ga_len
- (with_op ? 2 : 1)];
type_T *item_type = &t_any;
RETURN_OK_IF_SKIP(cctx);
if (type->tt_type != VAR_LIST)
{
// cannot happen, caller has checked the type
emsg(_(e_listreq));
return FAIL;
}
item_type = type->tt_member;
if ((isn = generate_instr(cctx, ISN_GETITEM)) == NULL)
return FAIL;
isn->isn_arg.getitem.gi_index = index;
isn->isn_arg.getitem.gi_with_op = with_op;
// add the item type to the type stack
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] = item_type;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_SLICE instruction with "count".
*/
static int
generate_SLICE(cctx_T *cctx, int count)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_SLICE)) == NULL)
return FAIL;
isn->isn_arg.number = count;
return OK;
}
/*
* Generate an ISN_CHECKLEN instruction with "min_len".
*/
static int
generate_CHECKLEN(cctx_T *cctx, int min_len, int more_OK)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_CHECKLEN)) == NULL)
return FAIL;
isn->isn_arg.checklen.cl_min_len = min_len;
isn->isn_arg.checklen.cl_more_OK = more_OK;
return OK;
}
/*
* Generate an ISN_STORE instruction.
*/
static int
generate_STORE(cctx_T *cctx, isntype_T isn_type, int idx, char_u *name)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_drop(cctx, isn_type, 1)) == NULL)
return FAIL;
if (name != NULL)
isn->isn_arg.string = vim_strsave(name);
else
isn->isn_arg.number = idx;
return OK;
}
/*
* Generate an ISN_STOREOUTER instruction.
*/
static int
generate_STOREOUTER(cctx_T *cctx, int idx, int level)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_drop(cctx, ISN_STOREOUTER, 1)) == NULL)
return FAIL;
isn->isn_arg.outer.outer_idx = idx;
isn->isn_arg.outer.outer_depth = level;
return OK;
}
/*
* Generate an ISN_STORENR instruction (short for ISN_PUSHNR + ISN_STORE)
*/
static int
generate_STORENR(cctx_T *cctx, int idx, varnumber_T value)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_STORENR)) == NULL)
return FAIL;
isn->isn_arg.storenr.stnr_idx = idx;
isn->isn_arg.storenr.stnr_val = value;
return OK;
}
/*
* Generate an ISN_STOREOPT instruction
*/
static int
generate_STOREOPT(cctx_T *cctx, char_u *name, int opt_flags)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_drop(cctx, ISN_STOREOPT, 1)) == NULL)
return FAIL;
isn->isn_arg.storeopt.so_name = vim_strsave(name);
isn->isn_arg.storeopt.so_flags = opt_flags;
return OK;
}
/*
* Generate an ISN_LOAD or similar instruction.
*/
static int
generate_LOAD(
cctx_T *cctx,
isntype_T isn_type,
int idx,
char_u *name,
type_T *type)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, isn_type, type)) == NULL)
return FAIL;
if (name != NULL)
isn->isn_arg.string = vim_strsave(name);
else
isn->isn_arg.number = idx;
return OK;
}
/*
* Generate an ISN_LOADOUTER instruction
*/
static int
generate_LOADOUTER(
cctx_T *cctx,
int idx,
int nesting,
type_T *type)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_type(cctx, ISN_LOADOUTER, type)) == NULL)
return FAIL;
isn->isn_arg.outer.outer_idx = idx;
isn->isn_arg.outer.outer_depth = nesting;
return OK;
}
/*
* Generate an ISN_LOADV instruction for v:var.
*/
static int
generate_LOADV(
cctx_T *cctx,
char_u *name,
int error)
{
int di_flags;
int vidx = find_vim_var(name, &di_flags);
type_T *type;
RETURN_OK_IF_SKIP(cctx);
if (vidx < 0)
{
if (error)
semsg(_(e_variable_not_found_str), name);
return FAIL;
}
type = typval2type_vimvar(get_vim_var_tv(vidx), cctx->ctx_type_list);
return generate_LOAD(cctx, ISN_LOADV, vidx, NULL, type);
}
/*
* Generate an ISN_UNLET instruction.
*/
static int
generate_UNLET(cctx_T *cctx, isntype_T isn_type, char_u *name, int forceit)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, isn_type)) == NULL)
return FAIL;
isn->isn_arg.unlet.ul_name = vim_strsave(name);
isn->isn_arg.unlet.ul_forceit = forceit;
return OK;
}
/*
* Generate an ISN_LOCKCONST instruction.
*/
static int
generate_LOCKCONST(cctx_T *cctx)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_LOCKCONST)) == NULL)
return FAIL;
return OK;
}
/*
* Generate an ISN_LOADS instruction.
*/
static int
generate_OLDSCRIPT(
cctx_T *cctx,
isntype_T isn_type,
char_u *name,
int sid,
type_T *type)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if (isn_type == ISN_LOADS)
isn = generate_instr_type(cctx, isn_type, type);
else
isn = generate_instr_drop(cctx, isn_type, 1);
if (isn == NULL)
return FAIL;
isn->isn_arg.loadstore.ls_name = vim_strsave(name);
isn->isn_arg.loadstore.ls_sid = sid;
return OK;
}
/*
* Generate an ISN_LOADSCRIPT or ISN_STORESCRIPT instruction.
*/
static int
generate_VIM9SCRIPT(
cctx_T *cctx,
isntype_T isn_type,
int sid,
int idx,
type_T *type)
{
isn_T *isn;
scriptref_T *sref;
scriptitem_T *si = SCRIPT_ITEM(sid);
RETURN_OK_IF_SKIP(cctx);
if (isn_type == ISN_LOADSCRIPT)
isn = generate_instr_type(cctx, isn_type, type);
else
isn = generate_instr_drop(cctx, isn_type, 1);
if (isn == NULL)
return FAIL;
// This requires three arguments, which doesn't fit in an instruction, thus
// we need to allocate a struct for this.
sref = ALLOC_ONE(scriptref_T);
if (sref == NULL)
return FAIL;
isn->isn_arg.script.scriptref = sref;
sref->sref_sid = sid;
sref->sref_idx = idx;
sref->sref_seq = si->sn_script_seq;
sref->sref_type = type;
return OK;
}
/*
* Generate an ISN_NEWLIST instruction.
*/
static int
generate_NEWLIST(cctx_T *cctx, int count)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
type_T *member;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_NEWLIST)) == NULL)
return FAIL;
isn->isn_arg.number = count;
// get the member type from all the items on the stack.
if (count == 0)
member = &t_void;
else
member = get_member_type_from_stack(
((type_T **)stack->ga_data) + stack->ga_len, count, 1,
cctx->ctx_type_list);
type = get_list_type(member, cctx->ctx_type_list);
// drop the value types
stack->ga_len -= count;
// add the list type to the type stack
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] = type;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_NEWDICT instruction.
*/
static int
generate_NEWDICT(cctx_T *cctx, int count)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
type_T *member;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_NEWDICT)) == NULL)
return FAIL;
isn->isn_arg.number = count;
if (count == 0)
member = &t_void;
else
member = get_member_type_from_stack(
((type_T **)stack->ga_data) + stack->ga_len, count, 2,
cctx->ctx_type_list);
type = get_dict_type(member, cctx->ctx_type_list);
// drop the key and value types
stack->ga_len -= 2 * count;
// add the dict type to the type stack
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] = type;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_FUNCREF instruction.
*/
static int
generate_FUNCREF(cctx_T *cctx, ufunc_T *ufunc)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_FUNCREF)) == NULL)
return FAIL;
isn->isn_arg.funcref.fr_func = ufunc->uf_dfunc_idx;
cctx->ctx_has_closure = 1;
// If the referenced function is a closure, it may use items further up in
// the nested context, including this one.
if (ufunc->uf_flags & FC_CLOSURE)
cctx->ctx_ufunc->uf_flags |= FC_CLOSURE;
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] =
ufunc->uf_func_type == NULL ? &t_func_any : ufunc->uf_func_type;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_NEWFUNC instruction.
* "lambda_name" and "func_name" must be in allocated memory and will be
* consumed.
*/
static int
generate_NEWFUNC(cctx_T *cctx, char_u *lambda_name, char_u *func_name)
{
isn_T *isn;
if (cctx->ctx_skip == SKIP_YES)
{
vim_free(lambda_name);
vim_free(func_name);
return OK;
}
if ((isn = generate_instr(cctx, ISN_NEWFUNC)) == NULL)
{
vim_free(lambda_name);
vim_free(func_name);
return FAIL;
}
isn->isn_arg.newfunc.nf_lambda = lambda_name;
isn->isn_arg.newfunc.nf_global = func_name;
return OK;
}
/*
* Generate an ISN_DEF instruction: list functions
*/
static int
generate_DEF(cctx_T *cctx, char_u *name, size_t len)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_DEF)) == NULL)
return FAIL;
if (len > 0)
{
isn->isn_arg.string = vim_strnsave(name, len);
if (isn->isn_arg.string == NULL)
return FAIL;
}
return OK;
}
/*
* Generate an ISN_JUMP instruction.
*/
static int
generate_JUMP(cctx_T *cctx, jumpwhen_T when, int where)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_JUMP)) == NULL)
return FAIL;
isn->isn_arg.jump.jump_when = when;
isn->isn_arg.jump.jump_where = where;
if (when != JUMP_ALWAYS && stack->ga_len > 0)
--stack->ga_len;
return OK;
}
/*
* Generate an ISN_JUMP_IF_ARG_SET instruction.
*/
static int
generate_JUMP_IF_ARG_SET(cctx_T *cctx, int arg_off)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_JUMP_IF_ARG_SET)) == NULL)
return FAIL;
isn->isn_arg.jumparg.jump_arg_off = arg_off;
// jump_where is set later
return OK;
}
static int
generate_FOR(cctx_T *cctx, int loop_idx)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_FOR)) == NULL)
return FAIL;
isn->isn_arg.forloop.for_idx = loop_idx;
if (ga_grow(stack, 1) == FAIL)
return FAIL;
// type doesn't matter, will be stored next
((type_T **)stack->ga_data)[stack->ga_len] = &t_any;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_TRYCONT instruction.
*/
static int
generate_TRYCONT(cctx_T *cctx, int levels, int where)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_TRYCONT)) == NULL)
return FAIL;
isn->isn_arg.trycont.tct_levels = levels;
isn->isn_arg.trycont.tct_where = where;
return OK;
}
/*
* Generate an ISN_BCALL instruction.
* "method_call" is TRUE for "value->method()"
* Return FAIL if the number of arguments is wrong.
*/
static int
generate_BCALL(cctx_T *cctx, int func_idx, int argcount, int method_call)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
int argoff;
type_T **argtypes = NULL;
type_T *maptype = NULL;
RETURN_OK_IF_SKIP(cctx);
argoff = check_internal_func(func_idx, argcount);
if (argoff < 0)
return FAIL;
if (method_call && argoff > 1)
{
if ((isn = generate_instr(cctx, ISN_SHUFFLE)) == NULL)
return FAIL;
isn->isn_arg.shuffle.shfl_item = argcount;
isn->isn_arg.shuffle.shfl_up = argoff - 1;
}
if (argcount > 0)
{
// Check the types of the arguments.
argtypes = ((type_T **)stack->ga_data) + stack->ga_len - argcount;
if (internal_func_check_arg_types(argtypes, func_idx, argcount,
cctx) == FAIL)
return FAIL;
if (internal_func_is_map(func_idx))
maptype = *argtypes;
}
if ((isn = generate_instr(cctx, ISN_BCALL)) == NULL)
return FAIL;
isn->isn_arg.bfunc.cbf_idx = func_idx;
isn->isn_arg.bfunc.cbf_argcount = argcount;
// Drop the argument types and push the return type.
stack->ga_len -= argcount;
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] =
internal_func_ret_type(func_idx, argcount, argtypes);
++stack->ga_len;
if (maptype != NULL && maptype->tt_member != NULL
&& maptype->tt_member != &t_any)
// Check that map() didn't change the item types.
generate_TYPECHECK(cctx, maptype, -1, 1);
return OK;
}
/*
* Generate an ISN_LISTAPPEND instruction. Works like add().
* Argument count is already checked.
*/
static int
generate_LISTAPPEND(cctx_T *cctx)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *list_type;
type_T *item_type;
type_T *expected;
// Caller already checked that list_type is a list.
list_type = ((type_T **)stack->ga_data)[stack->ga_len - 2];
item_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
expected = list_type->tt_member;
if (need_type(item_type, expected, -1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
if (generate_instr(cctx, ISN_LISTAPPEND) == NULL)
return FAIL;
--stack->ga_len; // drop the argument
return OK;
}
/*
* Generate an ISN_BLOBAPPEND instruction. Works like add().
* Argument count is already checked.
*/
static int
generate_BLOBAPPEND(cctx_T *cctx)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *item_type;
// Caller already checked that blob_type is a blob.
item_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (need_type(item_type, &t_number, -1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
if (generate_instr(cctx, ISN_BLOBAPPEND) == NULL)
return FAIL;
--stack->ga_len; // drop the argument
return OK;
}
/*
* Return TRUE if "ufunc" should be compiled, taking into account whether
* "profile" indicates profiling is to be done.
*/
int
func_needs_compiling(ufunc_T *ufunc, compiletype_T compile_type)
{
switch (ufunc->uf_def_status)
{
case UF_TO_BE_COMPILED:
return TRUE;
case UF_COMPILED:
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
switch (compile_type)
{
case CT_PROFILE:
#ifdef FEAT_PROFILE
return dfunc->df_instr_prof == NULL;
#endif
case CT_NONE:
return dfunc->df_instr == NULL;
case CT_DEBUG:
return dfunc->df_instr_debug == NULL;
}
}
case UF_NOT_COMPILED:
case UF_COMPILE_ERROR:
case UF_COMPILING:
break;
}
return FALSE;
}
/*
* Generate an ISN_DCALL or ISN_UCALL instruction.
* Return FAIL if the number of arguments is wrong.
*/
static int
generate_CALL(cctx_T *cctx, ufunc_T *ufunc, int pushed_argcount)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
int regular_args = ufunc->uf_args.ga_len;
int argcount = pushed_argcount;
RETURN_OK_IF_SKIP(cctx);
if (argcount > regular_args && !has_varargs(ufunc))
{
semsg(_(e_toomanyarg), printable_func_name(ufunc));
return FAIL;
}
if (argcount < regular_args - ufunc->uf_def_args.ga_len)
{
semsg(_(e_toofewarg), printable_func_name(ufunc));
return FAIL;
}
if (ufunc->uf_def_status != UF_NOT_COMPILED
&& ufunc->uf_def_status != UF_COMPILE_ERROR)
{
int i;
for (i = 0; i < argcount; ++i)
{
type_T *expected;
type_T *actual;
actual = ((type_T **)stack->ga_data)[stack->ga_len - argcount + i];
if (actual == &t_special
&& i >= regular_args - ufunc->uf_def_args.ga_len)
{
// assume v:none used for default argument value
continue;
}
if (i < regular_args)
{
if (ufunc->uf_arg_types == NULL)
continue;
expected = ufunc->uf_arg_types[i];
}
else if (ufunc->uf_va_type == NULL
|| ufunc->uf_va_type == &t_list_any)
// possibly a lambda or "...: any"
expected = &t_any;
else
expected = ufunc->uf_va_type->tt_member;
if (need_type(actual, expected, -argcount + i, i + 1, cctx,
TRUE, FALSE) == FAIL)
{
arg_type_mismatch(expected, actual, i + 1);
return FAIL;
}
}
if (func_needs_compiling(ufunc, COMPILE_TYPE(ufunc))
&& compile_def_function(ufunc, ufunc->uf_ret_type == NULL,
COMPILE_TYPE(ufunc), NULL) == FAIL)
return FAIL;
}
if (ufunc->uf_def_status == UF_COMPILE_ERROR)
{
emsg_funcname(_(e_call_to_function_that_failed_to_compile_str),
ufunc->uf_name);
return FAIL;
}
if ((isn = generate_instr(cctx,
ufunc->uf_def_status != UF_NOT_COMPILED ? ISN_DCALL
: ISN_UCALL)) == NULL)
return FAIL;
if (isn->isn_type == ISN_DCALL)
{
isn->isn_arg.dfunc.cdf_idx = ufunc->uf_dfunc_idx;
isn->isn_arg.dfunc.cdf_argcount = argcount;
}
else
{
// A user function may be deleted and redefined later, can't use the
// ufunc pointer, need to look it up again at runtime.
isn->isn_arg.ufunc.cuf_name = vim_strsave(ufunc->uf_name);
isn->isn_arg.ufunc.cuf_argcount = argcount;
}
stack->ga_len -= argcount; // drop the arguments
if (ga_grow(stack, 1) == FAIL)
return FAIL;
// add return value
((type_T **)stack->ga_data)[stack->ga_len] = ufunc->uf_ret_type;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_UCALL instruction when the function isn't defined yet.
*/
static int
generate_UCALL(cctx_T *cctx, char_u *name, int argcount)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_UCALL)) == NULL)
return FAIL;
isn->isn_arg.ufunc.cuf_name = vim_strsave(name);
isn->isn_arg.ufunc.cuf_argcount = argcount;
stack->ga_len -= argcount; // drop the arguments
if (ga_grow(stack, 1) == FAIL)
return FAIL;
// add return value
((type_T **)stack->ga_data)[stack->ga_len] = &t_any;
++stack->ga_len;
return OK;
}
/*
* Generate an ISN_PCALL instruction.
* "type" is the type of the FuncRef.
*/
static int
generate_PCALL(
cctx_T *cctx,
int argcount,
char_u *name,
type_T *type,
int at_top)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
type_T *ret_type;
RETURN_OK_IF_SKIP(cctx);
if (type->tt_type == VAR_ANY)
ret_type = &t_any;
else if (type->tt_type == VAR_FUNC || type->tt_type == VAR_PARTIAL)
{
if (type->tt_argcount != -1)
{
int varargs = (type->tt_flags & TTFLAG_VARARGS) ? 1 : 0;
if (argcount < type->tt_min_argcount - varargs)
{
semsg(_(e_toofewarg), name);
return FAIL;
}
if (!varargs && argcount > type->tt_argcount)
{
semsg(_(e_toomanyarg), name);
return FAIL;
}
if (type->tt_args != NULL)
{
int i;
for (i = 0; i < argcount; ++i)
{
int offset = -argcount + i - (at_top ? 0 : 1);
type_T *actual = ((type_T **)stack->ga_data)[
stack->ga_len + offset];
type_T *expected;
if (varargs && i >= type->tt_argcount - 1)
expected = type->tt_args[
type->tt_argcount - 1]->tt_member;
else if (i >= type->tt_min_argcount
&& actual == &t_special)
expected = &t_any;
else
expected = type->tt_args[i];
if (need_type(actual, expected, offset, i + 1,
cctx, TRUE, FALSE) == FAIL)
{
arg_type_mismatch(expected, actual, i + 1);
return FAIL;
}
}
}
}
ret_type = type->tt_member;
}
else
{
semsg(_(e_not_callable_type_str), name);
return FAIL;
}
if ((isn = generate_instr(cctx, ISN_PCALL)) == NULL)
return FAIL;
isn->isn_arg.pfunc.cpf_top = at_top;
isn->isn_arg.pfunc.cpf_argcount = argcount;
stack->ga_len -= argcount; // drop the arguments
// drop the funcref/partial, get back the return value
((type_T **)stack->ga_data)[stack->ga_len - 1] = ret_type;
// If partial is above the arguments it must be cleared and replaced with
// the return value.
if (at_top && generate_instr(cctx, ISN_PCALL_END) == NULL)
return FAIL;
return OK;
}
/*
* Generate an ISN_STRINGMEMBER instruction.
*/
static int
generate_STRINGMEMBER(cctx_T *cctx, char_u *name, size_t len)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_STRINGMEMBER)) == NULL)
return FAIL;
isn->isn_arg.string = vim_strnsave(name, len);
// check for dict type
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (type->tt_type != VAR_DICT && type != &t_any)
{
emsg(_(e_dictreq));
return FAIL;
}
// change dict type to dict member type
if (type->tt_type == VAR_DICT)
{
((type_T **)stack->ga_data)[stack->ga_len - 1] =
type->tt_member == &t_unknown ? &t_any : type->tt_member;
}
return OK;
}
/*
* Generate an ISN_ECHO instruction.
*/
static int
generate_ECHO(cctx_T *cctx, int with_white, int count)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr_drop(cctx, ISN_ECHO, count)) == NULL)
return FAIL;
isn->isn_arg.echo.echo_with_white = with_white;
isn->isn_arg.echo.echo_count = count;
return OK;
}
/*
* Generate an ISN_EXECUTE/ISN_ECHOMSG/ISN_ECHOERR instruction.
*/
static int
generate_MULT_EXPR(cctx_T *cctx, isntype_T isn_type, int count)
{
isn_T *isn;
if ((isn = generate_instr_drop(cctx, isn_type, count)) == NULL)
return FAIL;
isn->isn_arg.number = count;
return OK;
}
/*
* Generate an ISN_PUT instruction.
*/
static int
generate_PUT(cctx_T *cctx, int regname, linenr_T lnum)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_PUT)) == NULL)
return FAIL;
isn->isn_arg.put.put_regname = regname;
isn->isn_arg.put.put_lnum = lnum;
return OK;
}
static int
generate_EXEC(cctx_T *cctx, char_u *line)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_EXEC)) == NULL)
return FAIL;
isn->isn_arg.string = vim_strsave(line);
return OK;
}
static int
generate_LEGACY_EVAL(cctx_T *cctx, char_u *line)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_LEGACY_EVAL)) == NULL)
return FAIL;
isn->isn_arg.string = vim_strsave(line);
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] = &t_any;
++stack->ga_len;
return OK;
}
static int
generate_EXECCONCAT(cctx_T *cctx, int count)
{
isn_T *isn;
if ((isn = generate_instr_drop(cctx, ISN_EXECCONCAT, count)) == NULL)
return FAIL;
isn->isn_arg.number = count;
return OK;
}
/*
* Generate ISN_RANGE. Consumes "range". Return OK/FAIL.
*/
static int
generate_RANGE(cctx_T *cctx, char_u *range)
{
isn_T *isn;
garray_T *stack = &cctx->ctx_type_stack;
if ((isn = generate_instr(cctx, ISN_RANGE)) == NULL)
return FAIL;
isn->isn_arg.string = range;
if (ga_grow(stack, 1) == FAIL)
return FAIL;
((type_T **)stack->ga_data)[stack->ga_len] = &t_number;
++stack->ga_len;
return OK;
}
static int
generate_UNPACK(cctx_T *cctx, int var_count, int semicolon)
{
isn_T *isn;
RETURN_OK_IF_SKIP(cctx);
if ((isn = generate_instr(cctx, ISN_UNPACK)) == NULL)
return FAIL;
isn->isn_arg.unpack.unp_count = var_count;
isn->isn_arg.unpack.unp_semicolon = semicolon;
return OK;
}
/*
* Generate an instruction for any command modifiers.
*/
static int
generate_cmdmods(cctx_T *cctx, cmdmod_T *cmod)
{
isn_T *isn;
if (has_cmdmod(cmod))
{
cctx->ctx_has_cmdmod = TRUE;
if ((isn = generate_instr(cctx, ISN_CMDMOD)) == NULL)
return FAIL;
isn->isn_arg.cmdmod.cf_cmdmod = ALLOC_ONE(cmdmod_T);
if (isn->isn_arg.cmdmod.cf_cmdmod == NULL)
return FAIL;
mch_memmove(isn->isn_arg.cmdmod.cf_cmdmod, cmod, sizeof(cmdmod_T));
// filter program now belongs to the instruction
cmod->cmod_filter_regmatch.regprog = NULL;
}
return OK;
}
static int
generate_undo_cmdmods(cctx_T *cctx)
{
if (cctx->ctx_has_cmdmod && generate_instr(cctx, ISN_CMDMOD_REV) == NULL)
return FAIL;
cctx->ctx_has_cmdmod = FALSE;
return OK;
}
static int
misplaced_cmdmod(cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
if (cctx->ctx_has_cmdmod
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1].isn_type
== ISN_CMDMOD)
{
emsg(_(e_misplaced_command_modifier));
return TRUE;
}
return FALSE;
}
/*
* Get the index of the current instruction.
* This compenstates for a preceding ISN_CMDMOD and ISN_PROF_START.
*/
static int
current_instr_idx(cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
int idx = instr->ga_len;
while (idx > 0)
{
if (cctx->ctx_has_cmdmod && ((isn_T *)instr->ga_data)[idx - 1]
.isn_type == ISN_CMDMOD)
{
--idx;
continue;
}
#ifdef FEAT_PROFILE
if (((isn_T *)instr->ga_data)[idx - 1].isn_type == ISN_PROF_START)
{
--idx;
continue;
}
#endif
if (((isn_T *)instr->ga_data)[idx - 1].isn_type == ISN_DEBUG)
{
--idx;
continue;
}
break;
}
return idx;
}
#ifdef FEAT_PROFILE
static void
may_generate_prof_end(cctx_T *cctx, int prof_lnum)
{
if (cctx->ctx_compile_type == CT_PROFILE && prof_lnum >= 0)
generate_instr(cctx, ISN_PROF_END);
}
#endif
/*
* Reserve space for a local variable.
* Return the variable or NULL if it failed.
*/
static lvar_T *
reserve_local(
cctx_T *cctx,
char_u *name,
size_t len,
int isConst,
type_T *type)
{
lvar_T *lvar;
dfunc_T *dfunc;
if (arg_exists(name, len, NULL, NULL, NULL, cctx) == OK)
{
emsg_namelen(_(e_str_is_used_as_argument), name, (int)len);
return NULL;
}
if (ga_grow(&cctx->ctx_locals, 1) == FAIL)
return NULL;
lvar = ((lvar_T *)cctx->ctx_locals.ga_data) + cctx->ctx_locals.ga_len++;
CLEAR_POINTER(lvar);
// Every local variable uses the next entry on the stack. We could re-use
// the last ones when leaving a scope, but then variables used in a closure
// might get overwritten. To keep things simple do not re-use stack
// entries. This is less efficient, but memory is cheap these days.
dfunc = ((dfunc_T *)def_functions.ga_data) + cctx->ctx_ufunc->uf_dfunc_idx;
lvar->lv_idx = dfunc->df_var_names.ga_len;
lvar->lv_name = vim_strnsave(name, len == 0 ? STRLEN(name) : len);
lvar->lv_const = isConst;
lvar->lv_type = type;
// Remember the name for debugging.
if (ga_grow(&dfunc->df_var_names, 1) == FAIL)
return NULL;
((char_u **)dfunc->df_var_names.ga_data)[lvar->lv_idx] =
vim_strsave(lvar->lv_name);
++dfunc->df_var_names.ga_len;
return lvar;
}
/*
* Remove local variables above "new_top".
*/
static void
unwind_locals(cctx_T *cctx, int new_top)
{
if (cctx->ctx_locals.ga_len > new_top)
{
int idx;
lvar_T *lvar;
for (idx = new_top; idx < cctx->ctx_locals.ga_len; ++idx)
{
lvar = ((lvar_T *)cctx->ctx_locals.ga_data) + idx;
vim_free(lvar->lv_name);
}
}
cctx->ctx_locals.ga_len = new_top;
}
/*
* Free all local variables.
*/
static void
free_locals(cctx_T *cctx)
{
unwind_locals(cctx, 0);
ga_clear(&cctx->ctx_locals);
}
/*
* If "check_writable" is ASSIGN_CONST give an error if the variable was
* defined with :final or :const, if "check_writable" is ASSIGN_FINAL give an
* error if the variable was defined with :const.
*/
static int
check_item_writable(svar_T *sv, int check_writable, char_u *name)
{
if ((check_writable == ASSIGN_CONST && sv->sv_const != 0)
|| (check_writable == ASSIGN_FINAL
&& sv->sv_const == ASSIGN_CONST))
{
semsg(_(e_readonlyvar), name);
return FAIL;
}
return OK;
}
/*
* Find "name" in script-local items of script "sid".
* Pass "check_writable" to check_item_writable().
* Returns the index in "sn_var_vals" if found.
* If found but not in "sn_var_vals" returns -1.
* If not found or the variable is not writable returns -2.
*/
int
get_script_item_idx(int sid, char_u *name, int check_writable, cctx_T *cctx)
{
hashtab_T *ht;
dictitem_T *di;
scriptitem_T *si = SCRIPT_ITEM(sid);
svar_T *sv;
int idx;
if (!SCRIPT_ID_VALID(sid))
return -1;
if (sid == current_sctx.sc_sid)
{
sallvar_T *sav = find_script_var(name, 0, cctx);
if (sav == NULL)
return -2;
idx = sav->sav_var_vals_idx;
sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
if (check_item_writable(sv, check_writable, name) == FAIL)
return -2;
return idx;
}
// First look the name up in the hashtable.
ht = &SCRIPT_VARS(sid);
di = find_var_in_ht(ht, 0, name, TRUE);
if (di == NULL)
return -2;
// Now find the svar_T index in sn_var_vals.
for (idx = 0; idx < si->sn_var_vals.ga_len; ++idx)
{
sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
if (sv->sv_tv == &di->di_tv)
{
if (check_item_writable(sv, check_writable, name) == FAIL)
return -2;
return idx;
}
}
return -1;
}
/*
* Find "name" in imported items of the current script or in "cctx" if not
* NULL.
*/
imported_T *
find_imported(char_u *name, size_t len, cctx_T *cctx)
{
int idx;
if (!SCRIPT_ID_VALID(current_sctx.sc_sid))
return NULL;
if (cctx != NULL)
for (idx = 0; idx < cctx->ctx_imports.ga_len; ++idx)
{
imported_T *import = ((imported_T *)cctx->ctx_imports.ga_data)
+ idx;
if (len == 0 ? STRCMP(name, import->imp_name) == 0
: STRLEN(import->imp_name) == len
&& STRNCMP(name, import->imp_name, len) == 0)
return import;
}
return find_imported_in_script(name, len, current_sctx.sc_sid);
}
imported_T *
find_imported_in_script(char_u *name, size_t len, int sid)
{
scriptitem_T *si;
int idx;
if (!SCRIPT_ID_VALID(sid))
return NULL;
si = SCRIPT_ITEM(sid);
for (idx = 0; idx < si->sn_imports.ga_len; ++idx)
{
imported_T *import = ((imported_T *)si->sn_imports.ga_data) + idx;
if (len == 0 ? STRCMP(name, import->imp_name) == 0
: STRLEN(import->imp_name) == len
&& STRNCMP(name, import->imp_name, len) == 0)
return import;
}
return NULL;
}
/*
* Free all imported variables.
*/
static void
free_imported(cctx_T *cctx)
{
int idx;
for (idx = 0; idx < cctx->ctx_imports.ga_len; ++idx)
{
imported_T *import = ((imported_T *)cctx->ctx_imports.ga_data) + idx;
vim_free(import->imp_name);
}
ga_clear(&cctx->ctx_imports);
}
/*
* Return a pointer to the next line that isn't empty or only contains a
* comment. Skips over white space.
* Returns NULL if there is none.
*/
char_u *
peek_next_line_from_context(cctx_T *cctx)
{
int lnum = cctx->ctx_lnum;
while (++lnum < cctx->ctx_ufunc->uf_lines.ga_len)
{
char_u *line = ((char_u **)cctx->ctx_ufunc->uf_lines.ga_data)[lnum];
char_u *p;
// ignore NULLs inserted for continuation lines
if (line != NULL)
{
p = skipwhite(line);
if (vim9_bad_comment(p))
return NULL;
if (*p != NUL && !vim9_comment_start(p))
return p;
}
}
return NULL;
}
/*
* Called when checking for a following operator at "arg". When the rest of
* the line is empty or only a comment, peek the next line. If there is a next
* line return a pointer to it and set "nextp".
* Otherwise skip over white space.
*/
static char_u *
may_peek_next_line(cctx_T *cctx, char_u *arg, char_u **nextp)
{
char_u *p = skipwhite(arg);
*nextp = NULL;
if (*p == NUL || (VIM_ISWHITE(*arg) && vim9_comment_start(p)))
{
*nextp = peek_next_line_from_context(cctx);
if (*nextp != NULL)
return *nextp;
}
return p;
}
/*
* Get the next line of the function from "cctx".
* Skips over empty lines. Skips over comment lines if "skip_comment" is TRUE.
* Returns NULL when at the end.
*/
char_u *
next_line_from_context(cctx_T *cctx, int skip_comment)
{
char_u *line;
do
{
++cctx->ctx_lnum;
if (cctx->ctx_lnum >= cctx->ctx_ufunc->uf_lines.ga_len)
{
line = NULL;
break;
}
line = ((char_u **)cctx->ctx_ufunc->uf_lines.ga_data)[cctx->ctx_lnum];
cctx->ctx_line_start = line;
SOURCING_LNUM = cctx->ctx_lnum + 1;
} while (line == NULL || *skipwhite(line) == NUL
|| (skip_comment && vim9_comment_start(skipwhite(line))));
return line;
}
/*
* Skip over white space at "whitep" and assign to "*arg".
* If "*arg" is at the end of the line, advance to the next line.
* Also when "whitep" points to white space and "*arg" is on a "#".
* Return FAIL if beyond the last line, "*arg" is unmodified then.
*/
static int
may_get_next_line(char_u *whitep, char_u **arg, cctx_T *cctx)
{
*arg = skipwhite(whitep);
if (vim9_bad_comment(*arg))
return FAIL;
if (**arg == NUL || (VIM_ISWHITE(*whitep) && vim9_comment_start(*arg)))
{
char_u *next = next_line_from_context(cctx, TRUE);
if (next == NULL)
return FAIL;
*arg = skipwhite(next);
}
return OK;
}
/*
* Idem, and give an error when failed.
*/
static int
may_get_next_line_error(char_u *whitep, char_u **arg, cctx_T *cctx)
{
if (may_get_next_line(whitep, arg, cctx) == FAIL)
{
SOURCING_LNUM = cctx->ctx_lnum + 1;
emsg(_(e_line_incomplete));
return FAIL;
}
return OK;
}
// Structure passed between the compile_expr* functions to keep track of
// constants that have been parsed but for which no code was produced yet. If
// possible expressions on these constants are applied at compile time. If
// that is not possible, the code to push the constants needs to be generated
// before other instructions.
// Using 50 should be more than enough of 5 levels of ().
#define PPSIZE 50
typedef struct {
typval_T pp_tv[PPSIZE]; // stack of ppconst constants
int pp_used; // active entries in pp_tv[]
int pp_is_const; // all generated code was constants, used for a
// list or dict with constant members
} ppconst_T;
static int compile_expr0_ext(char_u **arg, cctx_T *cctx, int *is_const);
static int compile_expr0(char_u **arg, cctx_T *cctx);
static int compile_expr1(char_u **arg, cctx_T *cctx, ppconst_T *ppconst);
/*
* Generate a PUSH instruction for "tv".
* "tv" will be consumed or cleared.
* Nothing happens if "tv" is NULL or of type VAR_UNKNOWN;
*/
static int
generate_tv_PUSH(cctx_T *cctx, typval_T *tv)
{
if (tv != NULL)
{
switch (tv->v_type)
{
case VAR_UNKNOWN:
break;
case VAR_BOOL:
generate_PUSHBOOL(cctx, tv->vval.v_number);
break;
case VAR_SPECIAL:
generate_PUSHSPEC(cctx, tv->vval.v_number);
break;
case VAR_NUMBER:
generate_PUSHNR(cctx, tv->vval.v_number);
break;
#ifdef FEAT_FLOAT
case VAR_FLOAT:
generate_PUSHF(cctx, tv->vval.v_float);
break;
#endif
case VAR_BLOB:
generate_PUSHBLOB(cctx, tv->vval.v_blob);
tv->vval.v_blob = NULL;
break;
case VAR_STRING:
generate_PUSHS(cctx, tv->vval.v_string);
tv->vval.v_string = NULL;
break;
default:
iemsg("constant type not supported");
clear_tv(tv);
return FAIL;
}
tv->v_type = VAR_UNKNOWN;
}
return OK;
}
/*
* Generate code for any ppconst entries.
*/
static int
generate_ppconst(cctx_T *cctx, ppconst_T *ppconst)
{
int i;
int ret = OK;
int save_skip = cctx->ctx_skip;
cctx->ctx_skip = SKIP_NOT;
for (i = 0; i < ppconst->pp_used; ++i)
if (generate_tv_PUSH(cctx, &ppconst->pp_tv[i]) == FAIL)
ret = FAIL;
ppconst->pp_used = 0;
cctx->ctx_skip = save_skip;
return ret;
}
/*
* Clear ppconst constants. Used when failing.
*/
static void
clear_ppconst(ppconst_T *ppconst)
{
int i;
for (i = 0; i < ppconst->pp_used; ++i)
clear_tv(&ppconst->pp_tv[i]);
ppconst->pp_used = 0;
}
/*
* Compile getting a member from a list/dict/string/blob. Stack has the
* indexable value and the index or the two indexes of a slice.
*/
static int
compile_member(int is_slice, cctx_T *cctx)
{
type_T **typep;
garray_T *stack = &cctx->ctx_type_stack;
vartype_T vartype;
type_T *idxtype;
// We can index a list, dict and blob. If we don't know the type
// we can use the index value type. If we still don't know use an "ANY"
// instruction.
typep = ((type_T **)stack->ga_data) + stack->ga_len
- (is_slice ? 3 : 2);
vartype = (*typep)->tt_type;
idxtype = ((type_T **)stack->ga_data)[stack->ga_len - 1];
// If the index is a string, the variable must be a Dict.
if (*typep == &t_any && idxtype == &t_string)
vartype = VAR_DICT;
if (vartype == VAR_STRING || vartype == VAR_LIST || vartype == VAR_BLOB)
{
if (need_type(idxtype, &t_number, -1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
if (is_slice)
{
idxtype = ((type_T **)stack->ga_data)[stack->ga_len - 2];
if (need_type(idxtype, &t_number, -2, 0, cctx,
FALSE, FALSE) == FAIL)
return FAIL;
}
}
if (vartype == VAR_DICT)
{
if (is_slice)
{
emsg(_(e_cannot_slice_dictionary));
return FAIL;
}
if ((*typep)->tt_type == VAR_DICT)
{
*typep = (*typep)->tt_member;
if (*typep == &t_unknown)
// empty dict was used
*typep = &t_any;
}
else
{
if (need_type(*typep, &t_dict_any, -2, 0, cctx,
FALSE, FALSE) == FAIL)
return FAIL;
*typep = &t_any;
}
if (may_generate_2STRING(-1, FALSE, cctx) == FAIL)
return FAIL;
if (generate_instr_drop(cctx, ISN_MEMBER, 1) == FAIL)
return FAIL;
}
else if (vartype == VAR_STRING)
{
*typep = &t_string;
if ((is_slice
? generate_instr_drop(cctx, ISN_STRSLICE, 2)
: generate_instr_drop(cctx, ISN_STRINDEX, 1)) == FAIL)
return FAIL;
}
else if (vartype == VAR_BLOB)
{
if (is_slice)
{
*typep = &t_blob;
if (generate_instr_drop(cctx, ISN_BLOBSLICE, 2) == FAIL)
return FAIL;
}
else
{
*typep = &t_number;
if (generate_instr_drop(cctx, ISN_BLOBINDEX, 1) == FAIL)
return FAIL;
}
}
else if (vartype == VAR_LIST || *typep == &t_any)
{
if (is_slice)
{
if (generate_instr_drop(cctx,
vartype == VAR_LIST ? ISN_LISTSLICE : ISN_ANYSLICE,
2) == FAIL)
return FAIL;
}
else
{
if ((*typep)->tt_type == VAR_LIST)
{
*typep = (*typep)->tt_member;
if (*typep == &t_unknown)
// empty list was used
*typep = &t_any;
}
if (generate_instr_drop(cctx,
vartype == VAR_LIST ? ISN_LISTINDEX : ISN_ANYINDEX, 1)
== FAIL)
return FAIL;
}
}
else
{
emsg(_(e_string_list_dict_or_blob_required));
return FAIL;
}
return OK;
}
/*
* Generate an instruction to load script-local variable "name", without the
* leading "s:".
* Also finds imported variables.
*/
static int
compile_load_scriptvar(
cctx_T *cctx,
char_u *name, // variable NUL terminated
char_u *start, // start of variable
char_u **end, // end of variable
int error) // when TRUE may give error
{
scriptitem_T *si;
int idx;
imported_T *import;
if (!SCRIPT_ID_VALID(current_sctx.sc_sid))
return FAIL;
si = SCRIPT_ITEM(current_sctx.sc_sid);
idx = get_script_item_idx(current_sctx.sc_sid, name, 0, cctx);
if (idx == -1 || si->sn_version != SCRIPT_VERSION_VIM9)
{
// variable is not in sn_var_vals: old style script.
return generate_OLDSCRIPT(cctx, ISN_LOADS, name, current_sctx.sc_sid,
&t_any);
}
if (idx >= 0)
{
svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
current_sctx.sc_sid, idx, sv->sv_type);
return OK;
}
import = find_imported(name, 0, cctx);
if (import != NULL)
{
if (import->imp_flags & IMP_FLAGS_STAR)
{
char_u *p = skipwhite(*end);
char_u *exp_name;
int cc;
ufunc_T *ufunc;
type_T *type;
// Used "import * as Name", need to lookup the member.
if (*p != '.')
{
semsg(_(e_expected_dot_after_name_str), start);
return FAIL;
}
++p;
if (VIM_ISWHITE(*p))
{
emsg(_(e_no_white_space_allowed_after_dot));
return FAIL;
}
// isolate one name
exp_name = p;
while (eval_isnamec(*p))
++p;
cc = *p;
*p = NUL;
idx = find_exported(import->imp_sid, exp_name, &ufunc, &type,
cctx, TRUE);
*p = cc;
p = skipwhite(p);
*end = p;
if (idx < 0)
{
if (*p == '(' && ufunc != NULL)
{
generate_PUSHFUNC(cctx, ufunc->uf_name, import->imp_type);
return OK;
}
return FAIL;
}
generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
import->imp_sid,
idx,
type);
}
else if (import->imp_funcname != NULL)
generate_PUSHFUNC(cctx, import->imp_funcname, import->imp_type);
else
generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
import->imp_sid,
import->imp_var_vals_idx,
import->imp_type);
return OK;
}
if (error)
semsg(_(e_item_not_found_str), name);
return FAIL;
}
static int
generate_funcref(cctx_T *cctx, char_u *name)
{
ufunc_T *ufunc = find_func(name, FALSE, cctx);
if (ufunc == NULL)
return FAIL;
// Need to compile any default values to get the argument types.
if (func_needs_compiling(ufunc, COMPILE_TYPE(ufunc))
&& compile_def_function(ufunc, TRUE, COMPILE_TYPE(ufunc), NULL)
== FAIL)
return FAIL;
return generate_PUSHFUNC(cctx, ufunc->uf_name, ufunc->uf_func_type);
}
/*
* Compile a variable name into a load instruction.
* "end" points to just after the name.
* "is_expr" is TRUE when evaluating an expression, might be a funcref.
* When "error" is FALSE do not give an error when not found.
*/
static int
compile_load(
char_u **arg,
char_u *end_arg,
cctx_T *cctx,
int is_expr,
int error)
{
type_T *type;
char_u *name = NULL;
char_u *end = end_arg;
int res = FAIL;
int prev_called_emsg = called_emsg;
if (*(*arg + 1) == ':')
{
if (end <= *arg + 2)
{
isntype_T isn_type;
// load dictionary of namespace
switch (**arg)
{
case 'g': isn_type = ISN_LOADGDICT; break;
case 'w': isn_type = ISN_LOADWDICT; break;
case 't': isn_type = ISN_LOADTDICT; break;
case 'b': isn_type = ISN_LOADBDICT; break;
default:
semsg(_(e_namespace_not_supported_str), *arg);
goto theend;
}
if (generate_instr_type(cctx, isn_type, &t_dict_any) == NULL)
goto theend;
res = OK;
}
else
{
isntype_T isn_type = ISN_DROP;
// load namespaced variable
name = vim_strnsave(*arg + 2, end - (*arg + 2));
if (name == NULL)
return FAIL;
switch (**arg)
{
case 'v': res = generate_LOADV(cctx, name, error);
break;
case 's': if (is_expr && ASCII_ISUPPER(*name)
&& find_func(name, FALSE, cctx) != NULL)
res = generate_funcref(cctx, name);
else
res = compile_load_scriptvar(cctx, name,
NULL, &end, error);
break;
case 'g': if (vim_strchr(name, AUTOLOAD_CHAR) == NULL)
{
if (is_expr && ASCII_ISUPPER(*name)
&& find_func(name, FALSE, cctx) != NULL)
res = generate_funcref(cctx, name);
else
isn_type = ISN_LOADG;
}
else
{
isn_type = ISN_LOADAUTO;
vim_free(name);
name = vim_strnsave(*arg, end - *arg);
if (name == NULL)
return FAIL;
}
break;
case 'w': isn_type = ISN_LOADW; break;
case 't': isn_type = ISN_LOADT; break;
case 'b': isn_type = ISN_LOADB; break;
default: // cannot happen, just in case
semsg(_(e_namespace_not_supported_str), *arg);
goto theend;
}
if (isn_type != ISN_DROP)
{
// Global, Buffer-local, Window-local and Tabpage-local
// variables can be defined later, thus we don't check if it
// exists, give an error at runtime.
res = generate_LOAD(cctx, isn_type, 0, name, &t_any);
}
}
}
else
{
size_t len = end - *arg;
int idx;
int gen_load = FALSE;
int gen_load_outer = 0;
name = vim_strnsave(*arg, end - *arg);
if (name == NULL)
return FAIL;
if (vim_strchr(name, AUTOLOAD_CHAR) != NULL)
{
script_autoload(name, FALSE);
res = generate_LOAD(cctx, ISN_LOADAUTO, 0, name, &t_any);
}
else if (arg_exists(*arg, len, &idx, &type, &gen_load_outer, cctx)
== OK)
{
if (gen_load_outer == 0)
gen_load = TRUE;
}
else
{
lvar_T lvar;
if (lookup_local(*arg, len, &lvar, cctx) == OK)
{
type = lvar.lv_type;
idx = lvar.lv_idx;
if (lvar.lv_from_outer != 0)
gen_load_outer = lvar.lv_from_outer;
else
gen_load = TRUE;
}
else
{
// "var" can be script-local even without using "s:" if it
// already exists in a Vim9 script or when it's imported.
if (script_var_exists(*arg, len, cctx) == OK
|| find_imported(name, 0, cctx) != NULL)
res = compile_load_scriptvar(cctx, name, *arg, &end, FALSE);
// When evaluating an expression and the name starts with an
// uppercase letter it can be a user defined function.
// generate_funcref() will fail if the function can't be found.
if (res == FAIL && is_expr && ASCII_ISUPPER(*name))
res = generate_funcref(cctx, name);
}
}
if (gen_load)
res = generate_LOAD(cctx, ISN_LOAD, idx, NULL, type);
if (gen_load_outer > 0)
{
res = generate_LOADOUTER(cctx, idx, gen_load_outer, type);
cctx->ctx_outer_used = TRUE;
}
}
*arg = end;
theend:
if (res == FAIL && error && called_emsg == prev_called_emsg)
semsg(_(e_variable_not_found_str), name);
vim_free(name);
return res;
}
static void
clear_instr_ga(garray_T *gap)
{
int idx;
for (idx = 0; idx < gap->ga_len; ++idx)
delete_instr(((isn_T *)gap->ga_data) + idx);
ga_clear(gap);
}
/*
* Compile a string in a ISN_PUSHS instruction into an ISN_INSTR.
* Returns FAIL if compilation fails.
*/
static int
compile_string(isn_T *isn, cctx_T *cctx)
{
char_u *s = isn->isn_arg.string;
garray_T save_ga = cctx->ctx_instr;
int expr_res;
int trailing_error;
int instr_count;
isn_T *instr = NULL;
// Temporarily reset the list of instructions so that the jump labels are
// correct.
cctx->ctx_instr.ga_len = 0;
cctx->ctx_instr.ga_maxlen = 0;
cctx->ctx_instr.ga_data = NULL;
expr_res = compile_expr0(&s, cctx);
s = skipwhite(s);
trailing_error = *s != NUL;
if (expr_res == FAIL || trailing_error
|| ga_grow(&cctx->ctx_instr, 1) == FAIL)
{
if (trailing_error)
semsg(_(e_trailing_arg), s);
clear_instr_ga(&cctx->ctx_instr);
cctx->ctx_instr = save_ga;
return FAIL;
}
// Move the generated instructions into the ISN_INSTR instruction, then
// restore the list of instructions.
instr_count = cctx->ctx_instr.ga_len;
instr = cctx->ctx_instr.ga_data;
instr[instr_count].isn_type = ISN_FINISH;
cctx->ctx_instr = save_ga;
vim_free(isn->isn_arg.string);
isn->isn_type = ISN_INSTR;
isn->isn_arg.instr = instr;
return OK;
}
/*
* Compile the argument expressions.
* "arg" points to just after the "(" and is advanced to after the ")"
*/
static int
compile_arguments(char_u **arg, cctx_T *cctx, int *argcount, int is_searchpair)
{
char_u *p = *arg;
char_u *whitep = *arg;
int must_end = FALSE;
int instr_count;
for (;;)
{
if (may_get_next_line(whitep, &p, cctx) == FAIL)
goto failret;
if (*p == ')')
{
*arg = p + 1;
return OK;
}
if (must_end)
{
semsg(_(e_missing_comma_before_argument_str), p);
return FAIL;
}
instr_count = cctx->ctx_instr.ga_len;
if (compile_expr0(&p, cctx) == FAIL)
return FAIL;
++*argcount;
if (is_searchpair && *argcount >= 5
&& cctx->ctx_instr.ga_len == instr_count + 1)
{
isn_T *isn = ((isn_T *)cctx->ctx_instr.ga_data) + instr_count;
// {skip} argument of searchpair() can be compiled if not empty
if (isn->isn_type == ISN_PUSHS && *isn->isn_arg.string != NUL)
compile_string(isn, cctx);
}
if (*p != ',' && *skipwhite(p) == ',')
{
semsg(_(e_no_white_space_allowed_before_str_str), ",", p);
p = skipwhite(p);
}
if (*p == ',')
{
++p;
if (*p != NUL && !VIM_ISWHITE(*p))
semsg(_(e_white_space_required_after_str_str), ",", p - 1);
}
else
must_end = TRUE;
whitep = p;
p = skipwhite(p);
}
failret:
emsg(_(e_missing_close));
return FAIL;
}
/*
* Compile a function call: name(arg1, arg2)
* "arg" points to "name", "arg + varlen" to the "(".
* "argcount_init" is 1 for "value->method()"
* Instructions:
* EVAL arg1
* EVAL arg2
* BCALL / DCALL / UCALL
*/
static int
compile_call(
char_u **arg,
size_t varlen,
cctx_T *cctx,
ppconst_T *ppconst,
int argcount_init)
{
char_u *name = *arg;
char_u *p;
int argcount = argcount_init;
char_u namebuf[100];
char_u fname_buf[FLEN_FIXED + 1];
char_u *tofree = NULL;
int error = FCERR_NONE;
ufunc_T *ufunc = NULL;
int res = FAIL;
int is_autoload;
int is_searchpair;
// we can evaluate "has('name')" at compile time
if (varlen == 3 && STRNCMP(*arg, "has", 3) == 0)
{
char_u *s = skipwhite(*arg + varlen + 1);
typval_T argvars[2];
argvars[0].v_type = VAR_UNKNOWN;
if (*s == '"')
(void)eval_string(&s, &argvars[0], TRUE);
else if (*s == '\'')
(void)eval_lit_string(&s, &argvars[0], TRUE);
s = skipwhite(s);
if (*s == ')' && argvars[0].v_type == VAR_STRING
&& !dynamic_feature(argvars[0].vval.v_string))
{
typval_T *tv = &ppconst->pp_tv[ppconst->pp_used];
*arg = s + 1;
argvars[1].v_type = VAR_UNKNOWN;
tv->v_type = VAR_NUMBER;
tv->vval.v_number = 0;
f_has(argvars, tv);
clear_tv(&argvars[0]);
++ppconst->pp_used;
return OK;
}
clear_tv(&argvars[0]);
}
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
if (varlen >= sizeof(namebuf))
{
semsg(_(e_name_too_long_str), name);
return FAIL;
}
vim_strncpy(namebuf, *arg, varlen);
name = fname_trans_sid(namebuf, fname_buf, &tofree, &error);
// We handle the "skip" argument of searchpair() and searchpairpos()
// differently.
is_searchpair = (varlen == 6 && STRNCMP(*arg, "search", 6) == 0)
|| (varlen == 9 && STRNCMP(*arg, "searchpos", 9) == 0)
|| (varlen == 10 && STRNCMP(*arg, "searchpair", 10) == 0)
|| (varlen == 13 && STRNCMP(*arg, "searchpairpos", 13) == 0);
*arg = skipwhite(*arg + varlen + 1);
if (compile_arguments(arg, cctx, &argcount, is_searchpair) == FAIL)
goto theend;
is_autoload = vim_strchr(name, AUTOLOAD_CHAR) != NULL;
if (ASCII_ISLOWER(*name) && name[1] != ':' && !is_autoload)
{
int idx;
// builtin function
idx = find_internal_func(name);
if (idx >= 0)
{
if (STRCMP(name, "flatten") == 0)
{
emsg(_(e_cannot_use_flatten_in_vim9_script));
goto theend;
}
if (STRCMP(name, "add") == 0 && argcount == 2)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *type = ((type_T **)stack->ga_data)[
stack->ga_len - 2];
// add() can be compiled to instructions if we know the type
if (type->tt_type == VAR_LIST)
{
// inline "add(list, item)" so that the type can be checked
res = generate_LISTAPPEND(cctx);
idx = -1;
}
else if (type->tt_type == VAR_BLOB)
{
// inline "add(blob, nr)" so that the type can be checked
res = generate_BLOBAPPEND(cctx);
idx = -1;
}
}
if (idx >= 0)
res = generate_BCALL(cctx, idx, argcount, argcount_init == 1);
}
else
semsg(_(e_unknownfunc), namebuf);
goto theend;
}
// An argument or local variable can be a function reference, this
// overrules a function name.
if (lookup_local(namebuf, varlen, NULL, cctx) == FAIL
&& arg_exists(namebuf, varlen, NULL, NULL, NULL, cctx) != OK)
{
// If we can find the function by name generate the right call.
// Skip global functions here, a local funcref takes precedence.
ufunc = find_func(name, FALSE, cctx);
if (ufunc != NULL && !func_is_global(ufunc))
{
res = generate_CALL(cctx, ufunc, argcount);
goto theend;
}
}
// If the name is a variable, load it and use PCALL.
// Not for g:Func(), we don't know if it is a variable or not.
// Not for eome#Func(), it will be loaded later.
p = namebuf;
if (STRNCMP(namebuf, "g:", 2) != 0 && !is_autoload
&& compile_load(&p, namebuf + varlen, cctx, FALSE, FALSE) == OK)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
res = generate_PCALL(cctx, argcount, namebuf, type, FALSE);
goto theend;
}
// If we can find a global function by name generate the right call.
if (ufunc != NULL)
{
res = generate_CALL(cctx, ufunc, argcount);
goto theend;
}
// A global function may be defined only later. Need to figure out at
// runtime. Also handles a FuncRef at runtime.
if (STRNCMP(namebuf, "g:", 2) == 0 || is_autoload)
res = generate_UCALL(cctx, name, argcount);
else
semsg(_(e_unknownfunc), namebuf);
theend:
vim_free(tofree);
return res;
}
// like NAMESPACE_CHAR but with 'a' and 'l'.
#define VIM9_NAMESPACE_CHAR (char_u *)"bgstvw"
/*
* Find the end of a variable or function name. Unlike find_name_end() this
* does not recognize magic braces.
* When "use_namespace" is TRUE recognize "b:", "s:", etc.
* Return a pointer to just after the name. Equal to "arg" if there is no
* valid name.
*/
char_u *
to_name_end(char_u *arg, int use_namespace)
{
char_u *p;
// Quick check for valid starting character.
if (!eval_isnamec1(*arg))
return arg;
for (p = arg + 1; *p != NUL && eval_isnamec(*p); MB_PTR_ADV(p))
// Include a namespace such as "s:var" and "v:var". But "n:" is not
// and can be used in slice "[n:]".
if (*p == ':' && (p != arg + 1
|| !use_namespace
|| vim_strchr(VIM9_NAMESPACE_CHAR, *arg) == NULL))
break;
return p;
}
/*
* Like to_name_end() but also skip over a list or dict constant.
* This intentionally does not handle line continuation.
*/
char_u *
to_name_const_end(char_u *arg)
{
char_u *p = to_name_end(arg, TRUE);
typval_T rettv;
if (p == arg && *arg == '[')
{
// Can be "[1, 2, 3]->Func()".
if (eval_list(&p, &rettv, NULL, FALSE) == FAIL)
p = arg;
}
return p;
}
/*
* parse a list: [expr, expr]
* "*arg" points to the '['.
* ppconst->pp_is_const is set if all items are a constant.
*/
static int
compile_list(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
char_u *p = skipwhite(*arg + 1);
char_u *whitep = *arg + 1;
int count = 0;
int is_const;
int is_all_const = TRUE; // reset when non-const encountered
for (;;)
{
if (may_get_next_line(whitep, &p, cctx) == FAIL)
{
semsg(_(e_list_end), *arg);
return FAIL;
}
if (*p == ',')
{
semsg(_(e_no_white_space_allowed_before_str_str), ",", p);
return FAIL;
}
if (*p == ']')
{
++p;
break;
}
if (compile_expr0_ext(&p, cctx, &is_const) == FAIL)
return FAIL;
if (!is_const)
is_all_const = FALSE;
++count;
if (*p == ',')
{
++p;
if (*p != ']' && !IS_WHITE_OR_NUL(*p))
{
semsg(_(e_white_space_required_after_str_str), ",", p - 1);
return FAIL;
}
}
whitep = p;
p = skipwhite(p);
}
*arg = p;
ppconst->pp_is_const = is_all_const;
return generate_NEWLIST(cctx, count);
}
/*
* Parse a lambda: "(arg, arg) => expr"
* "*arg" points to the '('.
* Returns OK/FAIL when a lambda is recognized, NOTDONE if it's not a lambda.
*/
static int
compile_lambda(char_u **arg, cctx_T *cctx)
{
int r;
typval_T rettv;
ufunc_T *ufunc;
evalarg_T evalarg;
CLEAR_FIELD(evalarg);
evalarg.eval_flags = EVAL_EVALUATE;
evalarg.eval_cctx = cctx;
// Get the funcref in "rettv".
r = get_lambda_tv(arg, &rettv, TRUE, &evalarg);
if (r != OK)
{
clear_evalarg(&evalarg, NULL);
return r;
}
// "rettv" will now be a partial referencing the function.
ufunc = rettv.vval.v_partial->pt_func;
++ufunc->uf_refcount;
clear_tv(&rettv);
// Compile it here to get the return type. The return type is optional,
// when it's missing use t_unknown. This is recognized in
// compile_return().
if (ufunc->uf_ret_type->tt_type == VAR_VOID)
ufunc->uf_ret_type = &t_unknown;
compile_def_function(ufunc, FALSE, cctx->ctx_compile_type, cctx);
// evalarg.eval_tofree_cmdline may have a copy of the last line and "*arg"
// points into it. Point to the original line to avoid a dangling pointer.
if (evalarg.eval_tofree_cmdline != NULL)
{
size_t off = *arg - evalarg.eval_tofree_cmdline;
*arg = ((char_u **)cctx->ctx_ufunc->uf_lines.ga_data)[cctx->ctx_lnum]
+ off;
}
clear_evalarg(&evalarg, NULL);
if (ufunc->uf_def_status == UF_COMPILED)
{
// The return type will now be known.
set_function_type(ufunc);
// The function reference count will be 1. When the ISN_FUNCREF
// instruction is deleted the reference count is decremented and the
// function is freed.
return generate_FUNCREF(cctx, ufunc);
}
func_ptr_unref(ufunc);
return FAIL;
}
/*
* parse a dict: {key: val, [key]: val}
* "*arg" points to the '{'.
* ppconst->pp_is_const is set if all item values are a constant.
*/
static int
compile_dict(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
garray_T *instr = &cctx->ctx_instr;
int count = 0;
dict_T *d = dict_alloc();
dictitem_T *item;
char_u *whitep = *arg + 1;
char_u *p;
int is_const;
int is_all_const = TRUE; // reset when non-const encountered
if (d == NULL)
return FAIL;
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
for (;;)
{
char_u *key = NULL;
if (may_get_next_line(whitep, arg, cctx) == FAIL)
{
*arg = NULL;
goto failret;
}
if (**arg == '}')
break;
if (**arg == '[')
{
isn_T *isn;
// {[expr]: value} uses an evaluated key.
*arg = skipwhite(*arg + 1);
if (compile_expr0(arg, cctx) == FAIL)
return FAIL;
isn = ((isn_T *)instr->ga_data) + instr->ga_len - 1;
if (isn->isn_type == ISN_PUSHNR)
{
char buf[NUMBUFLEN];
// Convert to string at compile time.
vim_snprintf(buf, NUMBUFLEN, "%lld", isn->isn_arg.number);
isn->isn_type = ISN_PUSHS;
isn->isn_arg.string = vim_strsave((char_u *)buf);
}
if (isn->isn_type == ISN_PUSHS)
key = isn->isn_arg.string;
else if (may_generate_2STRING(-1, FALSE, cctx) == FAIL)
return FAIL;
*arg = skipwhite(*arg);
if (**arg != ']')
{
emsg(_(e_missing_matching_bracket_after_dict_key));
return FAIL;
}
++*arg;
}
else
{
// {"name": value},
// {'name': value},
// {name: value} use "name" as a literal key
key = get_literal_key(arg);
if (key == NULL)
return FAIL;
if (generate_PUSHS(cctx, key) == FAIL)
return FAIL;
}
// Check for duplicate keys, if using string keys.
if (key != NULL)
{
item = dict_find(d, key, -1);
if (item != NULL)
{
semsg(_(e_duplicate_key), key);
goto failret;
}
item = dictitem_alloc(key);
if (item != NULL)
{
item->di_tv.v_type = VAR_UNKNOWN;
item->di_tv.v_lock = 0;
if (dict_add(d, item) == FAIL)
dictitem_free(item);
}
}
if (**arg != ':')
{
if (*skipwhite(*arg) == ':')
semsg(_(e_no_white_space_allowed_before_str_str), ":", *arg);
else
semsg(_(e_missing_dict_colon), *arg);
return FAIL;
}
whitep = *arg + 1;
if (!IS_WHITE_OR_NUL(*whitep))
{
semsg(_(e_white_space_required_after_str_str), ":", *arg);
return FAIL;
}
if (may_get_next_line(whitep, arg, cctx) == FAIL)
{
*arg = NULL;
goto failret;
}
if (compile_expr0_ext(arg, cctx, &is_const) == FAIL)
return FAIL;
if (!is_const)
is_all_const = FALSE;
++count;
whitep = *arg;
if (may_get_next_line(whitep, arg, cctx) == FAIL)
{
*arg = NULL;
goto failret;
}
if (**arg == '}')
break;
if (**arg != ',')
{
semsg(_(e_missing_dict_comma), *arg);
goto failret;
}
if (IS_WHITE_OR_NUL(*whitep))
{
semsg(_(e_no_white_space_allowed_before_str_str), ",", whitep);
return FAIL;
}
whitep = *arg + 1;
if (!IS_WHITE_OR_NUL(*whitep))
{
semsg(_(e_white_space_required_after_str_str), ",", *arg);
return FAIL;
}
*arg = skipwhite(whitep);
}
*arg = *arg + 1;
// Allow for following comment, after at least one space.
p = skipwhite(*arg);
if (VIM_ISWHITE(**arg) && vim9_comment_start(p))
*arg += STRLEN(*arg);
dict_unref(d);
ppconst->pp_is_const = is_all_const;
return generate_NEWDICT(cctx, count);
failret:
if (*arg == NULL)
{
semsg(_(e_missing_dict_end), _("[end of lines]"));
*arg = (char_u *)"";
}
dict_unref(d);
return FAIL;
}
/*
* Compile "&option".
*/
static int
compile_get_option(char_u **arg, cctx_T *cctx)
{
typval_T rettv;
char_u *start = *arg;
int ret;
// parse the option and get the current value to get the type.
rettv.v_type = VAR_UNKNOWN;
ret = eval_option(arg, &rettv, TRUE);
if (ret == OK)
{
// include the '&' in the name, eval_option() expects it.
char_u *name = vim_strnsave(start, *arg - start);
type_T *type = rettv.v_type == VAR_BOOL ? &t_bool
: rettv.v_type == VAR_NUMBER ? &t_number : &t_string;
ret = generate_LOAD(cctx, ISN_LOADOPT, 0, name, type);
vim_free(name);
}
clear_tv(&rettv);
return ret;
}
/*
* Compile "$VAR".
*/
static int
compile_get_env(char_u **arg, cctx_T *cctx)
{
char_u *start = *arg;
int len;
int ret;
char_u *name;
++*arg;
len = get_env_len(arg);
if (len == 0)
{
semsg(_(e_syntax_error_at_str), start - 1);
return FAIL;
}
// include the '$' in the name, eval_env_var() expects it.
name = vim_strnsave(start, len + 1);
ret = generate_LOAD(cctx, ISN_LOADENV, 0, name, &t_string);
vim_free(name);
return ret;
}
/*
* Compile "@r".
*/
static int
compile_get_register(char_u **arg, cctx_T *cctx)
{
int ret;
++*arg;
if (**arg == NUL)
{
semsg(_(e_syntax_error_at_str), *arg - 1);
return FAIL;
}
if (!valid_yank_reg(**arg, FALSE))
{
emsg_invreg(**arg);
return FAIL;
}
ret = generate_LOAD(cctx, ISN_LOADREG, **arg, NULL, &t_string);
++*arg;
return ret;
}
/*
* Apply leading '!', '-' and '+' to constant "rettv".
* When "numeric_only" is TRUE do not apply '!'.
*/
static int
apply_leader(typval_T *rettv, int numeric_only, char_u *start, char_u **end)
{
char_u *p = *end;
// this works from end to start
while (p > start)
{
--p;
if (*p == '-' || *p == '+')
{
// only '-' has an effect, for '+' we only check the type
#ifdef FEAT_FLOAT
if (rettv->v_type == VAR_FLOAT)
{
if (*p == '-')
rettv->vval.v_float = -rettv->vval.v_float;
}
else
#endif
{
varnumber_T val;
int error = FALSE;
// tv_get_number_chk() accepts a string, but we don't want that
// here
if (check_not_string(rettv) == FAIL)
return FAIL;
val = tv_get_number_chk(rettv, &error);
clear_tv(rettv);
if (error)
return FAIL;
if (*p == '-')
val = -val;
rettv->v_type = VAR_NUMBER;
rettv->vval.v_number = val;
}
}
else if (numeric_only)
{
++p;
break;
}
else if (*p == '!')
{
int v = tv2bool(rettv);
// '!' is permissive in the type.
clear_tv(rettv);
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = v ? VVAL_FALSE : VVAL_TRUE;
}
}
*end = p;
return OK;
}
/*
* Recognize v: variables that are constants and set "rettv".
*/
static void
get_vim_constant(char_u **arg, typval_T *rettv)
{
if (STRNCMP(*arg, "v:true", 6) == 0)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_TRUE;
*arg += 6;
}
else if (STRNCMP(*arg, "v:false", 7) == 0)
{
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_FALSE;
*arg += 7;
}
else if (STRNCMP(*arg, "v:null", 6) == 0)
{
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NULL;
*arg += 6;
}
else if (STRNCMP(*arg, "v:none", 6) == 0)
{
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NONE;
*arg += 6;
}
}
exprtype_T
get_compare_type(char_u *p, int *len, int *type_is)
{
exprtype_T type = EXPR_UNKNOWN;
int i;
switch (p[0])
{
case '=': if (p[1] == '=')
type = EXPR_EQUAL;
else if (p[1] == '~')
type = EXPR_MATCH;
break;
case '!': if (p[1] == '=')
type = EXPR_NEQUAL;
else if (p[1] == '~')
type = EXPR_NOMATCH;
break;
case '>': if (p[1] != '=')
{
type = EXPR_GREATER;
*len = 1;
}
else
type = EXPR_GEQUAL;
break;
case '<': if (p[1] != '=')
{
type = EXPR_SMALLER;
*len = 1;
}
else
type = EXPR_SEQUAL;
break;
case 'i': if (p[1] == 's')
{
// "is" and "isnot"; but not a prefix of a name
if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
*len = 5;
i = p[*len];
if (!isalnum(i) && i != '_')
{
type = *len == 2 ? EXPR_IS : EXPR_ISNOT;
*type_is = TRUE;
}
}
break;
}
return type;
}
/*
* Skip over an expression, ignoring most errors.
*/
static void
skip_expr_cctx(char_u **arg, cctx_T *cctx)
{
evalarg_T evalarg;
CLEAR_FIELD(evalarg);
evalarg.eval_cctx = cctx;
skip_expr(arg, &evalarg);
}
/*
* Compile code to apply '-', '+' and '!'.
* When "numeric_only" is TRUE do not apply '!'.
*/
static int
compile_leader(cctx_T *cctx, int numeric_only, char_u *start, char_u **end)
{
char_u *p = *end;
// this works from end to start
while (p > start)
{
--p;
while (VIM_ISWHITE(*p))
--p;
if (*p == '-' || *p == '+')
{
int negate = *p == '-';
isn_T *isn;
// TODO: check type
while (p > start && (p[-1] == '-' || p[-1] == '+'))
{
--p;
if (*p == '-')
negate = !negate;
}
// only '-' has an effect, for '+' we only check the type
if (negate)
isn = generate_instr(cctx, ISN_NEGATENR);
else
isn = generate_instr(cctx, ISN_CHECKNR);
if (isn == NULL)
return FAIL;
}
else if (numeric_only)
{
++p;
break;
}
else
{
int invert = *p == '!';
while (p > start && (p[-1] == '!' || VIM_ISWHITE(p[-1])))
{
if (p[-1] == '!')
invert = !invert;
--p;
}
if (generate_2BOOL(cctx, invert, -1) == FAIL)
return FAIL;
}
}
*end = p;
return OK;
}
/*
* Compile "(expression)": recursive!
* Return FAIL/OK.
*/
static int
compile_parenthesis(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
int ret;
char_u *p = *arg + 1;
if (may_get_next_line_error(p, arg, cctx) == FAIL)
return FAIL;
if (ppconst->pp_used <= PPSIZE - 10)
{
ret = compile_expr1(arg, cctx, ppconst);
}
else
{
// Not enough space in ppconst, flush constants.
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_expr0(arg, cctx);
}
if (may_get_next_line_error(*arg, arg, cctx) == FAIL)
return FAIL;
if (**arg == ')')
++*arg;
else if (ret == OK)
{
emsg(_(e_missing_close));
ret = FAIL;
}
return ret;
}
/*
* Compile whatever comes after "name" or "name()".
* Advances "*arg" only when something was recognized.
*/
static int
compile_subscript(
char_u **arg,
cctx_T *cctx,
char_u *start_leader,
char_u **end_leader,
ppconst_T *ppconst)
{
char_u *name_start = *end_leader;
for (;;)
{
char_u *p = skipwhite(*arg);
if (*p == NUL || (VIM_ISWHITE(**arg) && vim9_comment_start(p)))
{
char_u *next = peek_next_line_from_context(cctx);
// If a following line starts with "->{" or "->X" advance to that
// line, so that a line break before "->" is allowed.
// Also if a following line starts with ".x".
if (next != NULL &&
((next[0] == '-' && next[1] == '>'
&& (next[2] == '{'
|| ASCII_ISALPHA(*skipwhite(next + 2))))
|| (next[0] == '.' && eval_isdictc(next[1]))))
{
next = next_line_from_context(cctx, TRUE);
if (next == NULL)
return FAIL;
*arg = next;
p = skipwhite(*arg);
}
}
// Do not skip over white space to find the "(", "execute 'x' ()" is
// not a function call.
if (**arg == '(')
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
int argcount = 0;
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ppconst->pp_is_const = FALSE;
// funcref(arg)
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
*arg = skipwhite(p + 1);
if (compile_arguments(arg, cctx, &argcount, FALSE) == FAIL)
return FAIL;
if (generate_PCALL(cctx, argcount, name_start, type, TRUE) == FAIL)
return FAIL;
}
else if (*p == '-' && p[1] == '>')
{
char_u *pstart = p;
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ppconst->pp_is_const = FALSE;
// something->method()
// Apply the '!', '-' and '+' first:
// -1.0->func() works like (-1.0)->func()
if (compile_leader(cctx, TRUE, start_leader, end_leader) == FAIL)
return FAIL;
p += 2;
*arg = skipwhite(p);
// No line break supported right after "->".
if (**arg == '(')
{
int argcount = 1;
garray_T *stack = &cctx->ctx_type_stack;
int type_idx_start = stack->ga_len;
type_T *type;
int expr_isn_start = cctx->ctx_instr.ga_len;
int expr_isn_end;
int arg_isn_count;
// Funcref call: list->(Refs[2])(arg)
// or lambda: list->((arg) => expr)(arg)
//
// Fist compile the function expression.
if (compile_parenthesis(arg, cctx, ppconst) == FAIL)
return FAIL;
// Remember the next instruction index, where the instructions
// for arguments are being written.
expr_isn_end = cctx->ctx_instr.ga_len;
// Compile the arguments.
if (**arg != '(')
{
if (*skipwhite(*arg) == '(')
emsg(_(e_nowhitespace));
else
semsg(_(e_missing_paren), *arg);
return FAIL;
}
*arg = skipwhite(*arg + 1);
if (compile_arguments(arg, cctx, &argcount, FALSE) == FAIL)
return FAIL;
// Move the instructions for the arguments to before the
// instructions of the expression and move the type of the
// expression after the argument types. This is what ISN_PCALL
// expects.
stack = &cctx->ctx_type_stack;
arg_isn_count = cctx->ctx_instr.ga_len - expr_isn_end;
if (arg_isn_count > 0)
{
int expr_isn_count = expr_isn_end - expr_isn_start;
isn_T *isn = ALLOC_MULT(isn_T, expr_isn_count);
if (isn == NULL)
return FAIL;
mch_memmove(isn, ((isn_T *)cctx->ctx_instr.ga_data)
+ expr_isn_start,
sizeof(isn_T) * expr_isn_count);
mch_memmove(((isn_T *)cctx->ctx_instr.ga_data)
+ expr_isn_start,
((isn_T *)cctx->ctx_instr.ga_data) + expr_isn_end,
sizeof(isn_T) * arg_isn_count);
mch_memmove(((isn_T *)cctx->ctx_instr.ga_data)
+ expr_isn_start + arg_isn_count,
isn, sizeof(isn_T) * expr_isn_count);
vim_free(isn);
type = ((type_T **)stack->ga_data)[type_idx_start];
mch_memmove(((type_T **)stack->ga_data) + type_idx_start,
((type_T **)stack->ga_data) + type_idx_start + 1,
sizeof(type_T *)
* (stack->ga_len - type_idx_start - 1));
((type_T **)stack->ga_data)[stack->ga_len - 1] = type;
}
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (generate_PCALL(cctx, argcount,
(char_u *)"[expression]", type, FALSE) == FAIL)
return FAIL;
}
else
{
// method call: list->method()
p = *arg;
if (!eval_isnamec1(*p))
{
semsg(_(e_trailing_arg), pstart);
return FAIL;
}
if (ASCII_ISALPHA(*p) && p[1] == ':')
p += 2;
for ( ; eval_isnamec(*p); ++p)
;
if (*p != '(')
{
semsg(_(e_missing_paren), *arg);
return FAIL;
}
// TODO: base value may not be the first argument
if (compile_call(arg, p - *arg, cctx, ppconst, 1) == FAIL)
return FAIL;
}
}
else if (**arg == '[')
{
int is_slice = FALSE;
// list index: list[123]
// dict member: dict[key]
// string index: text[123]
// blob index: blob[123]
// TODO: more arguments
// TODO: recognize list or dict at runtime
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ppconst->pp_is_const = FALSE;
++p;
if (may_get_next_line_error(p, arg, cctx) == FAIL)
return FAIL;
if (**arg == ':')
{
// missing first index is equal to zero
generate_PUSHNR(cctx, 0);
}
else
{
if (compile_expr0(arg, cctx) == FAIL)
return FAIL;
if (**arg == ':')
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", *arg);
return FAIL;
}
if (may_get_next_line_error(*arg, arg, cctx) == FAIL)
return FAIL;
*arg = skipwhite(*arg);
}
if (**arg == ':')
{
is_slice = TRUE;
++*arg;
if (!IS_WHITE_OR_NUL(**arg) && **arg != ']')
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", *arg);
return FAIL;
}
if (may_get_next_line_error(*arg, arg, cctx) == FAIL)
return FAIL;
if (**arg == ']')
// missing second index is equal to end of string
generate_PUSHNR(cctx, -1);
else
{
if (compile_expr0(arg, cctx) == FAIL)
return FAIL;
if (may_get_next_line_error(*arg, arg, cctx) == FAIL)
return FAIL;
*arg = skipwhite(*arg);
}
}
if (**arg != ']')
{
emsg(_(e_missbrac));
return FAIL;
}
*arg = *arg + 1;
if (compile_member(is_slice, cctx) == FAIL)
return FAIL;
}
else if (*p == '.' && p[1] != '.')
{
// dictionary member: dict.name
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ppconst->pp_is_const = FALSE;
*arg = p + 1;
if (IS_WHITE_OR_NUL(**arg))
{
emsg(_(e_missing_name_after_dot));
return FAIL;
}
p = *arg;
if (eval_isdictc(*p))
while (eval_isnamec(*p))
MB_PTR_ADV(p);
if (p == *arg)
{
semsg(_(e_syntax_error_at_str), *arg);
return FAIL;
}
if (generate_STRINGMEMBER(cctx, *arg, p - *arg) == FAIL)
return FAIL;
*arg = p;
}
else
break;
}
// TODO - see handle_subscript():
// Turn "dict.Func" into a partial for "Func" bound to "dict".
// Don't do this when "Func" is already a partial that was bound
// explicitly (pt_auto is FALSE).
return OK;
}
/*
* Compile an expression at "*arg" and add instructions to "cctx->ctx_instr".
* "arg" is advanced until after the expression, skipping white space.
*
* If the value is a constant "ppconst->pp_used" will be non-zero.
* Before instructions are generated, any values in "ppconst" will generated.
*
* This is the compiling equivalent of eval1(), eval2(), etc.
*/
/*
* number number constant
* 0zFFFFFFFF Blob constant
* "string" string constant
* 'string' literal string constant
* &option-name option value
* @r register contents
* identifier variable value
* function() function call
* $VAR environment variable
* (expression) nested expression
* [expr, expr] List
* {key: val, [key]: val} Dictionary
*
* Also handle:
* ! in front logical NOT
* - in front unary minus
* + in front unary plus (ignored)
* trailing (arg) funcref/partial call
* trailing [] subscript in String or List
* trailing .name entry in Dictionary
* trailing ->name() method call
*/
static int
compile_expr7(
char_u **arg,
cctx_T *cctx,
ppconst_T *ppconst)
{
char_u *start_leader, *end_leader;
int ret = OK;
typval_T *rettv = &ppconst->pp_tv[ppconst->pp_used];
int used_before = ppconst->pp_used;
ppconst->pp_is_const = FALSE;
/*
* Skip '!', '-' and '+' characters. They are handled later.
*/
start_leader = *arg;
if (eval_leader(arg, TRUE) == FAIL)
return FAIL;
end_leader = *arg;
rettv->v_type = VAR_UNKNOWN;
switch (**arg)
{
/*
* Number constant.
*/
case '0': // also for blob starting with 0z
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.': if (eval_number(arg, rettv, TRUE, FALSE) == FAIL)
return FAIL;
// Apply "-" and "+" just before the number now, right to
// left. Matters especially when "->" follows. Stops at
// '!'.
if (apply_leader(rettv, TRUE,
start_leader, &end_leader) == FAIL)
{
clear_tv(rettv);
return FAIL;
}
break;
/*
* String constant: "string".
*/
case '"': if (eval_string(arg, rettv, TRUE) == FAIL)
return FAIL;
break;
/*
* Literal string constant: 'str''ing'.
*/
case '\'': if (eval_lit_string(arg, rettv, TRUE) == FAIL)
return FAIL;
break;
/*
* Constant Vim variable.
*/
case 'v': get_vim_constant(arg, rettv);
ret = NOTDONE;
break;
/*
* "true" constant
*/
case 't': if (STRNCMP(*arg, "true", 4) == 0
&& !eval_isnamec((*arg)[4]))
{
*arg += 4;
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_TRUE;
}
else
ret = NOTDONE;
break;
/*
* "false" constant
*/
case 'f': if (STRNCMP(*arg, "false", 5) == 0
&& !eval_isnamec((*arg)[5]))
{
*arg += 5;
rettv->v_type = VAR_BOOL;
rettv->vval.v_number = VVAL_FALSE;
}
else
ret = NOTDONE;
break;
/*
* "null" constant
*/
case 'n': if (STRNCMP(*arg, "null", 4) == 0
&& !eval_isnamec((*arg)[4]))
{
*arg += 4;
rettv->v_type = VAR_SPECIAL;
rettv->vval.v_number = VVAL_NULL;
}
else
ret = NOTDONE;
break;
/*
* List: [expr, expr]
*/
case '[': if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_list(arg, cctx, ppconst);
break;
/*
* Dictionary: {'key': val, 'key': val}
*/
case '{': if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_dict(arg, cctx, ppconst);
break;
/*
* Option value: &name
*/
case '&': if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_get_option(arg, cctx);
break;
/*
* Environment variable: $VAR.
*/
case '$': if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_get_env(arg, cctx);
break;
/*
* Register contents: @r.
*/
case '@': if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
ret = compile_get_register(arg, cctx);
break;
/*
* nested expression: (expression).
* lambda: (arg, arg) => expr
* funcref: (arg, arg) => { statement }
*/
case '(': // if compile_lambda returns NOTDONE then it must be (expr)
ret = compile_lambda(arg, cctx);
if (ret == NOTDONE)
ret = compile_parenthesis(arg, cctx, ppconst);
break;
default: ret = NOTDONE;
break;
}
if (ret == FAIL)
return FAIL;
if (rettv->v_type != VAR_UNKNOWN && used_before == ppconst->pp_used)
{
if (cctx->ctx_skip == SKIP_YES)
clear_tv(rettv);
else
// A constant expression can possibly be handled compile time,
// return the value instead of generating code.
++ppconst->pp_used;
}
else if (ret == NOTDONE)
{
char_u *p;
int r;
if (!eval_isnamec1(**arg))
{
if (!vim9_bad_comment(*arg))
{
if (ends_excmd(*skipwhite(*arg)))
semsg(_(e_empty_expression_str), *arg);
else
semsg(_(e_name_expected_str), *arg);
}
return FAIL;
}
// "name" or "name()"
p = to_name_end(*arg, TRUE);
if (p - *arg == (size_t)1 && **arg == '_')
{
emsg(_(e_cannot_use_underscore_here));
return FAIL;
}
if (*p == '(')
{
r = compile_call(arg, p - *arg, cctx, ppconst, 0);
}
else
{
if (generate_ppconst(cctx, ppconst) == FAIL)
return FAIL;
r = compile_load(arg, p, cctx, TRUE, TRUE);
}
if (r == FAIL)
return FAIL;
}
// Handle following "[]", ".member", etc.
// Then deal with prefixed '-', '+' and '!', if not done already.
if (compile_subscript(arg, cctx, start_leader, &end_leader,
ppconst) == FAIL)
return FAIL;
if (ppconst->pp_used > 0)
{
// apply the '!', '-' and '+' before the constant
rettv = &ppconst->pp_tv[ppconst->pp_used - 1];
if (apply_leader(rettv, FALSE, start_leader, &end_leader) == FAIL)
return FAIL;
return OK;
}
if (compile_leader(cctx, FALSE, start_leader, &end_leader) == FAIL)
return FAIL;
return OK;
}
/*
* Give the "white on both sides" error, taking the operator from "p[len]".
*/
void
error_white_both(char_u *op, int len)
{
char_u buf[10];
vim_strncpy(buf, op, len);
semsg(_(e_white_space_required_before_and_after_str_at_str), buf, op);
}
/*
* <type>expr7: runtime type check / conversion
*/
static int
compile_expr7t(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
type_T *want_type = NULL;
// Recognize <type>
if (**arg == '<' && eval_isnamec1((*arg)[1]))
{
++*arg;
want_type = parse_type(arg, cctx->ctx_type_list, TRUE);
if (want_type == NULL)
return FAIL;
if (**arg != '>')
{
if (*skipwhite(*arg) == '>')
semsg(_(e_no_white_space_allowed_before_str_str), ">", *arg);
else
emsg(_(e_missing_gt));
return FAIL;
}
++*arg;
if (may_get_next_line_error(*arg, arg, cctx) == FAIL)
return FAIL;
}
if (compile_expr7(arg, cctx, ppconst) == FAIL)
return FAIL;
if (want_type != NULL)
{
garray_T *stack = &cctx->ctx_type_stack;
type_T *actual;
where_T where;
generate_ppconst(cctx, ppconst);
actual = ((type_T **)stack->ga_data)[stack->ga_len - 1];
where.wt_index = 0;
where.wt_variable = FALSE;
if (check_type(want_type, actual, FALSE, where) == FAIL)
{
if (need_type(actual, want_type, -1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
}
}
return OK;
}
/*
* * number multiplication
* / number division
* % number modulo
*/
static int
compile_expr6(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
char_u *op;
char_u *next;
int ppconst_used = ppconst->pp_used;
// get the first expression
if (compile_expr7t(arg, cctx, ppconst) == FAIL)
return FAIL;
/*
* Repeat computing, until no "*", "/" or "%" is following.
*/
for (;;)
{
op = may_peek_next_line(cctx, *arg, &next);
if (*op != '*' && *op != '/' && *op != '%')
break;
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
op = skipwhite(*arg);
}
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(op[1]))
{
error_white_both(op, 1);
return FAIL;
}
if (may_get_next_line_error(op + 1, arg, cctx) == FAIL)
return FAIL;
// get the second expression
if (compile_expr7t(arg, cctx, ppconst) == FAIL)
return FAIL;
if (ppconst->pp_used == ppconst_used + 2
&& ppconst->pp_tv[ppconst_used].v_type == VAR_NUMBER
&& ppconst->pp_tv[ppconst_used + 1].v_type == VAR_NUMBER)
{
typval_T *tv1 = &ppconst->pp_tv[ppconst_used];
typval_T *tv2 = &ppconst->pp_tv[ppconst_used + 1];
varnumber_T res = 0;
int failed = FALSE;
// both are numbers: compute the result
switch (*op)
{
case '*': res = tv1->vval.v_number * tv2->vval.v_number;
break;
case '/': res = num_divide(tv1->vval.v_number,
tv2->vval.v_number, &failed);
break;
case '%': res = num_modulus(tv1->vval.v_number,
tv2->vval.v_number, &failed);
break;
}
if (failed)
return FAIL;
tv1->vval.v_number = res;
--ppconst->pp_used;
}
else
{
generate_ppconst(cctx, ppconst);
generate_two_op(cctx, op);
}
}
return OK;
}
/*
* + number addition or list/blobl concatenation
* - number subtraction
* .. string concatenation
*/
static int
compile_expr5(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
char_u *op;
char_u *next;
int oplen;
int ppconst_used = ppconst->pp_used;
// get the first variable
if (compile_expr6(arg, cctx, ppconst) == FAIL)
return FAIL;
/*
* Repeat computing, until no "+", "-" or ".." is following.
*/
for (;;)
{
op = may_peek_next_line(cctx, *arg, &next);
if (*op != '+' && *op != '-' && !(*op == '.' && *(op + 1) == '.'))
break;
if (op[0] == op[1] && *op != '.' && next)
// Finding "++" or "--" on the next line is a separate command.
// But ".." is concatenation.
break;
oplen = (*op == '.' ? 2 : 1);
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
op = skipwhite(*arg);
}
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(op[oplen]))
{
error_white_both(op, oplen);
return FAIL;
}
if (may_get_next_line_error(op + oplen, arg, cctx) == FAIL)
return FAIL;
// get the second expression
if (compile_expr6(arg, cctx, ppconst) == FAIL)
return FAIL;
if (ppconst->pp_used == ppconst_used + 2
&& (*op == '.'
? (ppconst->pp_tv[ppconst_used].v_type == VAR_STRING
&& ppconst->pp_tv[ppconst_used + 1].v_type == VAR_STRING)
: (ppconst->pp_tv[ppconst_used].v_type == VAR_NUMBER
&& ppconst->pp_tv[ppconst_used + 1].v_type == VAR_NUMBER)))
{
typval_T *tv1 = &ppconst->pp_tv[ppconst_used];
typval_T *tv2 = &ppconst->pp_tv[ppconst_used + 1];
// concat/subtract/add constant numbers
if (*op == '+')
tv1->vval.v_number = tv1->vval.v_number + tv2->vval.v_number;
else if (*op == '-')
tv1->vval.v_number = tv1->vval.v_number - tv2->vval.v_number;
else
{
// concatenate constant strings
char_u *s1 = tv1->vval.v_string;
char_u *s2 = tv2->vval.v_string;
size_t len1 = STRLEN(s1);
tv1->vval.v_string = alloc((int)(len1 + STRLEN(s2) + 1));
if (tv1->vval.v_string == NULL)
{
clear_ppconst(ppconst);
return FAIL;
}
mch_memmove(tv1->vval.v_string, s1, len1);
STRCPY(tv1->vval.v_string + len1, s2);
vim_free(s1);
vim_free(s2);
}
--ppconst->pp_used;
}
else
{
generate_ppconst(cctx, ppconst);
ppconst->pp_is_const = FALSE;
if (*op == '.')
{
if (may_generate_2STRING(-2, FALSE, cctx) == FAIL
|| may_generate_2STRING(-1, FALSE, cctx) == FAIL)
return FAIL;
generate_instr_drop(cctx, ISN_CONCAT, 1);
}
else
generate_two_op(cctx, op);
}
}
return OK;
}
/*
* expr5a == expr5b
* expr5a =~ expr5b
* expr5a != expr5b
* expr5a !~ expr5b
* expr5a > expr5b
* expr5a >= expr5b
* expr5a < expr5b
* expr5a <= expr5b
* expr5a is expr5b
* expr5a isnot expr5b
*
* Produces instructions:
* EVAL expr5a Push result of "expr5a"
* EVAL expr5b Push result of "expr5b"
* COMPARE one of the compare instructions
*/
static int
compile_expr4(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
exprtype_T type = EXPR_UNKNOWN;
char_u *p;
char_u *next;
int len = 2;
int type_is = FALSE;
int ppconst_used = ppconst->pp_used;
// get the first variable
if (compile_expr5(arg, cctx, ppconst) == FAIL)
return FAIL;
p = may_peek_next_line(cctx, *arg, &next);
type = get_compare_type(p, &len, &type_is);
/*
* If there is a comparative operator, use it.
*/
if (type != EXPR_UNKNOWN)
{
int ic = FALSE; // Default: do not ignore case
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
p = skipwhite(*arg);
}
if (type_is && (p[len] == '?' || p[len] == '#'))
{
semsg(_(e_invalid_expression_str), *arg);
return FAIL;
}
// extra question mark appended: ignore case
if (p[len] == '?')
{
ic = TRUE;
++len;
}
// extra '#' appended: match case (ignored)
else if (p[len] == '#')
++len;
// nothing appended: match case
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(p[len]))
{
error_white_both(p, len);
return FAIL;
}
// get the second variable
if (may_get_next_line_error(p + len, arg, cctx) == FAIL)
return FAIL;
if (compile_expr5(arg, cctx, ppconst) == FAIL)
return FAIL;
if (ppconst->pp_used == ppconst_used + 2)
{
typval_T * tv1 = &ppconst->pp_tv[ppconst->pp_used - 2];
typval_T *tv2 = &ppconst->pp_tv[ppconst->pp_used - 1];
int ret;
// Both sides are a constant, compute the result now.
// First check for a valid combination of types, this is more
// strict than typval_compare().
if (check_compare_types(type, tv1, tv2) == FAIL)
ret = FAIL;
else
{
ret = typval_compare(tv1, tv2, type, ic);
tv1->v_type = VAR_BOOL;
tv1->vval.v_number = tv1->vval.v_number
? VVAL_TRUE : VVAL_FALSE;
clear_tv(tv2);
--ppconst->pp_used;
}
return ret;
}
generate_ppconst(cctx, ppconst);
return generate_COMPARE(cctx, type, ic);
}
return OK;
}
static int compile_expr3(char_u **arg, cctx_T *cctx, ppconst_T *ppconst);
/*
* Compile || or &&.
*/
static int
compile_and_or(
char_u **arg,
cctx_T *cctx,
char *op,
ppconst_T *ppconst,
int ppconst_used UNUSED)
{
char_u *next;
char_u *p = may_peek_next_line(cctx, *arg, &next);
int opchar = *op;
if (p[0] == opchar && p[1] == opchar)
{
garray_T *instr = &cctx->ctx_instr;
garray_T end_ga;
/*
* Repeat until there is no following "||" or "&&"
*/
ga_init2(&end_ga, sizeof(int), 10);
while (p[0] == opchar && p[1] == opchar)
{
long start_lnum = SOURCING_LNUM;
int start_ctx_lnum = cctx->ctx_lnum;
int save_lnum;
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
p = skipwhite(*arg);
}
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(p[2]))
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
op, p);
return FAIL;
}
// TODO: use ppconst if the value is a constant and check
// evaluating to bool
generate_ppconst(cctx, ppconst);
// Every part must evaluate to a bool.
SOURCING_LNUM = start_lnum;
save_lnum = cctx->ctx_lnum;
cctx->ctx_lnum = start_ctx_lnum;
if (bool_on_stack(cctx) == FAIL)
{
cctx->ctx_lnum = save_lnum;
ga_clear(&end_ga);
return FAIL;
}
cctx->ctx_lnum = save_lnum;
if (ga_grow(&end_ga, 1) == FAIL)
{
ga_clear(&end_ga);
return FAIL;
}
*(((int *)end_ga.ga_data) + end_ga.ga_len) = instr->ga_len;
++end_ga.ga_len;
generate_JUMP(cctx, opchar == '|'
? JUMP_IF_COND_TRUE : JUMP_IF_COND_FALSE, 0);
// eval the next expression
if (may_get_next_line_error(p + 2, arg, cctx) == FAIL)
{
ga_clear(&end_ga);
return FAIL;
}
if ((opchar == '|' ? compile_expr3(arg, cctx, ppconst)
: compile_expr4(arg, cctx, ppconst)) == FAIL)
{
ga_clear(&end_ga);
return FAIL;
}
p = may_peek_next_line(cctx, *arg, &next);
}
generate_ppconst(cctx, ppconst);
// Every part must evaluate to a bool.
if (bool_on_stack(cctx) == FAIL)
{
ga_clear(&end_ga);
return FAIL;
}
// Fill in the end label in all jumps.
while (end_ga.ga_len > 0)
{
isn_T *isn;
--end_ga.ga_len;
isn = ((isn_T *)instr->ga_data)
+ *(((int *)end_ga.ga_data) + end_ga.ga_len);
isn->isn_arg.jump.jump_where = instr->ga_len;
}
ga_clear(&end_ga);
}
return OK;
}
/*
* expr4a && expr4a && expr4a logical AND
*
* Produces instructions:
* EVAL expr4a Push result of "expr4a"
* COND2BOOL convert to bool if needed
* JUMP_IF_COND_FALSE end
* EVAL expr4b Push result of "expr4b"
* JUMP_IF_COND_FALSE end
* EVAL expr4c Push result of "expr4c"
* end:
*/
static int
compile_expr3(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
int ppconst_used = ppconst->pp_used;
// get the first variable
if (compile_expr4(arg, cctx, ppconst) == FAIL)
return FAIL;
// || and && work almost the same
return compile_and_or(arg, cctx, "&&", ppconst, ppconst_used);
}
/*
* expr3a || expr3b || expr3c logical OR
*
* Produces instructions:
* EVAL expr3a Push result of "expr3a"
* COND2BOOL convert to bool if needed
* JUMP_IF_COND_TRUE end
* EVAL expr3b Push result of "expr3b"
* JUMP_IF_COND_TRUE end
* EVAL expr3c Push result of "expr3c"
* end:
*/
static int
compile_expr2(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
int ppconst_used = ppconst->pp_used;
// eval the first expression
if (compile_expr3(arg, cctx, ppconst) == FAIL)
return FAIL;
// || and && work almost the same
return compile_and_or(arg, cctx, "||", ppconst, ppconst_used);
}
/*
* Toplevel expression: expr2 ? expr1a : expr1b
* Produces instructions:
* EVAL expr2 Push result of "expr2"
* JUMP_IF_FALSE alt jump if false
* EVAL expr1a
* JUMP_ALWAYS end
* alt: EVAL expr1b
* end:
*
* Toplevel expression: expr2 ?? expr1
* Produces instructions:
* EVAL expr2 Push result of "expr2"
* JUMP_AND_KEEP_IF_TRUE end jump if true
* EVAL expr1
* end:
*/
static int
compile_expr1(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
{
char_u *p;
int ppconst_used = ppconst->pp_used;
char_u *next;
// Ignore all kinds of errors when not producing code.
if (cctx->ctx_skip == SKIP_YES)
{
skip_expr_cctx(arg, cctx);
return OK;
}
// Evaluate the first expression.
if (compile_expr2(arg, cctx, ppconst) == FAIL)
return FAIL;
p = may_peek_next_line(cctx, *arg, &next);
if (*p == '?')
{
int op_falsy = p[1] == '?';
garray_T *instr = &cctx->ctx_instr;
garray_T *stack = &cctx->ctx_type_stack;
int alt_idx = instr->ga_len;
int end_idx = 0;
isn_T *isn;
type_T *type1 = NULL;
int has_const_expr = FALSE;
int const_value = FALSE;
int save_skip = cctx->ctx_skip;
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
p = skipwhite(*arg);
}
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(p[1 + op_falsy]))
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
op_falsy ? "??" : "?", p);
return FAIL;
}
if (ppconst->pp_used == ppconst_used + 1)
{
// the condition is a constant, we know whether the ? or the :
// expression is to be evaluated.
has_const_expr = TRUE;
if (op_falsy)
const_value = tv2bool(&ppconst->pp_tv[ppconst_used]);
else
{
int error = FALSE;
const_value = tv_get_bool_chk(&ppconst->pp_tv[ppconst_used],
&error);
if (error)
return FAIL;
}
cctx->ctx_skip = save_skip == SKIP_YES ||
(op_falsy ? const_value : !const_value) ? SKIP_YES : SKIP_NOT;
if (op_falsy && cctx->ctx_skip == SKIP_YES)
// "left ?? right" and "left" is truthy: produce "left"
generate_ppconst(cctx, ppconst);
else
{
clear_tv(&ppconst->pp_tv[ppconst_used]);
--ppconst->pp_used;
}
}
else
{
generate_ppconst(cctx, ppconst);
if (op_falsy)
end_idx = instr->ga_len;
generate_JUMP(cctx, op_falsy
? JUMP_AND_KEEP_IF_TRUE : JUMP_IF_FALSE, 0);
if (op_falsy)
type1 = ((type_T **)stack->ga_data)[stack->ga_len];
}
// evaluate the second expression; any type is accepted
if (may_get_next_line_error(p + 1 + op_falsy, arg, cctx) == FAIL)
return FAIL;
if (compile_expr1(arg, cctx, ppconst) == FAIL)
return FAIL;
if (!has_const_expr)
{
generate_ppconst(cctx, ppconst);
if (!op_falsy)
{
// remember the type and drop it
--stack->ga_len;
type1 = ((type_T **)stack->ga_data)[stack->ga_len];
end_idx = instr->ga_len;
generate_JUMP(cctx, JUMP_ALWAYS, 0);
// jump here from JUMP_IF_FALSE
isn = ((isn_T *)instr->ga_data) + alt_idx;
isn->isn_arg.jump.jump_where = instr->ga_len;
}
}
if (!op_falsy)
{
// Check for the ":".
p = may_peek_next_line(cctx, *arg, &next);
if (*p != ':')
{
emsg(_(e_missing_colon));
return FAIL;
}
if (next != NULL)
{
*arg = next_line_from_context(cctx, TRUE);
p = skipwhite(*arg);
}
if (!IS_WHITE_OR_NUL(**arg) || !IS_WHITE_OR_NUL(p[1]))
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", p);
return FAIL;
}
// evaluate the third expression
if (has_const_expr)
cctx->ctx_skip = save_skip == SKIP_YES || const_value
? SKIP_YES : SKIP_NOT;
if (may_get_next_line_error(p + 1, arg, cctx) == FAIL)
return FAIL;
if (compile_expr1(arg, cctx, ppconst) == FAIL)
return FAIL;
}
if (!has_const_expr)
{
type_T **typep;
generate_ppconst(cctx, ppconst);
// If the types differ, the result has a more generic type.
typep = ((type_T **)stack->ga_data) + stack->ga_len - 1;
common_type(type1, *typep, typep, cctx->ctx_type_list);
// jump here from JUMP_ALWAYS or JUMP_AND_KEEP_IF_TRUE
isn = ((isn_T *)instr->ga_data) + end_idx;
isn->isn_arg.jump.jump_where = instr->ga_len;
}
cctx->ctx_skip = save_skip;
}
return OK;
}
/*
* Toplevel expression.
* Sets "is_const" (if not NULL) to indicate the value is a constant.
* Returns OK or FAIL.
*/
static int
compile_expr0_ext(char_u **arg, cctx_T *cctx, int *is_const)
{
ppconst_T ppconst;
CLEAR_FIELD(ppconst);
if (compile_expr1(arg, cctx, &ppconst) == FAIL)
{
clear_ppconst(&ppconst);
return FAIL;
}
if (is_const != NULL)
*is_const = ppconst.pp_used > 0 || ppconst.pp_is_const;
if (generate_ppconst(cctx, &ppconst) == FAIL)
return FAIL;
return OK;
}
/*
* Toplevel expression.
*/
static int
compile_expr0(char_u **arg, cctx_T *cctx)
{
return compile_expr0_ext(arg, cctx, NULL);
}
/*
* Compile "return [expr]".
* When "legacy" is TRUE evaluate [expr] with legacy syntax
*/
static char_u *
compile_return(char_u *arg, int check_return_type, int legacy, cctx_T *cctx)
{
char_u *p = arg;
garray_T *stack = &cctx->ctx_type_stack;
type_T *stack_type;
if (*p != NUL && *p != '|' && *p != '\n')
{
if (legacy)
{
int save_flags = cmdmod.cmod_flags;
generate_LEGACY_EVAL(cctx, p);
if (need_type(&t_any, cctx->ctx_ufunc->uf_ret_type, -1,
0, cctx, FALSE, FALSE) == FAIL)
return NULL;
cmdmod.cmod_flags |= CMOD_LEGACY;
(void)skip_expr(&p, NULL);
cmdmod.cmod_flags = save_flags;
}
else
{
// compile return argument into instructions
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
}
if (cctx->ctx_skip != SKIP_YES)
{
// "check_return_type" with uf_ret_type set to &t_unknown is used
// for an inline function without a specified return type. Set the
// return type here.
stack_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if ((check_return_type && (cctx->ctx_ufunc->uf_ret_type == NULL
|| cctx->ctx_ufunc->uf_ret_type == &t_unknown
|| cctx->ctx_ufunc->uf_ret_type == &t_any))
|| (!check_return_type
&& cctx->ctx_ufunc->uf_ret_type == &t_unknown))
{
cctx->ctx_ufunc->uf_ret_type = stack_type;
}
else
{
if (cctx->ctx_ufunc->uf_ret_type->tt_type == VAR_VOID
&& stack_type->tt_type != VAR_VOID
&& stack_type->tt_type != VAR_UNKNOWN)
{
emsg(_(e_returning_value_in_function_without_return_type));
return NULL;
}
if (need_type(stack_type, cctx->ctx_ufunc->uf_ret_type, -1,
0, cctx, FALSE, FALSE) == FAIL)
return NULL;
}
}
}
else
{
// "check_return_type" cannot be TRUE, only used for a lambda which
// always has an argument.
if (cctx->ctx_ufunc->uf_ret_type->tt_type != VAR_VOID
&& cctx->ctx_ufunc->uf_ret_type->tt_type != VAR_UNKNOWN)
{
emsg(_(e_missing_return_value));
return NULL;
}
// No argument, return zero.
generate_PUSHNR(cctx, 0);
}
// Undo any command modifiers.
generate_undo_cmdmods(cctx);
if (cctx->ctx_skip != SKIP_YES && generate_instr(cctx, ISN_RETURN) == NULL)
return NULL;
// "return val | endif" is possible
return skipwhite(p);
}
/*
* Get a line from the compilation context, compatible with exarg_T getline().
* Return a pointer to the line in allocated memory.
* Return NULL for end-of-file or some error.
*/
static char_u *
exarg_getline(
int c UNUSED,
void *cookie,
int indent UNUSED,
getline_opt_T options UNUSED)
{
cctx_T *cctx = (cctx_T *)cookie;
char_u *p;
for (;;)
{
if (cctx->ctx_lnum >= cctx->ctx_ufunc->uf_lines.ga_len - 1)
return NULL;
++cctx->ctx_lnum;
p = ((char_u **)cctx->ctx_ufunc->uf_lines.ga_data)[cctx->ctx_lnum];
// Comment lines result in NULL pointers, skip them.
if (p != NULL)
return vim_strsave(p);
}
}
void
fill_exarg_from_cctx(exarg_T *eap, cctx_T *cctx)
{
eap->getline = exarg_getline;
eap->cookie = cctx;
}
/*
* Compile a nested :def command.
*/
static char_u *
compile_nested_function(exarg_T *eap, cctx_T *cctx)
{
int is_global = *eap->arg == 'g' && eap->arg[1] == ':';
char_u *name_start = eap->arg;
char_u *name_end = to_name_end(eap->arg, TRUE);
char_u *lambda_name;
ufunc_T *ufunc;
int r = FAIL;
if (eap->forceit)
{
emsg(_(e_cannot_use_bang_with_nested_def));
return NULL;
}
if (*name_start == '/')
{
name_end = skip_regexp(name_start + 1, '/', TRUE);
if (*name_end == '/')
++name_end;
eap->nextcmd = check_nextcmd(name_end);
}
if (name_end == name_start || *skipwhite(name_end) != '(')
{
if (!ends_excmd2(name_start, name_end))
{
semsg(_(e_invalid_command_str), eap->cmd);
return NULL;
}
// "def" or "def Name": list functions
if (generate_DEF(cctx, name_start, name_end - name_start) == FAIL)
return NULL;
return eap->nextcmd == NULL ? (char_u *)"" : eap->nextcmd;
}
// Only g:Func() can use a namespace.
if (name_start[1] == ':' && !is_global)
{
semsg(_(e_namespace_not_supported_str), name_start);
return NULL;
}
if (check_defined(name_start, name_end - name_start, cctx, FALSE) == FAIL)
return NULL;
eap->arg = name_end;
fill_exarg_from_cctx(eap, cctx);
eap->forceit = FALSE;
lambda_name = vim_strsave(get_lambda_name());
if (lambda_name == NULL)
return NULL;
ufunc = define_function(eap, lambda_name);
if (ufunc == NULL)
{
r = eap->skip ? OK : FAIL;
goto theend;
}
// copy over the block scope IDs before compiling
if (!is_global && cctx->ctx_ufunc->uf_block_depth > 0)
{
int block_depth = cctx->ctx_ufunc->uf_block_depth;
ufunc->uf_block_ids = ALLOC_MULT(int, block_depth);
if (ufunc->uf_block_ids != NULL)
{
mch_memmove(ufunc->uf_block_ids, cctx->ctx_ufunc->uf_block_ids,
sizeof(int) * block_depth);
ufunc->uf_block_depth = block_depth;
}
}
if (func_needs_compiling(ufunc, COMPILE_TYPE(ufunc))
&& compile_def_function(ufunc, TRUE, COMPILE_TYPE(ufunc), cctx)
== FAIL)
{
func_ptr_unref(ufunc);
goto theend;
}
if (is_global)
{
char_u *func_name = vim_strnsave(name_start + 2,
name_end - name_start - 2);
if (func_name == NULL)
r = FAIL;
else
{
r = generate_NEWFUNC(cctx, lambda_name, func_name);
lambda_name = NULL;
}
}
else
{
// Define a local variable for the function reference.
lvar_T *lvar = reserve_local(cctx, name_start, name_end - name_start,
TRUE, ufunc->uf_func_type);
if (lvar == NULL)
goto theend;
if (generate_FUNCREF(cctx, ufunc) == FAIL)
goto theend;
r = generate_STORE(cctx, ISN_STORE, lvar->lv_idx, NULL);
}
// TODO: warning for trailing text?
theend:
vim_free(lambda_name);
return r == FAIL ? NULL : (char_u *)"";
}
/*
* Return the length of an assignment operator, or zero if there isn't one.
*/
int
assignment_len(char_u *p, int *heredoc)
{
if (*p == '=')
{
if (p[1] == '<' && p[2] == '<')
{
*heredoc = TRUE;
return 3;
}
return 1;
}
if (vim_strchr((char_u *)"+-*/%", *p) != NULL && p[1] == '=')
return 2;
if (STRNCMP(p, "..=", 3) == 0)
return 3;
return 0;
}
/*
* Generate the load instruction for "name".
*/
static void
generate_loadvar(
cctx_T *cctx,
assign_dest_T dest,
char_u *name,
lvar_T *lvar,
type_T *type)
{
switch (dest)
{
case dest_option:
// TODO: check the option exists
generate_LOAD(cctx, ISN_LOADOPT, 0, name, type);
break;
case dest_global:
if (vim_strchr(name, AUTOLOAD_CHAR) == NULL)
generate_LOAD(cctx, ISN_LOADG, 0, name + 2, type);
else
generate_LOAD(cctx, ISN_LOADAUTO, 0, name, type);
break;
case dest_buffer:
generate_LOAD(cctx, ISN_LOADB, 0, name + 2, type);
break;
case dest_window:
generate_LOAD(cctx, ISN_LOADW, 0, name + 2, type);
break;
case dest_tab:
generate_LOAD(cctx, ISN_LOADT, 0, name + 2, type);
break;
case dest_script:
compile_load_scriptvar(cctx,
name + (name[1] == ':' ? 2 : 0), NULL, NULL, TRUE);
break;
case dest_env:
// Include $ in the name here
generate_LOAD(cctx, ISN_LOADENV, 0, name, type);
break;
case dest_reg:
generate_LOAD(cctx, ISN_LOADREG, name[1], NULL, &t_string);
break;
case dest_vimvar:
generate_LOADV(cctx, name + 2, TRUE);
break;
case dest_local:
if (lvar->lv_from_outer > 0)
generate_LOADOUTER(cctx, lvar->lv_idx, lvar->lv_from_outer,
type);
else
generate_LOAD(cctx, ISN_LOAD, lvar->lv_idx, NULL, type);
break;
case dest_expr:
// list or dict value should already be on the stack.
break;
}
}
/*
* Skip over "[expr]" or ".member".
* Does not check for any errors.
*/
static char_u *
skip_index(char_u *start)
{
char_u *p = start;
if (*p == '[')
{
p = skipwhite(p + 1);
(void)skip_expr(&p, NULL);
p = skipwhite(p);
if (*p == ']')
return p + 1;
return p;
}
// if (*p == '.')
return to_name_end(p + 1, TRUE);
}
void
vim9_declare_error(char_u *name)
{
char *scope = "";
switch (*name)
{
case 'g': scope = _("global"); break;
case 'b': scope = _("buffer"); break;
case 'w': scope = _("window"); break;
case 't': scope = _("tab"); break;
case 'v': scope = "v:"; break;
case '$': semsg(_(e_cannot_declare_an_environment_variable), name);
return;
case '&': semsg(_(e_cannot_declare_an_option), name);
return;
case '@': semsg(_(e_cannot_declare_a_register_str), name);
return;
default: return;
}
semsg(_(e_cannot_declare_a_scope_variable), scope, name);
}
/*
* For one assignment figure out the type of destination. Return it in "dest".
* When not recognized "dest" is not set.
* For an option "opt_flags" is set.
* For a v:var "vimvaridx" is set.
* "type" is set to the destination type if known, unchanted otherwise.
* Return FAIL if an error message was given.
*/
static int
get_var_dest(
char_u *name,
assign_dest_T *dest,
int cmdidx,
int *opt_flags,
int *vimvaridx,
type_T **type,
cctx_T *cctx)
{
char_u *p;
if (*name == '&')
{
int cc;
long numval;
getoption_T opt_type;
*dest = dest_option;
if (cmdidx == CMD_final || cmdidx == CMD_const)
{
emsg(_(e_const_option));
return FAIL;
}
p = name;
p = find_option_end(&p, opt_flags);
if (p == NULL)
{
// cannot happen?
emsg(_(e_unexpected_characters_in_assignment));
return FAIL;
}
cc = *p;
*p = NUL;
opt_type = get_option_value(skip_option_env_lead(name),
&numval, NULL, *opt_flags);
*p = cc;
switch (opt_type)
{
case gov_unknown:
semsg(_(e_unknown_option), name);
return FAIL;
case gov_string:
case gov_hidden_string:
*type = &t_string;
break;
case gov_bool:
case gov_hidden_bool:
*type = &t_bool;
break;
case gov_number:
case gov_hidden_number:
*type = &t_number;
break;
}
}
else if (*name == '$')
{
*dest = dest_env;
*type = &t_string;
}
else if (*name == '@')
{
if (name[1] != '@'
&& (!valid_yank_reg(name[1], FALSE) || name[1] == '.'))
{
emsg_invreg(name[1]);
return FAIL;
}
*dest = dest_reg;
*type = name[1] == '#' ? &t_number_or_string : &t_string;
}
else if (STRNCMP(name, "g:", 2) == 0)
{
*dest = dest_global;
}
else if (STRNCMP(name, "b:", 2) == 0)
{
*dest = dest_buffer;
}
else if (STRNCMP(name, "w:", 2) == 0)
{
*dest = dest_window;
}
else if (STRNCMP(name, "t:", 2) == 0)
{
*dest = dest_tab;
}
else if (STRNCMP(name, "v:", 2) == 0)
{
typval_T *vtv;
int di_flags;
*vimvaridx = find_vim_var(name + 2, &di_flags);
if (*vimvaridx < 0)
{
semsg(_(e_variable_not_found_str), name);
return FAIL;
}
// We use the current value of "sandbox" here, is that OK?
if (var_check_ro(di_flags, name, FALSE))
return FAIL;
*dest = dest_vimvar;
vtv = get_vim_var_tv(*vimvaridx);
*type = typval2type_vimvar(vtv, cctx->ctx_type_list);
}
return OK;
}
/*
* Generate a STORE instruction for "dest", not being "dest_local".
* Return FAIL when out of memory.
*/
static int
generate_store_var(
cctx_T *cctx,
assign_dest_T dest,
int opt_flags,
int vimvaridx,
int scriptvar_idx,
int scriptvar_sid,
type_T *type,
char_u *name)
{
switch (dest)
{
case dest_option:
return generate_STOREOPT(cctx, skip_option_env_lead(name),
opt_flags);
case dest_global:
// include g: with the name, easier to execute that way
return generate_STORE(cctx, vim_strchr(name, AUTOLOAD_CHAR) == NULL
? ISN_STOREG : ISN_STOREAUTO, 0, name);
case dest_buffer:
// include b: with the name, easier to execute that way
return generate_STORE(cctx, ISN_STOREB, 0, name);
case dest_window:
// include w: with the name, easier to execute that way
return generate_STORE(cctx, ISN_STOREW, 0, name);
case dest_tab:
// include t: with the name, easier to execute that way
return generate_STORE(cctx, ISN_STORET, 0, name);
case dest_env:
return generate_STORE(cctx, ISN_STOREENV, 0, name + 1);
case dest_reg:
return generate_STORE(cctx, ISN_STOREREG,
name[1] == '@' ? '"' : name[1], NULL);
case dest_vimvar:
return generate_STORE(cctx, ISN_STOREV, vimvaridx, NULL);
case dest_script:
if (scriptvar_idx < 0)
// "s:" may be included in the name.
return generate_OLDSCRIPT(cctx, ISN_STORES, name,
scriptvar_sid, type);
return generate_VIM9SCRIPT(cctx, ISN_STORESCRIPT,
scriptvar_sid, scriptvar_idx, type);
case dest_local:
case dest_expr:
// cannot happen
break;
}
return FAIL;
}
static int
generate_store_lhs(cctx_T *cctx, lhs_T *lhs, int instr_count)
{
if (lhs->lhs_dest != dest_local)
return generate_store_var(cctx, lhs->lhs_dest,
lhs->lhs_opt_flags, lhs->lhs_vimvaridx,
lhs->lhs_scriptvar_idx, lhs->lhs_scriptvar_sid,
lhs->lhs_type, lhs->lhs_name);
if (lhs->lhs_lvar != NULL)
{
garray_T *instr = &cctx->ctx_instr;
isn_T *isn = ((isn_T *)instr->ga_data) + instr->ga_len - 1;
// optimization: turn "var = 123" from ISN_PUSHNR + ISN_STORE into
// ISN_STORENR
if (lhs->lhs_lvar->lv_from_outer == 0
&& instr->ga_len == instr_count + 1
&& isn->isn_type == ISN_PUSHNR)
{
varnumber_T val = isn->isn_arg.number;
garray_T *stack = &cctx->ctx_type_stack;
isn->isn_type = ISN_STORENR;
isn->isn_arg.storenr.stnr_idx = lhs->lhs_lvar->lv_idx;
isn->isn_arg.storenr.stnr_val = val;
if (stack->ga_len > 0)
--stack->ga_len;
}
else if (lhs->lhs_lvar->lv_from_outer > 0)
generate_STOREOUTER(cctx, lhs->lhs_lvar->lv_idx,
lhs->lhs_lvar->lv_from_outer);
else
generate_STORE(cctx, ISN_STORE, lhs->lhs_lvar->lv_idx, NULL);
}
return OK;
}
static int
is_decl_command(int cmdidx)
{
return cmdidx == CMD_let || cmdidx == CMD_var
|| cmdidx == CMD_final || cmdidx == CMD_const;
}
/*
* Figure out the LHS type and other properties for an assignment or one item
* of ":unlet" with an index.
* Returns OK or FAIL.
*/
static int
compile_lhs(
char_u *var_start,
lhs_T *lhs,
int cmdidx,
int heredoc,
int oplen,
cctx_T *cctx)
{
char_u *var_end;
int is_decl = is_decl_command(cmdidx);
CLEAR_POINTER(lhs);
lhs->lhs_dest = dest_local;
lhs->lhs_vimvaridx = -1;
lhs->lhs_scriptvar_idx = -1;
// "dest_end" is the end of the destination, including "[expr]" or
// ".name".
// "var_end" is the end of the variable/option/etc. name.
lhs->lhs_dest_end = skip_var_one(var_start, FALSE);
if (*var_start == '@')
var_end = var_start + 2;
else
{
// skip over the leading "&", "&l:", "&g:" and "$"
var_end = skip_option_env_lead(var_start);
var_end = to_name_end(var_end, TRUE);
}
// "a: type" is declaring variable "a" with a type, not dict "a:".
if (is_decl && lhs->lhs_dest_end == var_start + 2
&& lhs->lhs_dest_end[-1] == ':')
--lhs->lhs_dest_end;
if (is_decl && var_end == var_start + 2 && var_end[-1] == ':')
--var_end;
// compute the length of the destination without "[expr]" or ".name"
lhs->lhs_varlen = var_end - var_start;
lhs->lhs_varlen_total = lhs->lhs_varlen;
lhs->lhs_name = vim_strnsave(var_start, lhs->lhs_varlen);
if (lhs->lhs_name == NULL)
return FAIL;
if (lhs->lhs_dest_end > var_start + lhs->lhs_varlen)
// Something follows after the variable: "var[idx]" or "var.key".
lhs->lhs_has_index = TRUE;
if (heredoc)
lhs->lhs_type = &t_list_string;
else
lhs->lhs_type = &t_any;
if (cctx->ctx_skip != SKIP_YES)
{
int declare_error = FALSE;
if (get_var_dest(lhs->lhs_name, &lhs->lhs_dest, cmdidx,
&lhs->lhs_opt_flags, &lhs->lhs_vimvaridx,
&lhs->lhs_type, cctx) == FAIL)
return FAIL;
if (lhs->lhs_dest != dest_local
&& cmdidx != CMD_const && cmdidx != CMD_final)
{
// Specific kind of variable recognized.
declare_error = is_decl;
}
else
{
// No specific kind of variable recognized, just a name.
if (check_reserved_name(lhs->lhs_name) == FAIL)
return FAIL;
if (lookup_local(var_start, lhs->lhs_varlen,
&lhs->lhs_local_lvar, cctx) == OK)
lhs->lhs_lvar = &lhs->lhs_local_lvar;
else
{
CLEAR_FIELD(lhs->lhs_arg_lvar);
if (arg_exists(var_start, lhs->lhs_varlen,
&lhs->lhs_arg_lvar.lv_idx, &lhs->lhs_arg_lvar.lv_type,
&lhs->lhs_arg_lvar.lv_from_outer, cctx) == OK)
{
if (is_decl)
{
semsg(_(e_str_is_used_as_argument), lhs->lhs_name);
return FAIL;
}
lhs->lhs_lvar = &lhs->lhs_arg_lvar;
}
}
if (lhs->lhs_lvar != NULL)
{
if (is_decl)
{
semsg(_(e_variable_already_declared), lhs->lhs_name);
return FAIL;
}
}
else
{
int script_namespace = lhs->lhs_varlen > 1
&& STRNCMP(var_start, "s:", 2) == 0;
int script_var = (script_namespace
? script_var_exists(var_start + 2, lhs->lhs_varlen - 2,
cctx)
: script_var_exists(var_start, lhs->lhs_varlen,
cctx)) == OK;
imported_T *import =
find_imported(var_start, lhs->lhs_varlen, cctx);
if (script_namespace || script_var || import != NULL)
{
char_u *rawname = lhs->lhs_name
+ (lhs->lhs_name[1] == ':' ? 2 : 0);
if (is_decl)
{
if (script_namespace)
semsg(_(e_cannot_declare_script_variable_in_function),
lhs->lhs_name);
else
semsg(_(e_variable_already_declared_in_script_str),
lhs->lhs_name);
return FAIL;
}
else if (cctx->ctx_ufunc->uf_script_ctx_version
== SCRIPT_VERSION_VIM9
&& script_namespace
&& !script_var && import == NULL)
{
semsg(_(e_unknown_variable_str), lhs->lhs_name);
return FAIL;
}
lhs->lhs_dest = dest_script;
// existing script-local variables should have a type
lhs->lhs_scriptvar_sid = current_sctx.sc_sid;
if (import != NULL)
lhs->lhs_scriptvar_sid = import->imp_sid;
if (SCRIPT_ID_VALID(lhs->lhs_scriptvar_sid))
{
// Check writable only when no index follows.
lhs->lhs_scriptvar_idx = get_script_item_idx(
lhs->lhs_scriptvar_sid, rawname,
lhs->lhs_has_index ? ASSIGN_FINAL : ASSIGN_CONST,
cctx);
if (lhs->lhs_scriptvar_idx >= 0)
{
scriptitem_T *si = SCRIPT_ITEM(
lhs->lhs_scriptvar_sid);
svar_T *sv =
((svar_T *)si->sn_var_vals.ga_data)
+ lhs->lhs_scriptvar_idx;
lhs->lhs_type = sv->sv_type;
}
}
}
else if (check_defined(var_start, lhs->lhs_varlen, cctx, FALSE)
== FAIL)
return FAIL;
}
}
if (declare_error)
{
vim9_declare_error(lhs->lhs_name);
return FAIL;
}
}
// handle "a:name" as a name, not index "name" on "a"
if (lhs->lhs_varlen > 1 || var_start[lhs->lhs_varlen] != ':')
var_end = lhs->lhs_dest_end;
if (lhs->lhs_dest != dest_option)
{
if (is_decl && *var_end == ':')
{
char_u *p;
// parse optional type: "let var: type = expr"
if (!VIM_ISWHITE(var_end[1]))
{
semsg(_(e_white_space_required_after_str_str), ":", var_end);
return FAIL;
}
p = skipwhite(var_end + 1);
lhs->lhs_type = parse_type(&p, cctx->ctx_type_list, TRUE);
if (lhs->lhs_type == NULL)
return FAIL;
lhs->lhs_has_type = TRUE;
}
else if (lhs->lhs_lvar != NULL)
lhs->lhs_type = lhs->lhs_lvar->lv_type;
}
if (oplen == 3 && !heredoc
&& lhs->lhs_dest != dest_global
&& !lhs->lhs_has_index
&& lhs->lhs_type->tt_type != VAR_STRING
&& lhs->lhs_type->tt_type != VAR_ANY)
{
emsg(_(e_can_only_concatenate_to_string));
return FAIL;
}
if (lhs->lhs_lvar == NULL && lhs->lhs_dest == dest_local
&& cctx->ctx_skip != SKIP_YES)
{
if (oplen > 1 && !heredoc)
{
// +=, /=, etc. require an existing variable
semsg(_(e_cannot_use_operator_on_new_variable), lhs->lhs_name);
return FAIL;
}
if (!is_decl)
{
semsg(_(e_unknown_variable_str), lhs->lhs_name);
return FAIL;
}
// Check the name is valid for a funcref.
if ((lhs->lhs_type->tt_type == VAR_FUNC
|| lhs->lhs_type->tt_type == VAR_PARTIAL)
&& var_wrong_func_name(lhs->lhs_name, TRUE))
return FAIL;
// New local variable.
lhs->lhs_lvar = reserve_local(cctx, var_start, lhs->lhs_varlen,
cmdidx == CMD_final || cmdidx == CMD_const, lhs->lhs_type);
if (lhs->lhs_lvar == NULL)
return FAIL;
lhs->lhs_new_local = TRUE;
}
lhs->lhs_member_type = lhs->lhs_type;
if (lhs->lhs_has_index)
{
// Something follows after the variable: "var[idx]" or "var.key".
// TODO: should we also handle "->func()" here?
if (is_decl)
{
emsg(_(e_cannot_use_index_when_declaring_variable));
return FAIL;
}
if (var_start[lhs->lhs_varlen] == '['
|| var_start[lhs->lhs_varlen] == '.')
{
char_u *after = var_start + lhs->lhs_varlen;
char_u *p;
// Only the last index is used below, if there are others
// before it generate code for the expression. Thus for
// "ll[1][2]" the expression is "ll[1]" and "[2]" is the index.
for (;;)
{
p = skip_index(after);
if (*p != '[' && *p != '.')
{
lhs->lhs_varlen_total = p - var_start;
break;
}
after = p;
}
if (after > var_start + lhs->lhs_varlen)
{
lhs->lhs_varlen = after - var_start;
lhs->lhs_dest = dest_expr;
// We don't know the type before evaluating the expression,
// use "any" until then.
lhs->lhs_type = &t_any;
}
if (lhs->lhs_type->tt_member == NULL)
lhs->lhs_member_type = &t_any;
else
lhs->lhs_member_type = lhs->lhs_type->tt_member;
}
else
{
semsg("Not supported yet: %s", var_start);
return FAIL;
}
}
return OK;
}
/*
* Figure out the LHS and check a few errors.
*/
static int
compile_assign_lhs(
char_u *var_start,
lhs_T *lhs,
int cmdidx,
int is_decl,
int heredoc,
int oplen,
cctx_T *cctx)
{
if (compile_lhs(var_start, lhs, cmdidx, heredoc, oplen, cctx) == FAIL)
return FAIL;
if (!lhs->lhs_has_index && lhs->lhs_lvar == &lhs->lhs_arg_lvar)
{
semsg(_(e_cannot_assign_to_argument), lhs->lhs_name);
return FAIL;
}
if (!is_decl && lhs->lhs_lvar != NULL
&& lhs->lhs_lvar->lv_const && !lhs->lhs_has_index)
{
semsg(_(e_cannot_assign_to_constant), lhs->lhs_name);
return FAIL;
}
return OK;
}
/*
* For an assignment with an index, compile the "idx" in "var[idx]" or "key" in
* "var.key".
*/
static int
compile_assign_index(
char_u *var_start,
lhs_T *lhs,
int *range,
cctx_T *cctx)
{
size_t varlen = lhs->lhs_varlen;
char_u *p;
int r = OK;
int need_white_before = TRUE;
int empty_second;
p = var_start + varlen;
if (*p == '[')
{
p = skipwhite(p + 1);
if (*p == ':')
{
// empty first index, push zero
r = generate_PUSHNR(cctx, 0);
need_white_before = FALSE;
}
else
r = compile_expr0(&p, cctx);
if (r == OK && *skipwhite(p) == ':')
{
// unlet var[idx : idx]
// blob[idx : idx] = value
*range = TRUE;
p = skipwhite(p);
empty_second = *skipwhite(p + 1) == ']';
if ((need_white_before && !IS_WHITE_OR_NUL(p[-1]))
|| (!empty_second && !IS_WHITE_OR_NUL(p[1])))
{
semsg(_(e_white_space_required_before_and_after_str_at_str),
":", p);
return FAIL;
}
p = skipwhite(p + 1);
if (*p == ']')
// empty second index, push "none"
r = generate_PUSHSPEC(cctx, VVAL_NONE);
else
r = compile_expr0(&p, cctx);
}
if (r == OK && *skipwhite(p) != ']')
{
// this should not happen
emsg(_(e_missbrac));
r = FAIL;
}
}
else // if (*p == '.')
{
char_u *key_end = to_name_end(p + 1, TRUE);
char_u *key = vim_strnsave(p + 1, key_end - p - 1);
r = generate_PUSHS(cctx, key);
}
return r;
}
/*
* For a LHS with an index, load the variable to be indexed.
*/
static int
compile_load_lhs(
lhs_T *lhs,
char_u *var_start,
type_T *rhs_type,
cctx_T *cctx)
{
if (lhs->lhs_dest == dest_expr)
{
size_t varlen = lhs->lhs_varlen;
int c = var_start[varlen];
char_u *p = var_start;
garray_T *stack = &cctx->ctx_type_stack;
// Evaluate "ll[expr]" of "ll[expr][idx]"
var_start[varlen] = NUL;
if (compile_expr0(&p, cctx) == OK && p != var_start + varlen)
{
// this should not happen
emsg(_(e_missbrac));
var_start[varlen] = c;
return FAIL;
}
var_start[varlen] = c;
lhs->lhs_type = stack->ga_len == 0 ? &t_void
: ((type_T **)stack->ga_data)[stack->ga_len - 1];
// now we can properly check the type
if (rhs_type != NULL && lhs->lhs_type->tt_member != NULL
&& rhs_type != &t_void
&& need_type(rhs_type, lhs->lhs_type->tt_member, -2, 0, cctx,
FALSE, FALSE) == FAIL)
return FAIL;
}
else
generate_loadvar(cctx, lhs->lhs_dest, lhs->lhs_name,
lhs->lhs_lvar, lhs->lhs_type);
return OK;
}
/*
* Produce code for loading "lhs" and also take care of an index.
* Return OK/FAIL.
*/
static int
compile_load_lhs_with_index(lhs_T *lhs, char_u *var_start, cctx_T *cctx)
{
compile_load_lhs(lhs, var_start, NULL, cctx);
if (lhs->lhs_has_index)
{
int range = FALSE;
// Get member from list or dict. First compile the
// index value.
if (compile_assign_index(var_start, lhs, &range, cctx) == FAIL)
return FAIL;
if (range)
{
semsg(_(e_cannot_use_range_with_assignment_operator_str),
var_start);
return FAIL;
}
// Get the member.
if (compile_member(FALSE, cctx) == FAIL)
return FAIL;
}
return OK;
}
/*
* Assignment to a list or dict member, or ":unlet" for the item, using the
* information in "lhs".
* Returns OK or FAIL.
*/
static int
compile_assign_unlet(
char_u *var_start,
lhs_T *lhs,
int is_assign,
type_T *rhs_type,
cctx_T *cctx)
{
vartype_T dest_type;
garray_T *stack = &cctx->ctx_type_stack;
int range = FALSE;
if (compile_assign_index(var_start, lhs, &range, cctx) == FAIL)
return FAIL;
if (is_assign && range && lhs->lhs_type != &t_blob
&& lhs->lhs_type != &t_any)
{
semsg(_(e_cannot_use_range_with_assignment_str), var_start);
return FAIL;
}
if (lhs->lhs_type == &t_any)
{
// Index on variable of unknown type: check at runtime.
dest_type = VAR_ANY;
}
else
{
dest_type = lhs->lhs_type->tt_type;
if (dest_type == VAR_DICT && range)
{
emsg(e_cannot_use_range_with_dictionary);
return FAIL;
}
if (dest_type == VAR_DICT
&& may_generate_2STRING(-1, FALSE, cctx) == FAIL)
return FAIL;
if (dest_type == VAR_LIST || dest_type == VAR_BLOB)
{
type_T *type;
if (range)
{
type = ((type_T **)stack->ga_data)[stack->ga_len - 2];
if (need_type(type, &t_number,
-1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
}
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if ((dest_type != VAR_BLOB || type != &t_special)
&& need_type(type, &t_number,
-1, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
}
}
// Load the dict or list. On the stack we then have:
// - value (for assignment, not for :unlet)
// - index
// - for [a : b] second index
// - variable
if (compile_load_lhs(lhs, var_start, rhs_type, cctx) == FAIL)
return FAIL;
if (dest_type == VAR_LIST || dest_type == VAR_DICT
|| dest_type == VAR_BLOB || dest_type == VAR_ANY)
{
if (is_assign)
{
if (range)
{
if (generate_instr_drop(cctx, ISN_STORERANGE, 4) == NULL)
return FAIL;
}
else
{
isn_T *isn = generate_instr_drop(cctx, ISN_STOREINDEX, 3);
if (isn == NULL)
return FAIL;
isn->isn_arg.vartype = dest_type;
}
}
else if (range)
{
if (generate_instr_drop(cctx, ISN_UNLETRANGE, 3) == NULL)
return FAIL;
}
else
{
if (generate_instr_drop(cctx, ISN_UNLETINDEX, 2) == NULL)
return FAIL;
}
}
else
{
emsg(_(e_indexable_type_required));
return FAIL;
}
return OK;
}
/*
* Compile declaration and assignment:
* "let name"
* "var name = expr"
* "final name = expr"
* "const name = expr"
* "name = expr"
* "arg" points to "name".
* "++arg" and "--arg"
* Return NULL for an error.
* Return "arg" if it does not look like a variable list.
*/
static char_u *
compile_assignment(char_u *arg, exarg_T *eap, cmdidx_T cmdidx, cctx_T *cctx)
{
char_u *var_start;
char_u *p;
char_u *end = arg;
char_u *ret = NULL;
int var_count = 0;
int var_idx;
int semicolon = 0;
int did_generate_slice = FALSE;
garray_T *instr = &cctx->ctx_instr;
garray_T *stack = &cctx->ctx_type_stack;
char_u *op;
int oplen = 0;
int heredoc = FALSE;
int incdec = FALSE;
type_T *rhs_type = &t_any;
char_u *sp;
int is_decl = is_decl_command(cmdidx);
lhs_T lhs;
long start_lnum = SOURCING_LNUM;
// Skip over the "var" or "[var, var]" to get to any "=".
p = skip_var_list(arg, TRUE, &var_count, &semicolon, TRUE);
if (p == NULL)
return *arg == '[' ? arg : NULL;
if (var_count > 0 && is_decl)
{
// TODO: should we allow this, and figure out type inference from list
// members?
emsg(_(e_cannot_use_list_for_declaration));
return NULL;
}
lhs.lhs_name = NULL;
sp = p;
p = skipwhite(p);
op = p;
oplen = assignment_len(p, &heredoc);
if (var_count > 0 && oplen == 0)
// can be something like "[1, 2]->func()"
return arg;
if (oplen > 0 && (!VIM_ISWHITE(*sp) || !IS_WHITE_OR_NUL(op[oplen])))
{
error_white_both(op, oplen);
return NULL;
}
if (eap->cmdidx == CMD_increment || eap->cmdidx == CMD_decrement)
{
if (VIM_ISWHITE(eap->cmd[2]))
{
semsg(_(e_no_white_space_allowed_after_str_str),
eap->cmdidx == CMD_increment ? "++" : "--", eap->cmd);
return NULL;
}
op = (char_u *)(eap->cmdidx == CMD_increment ? "+=" : "-=");
oplen = 2;
incdec = TRUE;
}
if (heredoc)
{
list_T *l;
listitem_T *li;
// [let] varname =<< [trim] {end}
eap->getline = exarg_getline;
eap->cookie = cctx;
l = heredoc_get(eap, op + 3, FALSE);
if (l == NULL)
return NULL;
if (cctx->ctx_skip != SKIP_YES)
{
// Push each line and the create the list.
FOR_ALL_LIST_ITEMS(l, li)
{
generate_PUSHS(cctx, li->li_tv.vval.v_string);
li->li_tv.vval.v_string = NULL;
}
generate_NEWLIST(cctx, l->lv_len);
}
list_free(l);
p += STRLEN(p);
end = p;
}
else if (var_count > 0)
{
char_u *wp;
// for "[var, var] = expr" evaluate the expression here, loop over the
// list of variables below.
// A line break may follow the "=".
wp = op + oplen;
if (may_get_next_line_error(wp, &p, cctx) == FAIL)
return FAIL;
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
end = p;
if (cctx->ctx_skip != SKIP_YES)
{
type_T *stacktype;
stacktype = stack->ga_len == 0 ? &t_void
: ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (stacktype->tt_type == VAR_VOID)
{
emsg(_(e_cannot_use_void_value));
goto theend;
}
if (need_type(stacktype, &t_list_any, -1, 0, cctx,
FALSE, FALSE) == FAIL)
goto theend;
// TODO: check the length of a constant list here
generate_CHECKLEN(cctx, semicolon ? var_count - 1 : var_count,
semicolon);
if (stacktype->tt_member != NULL)
rhs_type = stacktype->tt_member;
}
}
/*
* Loop over variables in "[var, var] = expr".
* For "var = expr" and "let var: type" this is done only once.
*/
if (var_count > 0)
var_start = skipwhite(arg + 1); // skip over the "["
else
var_start = arg;
for (var_idx = 0; var_idx == 0 || var_idx < var_count; var_idx++)
{
int instr_count = -1;
int save_lnum;
if (var_start[0] == '_' && !eval_isnamec(var_start[1]))
{
// Ignore underscore in "[a, _, b] = list".
if (var_count > 0)
{
var_start = skipwhite(var_start + 2);
continue;
}
emsg(_(e_cannot_use_underscore_here));
goto theend;
}
vim_free(lhs.lhs_name);
/*
* Figure out the LHS type and other properties.
*/
if (compile_assign_lhs(var_start, &lhs, cmdidx,
is_decl, heredoc, oplen, cctx) == FAIL)
goto theend;
if (!heredoc)
{
if (cctx->ctx_skip == SKIP_YES)
{
if (oplen > 0 && var_count == 0)
{
// skip over the "=" and the expression
p = skipwhite(op + oplen);
(void)compile_expr0(&p, cctx);
}
}
else if (oplen > 0)
{
int is_const = FALSE;
char_u *wp;
// for "+=", "*=", "..=" etc. first load the current value
if (*op != '='
&& compile_load_lhs_with_index(&lhs, var_start,
cctx) == FAIL)
goto theend;
// For "var = expr" evaluate the expression.
if (var_count == 0)
{
int r;
// Compile the expression.
instr_count = instr->ga_len;
if (incdec)
{
r = generate_PUSHNR(cctx, 1);
}
else
{
// Temporarily hide the new local variable here, it is
// not available to this expression.
if (lhs.lhs_new_local)
--cctx->ctx_locals.ga_len;
wp = op + oplen;
if (may_get_next_line_error(wp, &p, cctx) == FAIL)
{
if (lhs.lhs_new_local)
++cctx->ctx_locals.ga_len;
goto theend;
}
r = compile_expr0_ext(&p, cctx, &is_const);
if (lhs.lhs_new_local)
++cctx->ctx_locals.ga_len;
if (r == FAIL)
goto theend;
}
}
else if (semicolon && var_idx == var_count - 1)
{
// For "[var; var] = expr" get the rest of the list
did_generate_slice = TRUE;
if (generate_SLICE(cctx, var_count - 1) == FAIL)
goto theend;
}
else
{
// For "[var, var] = expr" get the "var_idx" item from the
// list.
if (generate_GETITEM(cctx, var_idx, *op != '=') == FAIL)
goto theend;
}
rhs_type = stack->ga_len == 0 ? &t_void
: ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (lhs.lhs_lvar != NULL && (is_decl || !lhs.lhs_has_type))
{
if ((rhs_type->tt_type == VAR_FUNC
|| rhs_type->tt_type == VAR_PARTIAL)
&& !lhs.lhs_has_index
&& var_wrong_func_name(lhs.lhs_name, TRUE))
goto theend;
if (lhs.lhs_new_local && !lhs.lhs_has_type)
{
if (rhs_type->tt_type == VAR_VOID)
{
emsg(_(e_cannot_use_void_value));
goto theend;
}
else
{
// An empty list or dict has a &t_unknown member,
// for a variable that implies &t_any.
if (rhs_type == &t_list_empty)
lhs.lhs_lvar->lv_type = &t_list_any;
else if (rhs_type == &t_dict_empty)
lhs.lhs_lvar->lv_type = &t_dict_any;
else if (rhs_type == &t_unknown)
lhs.lhs_lvar->lv_type = &t_any;
else
lhs.lhs_lvar->lv_type = rhs_type;
}
}
else if (*op == '=')
{
type_T *use_type = lhs.lhs_lvar->lv_type;
// Without operator check type here, otherwise below.
// Use the line number of the assignment.
SOURCING_LNUM = start_lnum;
if (lhs.lhs_has_index)
use_type = lhs.lhs_member_type;
if (need_type(rhs_type, use_type, -1, 0, cctx,
FALSE, is_const) == FAIL)
goto theend;
}
}
else
{
type_T *lhs_type = lhs.lhs_member_type;
// Special case: assigning to @# can use a number or a
// string.
if (lhs_type == &t_number_or_string
&& rhs_type->tt_type == VAR_NUMBER)
lhs_type = &t_number;
if (*p != '=' && need_type(rhs_type, lhs_type,
-1, 0, cctx, FALSE, FALSE) == FAIL)
goto theend;
}
}
else if (cmdidx == CMD_final)
{
emsg(_(e_final_requires_a_value));
goto theend;
}
else if (cmdidx == CMD_const)
{
emsg(_(e_const_requires_a_value));
goto theend;
}
else if (!lhs.lhs_has_type || lhs.lhs_dest == dest_option)
{
emsg(_(e_type_or_initialization_required));
goto theend;
}
else
{
// variables are always initialized
if (ga_grow(instr, 1) == FAIL)
goto theend;
switch (lhs.lhs_member_type->tt_type)
{
case VAR_BOOL:
generate_PUSHBOOL(cctx, VVAL_FALSE);
break;
case VAR_FLOAT:
#ifdef FEAT_FLOAT
generate_PUSHF(cctx, 0.0);
#endif
break;
case VAR_STRING:
generate_PUSHS(cctx, NULL);
break;
case VAR_BLOB:
generate_PUSHBLOB(cctx, blob_alloc());
break;
case VAR_FUNC:
generate_PUSHFUNC(cctx, NULL, &t_func_void);
break;
case VAR_LIST:
generate_NEWLIST(cctx, 0);
break;
case VAR_DICT:
generate_NEWDICT(cctx, 0);
break;
case VAR_JOB:
generate_PUSHJOB(cctx, NULL);
break;
case VAR_CHANNEL:
generate_PUSHCHANNEL(cctx, NULL);
break;
case VAR_NUMBER:
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_PARTIAL:
case VAR_VOID:
case VAR_INSTR:
case VAR_SPECIAL: // cannot happen
generate_PUSHNR(cctx, 0);
break;
}
}
if (var_count == 0)
end = p;
}
// no need to parse more when skipping
if (cctx->ctx_skip == SKIP_YES)
break;
if (oplen > 0 && *op != '=')
{
type_T *expected;
type_T *stacktype;
if (*op == '.')
expected = &t_string;
else
expected = lhs.lhs_member_type;
stacktype = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (
#ifdef FEAT_FLOAT
// If variable is float operation with number is OK.
!(expected == &t_float && stacktype == &t_number) &&
#endif
need_type(stacktype, expected, -1, 0, cctx,
FALSE, FALSE) == FAIL)
goto theend;
if (*op == '.')
{
if (generate_instr_drop(cctx, ISN_CONCAT, 1) == NULL)
goto theend;
}
else if (*op == '+')
{
if (generate_add_instr(cctx,
operator_type(lhs.lhs_member_type, stacktype),
lhs.lhs_member_type, stacktype) == FAIL)
goto theend;
}
else if (generate_two_op(cctx, op) == FAIL)
goto theend;
}
// Use the line number of the assignment for store instruction.
save_lnum = cctx->ctx_lnum;
cctx->ctx_lnum = start_lnum - 1;
if (lhs.lhs_has_index)
{
// Use the info in "lhs" to store the value at the index in the
// list or dict.
if (compile_assign_unlet(var_start, &lhs, TRUE, rhs_type, cctx)
== FAIL)
{
cctx->ctx_lnum = save_lnum;
goto theend;
}
}
else
{
if (is_decl && cmdidx == CMD_const && (lhs.lhs_dest == dest_script
|| lhs.lhs_dest == dest_global
|| lhs.lhs_dest == dest_local))
// ":const var": lock the value, but not referenced variables
generate_LOCKCONST(cctx);
if (is_decl
&& (lhs.lhs_type->tt_type == VAR_DICT
|| lhs.lhs_type->tt_type == VAR_LIST)
&& lhs.lhs_type->tt_member != NULL
&& lhs.lhs_type->tt_member != &t_any
&& lhs.lhs_type->tt_member != &t_unknown)
// Set the type in the list or dict, so that it can be checked,
// also in legacy script.
generate_SETTYPE(cctx, lhs.lhs_type);
if (generate_store_lhs(cctx, &lhs, instr_count) == FAIL)
{
cctx->ctx_lnum = save_lnum;
goto theend;
}
}
cctx->ctx_lnum = save_lnum;
if (var_idx + 1 < var_count)
var_start = skipwhite(lhs.lhs_dest_end + 1);
}
// For "[var, var] = expr" drop the "expr" value.
// Also for "[var, var; _] = expr".
if (var_count > 0 && (!semicolon || !did_generate_slice))
{
if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL)
goto theend;
}
ret = skipwhite(end);
theend:
vim_free(lhs.lhs_name);
return ret;
}
/*
* Check for an assignment at "eap->cmd", compile it if found.
* Return NOTDONE if there is none, FAIL for failure, OK if done.
*/
static int
may_compile_assignment(exarg_T *eap, char_u **line, cctx_T *cctx)
{
char_u *pskip;
char_u *p;
// Assuming the command starts with a variable or function name,
// find what follows.
// Skip over "var.member", "var[idx]" and the like.
// Also "&opt = val", "$ENV = val" and "@r = val".
pskip = (*eap->cmd == '&' || *eap->cmd == '$' || *eap->cmd == '@')
? eap->cmd + 1 : eap->cmd;
p = to_name_end(pskip, TRUE);
if (p > eap->cmd && *p != NUL)
{
char_u *var_end;
int oplen;
int heredoc;
if (eap->cmd[0] == '@')
var_end = eap->cmd + 2;
else
var_end = find_name_end(pskip, NULL, NULL,
FNE_CHECK_START | FNE_INCL_BR);
oplen = assignment_len(skipwhite(var_end), &heredoc);
if (oplen > 0)
{
size_t len = p - eap->cmd;
// Recognize an assignment if we recognize the variable
// name:
// "g:var = expr"
// "local = expr" where "local" is a local var.
// "script = expr" where "script" is a script-local var.
// "import = expr" where "import" is an imported var
// "&opt = expr"
// "$ENV = expr"
// "@r = expr"
if (*eap->cmd == '&'
|| *eap->cmd == '$'
|| *eap->cmd == '@'
|| ((len) > 2 && eap->cmd[1] == ':')
|| variable_exists(eap->cmd, len, cctx))
{
*line = compile_assignment(eap->cmd, eap, CMD_SIZE, cctx);
if (*line == NULL || *line == eap->cmd)
return FAIL;
return OK;
}
}
}
if (*eap->cmd == '[')
{
// [var, var] = expr
*line = compile_assignment(eap->cmd, eap, CMD_SIZE, cctx);
if (*line == NULL)
return FAIL;
if (*line != eap->cmd)
return OK;
}
return NOTDONE;
}
/*
* Check if "name" can be "unlet".
*/
int
check_vim9_unlet(char_u *name)
{
if (name[1] != ':' || vim_strchr((char_u *)"gwtb", *name) == NULL)
{
// "unlet s:var" is allowed in legacy script.
if (*name == 's' && !script_is_vim9())
return OK;
semsg(_(e_cannot_unlet_str), name);
return FAIL;
}
return OK;
}
/*
* Callback passed to ex_unletlock().
*/
static int
compile_unlet(
lval_T *lvp,
char_u *name_end,
exarg_T *eap,
int deep UNUSED,
void *coookie)
{
cctx_T *cctx = coookie;
char_u *p = lvp->ll_name;
int cc = *name_end;
int ret = OK;
if (cctx->ctx_skip == SKIP_YES)
return OK;
*name_end = NUL;
if (*p == '$')
{
// :unlet $ENV_VAR
ret = generate_UNLET(cctx, ISN_UNLETENV, p + 1, eap->forceit);
}
else if (vim_strchr(p, '.') != NULL || vim_strchr(p, '[') != NULL)
{
lhs_T lhs;
// This is similar to assigning: lookup the list/dict, compile the
// idx/key. Then instead of storing the value unlet the item.
// unlet {list}[idx]
// unlet {dict}[key] dict.key
//
// Figure out the LHS type and other properties.
//
ret = compile_lhs(p, &lhs, CMD_unlet, FALSE, 0, cctx);
// : unlet an indexed item
if (!lhs.lhs_has_index)
{
iemsg("called compile_lhs() without an index");
ret = FAIL;
}
else
{
// Use the info in "lhs" to unlet the item at the index in the
// list or dict.
ret = compile_assign_unlet(p, &lhs, FALSE, &t_void, cctx);
}
vim_free(lhs.lhs_name);
}
else if (check_vim9_unlet(p) == FAIL)
{
ret = FAIL;
}
else
{
// Normal name. Only supports g:, w:, t: and b: namespaces.
ret = generate_UNLET(cctx, ISN_UNLET, p, eap->forceit);
}
*name_end = cc;
return ret;
}
/*
* Callback passed to ex_unletlock().
*/
static int
compile_lock_unlock(
lval_T *lvp,
char_u *name_end,
exarg_T *eap,
int deep UNUSED,
void *coookie)
{
cctx_T *cctx = coookie;
int cc = *name_end;
char_u *p = lvp->ll_name;
int ret = OK;
size_t len;
char_u *buf;
if (cctx->ctx_skip == SKIP_YES)
return OK;
// Cannot use :lockvar and :unlockvar on local variables.
if (p[1] != ':')
{
char_u *end = skip_var_one(p, FALSE);
if (lookup_local(p, end - p, NULL, cctx) == OK)
{
emsg(_(e_cannot_lock_unlock_local_variable));
return FAIL;
}
}
// Checking is done at runtime.
*name_end = NUL;
len = name_end - p + 20;
buf = alloc(len);
if (buf == NULL)
ret = FAIL;
else
{
vim_snprintf((char *)buf, len, "%s %s",
eap->cmdidx == CMD_lockvar ? "lockvar" : "unlockvar",
p);
ret = generate_EXEC(cctx, buf);
vim_free(buf);
*name_end = cc;
}
return ret;
}
/*
* compile "unlet var", "lock var" and "unlock var"
* "arg" points to "var".
*/
static char_u *
compile_unletlock(char_u *arg, exarg_T *eap, cctx_T *cctx)
{
ex_unletlock(eap, arg, 0, GLV_NO_AUTOLOAD | GLV_COMPILING,
eap->cmdidx == CMD_unlet ? compile_unlet : compile_lock_unlock,
cctx);
return eap->nextcmd == NULL ? (char_u *)"" : eap->nextcmd;
}
/*
* Compile an :import command.
*/
static char_u *
compile_import(char_u *arg, cctx_T *cctx)
{
return handle_import(arg, &cctx->ctx_imports, 0, NULL, cctx);
}
/*
* generate a jump to the ":endif"/":endfor"/":endwhile"/":finally"/":endtry".
*/
static int
compile_jump_to_end(endlabel_T **el, jumpwhen_T when, cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
endlabel_T *endlabel = ALLOC_CLEAR_ONE(endlabel_T);
if (endlabel == NULL)
return FAIL;
endlabel->el_next = *el;
*el = endlabel;
endlabel->el_end_label = instr->ga_len;
generate_JUMP(cctx, when, 0);
return OK;
}
static void
compile_fill_jump_to_end(endlabel_T **el, int jump_where, cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
while (*el != NULL)
{
endlabel_T *cur = (*el);
isn_T *isn;
isn = ((isn_T *)instr->ga_data) + cur->el_end_label;
isn->isn_arg.jump.jump_where = jump_where;
*el = cur->el_next;
vim_free(cur);
}
}
static void
compile_free_jump_to_end(endlabel_T **el)
{
while (*el != NULL)
{
endlabel_T *cur = (*el);
*el = cur->el_next;
vim_free(cur);
}
}
/*
* Create a new scope and set up the generic items.
*/
static scope_T *
new_scope(cctx_T *cctx, scopetype_T type)
{
scope_T *scope = ALLOC_CLEAR_ONE(scope_T);
if (scope == NULL)
return NULL;
scope->se_outer = cctx->ctx_scope;
cctx->ctx_scope = scope;
scope->se_type = type;
scope->se_local_count = cctx->ctx_locals.ga_len;
return scope;
}
/*
* Free the current scope and go back to the outer scope.
*/
static void
drop_scope(cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
if (scope == NULL)
{
iemsg("calling drop_scope() without a scope");
return;
}
cctx->ctx_scope = scope->se_outer;
switch (scope->se_type)
{
case IF_SCOPE:
compile_free_jump_to_end(&scope->se_u.se_if.is_end_label); break;
case FOR_SCOPE:
compile_free_jump_to_end(&scope->se_u.se_for.fs_end_label); break;
case WHILE_SCOPE:
compile_free_jump_to_end(&scope->se_u.se_while.ws_end_label); break;
case TRY_SCOPE:
compile_free_jump_to_end(&scope->se_u.se_try.ts_end_label); break;
case NO_SCOPE:
case BLOCK_SCOPE:
break;
}
vim_free(scope);
}
/*
* compile "if expr"
*
* "if expr" Produces instructions:
* EVAL expr Push result of "expr"
* JUMP_IF_FALSE end
* ... body ...
* end:
*
* "if expr | else" Produces instructions:
* EVAL expr Push result of "expr"
* JUMP_IF_FALSE else
* ... body ...
* JUMP_ALWAYS end
* else:
* ... body ...
* end:
*
* "if expr1 | elseif expr2 | else" Produces instructions:
* EVAL expr Push result of "expr"
* JUMP_IF_FALSE elseif
* ... body ...
* JUMP_ALWAYS end
* elseif:
* EVAL expr Push result of "expr"
* JUMP_IF_FALSE else
* ... body ...
* JUMP_ALWAYS end
* else:
* ... body ...
* end:
*/
static char_u *
compile_if(char_u *arg, cctx_T *cctx)
{
char_u *p = arg;
garray_T *instr = &cctx->ctx_instr;
int instr_count = instr->ga_len;
scope_T *scope;
skip_T skip_save = cctx->ctx_skip;
ppconst_T ppconst;
CLEAR_FIELD(ppconst);
if (compile_expr1(&p, cctx, &ppconst) == FAIL)
{
clear_ppconst(&ppconst);
return NULL;
}
if (!ends_excmd2(arg, skipwhite(p)))
{
semsg(_(e_trailing_arg), p);
return NULL;
}
if (cctx->ctx_skip == SKIP_YES)
clear_ppconst(&ppconst);
else if (instr->ga_len == instr_count && ppconst.pp_used == 1)
{
int error = FALSE;
int v;
// The expression results in a constant.
v = tv_get_bool_chk(&ppconst.pp_tv[0], &error);
clear_ppconst(&ppconst);
if (error)
return NULL;
cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES;
}
else
{
// Not a constant, generate instructions for the expression.
cctx->ctx_skip = SKIP_UNKNOWN;
if (generate_ppconst(cctx, &ppconst) == FAIL)
return NULL;
if (bool_on_stack(cctx) == FAIL)
return NULL;
}
// CMDMOD_REV must come before the jump
generate_undo_cmdmods(cctx);
scope = new_scope(cctx, IF_SCOPE);
if (scope == NULL)
return NULL;
scope->se_skip_save = skip_save;
// "is_had_return" will be reset if any block does not end in :return
scope->se_u.se_if.is_had_return = TRUE;
if (cctx->ctx_skip == SKIP_UNKNOWN)
{
// "where" is set when ":elseif", "else" or ":endif" is found
scope->se_u.se_if.is_if_label = instr->ga_len;
generate_JUMP(cctx, JUMP_IF_FALSE, 0);
}
else
scope->se_u.se_if.is_if_label = -1;
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE && cctx->ctx_skip == SKIP_YES
&& skip_save != SKIP_YES)
{
// generated a profile start, need to generate a profile end, since it
// won't be done after returning
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_END);
cctx->ctx_skip = SKIP_YES;
}
#endif
return p;
}
static char_u *
compile_elseif(char_u *arg, cctx_T *cctx)
{
char_u *p = arg;
garray_T *instr = &cctx->ctx_instr;
int instr_count = instr->ga_len;
isn_T *isn;
scope_T *scope = cctx->ctx_scope;
ppconst_T ppconst;
skip_T save_skip = cctx->ctx_skip;
if (scope == NULL || scope->se_type != IF_SCOPE)
{
emsg(_(e_elseif_without_if));
return NULL;
}
unwind_locals(cctx, scope->se_local_count);
if (!cctx->ctx_had_return)
scope->se_u.se_if.is_had_return = FALSE;
if (cctx->ctx_skip == SKIP_NOT)
{
// previous block was executed, this one and following will not
cctx->ctx_skip = SKIP_YES;
scope->se_u.se_if.is_seen_skip_not = TRUE;
}
if (scope->se_u.se_if.is_seen_skip_not)
{
// A previous block was executed, skip over expression and bail out.
// Do not count the "elseif" for profiling and cmdmod
instr->ga_len = current_instr_idx(cctx);
skip_expr_cctx(&p, cctx);
return p;
}
if (cctx->ctx_skip == SKIP_UNKNOWN)
{
int moved_cmdmod = FALSE;
// Move any CMDMOD instruction to after the jump
if (((isn_T *)instr->ga_data)[instr->ga_len - 1].isn_type == ISN_CMDMOD)
{
if (ga_grow(instr, 1) == FAIL)
return NULL;
((isn_T *)instr->ga_data)[instr->ga_len] =
((isn_T *)instr->ga_data)[instr->ga_len - 1];
--instr->ga_len;
moved_cmdmod = TRUE;
}
if (compile_jump_to_end(&scope->se_u.se_if.is_end_label,
JUMP_ALWAYS, cctx) == FAIL)
return NULL;
// previous "if" or "elseif" jumps here
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label;
isn->isn_arg.jump.jump_where = instr->ga_len;
if (moved_cmdmod)
++instr->ga_len;
}
// compile "expr"; if we know it evaluates to FALSE skip the block
CLEAR_FIELD(ppconst);
if (cctx->ctx_skip == SKIP_YES)
{
cctx->ctx_skip = SKIP_UNKNOWN;
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE)
{
// the previous block was skipped, need to profile this line
generate_instr(cctx, ISN_PROF_START);
instr_count = instr->ga_len;
}
#endif
if (cctx->ctx_compile_type == CT_DEBUG)
{
// the previous block was skipped, may want to debug this line
generate_instr_debug(cctx);
instr_count = instr->ga_len;
}
}
if (compile_expr1(&p, cctx, &ppconst) == FAIL)
{
clear_ppconst(&ppconst);
return NULL;
}
cctx->ctx_skip = save_skip;
if (!ends_excmd2(arg, skipwhite(p)))
{
semsg(_(e_trailing_arg), p);
return NULL;
}
if (scope->se_skip_save == SKIP_YES)
clear_ppconst(&ppconst);
else if (instr->ga_len == instr_count && ppconst.pp_used == 1)
{
int error = FALSE;
int v;
// The expression results in a constant.
// TODO: how about nesting?
v = tv_get_bool_chk(&ppconst.pp_tv[0], &error);
if (error)
return NULL;
cctx->ctx_skip = v ? SKIP_NOT : SKIP_YES;
clear_ppconst(&ppconst);
scope->se_u.se_if.is_if_label = -1;
}
else
{
// Not a constant, generate instructions for the expression.
cctx->ctx_skip = SKIP_UNKNOWN;
if (generate_ppconst(cctx, &ppconst) == FAIL)
return NULL;
if (bool_on_stack(cctx) == FAIL)
return NULL;
// CMDMOD_REV must come before the jump
generate_undo_cmdmods(cctx);
// "where" is set when ":elseif", "else" or ":endif" is found
scope->se_u.se_if.is_if_label = instr->ga_len;
generate_JUMP(cctx, JUMP_IF_FALSE, 0);
}
return p;
}
static char_u *
compile_else(char_u *arg, cctx_T *cctx)
{
char_u *p = arg;
garray_T *instr = &cctx->ctx_instr;
isn_T *isn;
scope_T *scope = cctx->ctx_scope;
if (scope == NULL || scope->se_type != IF_SCOPE)
{
emsg(_(e_else_without_if));
return NULL;
}
unwind_locals(cctx, scope->se_local_count);
if (!cctx->ctx_had_return)
scope->se_u.se_if.is_had_return = FALSE;
scope->se_u.se_if.is_seen_else = TRUE;
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE)
{
if (cctx->ctx_skip == SKIP_NOT
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_PROF_START)
// the previous block was executed, do not count "else" for
// profiling
--instr->ga_len;
if (cctx->ctx_skip == SKIP_YES && !scope->se_u.se_if.is_seen_skip_not)
{
// the previous block was not executed, this one will, do count the
// "else" for profiling
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_END);
generate_instr(cctx, ISN_PROF_START);
cctx->ctx_skip = SKIP_YES;
}
}
#endif
if (!scope->se_u.se_if.is_seen_skip_not && scope->se_skip_save != SKIP_YES)
{
// jump from previous block to the end, unless the else block is empty
if (cctx->ctx_skip == SKIP_UNKNOWN)
{
if (!cctx->ctx_had_return
&& compile_jump_to_end(&scope->se_u.se_if.is_end_label,
JUMP_ALWAYS, cctx) == FAIL)
return NULL;
}
if (cctx->ctx_skip == SKIP_UNKNOWN)
{
if (scope->se_u.se_if.is_if_label >= 0)
{
// previous "if" or "elseif" jumps here
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label;
isn->isn_arg.jump.jump_where = instr->ga_len;
scope->se_u.se_if.is_if_label = -1;
}
}
if (cctx->ctx_skip != SKIP_UNKNOWN)
cctx->ctx_skip = cctx->ctx_skip == SKIP_YES ? SKIP_NOT : SKIP_YES;
}
return p;
}
static char_u *
compile_endif(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
ifscope_T *ifscope;
garray_T *instr = &cctx->ctx_instr;
isn_T *isn;
if (misplaced_cmdmod(cctx))
return NULL;
if (scope == NULL || scope->se_type != IF_SCOPE)
{
emsg(_(e_endif_without_if));
return NULL;
}
ifscope = &scope->se_u.se_if;
unwind_locals(cctx, scope->se_local_count);
if (!cctx->ctx_had_return)
ifscope->is_had_return = FALSE;
if (scope->se_u.se_if.is_if_label >= 0)
{
// previous "if" or "elseif" jumps here
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_if.is_if_label;
isn->isn_arg.jump.jump_where = instr->ga_len;
}
// Fill in the "end" label in jumps at the end of the blocks.
compile_fill_jump_to_end(&ifscope->is_end_label, instr->ga_len, cctx);
#ifdef FEAT_PROFILE
// even when skipping we count the endif as executed, unless the block it's
// in is skipped
if (cctx->ctx_compile_type == CT_PROFILE && cctx->ctx_skip == SKIP_YES
&& scope->se_skip_save != SKIP_YES)
{
cctx->ctx_skip = SKIP_NOT;
generate_instr(cctx, ISN_PROF_START);
}
#endif
cctx->ctx_skip = scope->se_skip_save;
// If all the blocks end in :return and there is an :else then the
// had_return flag is set.
cctx->ctx_had_return = ifscope->is_had_return && ifscope->is_seen_else;
drop_scope(cctx);
return arg;
}
/*
* Compile "for var in expr":
*
* Produces instructions:
* PUSHNR -1
* STORE loop-idx Set index to -1
* EVAL expr result of "expr" on top of stack
* top: FOR loop-idx, end Increment index, use list on bottom of stack
* - if beyond end, jump to "end"
* - otherwise get item from list and push it
* STORE var Store item in "var"
* ... body ...
* JUMP top Jump back to repeat
* end: DROP Drop the result of "expr"
*
* Compile "for [var1, var2] in expr" - as above, but instead of "STORE var":
* UNPACK 2 Split item in 2
* STORE var1 Store item in "var1"
* STORE var2 Store item in "var2"
*/
static char_u *
compile_for(char_u *arg_start, cctx_T *cctx)
{
char_u *arg;
char_u *arg_end;
char_u *name = NULL;
char_u *p;
char_u *wp;
int var_count = 0;
int var_list = FALSE;
int semicolon = FALSE;
size_t varlen;
garray_T *stack = &cctx->ctx_type_stack;
garray_T *instr = &cctx->ctx_instr;
scope_T *scope;
lvar_T *loop_lvar; // loop iteration variable
lvar_T *var_lvar; // variable for "var"
type_T *vartype;
type_T *item_type = &t_any;
int idx;
int prev_lnum = cctx->ctx_prev_lnum;
p = skip_var_list(arg_start, TRUE, &var_count, &semicolon, FALSE);
if (p == NULL)
return NULL;
if (var_count == 0)
var_count = 1;
else
var_list = TRUE; // can also be a list of one variable
// consume "in"
wp = p;
if (may_get_next_line_error(wp, &p, cctx) == FAIL)
return NULL;
if (STRNCMP(p, "in", 2) != 0 || !IS_WHITE_OR_NUL(p[2]))
{
emsg(_(e_missing_in));
return NULL;
}
wp = p + 2;
if (may_get_next_line_error(wp, &p, cctx) == FAIL)
return NULL;
// Remove the already generated ISN_DEBUG, it is written below the ISN_FOR
// instruction.
if (cctx->ctx_compile_type == CT_DEBUG && instr->ga_len > 0
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_DEBUG)
{
--instr->ga_len;
prev_lnum = ((isn_T *)instr->ga_data)[instr->ga_len]
.isn_arg.debug.dbg_break_lnum;
}
scope = new_scope(cctx, FOR_SCOPE);
if (scope == NULL)
return NULL;
// Reserve a variable to store the loop iteration counter and initialize it
// to -1.
loop_lvar = reserve_local(cctx, (char_u *)"", 0, FALSE, &t_number);
if (loop_lvar == NULL)
{
// out of memory
drop_scope(cctx);
return NULL;
}
generate_STORENR(cctx, loop_lvar->lv_idx, -1);
// compile "expr", it remains on the stack until "endfor"
arg = p;
if (compile_expr0(&arg, cctx) == FAIL)
{
drop_scope(cctx);
return NULL;
}
arg_end = arg;
// If we know the type of "var" and it is a not a supported type we can
// give an error now.
vartype = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (vartype->tt_type != VAR_LIST && vartype->tt_type != VAR_STRING
&& vartype->tt_type != VAR_BLOB && vartype->tt_type != VAR_ANY)
{
semsg(_(e_for_loop_on_str_not_supported),
vartype_name(vartype->tt_type));
drop_scope(cctx);
return NULL;
}
if (vartype->tt_type == VAR_STRING)
item_type = &t_string;
else if (vartype->tt_type == VAR_BLOB)
item_type = &t_number;
else if (vartype->tt_type == VAR_LIST
&& vartype->tt_member->tt_type != VAR_ANY)
{
if (!var_list)
item_type = vartype->tt_member;
else if (vartype->tt_member->tt_type == VAR_LIST
&& vartype->tt_member->tt_member->tt_type != VAR_ANY)
// TODO: should get the type for each lhs
item_type = vartype->tt_member->tt_member;
}
// CMDMOD_REV must come before the FOR instruction.
generate_undo_cmdmods(cctx);
// "for_end" is set when ":endfor" is found
scope->se_u.se_for.fs_top_label = current_instr_idx(cctx);
generate_FOR(cctx, loop_lvar->lv_idx);
arg = arg_start;
if (var_list)
{
generate_UNPACK(cctx, var_count, semicolon);
arg = skipwhite(arg + 1); // skip white after '['
// the list item is replaced by a number of items
if (ga_grow(stack, var_count - 1) == FAIL)
{
drop_scope(cctx);
return NULL;
}
--stack->ga_len;
for (idx = 0; idx < var_count; ++idx)
{
((type_T **)stack->ga_data)[stack->ga_len] =
(semicolon && idx == 0) ? vartype : item_type;
++stack->ga_len;
}
}
for (idx = 0; idx < var_count; ++idx)
{
assign_dest_T dest = dest_local;
int opt_flags = 0;
int vimvaridx = -1;
type_T *type = &t_any;
type_T *lhs_type = &t_any;
where_T where;
p = skip_var_one(arg, FALSE);
varlen = p - arg;
name = vim_strnsave(arg, varlen);
if (name == NULL)
goto failed;
if (*p == ':')
{
p = skipwhite(p + 1);
lhs_type = parse_type(&p, cctx->ctx_type_list, TRUE);
}
// TODO: script var not supported?
if (get_var_dest(name, &dest, CMD_for, &opt_flags,
&vimvaridx, &type, cctx) == FAIL)
goto failed;
if (dest != dest_local)
{
if (generate_store_var(cctx, dest, opt_flags, vimvaridx,
0, 0, type, name) == FAIL)
goto failed;
}
else if (varlen == 1 && *arg == '_')
{
// Assigning to "_": drop the value.
if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL)
goto failed;
}
else
{
if (lookup_local(arg, varlen, NULL, cctx) == OK)
{
semsg(_(e_variable_already_declared), arg);
goto failed;
}
if (STRNCMP(name, "s:", 2) == 0)
{
semsg(_(e_cannot_declare_script_variable_in_function), name);
goto failed;
}
// Reserve a variable to store "var".
where.wt_index = var_list ? idx + 1 : 0;
where.wt_variable = TRUE;
if (lhs_type == &t_any)
lhs_type = item_type;
else if (item_type != &t_unknown
&& !(var_list && item_type == &t_any)
&& check_type(lhs_type, item_type, TRUE, where) == FAIL)
goto failed;
var_lvar = reserve_local(cctx, arg, varlen, TRUE, lhs_type);
if (var_lvar == NULL)
// out of memory or used as an argument
goto failed;
if (semicolon && idx == var_count - 1)
var_lvar->lv_type = vartype;
else
var_lvar->lv_type = item_type;
generate_STORE(cctx, ISN_STORE, var_lvar->lv_idx, NULL);
}
if (*p == ',' || *p == ';')
++p;
arg = skipwhite(p);
vim_free(name);
}
if (cctx->ctx_compile_type == CT_DEBUG)
{
int save_prev_lnum = cctx->ctx_prev_lnum;
// Add ISN_DEBUG here, so that the loop variables can be inspected.
// Use the prev_lnum from the ISN_DEBUG instruction removed above.
cctx->ctx_prev_lnum = prev_lnum;
generate_instr_debug(cctx);
cctx->ctx_prev_lnum = save_prev_lnum;
}
return arg_end;
failed:
vim_free(name);
drop_scope(cctx);
return NULL;
}
/*
* compile "endfor"
*/
static char_u *
compile_endfor(char_u *arg, cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
scope_T *scope = cctx->ctx_scope;
forscope_T *forscope;
isn_T *isn;
if (misplaced_cmdmod(cctx))
return NULL;
if (scope == NULL || scope->se_type != FOR_SCOPE)
{
emsg(_(e_for));
return NULL;
}
forscope = &scope->se_u.se_for;
cctx->ctx_scope = scope->se_outer;
unwind_locals(cctx, scope->se_local_count);
// At end of ":for" scope jump back to the FOR instruction.
generate_JUMP(cctx, JUMP_ALWAYS, forscope->fs_top_label);
// Fill in the "end" label in the FOR statement so it can jump here.
isn = ((isn_T *)instr->ga_data) + forscope->fs_top_label;
isn->isn_arg.forloop.for_end = instr->ga_len;
// Fill in the "end" label any BREAK statements
compile_fill_jump_to_end(&forscope->fs_end_label, instr->ga_len, cctx);
// Below the ":for" scope drop the "expr" list from the stack.
if (generate_instr_drop(cctx, ISN_DROP, 1) == NULL)
return NULL;
vim_free(scope);
return arg;
}
/*
* compile "while expr"
*
* Produces instructions:
* top: EVAL expr Push result of "expr"
* JUMP_IF_FALSE end jump if false
* ... body ...
* JUMP top Jump back to repeat
* end:
*
*/
static char_u *
compile_while(char_u *arg, cctx_T *cctx)
{
char_u *p = arg;
scope_T *scope;
scope = new_scope(cctx, WHILE_SCOPE);
if (scope == NULL)
return NULL;
// "endwhile" jumps back here, one before when profiling or using cmdmods
scope->se_u.se_while.ws_top_label = current_instr_idx(cctx);
// compile "expr"
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
if (!ends_excmd2(arg, skipwhite(p)))
{
semsg(_(e_trailing_arg), p);
return NULL;
}
if (bool_on_stack(cctx) == FAIL)
return FAIL;
// CMDMOD_REV must come before the jump
generate_undo_cmdmods(cctx);
// "while_end" is set when ":endwhile" is found
if (compile_jump_to_end(&scope->se_u.se_while.ws_end_label,
JUMP_IF_FALSE, cctx) == FAIL)
return FAIL;
return p;
}
/*
* compile "endwhile"
*/
static char_u *
compile_endwhile(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
garray_T *instr = &cctx->ctx_instr;
if (misplaced_cmdmod(cctx))
return NULL;
if (scope == NULL || scope->se_type != WHILE_SCOPE)
{
emsg(_(e_while));
return NULL;
}
cctx->ctx_scope = scope->se_outer;
unwind_locals(cctx, scope->se_local_count);
#ifdef FEAT_PROFILE
// count the endwhile before jumping
may_generate_prof_end(cctx, cctx->ctx_lnum);
#endif
// At end of ":for" scope jump back to the FOR instruction.
generate_JUMP(cctx, JUMP_ALWAYS, scope->se_u.se_while.ws_top_label);
// Fill in the "end" label in the WHILE statement so it can jump here.
// And in any jumps for ":break"
compile_fill_jump_to_end(&scope->se_u.se_while.ws_end_label,
instr->ga_len, cctx);
vim_free(scope);
return arg;
}
/*
* compile "continue"
*/
static char_u *
compile_continue(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
int try_scopes = 0;
int loop_label;
for (;;)
{
if (scope == NULL)
{
emsg(_(e_continue));
return NULL;
}
if (scope->se_type == FOR_SCOPE)
{
loop_label = scope->se_u.se_for.fs_top_label;
break;
}
if (scope->se_type == WHILE_SCOPE)
{
loop_label = scope->se_u.se_while.ws_top_label;
break;
}
if (scope->se_type == TRY_SCOPE)
++try_scopes;
scope = scope->se_outer;
}
if (try_scopes > 0)
// Inside one or more try/catch blocks we first need to jump to the
// "finally" or "endtry" to cleanup.
generate_TRYCONT(cctx, try_scopes, loop_label);
else
// Jump back to the FOR or WHILE instruction.
generate_JUMP(cctx, JUMP_ALWAYS, loop_label);
return arg;
}
/*
* compile "break"
*/
static char_u *
compile_break(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
endlabel_T **el;
for (;;)
{
if (scope == NULL)
{
emsg(_(e_break));
return NULL;
}
if (scope->se_type == FOR_SCOPE || scope->se_type == WHILE_SCOPE)
break;
scope = scope->se_outer;
}
// Jump to the end of the FOR or WHILE loop.
if (scope->se_type == FOR_SCOPE)
el = &scope->se_u.se_for.fs_end_label;
else
el = &scope->se_u.se_while.ws_end_label;
if (compile_jump_to_end(el, JUMP_ALWAYS, cctx) == FAIL)
return FAIL;
return arg;
}
/*
* compile "{" start of block
*/
static char_u *
compile_block(char_u *arg, cctx_T *cctx)
{
if (new_scope(cctx, BLOCK_SCOPE) == NULL)
return NULL;
return skipwhite(arg + 1);
}
/*
* compile end of block: drop one scope
*/
static void
compile_endblock(cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
cctx->ctx_scope = scope->se_outer;
unwind_locals(cctx, scope->se_local_count);
vim_free(scope);
}
/*
* compile "try"
* Creates a new scope for the try-endtry, pointing to the first catch and
* finally.
* Creates another scope for the "try" block itself.
* TRY instruction sets up exception handling at runtime.
*
* "try"
* TRY -> catch1, -> finally push trystack entry
* ... try block
* "throw {exception}"
* EVAL {exception}
* THROW create exception
* ... try block
* " catch {expr}"
* JUMP -> finally
* catch1: PUSH exception
* EVAL {expr}
* MATCH
* JUMP nomatch -> catch2
* CATCH remove exception
* ... catch block
* " catch"
* JUMP -> finally
* catch2: CATCH remove exception
* ... catch block
* " finally"
* finally:
* ... finally block
* " endtry"
* ENDTRY pop trystack entry, may rethrow
*/
static char_u *
compile_try(char_u *arg, cctx_T *cctx)
{
garray_T *instr = &cctx->ctx_instr;
scope_T *try_scope;
scope_T *scope;
if (misplaced_cmdmod(cctx))
return NULL;
// scope that holds the jumps that go to catch/finally/endtry
try_scope = new_scope(cctx, TRY_SCOPE);
if (try_scope == NULL)
return NULL;
if (cctx->ctx_skip != SKIP_YES)
{
isn_T *isn;
// "try_catch" is set when the first ":catch" is found or when no catch
// is found and ":finally" is found.
// "try_finally" is set when ":finally" is found
// "try_endtry" is set when ":endtry" is found
try_scope->se_u.se_try.ts_try_label = instr->ga_len;
if ((isn = generate_instr(cctx, ISN_TRY)) == NULL)
return NULL;
isn->isn_arg.try.try_ref = ALLOC_CLEAR_ONE(tryref_T);
if (isn->isn_arg.try.try_ref == NULL)
return NULL;
}
// scope for the try block itself
scope = new_scope(cctx, BLOCK_SCOPE);
if (scope == NULL)
return NULL;
return arg;
}
/*
* compile "catch {expr}"
*/
static char_u *
compile_catch(char_u *arg, cctx_T *cctx UNUSED)
{
scope_T *scope = cctx->ctx_scope;
garray_T *instr = &cctx->ctx_instr;
char_u *p;
isn_T *isn;
if (misplaced_cmdmod(cctx))
return NULL;
// end block scope from :try or :catch
if (scope != NULL && scope->se_type == BLOCK_SCOPE)
compile_endblock(cctx);
scope = cctx->ctx_scope;
// Error if not in a :try scope
if (scope == NULL || scope->se_type != TRY_SCOPE)
{
emsg(_(e_catch));
return NULL;
}
if (scope->se_u.se_try.ts_caught_all)
{
emsg(_(e_catch_unreachable_after_catch_all));
return NULL;
}
if (cctx->ctx_skip != SKIP_YES)
{
#ifdef FEAT_PROFILE
// the profile-start should be after the jump
if (cctx->ctx_compile_type == CT_PROFILE
&& instr->ga_len > 0
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_PROF_START)
--instr->ga_len;
#endif
// Jump from end of previous block to :finally or :endtry
if (compile_jump_to_end(&scope->se_u.se_try.ts_end_label,
JUMP_ALWAYS, cctx) == FAIL)
return NULL;
// End :try or :catch scope: set value in ISN_TRY instruction
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label;
if (isn->isn_arg.try.try_ref->try_catch == 0)
isn->isn_arg.try.try_ref->try_catch = instr->ga_len;
if (scope->se_u.se_try.ts_catch_label != 0)
{
// Previous catch without match jumps here
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_catch_label;
isn->isn_arg.jump.jump_where = instr->ga_len;
}
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE)
{
// a "throw" that jumps here needs to be counted
generate_instr(cctx, ISN_PROF_END);
// the "catch" is also counted
generate_instr(cctx, ISN_PROF_START);
}
#endif
if (cctx->ctx_compile_type == CT_DEBUG)
generate_instr_debug(cctx);
}
p = skipwhite(arg);
if (ends_excmd2(arg, p))
{
scope->se_u.se_try.ts_caught_all = TRUE;
scope->se_u.se_try.ts_catch_label = 0;
}
else
{
char_u *end;
char_u *pat;
char_u *tofree = NULL;
int dropped = 0;
int len;
// Push v:exception, push {expr} and MATCH
generate_instr_type(cctx, ISN_PUSHEXC, &t_string);
end = skip_regexp_ex(p + 1, *p, TRUE, &tofree, &dropped, NULL);
if (*end != *p)
{
semsg(_(e_separator_mismatch_str), p);
vim_free(tofree);
return FAIL;
}
if (tofree == NULL)
len = (int)(end - (p + 1));
else
len = (int)(end - tofree);
pat = vim_strnsave(tofree == NULL ? p + 1 : tofree, len);
vim_free(tofree);
p += len + 2 + dropped;
if (pat == NULL)
return FAIL;
if (generate_PUSHS(cctx, pat) == FAIL)
return FAIL;
if (generate_COMPARE(cctx, EXPR_MATCH, FALSE) == FAIL)
return NULL;
scope->se_u.se_try.ts_catch_label = instr->ga_len;
if (generate_JUMP(cctx, JUMP_IF_FALSE, 0) == FAIL)
return NULL;
}
if (cctx->ctx_skip != SKIP_YES && generate_instr(cctx, ISN_CATCH) == NULL)
return NULL;
if (new_scope(cctx, BLOCK_SCOPE) == NULL)
return NULL;
return p;
}
static char_u *
compile_finally(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
garray_T *instr = &cctx->ctx_instr;
isn_T *isn;
int this_instr;
if (misplaced_cmdmod(cctx))
return NULL;
// end block scope from :try or :catch
if (scope != NULL && scope->se_type == BLOCK_SCOPE)
compile_endblock(cctx);
scope = cctx->ctx_scope;
// Error if not in a :try scope
if (scope == NULL || scope->se_type != TRY_SCOPE)
{
emsg(_(e_finally));
return NULL;
}
// End :catch or :finally scope: set value in ISN_TRY instruction
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label;
if (isn->isn_arg.try.try_ref->try_finally != 0)
{
emsg(_(e_finally_dup));
return NULL;
}
this_instr = instr->ga_len;
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE
&& ((isn_T *)instr->ga_data)[this_instr - 1]
.isn_type == ISN_PROF_START)
{
// jump to the profile start of the "finally"
--this_instr;
// jump to the profile end above it
if (this_instr > 0 && ((isn_T *)instr->ga_data)[this_instr - 1]
.isn_type == ISN_PROF_END)
--this_instr;
}
#endif
// Fill in the "end" label in jumps at the end of the blocks.
compile_fill_jump_to_end(&scope->se_u.se_try.ts_end_label,
this_instr, cctx);
// If there is no :catch then an exception jumps to :finally.
if (isn->isn_arg.try.try_ref->try_catch == 0)
isn->isn_arg.try.try_ref->try_catch = this_instr;
isn->isn_arg.try.try_ref->try_finally = this_instr;
if (scope->se_u.se_try.ts_catch_label != 0)
{
// Previous catch without match jumps here
isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_catch_label;
isn->isn_arg.jump.jump_where = this_instr;
scope->se_u.se_try.ts_catch_label = 0;
}
if (generate_instr(cctx, ISN_FINALLY) == NULL)
return NULL;
// TODO: set index in ts_finally_label jumps
return arg;
}
static char_u *
compile_endtry(char_u *arg, cctx_T *cctx)
{
scope_T *scope = cctx->ctx_scope;
garray_T *instr = &cctx->ctx_instr;
isn_T *try_isn;
if (misplaced_cmdmod(cctx))
return NULL;
// end block scope from :catch or :finally
if (scope != NULL && scope->se_type == BLOCK_SCOPE)
compile_endblock(cctx);
scope = cctx->ctx_scope;
// Error if not in a :try scope
if (scope == NULL || scope->se_type != TRY_SCOPE)
{
if (scope == NULL)
emsg(_(e_no_endtry));
else if (scope->se_type == WHILE_SCOPE)
emsg(_(e_endwhile));
else if (scope->se_type == FOR_SCOPE)
emsg(_(e_endfor));
else
emsg(_(e_endif));
return NULL;
}
try_isn = ((isn_T *)instr->ga_data) + scope->se_u.se_try.ts_try_label;
if (cctx->ctx_skip != SKIP_YES)
{
if (try_isn->isn_arg.try.try_ref->try_catch == 0
&& try_isn->isn_arg.try.try_ref->try_finally == 0)
{
emsg(_(e_missing_catch_or_finally));
return NULL;
}
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE
&& ((isn_T *)instr->ga_data)[instr->ga_len - 1]
.isn_type == ISN_PROF_START)
// move the profile start after "endtry" so that it's not counted when
// the exception is rethrown.
--instr->ga_len;
#endif
// Fill in the "end" label in jumps at the end of the blocks, if not
// done by ":finally".
compile_fill_jump_to_end(&scope->se_u.se_try.ts_end_label,
instr->ga_len, cctx);
if (scope->se_u.se_try.ts_catch_label != 0)
{
// Last catch without match jumps here
isn_T *isn = ((isn_T *)instr->ga_data)
+ scope->se_u.se_try.ts_catch_label;
isn->isn_arg.jump.jump_where = instr->ga_len;
}
}
compile_endblock(cctx);
if (cctx->ctx_skip != SKIP_YES)
{
// End :catch or :finally scope: set instruction index in ISN_TRY
// instruction
try_isn->isn_arg.try.try_ref->try_endtry = instr->ga_len;
if (cctx->ctx_skip != SKIP_YES
&& generate_instr(cctx, ISN_ENDTRY) == NULL)
return NULL;
#ifdef FEAT_PROFILE
if (cctx->ctx_compile_type == CT_PROFILE)
generate_instr(cctx, ISN_PROF_START);
#endif
}
return arg;
}
/*
* compile "throw {expr}"
*/
static char_u *
compile_throw(char_u *arg, cctx_T *cctx UNUSED)
{
char_u *p = skipwhite(arg);
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
if (cctx->ctx_skip == SKIP_YES)
return p;
if (may_generate_2STRING(-1, FALSE, cctx) == FAIL)
return NULL;
if (generate_instr_drop(cctx, ISN_THROW, 1) == NULL)
return NULL;
return p;
}
/*
* compile "echo expr"
* compile "echomsg expr"
* compile "echoerr expr"
* compile "execute expr"
*/
static char_u *
compile_mult_expr(char_u *arg, int cmdidx, cctx_T *cctx)
{
char_u *p = arg;
char_u *prev = arg;
char_u *expr_start;
int count = 0;
int start_ctx_lnum = cctx->ctx_lnum;
garray_T *stack = &cctx->ctx_type_stack;
type_T *type;
for (;;)
{
if (ends_excmd2(prev, p))
break;
expr_start = p;
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
if (cctx->ctx_skip != SKIP_YES)
{
// check for non-void type
type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
if (type->tt_type == VAR_VOID)
{
semsg(_(e_expression_does_not_result_in_value_str), expr_start);
return NULL;
}
}
++count;
prev = p;
p = skipwhite(p);
}
if (count > 0)
{
long save_lnum = cctx->ctx_lnum;
// Use the line number where the command started.
cctx->ctx_lnum = start_ctx_lnum;
if (cmdidx == CMD_echo || cmdidx == CMD_echon)
generate_ECHO(cctx, cmdidx == CMD_echo, count);
else if (cmdidx == CMD_execute)
generate_MULT_EXPR(cctx, ISN_EXECUTE, count);
else if (cmdidx == CMD_echomsg)
generate_MULT_EXPR(cctx, ISN_ECHOMSG, count);
else
generate_MULT_EXPR(cctx, ISN_ECHOERR, count);
cctx->ctx_lnum = save_lnum;
}
return p;
}
/*
* If "eap" has a range that is not a constant generate an ISN_RANGE
* instruction to compute it and return OK.
* Otherwise return FAIL, the caller must deal with any range.
*/
static int
compile_variable_range(exarg_T *eap, cctx_T *cctx)
{
char_u *range_end = skip_range(eap->cmd, TRUE, NULL);
char_u *p = skipdigits(eap->cmd);
if (p == range_end)
return FAIL;
return generate_RANGE(cctx, vim_strnsave(eap->cmd, range_end - eap->cmd));
}
/*
* :put r
* :put ={expr}
*/
static char_u *
compile_put(char_u *arg, exarg_T *eap, cctx_T *cctx)
{
char_u *line = arg;
linenr_T lnum;
char *errormsg;
int above = eap->forceit;
eap->regname = *line;
if (eap->regname == '=')
{
char_u *p = line + 1;
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
line = p;
}
else if (eap->regname != NUL)
++line;
if (compile_variable_range(eap, cctx) == OK)
{
lnum = above ? LNUM_VARIABLE_RANGE_ABOVE : LNUM_VARIABLE_RANGE;
}
else
{
// Either no range or a number.
// "errormsg" will not be set because the range is ADDR_LINES.
if (parse_cmd_address(eap, &errormsg, FALSE) == FAIL)
// cannot happen
return NULL;
if (eap->addr_count == 0)
lnum = -1;
else
lnum = eap->line2;
if (above)
--lnum;
}
generate_PUT(cctx, eap->regname, lnum);
return line;
}
/*
* A command that is not compiled, execute with legacy code.
*/
static char_u *
compile_exec(char_u *line, exarg_T *eap, cctx_T *cctx)
{
char_u *p;
int has_expr = FALSE;
char_u *nextcmd = (char_u *)"";
if (cctx->ctx_skip == SKIP_YES)
goto theend;
// If there was a prececing command modifier, drop it and include it in the
// EXEC command.
if (cctx->ctx_has_cmdmod)
{
garray_T *instr = &cctx->ctx_instr;
isn_T *isn = ((isn_T *)instr->ga_data) + instr->ga_len - 1;
if (isn->isn_type == ISN_CMDMOD)
{
vim_regfree(isn->isn_arg.cmdmod.cf_cmdmod
->cmod_filter_regmatch.regprog);
vim_free(isn->isn_arg.cmdmod.cf_cmdmod);
--instr->ga_len;
cctx->ctx_has_cmdmod = FALSE;
}
}
if (eap->cmdidx >= 0 && eap->cmdidx < CMD_SIZE)
{
long argt = eap->argt;
int usefilter = FALSE;
has_expr = argt & (EX_XFILE | EX_EXPAND);
// If the command can be followed by a bar, find the bar and truncate
// it, so that the following command can be compiled.
// The '|' is overwritten with a NUL, it is put back below.
if ((eap->cmdidx == CMD_write || eap->cmdidx == CMD_read)
&& *eap->arg == '!')
// :w !filter or :r !filter or :r! filter
usefilter = TRUE;
if ((argt & EX_TRLBAR) && !usefilter)
{
eap->argt = argt;
separate_nextcmd(eap);
if (eap->nextcmd != NULL)
nextcmd = eap->nextcmd;
}
else if (eap->cmdidx == CMD_wincmd)
{
p = eap->arg;
if (*p != NUL)
++p;
if (*p == 'g' || *p == Ctrl_G)
++p;
p = skipwhite(p);
if (*p == '|')
{
*p = NUL;
nextcmd = p + 1;
}
}
}
if (eap->cmdidx == CMD_syntax && STRNCMP(eap->arg, "include ", 8) == 0)
{
// expand filename in "syntax include [@group] filename"
has_expr = TRUE;
eap->arg = skipwhite(eap->arg + 7);
if (*eap->arg == '@')
eap->arg = skiptowhite(eap->arg);
}
if ((eap->cmdidx == CMD_global || eap->cmdidx == CMD_vglobal)
&& STRLEN(eap->arg) > 4)
{
int delim = *eap->arg;
p = skip_regexp_ex(eap->arg + 1, delim, TRUE, NULL, NULL, NULL);
if (*p == delim)
{
eap->arg = p + 1;
has_expr = TRUE;
}
}
if (eap->cmdidx == CMD_folddoopen || eap->cmdidx == CMD_folddoclosed)
{
// TODO: should only expand when appropriate for the command
eap->arg = skiptowhite(eap->arg);
has_expr = TRUE;
}
if (has_expr && (p = (char_u *)strstr((char *)eap->arg, "`=")) != NULL)
{
int count = 0;
char_u *start = skipwhite(line);
// :cmd xxx`=expr1`yyy`=expr2`zzz
// PUSHS ":cmd xxx"
// eval expr1
// PUSHS "yyy"
// eval expr2
// PUSHS "zzz"
// EXECCONCAT 5
for (;;)
{
if (p > start)
{
generate_PUSHS(cctx, vim_strnsave(start, p - start));
++count;
}
p += 2;
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
may_generate_2STRING(-1, TRUE, cctx);
++count;
p = skipwhite(p);
if (*p != '`')
{
emsg(_(e_missing_backtick));
return NULL;
}
start = p + 1;
p = (char_u *)strstr((char *)start, "`=");
if (p == NULL)
{
if (*skipwhite(start) != NUL)
{
generate_PUSHS(cctx, vim_strsave(start));
++count;
}
break;
}
}
generate_EXECCONCAT(cctx, count);
}
else
generate_EXEC(cctx, line);
theend:
if (*nextcmd != NUL)
{
// the parser expects a pointer to the bar, put it back
--nextcmd;
*nextcmd = '|';
}
return nextcmd;
}
/*
* A script command with heredoc, e.g.
* ruby << EOF
* command
* EOF
* Has been turned into one long line with NL characters by
* get_function_body():
* ruby << EOF<NL> command<NL>EOF
*/
static char_u *
compile_script(char_u *line, cctx_T *cctx)
{
if (cctx->ctx_skip != SKIP_YES)
{
isn_T *isn;
if ((isn = generate_instr(cctx, ISN_EXEC_SPLIT)) == NULL)
return NULL;
isn->isn_arg.string = vim_strsave(line);
}
return (char_u *)"";
}
/*
* :s/pat/repl/
*/
static char_u *
compile_substitute(char_u *arg, exarg_T *eap, cctx_T *cctx)
{
char_u *cmd = eap->arg;
char_u *expr = (char_u *)strstr((char *)cmd, "\\=");
if (expr != NULL)
{
int delimiter = *cmd++;
// There is a \=expr, find it in the substitute part.
cmd = skip_regexp_ex(cmd, delimiter, magic_isset(), NULL, NULL, NULL);
if (cmd[0] == delimiter && cmd[1] == '\\' && cmd[2] == '=')
{
garray_T save_ga = cctx->ctx_instr;
char_u *end;
int expr_res;
int trailing_error;
int instr_count;
isn_T *instr;
isn_T *isn;
cmd += 3;
end = skip_substitute(cmd, delimiter);
// Temporarily reset the list of instructions so that the jump
// labels are correct.
cctx->ctx_instr.ga_len = 0;
cctx->ctx_instr.ga_maxlen = 0;
cctx->ctx_instr.ga_data = NULL;
expr_res = compile_expr0(&cmd, cctx);
if (end[-1] == NUL)
end[-1] = delimiter;
cmd = skipwhite(cmd);
trailing_error = *cmd != delimiter && *cmd != NUL;
if (expr_res == FAIL || trailing_error
|| ga_grow(&cctx->ctx_instr, 1) == FAIL)
{
if (trailing_error)
semsg(_(e_trailing_arg), cmd);
clear_instr_ga(&cctx->ctx_instr);
cctx->ctx_instr = save_ga;
return NULL;
}
// Move the generated instructions into the ISN_SUBSTITUTE
// instructions, then restore the list of instructions before
// adding the ISN_SUBSTITUTE instruction.
instr_count = cctx->ctx_instr.ga_len;
instr = cctx->ctx_instr.ga_data;
instr[instr_count].isn_type = ISN_FINISH;
cctx->ctx_instr = save_ga;
if ((isn = generate_instr(cctx, ISN_SUBSTITUTE)) == NULL)
{
int idx;
for (idx = 0; idx < instr_count; ++idx)
delete_instr(instr + idx);
vim_free(instr);
return NULL;
}
isn->isn_arg.subs.subs_cmd = vim_strsave(arg);
isn->isn_arg.subs.subs_instr = instr;
// skip over flags
if (*end == '&')
++end;
while (ASCII_ISALPHA(*end) || *end == '#')
++end;
return end;
}
}
return compile_exec(arg, eap, cctx);
}
static char_u *
compile_redir(char_u *line, exarg_T *eap, cctx_T *cctx)
{
char_u *arg = eap->arg;
lhs_T *lhs = &cctx->ctx_redir_lhs;
if (lhs->lhs_name != NULL)
{
if (STRNCMP(arg, "END", 3) == 0)
{
if (lhs->lhs_append)
{
// First load the current variable value.
if (compile_load_lhs_with_index(lhs, lhs->lhs_whole,
cctx) == FAIL)
return NULL;
}
// Gets the redirected text and put it on the stack, then store it
// in the variable.
generate_instr_type(cctx, ISN_REDIREND, &t_string);
if (lhs->lhs_append)
generate_instr_drop(cctx, ISN_CONCAT, 1);
if (lhs->lhs_has_index)
{
// Use the info in "lhs" to store the value at the index in the
// list or dict.
if (compile_assign_unlet(lhs->lhs_whole, lhs, TRUE,
&t_string, cctx) == FAIL)
return NULL;
}
else if (generate_store_lhs(cctx, lhs, -1) == FAIL)
return NULL;
VIM_CLEAR(lhs->lhs_name);
VIM_CLEAR(lhs->lhs_whole);
return arg + 3;
}
emsg(_(e_cannot_nest_redir));
return NULL;
}
if (arg[0] == '=' && arg[1] == '>')
{
int append = FALSE;
// redirect to a variable is compiled
arg += 2;
if (*arg == '>')
{
++arg;
append = TRUE;
}
arg = skipwhite(arg);
if (compile_assign_lhs(arg, lhs, CMD_redir,
FALSE, FALSE, 1, cctx) == FAIL)
return NULL;
generate_instr(cctx, ISN_REDIRSTART);
lhs->lhs_append = append;
if (lhs->lhs_has_index)
{
lhs->lhs_whole = vim_strnsave(arg, lhs->lhs_varlen_total);
if (lhs->lhs_whole == NULL)
return NULL;
}
return arg + lhs->lhs_varlen_total;
}
// other redirects are handled like at script level
return compile_exec(line, eap, cctx);
}
#ifdef FEAT_QUICKFIX
static char_u *
compile_cexpr(char_u *line, exarg_T *eap, cctx_T *cctx)
{
isn_T *isn;
char_u *p;
isn = generate_instr(cctx, ISN_CEXPR_AUCMD);
if (isn == NULL)
return NULL;
isn->isn_arg.number = eap->cmdidx;
p = eap->arg;
if (compile_expr0(&p, cctx) == FAIL)
return NULL;
isn = generate_instr(cctx, ISN_CEXPR_CORE);
if (isn == NULL)
return NULL;
isn->isn_arg.cexpr.cexpr_ref = ALLOC_ONE(cexprref_T);
if (isn->isn_arg.cexpr.cexpr_ref == NULL)
return NULL;
isn->isn_arg.cexpr.cexpr_ref->cer_cmdidx = eap->cmdidx;
isn->isn_arg.cexpr.cexpr_ref->cer_forceit = eap->forceit;
isn->isn_arg.cexpr.cexpr_ref->cer_cmdline = vim_strsave(skipwhite(line));
return p;
}
#endif
/*
* Add a function to the list of :def functions.
* This sets "ufunc->uf_dfunc_idx" but the function isn't compiled yet.
*/
static int
add_def_function(ufunc_T *ufunc)
{
dfunc_T *dfunc;
if (def_functions.ga_len == 0)
{
// The first position is not used, so that a zero uf_dfunc_idx means it
// wasn't set.
if (ga_grow(&def_functions, 1) == FAIL)
return FAIL;
++def_functions.ga_len;
}
// Add the function to "def_functions".
if (ga_grow(&def_functions, 1) == FAIL)
return FAIL;
dfunc = ((dfunc_T *)def_functions.ga_data) + def_functions.ga_len;
CLEAR_POINTER(dfunc);
dfunc->df_idx = def_functions.ga_len;
ufunc->uf_dfunc_idx = dfunc->df_idx;
dfunc->df_ufunc = ufunc;
dfunc->df_name = vim_strsave(ufunc->uf_name);
ga_init2(&dfunc->df_var_names, sizeof(char_u *), 10);
++dfunc->df_refcount;
++def_functions.ga_len;
return OK;
}
/*
* After ex_function() has collected all the function lines: parse and compile
* the lines into instructions.
* Adds the function to "def_functions".
* When "check_return_type" is set then set ufunc->uf_ret_type to the type of
* the return statement (used for lambda). When uf_ret_type is already set
* then check that it matches.
* When "profiling" is true add ISN_PROF_START instructions.
* "outer_cctx" is set for a nested function.
* This can be used recursively through compile_lambda(), which may reallocate
* "def_functions".
* Returns OK or FAIL.
*/
int
compile_def_function(
ufunc_T *ufunc,
int check_return_type,
compiletype_T compile_type,
cctx_T *outer_cctx)
{
char_u *line = NULL;
char_u *line_to_free = NULL;
char_u *p;
char *errormsg = NULL; // error message
cctx_T cctx;
garray_T *instr;
int did_emsg_before = did_emsg;
int did_emsg_silent_before = did_emsg_silent;
int ret = FAIL;
sctx_T save_current_sctx = current_sctx;
int save_estack_compiling = estack_compiling;
int save_cmod_flags = cmdmod.cmod_flags;
int do_estack_push;
int new_def_function = FALSE;
#ifdef FEAT_PROFILE
int prof_lnum = -1;
#endif
int debug_lnum = -1;
// When using a function that was compiled before: Free old instructions.
// The index is reused. Otherwise add a new entry in "def_functions".
if (ufunc->uf_dfunc_idx > 0)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
isn_T *instr_dest = NULL;
switch (compile_type)
{
case CT_PROFILE:
#ifdef FEAT_PROFILE
instr_dest = dfunc->df_instr_prof; break;
#endif
case CT_NONE: instr_dest = dfunc->df_instr; break;
case CT_DEBUG: instr_dest = dfunc->df_instr_debug; break;
}
if (instr_dest != NULL)
// Was compiled in this mode before: Free old instructions.
delete_def_function_contents(dfunc, FALSE);
ga_clear_strings(&dfunc->df_var_names);
}
else
{
if (add_def_function(ufunc) == FAIL)
return FAIL;
new_def_function = TRUE;
}
ufunc->uf_def_status = UF_COMPILING;
CLEAR_FIELD(cctx);
cctx.ctx_compile_type = compile_type;
cctx.ctx_ufunc = ufunc;
cctx.ctx_lnum = -1;
cctx.ctx_outer = outer_cctx;
ga_init2(&cctx.ctx_locals, sizeof(lvar_T), 10);
ga_init2(&cctx.ctx_type_stack, sizeof(type_T *), 50);
ga_init2(&cctx.ctx_imports, sizeof(imported_T), 10);
cctx.ctx_type_list = &ufunc->uf_type_list;
ga_init2(&cctx.ctx_instr, sizeof(isn_T), 50);
instr = &cctx.ctx_instr;
// Set the context to the function, it may be compiled when called from
// another script. Set the script version to the most modern one.
// The line number will be set in next_line_from_context().
current_sctx = ufunc->uf_script_ctx;
current_sctx.sc_version = SCRIPT_VERSION_VIM9;
// Don't use the flag from ":legacy" here.
cmdmod.cmod_flags &= ~CMOD_LEGACY;
// Make sure error messages are OK.
do_estack_push = !estack_top_is_ufunc(ufunc, 1);
if (do_estack_push)
estack_push_ufunc(ufunc, 1);
estack_compiling = TRUE;
if (ufunc->uf_def_args.ga_len > 0)
{
int count = ufunc->uf_def_args.ga_len;
int first_def_arg = ufunc->uf_args.ga_len - count;
int i;
char_u *arg;
int off = STACK_FRAME_SIZE + (ufunc->uf_va_name != NULL ? 1 : 0);
int did_set_arg_type = FALSE;
// Produce instructions for the default values of optional arguments.
SOURCING_LNUM = 0; // line number unknown
for (i = 0; i < count; ++i)
{
garray_T *stack = &cctx.ctx_type_stack;
type_T *val_type;
int arg_idx = first_def_arg + i;
where_T where;
int r;
int jump_instr_idx = instr->ga_len;
isn_T *isn;
// Use a JUMP_IF_ARG_SET instruction to skip if the value was given.
if (generate_JUMP_IF_ARG_SET(&cctx, i - count - off) == FAIL)
goto erret;
// Make sure later arguments are not found.
ufunc->uf_args_visible = arg_idx;
arg = ((char_u **)(ufunc->uf_def_args.ga_data))[i];
r = compile_expr0(&arg, &cctx);
if (r == FAIL)
goto erret;
// If no type specified use the type of the default value.
// Otherwise check that the default value type matches the
// specified type.
val_type = ((type_T **)stack->ga_data)[stack->ga_len - 1];
where.wt_index = arg_idx + 1;
where.wt_variable = FALSE;
if (ufunc->uf_arg_types[arg_idx] == &t_unknown)
{
did_set_arg_type = TRUE;
ufunc->uf_arg_types[arg_idx] = val_type;
}
else if (check_type(ufunc->uf_arg_types[arg_idx], val_type,
TRUE, where) == FAIL)
goto erret;
if (generate_STORE(&cctx, ISN_STORE, i - count - off, NULL) == FAIL)
goto erret;
// set instruction index in JUMP_IF_ARG_SET to here
isn = ((isn_T *)instr->ga_data) + jump_instr_idx;
isn->isn_arg.jumparg.jump_where = instr->ga_len;
}
if (did_set_arg_type)
set_function_type(ufunc);
}
ufunc->uf_args_visible = ufunc->uf_args.ga_len;
/*
* Loop over all the lines of the function and generate instructions.
*/
for (;;)
{
exarg_T ea;
int starts_with_colon = FALSE;
char_u *cmd;
cmdmod_T local_cmdmod;
// Bail out on the first error to avoid a flood of errors and report
// the right line number when inside try/catch.
if (did_emsg_before != did_emsg)
goto erret;
if (line != NULL && *line == '|')
// the line continues after a '|'
++line;
else if (line != NULL && *skipwhite(line) != NUL
&& !(*line == '#' && (line == cctx.ctx_line_start
|| VIM_ISWHITE(line[-1]))))
{
semsg(_(e_trailing_arg), line);
goto erret;
}
else if (line != NULL && vim9_bad_comment(skipwhite(line)))
goto erret;
else
{
line = next_line_from_context(&cctx, FALSE);
if (cctx.ctx_lnum >= ufunc->uf_lines.ga_len)
{
// beyond the last line
#ifdef FEAT_PROFILE
if (cctx.ctx_skip != SKIP_YES)
may_generate_prof_end(&cctx, prof_lnum);
#endif
break;
}
// Make a copy, splitting off nextcmd and removing trailing spaces
// may change it.
if (line != NULL)
{
line = vim_strsave(line);
vim_free(line_to_free);
line_to_free = line;
}
}
CLEAR_FIELD(ea);
ea.cmdlinep = &line;
ea.cmd = skipwhite(line);
if (*ea.cmd == '#')
{
// "#" starts a comment
line = (char_u *)"";
continue;
}
#ifdef FEAT_PROFILE
if (cctx.ctx_compile_type == CT_PROFILE && cctx.ctx_lnum != prof_lnum
&& cctx.ctx_skip != SKIP_YES)
{
may_generate_prof_end(&cctx, prof_lnum);
prof_lnum = cctx.ctx_lnum;
generate_instr(&cctx, ISN_PROF_START);
}
#endif
if (cctx.ctx_compile_type == CT_DEBUG && cctx.ctx_lnum != debug_lnum
&& cctx.ctx_skip != SKIP_YES)
{
debug_lnum = cctx.ctx_lnum;
generate_instr_debug(&cctx);
}
cctx.ctx_prev_lnum = cctx.ctx_lnum + 1;
// Some things can be recognized by the first character.
switch (*ea.cmd)
{
case '}':
{
// "}" ends a block scope
scopetype_T stype = cctx.ctx_scope == NULL
? NO_SCOPE : cctx.ctx_scope->se_type;
if (stype == BLOCK_SCOPE)
{
compile_endblock(&cctx);
line = ea.cmd;
}
else
{
emsg(_(e_using_rcurly_outside_if_block_scope));
goto erret;
}
if (line != NULL)
line = skipwhite(ea.cmd + 1);
continue;
}
case '{':
// "{" starts a block scope
// "{'a': 1}->func() is something else
if (ends_excmd(*skipwhite(ea.cmd + 1)))
{
line = compile_block(ea.cmd, &cctx);
continue;
}
break;
}
/*
* COMMAND MODIFIERS
*/
cctx.ctx_has_cmdmod = FALSE;
if (parse_command_modifiers(&ea, &errormsg, &local_cmdmod, FALSE)
== FAIL)
{
if (errormsg != NULL)
goto erret;
// empty line or comment
line = (char_u *)"";
continue;
}
generate_cmdmods(&cctx, &local_cmdmod);
undo_cmdmod(&local_cmdmod);
// Check if there was a colon after the last command modifier or before
// the current position.
for (p = ea.cmd; p >= line; --p)
{
if (*p == ':')
starts_with_colon = TRUE;
if (p < ea.cmd && !VIM_ISWHITE(*p))
break;
}
// Skip ":call" to get to the function name, unless using :legacy
p = ea.cmd;
if (!(local_cmdmod.cmod_flags & CMOD_LEGACY))
{
if (checkforcmd(&ea.cmd, "call", 3))
{
if (*ea.cmd == '(')
// not for "call()"
ea.cmd = p;
else
ea.cmd = skipwhite(ea.cmd);
}
if (!starts_with_colon)
{
int assign;
// Check for assignment after command modifiers.
assign = may_compile_assignment(&ea, &line, &cctx);
if (assign == OK)
goto nextline;
if (assign == FAIL)
goto erret;
}
}
/*
* COMMAND after range
* 'text'->func() should not be confused with 'a mark
* "++nr" and "--nr" are eval commands
*/
cmd = ea.cmd;
if (!(local_cmdmod.cmod_flags & CMOD_LEGACY)
&& (starts_with_colon || !(*cmd == '\''
|| (cmd[0] == cmd[1] && (*cmd == '+' || *cmd == '-')))))
{
ea.cmd = skip_range(ea.cmd, TRUE, NULL);
if (ea.cmd > cmd)
{
if (!starts_with_colon)
{
semsg(_(e_colon_required_before_range_str), cmd);
goto erret;
}
ea.addr_count = 1;
if (ends_excmd2(line, ea.cmd))
{
// A range without a command: jump to the line.
// TODO: compile to a more efficient command, possibly
// calling parse_cmd_address().
ea.cmdidx = CMD_SIZE;
line = compile_exec(line, &ea, &cctx);
goto nextline;
}
}
}
p = find_ex_command(&ea, NULL, starts_with_colon
? NULL : item_exists, &cctx);
if (p == NULL)
{
if (cctx.ctx_skip != SKIP_YES)
emsg(_(e_ambiguous_use_of_user_defined_command));
goto erret;
}
// When using ":legacy cmd" always use compile_exec().
if (local_cmdmod.cmod_flags & CMOD_LEGACY)
{
char_u *start = ea.cmd;
switch (ea.cmdidx)
{
case CMD_if:
case CMD_elseif:
case CMD_else:
case CMD_endif:
case CMD_for:
case CMD_endfor:
case CMD_continue:
case CMD_break:
case CMD_while:
case CMD_endwhile:
case CMD_try:
case CMD_catch:
case CMD_finally:
case CMD_endtry:
semsg(_(e_cannot_use_legacy_with_command_str), ea.cmd);
goto erret;
default: break;
}
// ":legacy return expr" needs to be handled differently.
if (checkforcmd(&start, "return", 4))
ea.cmdidx = CMD_return;
else
ea.cmdidx = CMD_legacy;
}
if (p == ea.cmd && ea.cmdidx != CMD_SIZE)
{
if (cctx.ctx_skip == SKIP_YES)
{
line += STRLEN(line);
goto nextline;
}
// Expression or function call.
if (ea.cmdidx != CMD_eval)
{
// CMD_var cannot happen, compile_assignment() above would be
// used. Most likely an assignment to a non-existing variable.
semsg(_(e_command_not_recognized_str), ea.cmd);
goto erret;
}
}
if (cctx.ctx_had_return
&& ea.cmdidx != CMD_elseif
&& ea.cmdidx != CMD_else
&& ea.cmdidx != CMD_endif
&& ea.cmdidx != CMD_endfor
&& ea.cmdidx != CMD_endwhile
&& ea.cmdidx != CMD_catch
&& ea.cmdidx != CMD_finally
&& ea.cmdidx != CMD_endtry)
{
emsg(_(e_unreachable_code_after_return));
goto erret;
}
p = skipwhite(p);
if (ea.cmdidx != CMD_SIZE
&& ea.cmdidx != CMD_write && ea.cmdidx != CMD_read)
{
if (ea.cmdidx >= 0)
ea.argt = excmd_get_argt(ea.cmdidx);
if ((ea.argt & EX_BANG) && *p == '!')
{
ea.forceit = TRUE;
p = skipwhite(p + 1);
}
}
switch (ea.cmdidx)
{
case CMD_def:
ea.arg = p;
line = compile_nested_function(&ea, &cctx);
break;
case CMD_function:
// TODO: should we allow this, e.g. to declare a global
// function?
emsg(_(e_cannot_use_function_inside_def));
goto erret;
case CMD_return:
line = compile_return(p, check_return_type,
local_cmdmod.cmod_flags & CMOD_LEGACY, &cctx);
cctx.ctx_had_return = TRUE;
break;
case CMD_let:
emsg(_(e_cannot_use_let_in_vim9_script));
break;
case CMD_var:
case CMD_final:
case CMD_const:
case CMD_increment:
case CMD_decrement:
line = compile_assignment(p, &ea, ea.cmdidx, &cctx);
if (line == p)
line = NULL;
break;
case CMD_unlet:
case CMD_unlockvar:
case CMD_lockvar:
line = compile_unletlock(p, &ea, &cctx);
break;
case CMD_import:
line = compile_import(p, &cctx);
break;
case CMD_if:
line = compile_if(p, &cctx);
break;
case CMD_elseif:
line = compile_elseif(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_else:
line = compile_else(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_endif:
line = compile_endif(p, &cctx);
break;
case CMD_while:
line = compile_while(p, &cctx);
break;
case CMD_endwhile:
line = compile_endwhile(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_for:
line = compile_for(p, &cctx);
break;
case CMD_endfor:
line = compile_endfor(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_continue:
line = compile_continue(p, &cctx);
break;
case CMD_break:
line = compile_break(p, &cctx);
break;
case CMD_try:
line = compile_try(p, &cctx);
break;
case CMD_catch:
line = compile_catch(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_finally:
line = compile_finally(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_endtry:
line = compile_endtry(p, &cctx);
cctx.ctx_had_return = FALSE;
break;
case CMD_throw:
line = compile_throw(p, &cctx);
break;
case CMD_eval:
if (compile_expr0(&p, &cctx) == FAIL)
goto erret;
// drop the result
generate_instr_drop(&cctx, ISN_DROP, 1);
line = skipwhite(p);
break;
case CMD_echo:
case CMD_echon:
case CMD_execute:
case CMD_echomsg:
case CMD_echoerr:
line = compile_mult_expr(p, ea.cmdidx, &cctx);
break;
case CMD_put:
ea.cmd = cmd;
line = compile_put(p, &ea, &cctx);
break;
case CMD_substitute:
if (cctx.ctx_skip == SKIP_YES)
line = (char_u *)"";
else
{
ea.arg = p;
line = compile_substitute(line, &ea, &cctx);
}
break;
case CMD_redir:
ea.arg = p;
line = compile_redir(line, &ea, &cctx);
break;
case CMD_cexpr:
case CMD_lexpr:
case CMD_caddexpr:
case CMD_laddexpr:
case CMD_cgetexpr:
case CMD_lgetexpr:
#ifdef FEAT_QUICKFIX
ea.arg = p;
line = compile_cexpr(line, &ea, &cctx);
#else
ex_ni(&ea);
line = NULL;
#endif
break;
// TODO: any other commands with an expression argument?
case CMD_append:
case CMD_change:
case CMD_insert:
case CMD_k:
case CMD_t:
case CMD_xit:
not_in_vim9(&ea);
goto erret;
case CMD_SIZE:
if (cctx.ctx_skip != SKIP_YES)
{
semsg(_(e_invalid_command_str), ea.cmd);
goto erret;
}
// We don't check for a next command here.
line = (char_u *)"";
break;
case CMD_lua:
case CMD_mzscheme:
case CMD_perl:
case CMD_py3:
case CMD_python3:
case CMD_python:
case CMD_pythonx:
case CMD_ruby:
case CMD_tcl:
ea.arg = p;
if (vim_strchr(line, '\n') == NULL)
line = compile_exec(line, &ea, &cctx);
else
// heredoc lines have been concatenated with NL
// characters in get_function_body()
line = compile_script(line, &cctx);
break;
default:
// Not recognized, execute with do_cmdline_cmd().
ea.arg = p;
line = compile_exec(line, &ea, &cctx);
break;
}
nextline:
if (line == NULL)
goto erret;
line = skipwhite(line);
// Undo any command modifiers.
generate_undo_cmdmods(&cctx);
if (cctx.ctx_type_stack.ga_len < 0)
{
iemsg("Type stack underflow");
goto erret;
}
}
if (cctx.ctx_scope != NULL)
{
if (cctx.ctx_scope->se_type == IF_SCOPE)
emsg(_(e_endif));
else if (cctx.ctx_scope->se_type == WHILE_SCOPE)
emsg(_(e_endwhile));
else if (cctx.ctx_scope->se_type == FOR_SCOPE)
emsg(_(e_endfor));
else
emsg(_(e_missing_rcurly));
goto erret;
}
if (!cctx.ctx_had_return)
{
if (ufunc->uf_ret_type->tt_type == VAR_UNKNOWN)
ufunc->uf_ret_type = &t_void;
else if (ufunc->uf_ret_type->tt_type != VAR_VOID)
{
emsg(_(e_missing_return_statement));
goto erret;
}
// Return void if there is no return at the end.
generate_instr(&cctx, ISN_RETURN_VOID);
}
// When compiled with ":silent!" and there was an error don't consider the
// function compiled.
if (emsg_silent == 0 || did_emsg_silent == did_emsg_silent_before)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
dfunc->df_deleted = FALSE;
dfunc->df_script_seq = current_sctx.sc_seq;
#ifdef FEAT_PROFILE
if (cctx.ctx_compile_type == CT_PROFILE)
{
dfunc->df_instr_prof = instr->ga_data;
dfunc->df_instr_prof_count = instr->ga_len;
}
else
#endif
if (cctx.ctx_compile_type == CT_DEBUG)
{
dfunc->df_instr_debug = instr->ga_data;
dfunc->df_instr_debug_count = instr->ga_len;
}
else
{
dfunc->df_instr = instr->ga_data;
dfunc->df_instr_count = instr->ga_len;
}
dfunc->df_varcount = dfunc->df_var_names.ga_len;
dfunc->df_has_closure = cctx.ctx_has_closure;
if (cctx.ctx_outer_used)
ufunc->uf_flags |= FC_CLOSURE;
ufunc->uf_def_status = UF_COMPILED;
}
ret = OK;
erret:
if (ufunc->uf_def_status == UF_COMPILING)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
// Compiling aborted, free the generated instructions.
clear_instr_ga(instr);
VIM_CLEAR(dfunc->df_name);
ga_clear_strings(&dfunc->df_var_names);
// If using the last entry in the table and it was added above, we
// might as well remove it.
if (!dfunc->df_deleted && new_def_function
&& ufunc->uf_dfunc_idx == def_functions.ga_len - 1)
{
--def_functions.ga_len;
ufunc->uf_dfunc_idx = 0;
}
ufunc->uf_def_status = UF_COMPILE_ERROR;
while (cctx.ctx_scope != NULL)
drop_scope(&cctx);
if (errormsg != NULL)
emsg(errormsg);
else if (did_emsg == did_emsg_before)
emsg(_(e_compiling_def_function_failed));
}
if (cctx.ctx_redir_lhs.lhs_name != NULL)
{
if (ret == OK)
{
emsg(_(e_missing_redir_end));
ret = FAIL;
}
vim_free(cctx.ctx_redir_lhs.lhs_name);
vim_free(cctx.ctx_redir_lhs.lhs_whole);
}
current_sctx = save_current_sctx;
estack_compiling = save_estack_compiling;
cmdmod.cmod_flags = save_cmod_flags;
if (do_estack_push)
estack_pop();
vim_free(line_to_free);
free_imported(&cctx);
free_locals(&cctx);
ga_clear(&cctx.ctx_type_stack);
return ret;
}
void
set_function_type(ufunc_T *ufunc)
{
int varargs = ufunc->uf_va_name != NULL;
int argcount = ufunc->uf_args.ga_len;
// Create a type for the function, with the return type and any
// argument types.
// A vararg is included in uf_args.ga_len but not in uf_arg_types.
// The type is included in "tt_args".
if (argcount > 0 || varargs)
{
if (ufunc->uf_type_list.ga_itemsize == 0)
ga_init2(&ufunc->uf_type_list, sizeof(type_T *), 10);
ufunc->uf_func_type = alloc_func_type(ufunc->uf_ret_type,
argcount, &ufunc->uf_type_list);
// Add argument types to the function type.
if (func_type_add_arg_types(ufunc->uf_func_type,
argcount + varargs,
&ufunc->uf_type_list) == FAIL)
return;
ufunc->uf_func_type->tt_argcount = argcount + varargs;
ufunc->uf_func_type->tt_min_argcount =
argcount - ufunc->uf_def_args.ga_len;
if (ufunc->uf_arg_types == NULL)
{
int i;
// lambda does not have argument types.
for (i = 0; i < argcount; ++i)
ufunc->uf_func_type->tt_args[i] = &t_any;
}
else
mch_memmove(ufunc->uf_func_type->tt_args,
ufunc->uf_arg_types, sizeof(type_T *) * argcount);
if (varargs)
{
ufunc->uf_func_type->tt_args[argcount] =
ufunc->uf_va_type == NULL ? &t_list_any : ufunc->uf_va_type;
ufunc->uf_func_type->tt_flags = TTFLAG_VARARGS;
}
}
else
// No arguments, can use a predefined type.
ufunc->uf_func_type = get_func_type(ufunc->uf_ret_type,
argcount, &ufunc->uf_type_list);
}
/*
* Delete an instruction, free what it contains.
*/
void
delete_instr(isn_T *isn)
{
switch (isn->isn_type)
{
case ISN_DEF:
case ISN_EXEC:
case ISN_EXEC_SPLIT:
case ISN_LEGACY_EVAL:
case ISN_LOADAUTO:
case ISN_LOADB:
case ISN_LOADENV:
case ISN_LOADG:
case ISN_LOADOPT:
case ISN_LOADT:
case ISN_LOADW:
case ISN_PUSHEXC:
case ISN_PUSHFUNC:
case ISN_PUSHS:
case ISN_RANGE:
case ISN_STOREAUTO:
case ISN_STOREB:
case ISN_STOREENV:
case ISN_STOREG:
case ISN_STORET:
case ISN_STOREW:
case ISN_STRINGMEMBER:
vim_free(isn->isn_arg.string);
break;
case ISN_SUBSTITUTE:
{
int idx;
isn_T *list = isn->isn_arg.subs.subs_instr;
vim_free(isn->isn_arg.subs.subs_cmd);
for (idx = 0; list[idx].isn_type != ISN_FINISH; ++idx)
delete_instr(list + idx);
vim_free(list);
}
break;
case ISN_INSTR:
{
int idx;
isn_T *list = isn->isn_arg.instr;
for (idx = 0; list[idx].isn_type != ISN_FINISH; ++idx)
delete_instr(list + idx);
vim_free(list);
}
break;
case ISN_LOADS:
case ISN_STORES:
vim_free(isn->isn_arg.loadstore.ls_name);
break;
case ISN_UNLET:
case ISN_UNLETENV:
vim_free(isn->isn_arg.unlet.ul_name);
break;
case ISN_STOREOPT:
vim_free(isn->isn_arg.storeopt.so_name);
break;
case ISN_PUSHBLOB: // push blob isn_arg.blob
blob_unref(isn->isn_arg.blob);
break;
case ISN_PUSHJOB:
#ifdef FEAT_JOB_CHANNEL
job_unref(isn->isn_arg.job);
#endif
break;
case ISN_PUSHCHANNEL:
#ifdef FEAT_JOB_CHANNEL
channel_unref(isn->isn_arg.channel);
#endif
break;
case ISN_UCALL:
vim_free(isn->isn_arg.ufunc.cuf_name);
break;
case ISN_FUNCREF:
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ isn->isn_arg.funcref.fr_func;
ufunc_T *ufunc = dfunc->df_ufunc;
if (ufunc != NULL && func_name_refcount(ufunc->uf_name))
func_ptr_unref(ufunc);
}
break;
case ISN_DCALL:
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ isn->isn_arg.dfunc.cdf_idx;
if (dfunc->df_ufunc != NULL
&& func_name_refcount(dfunc->df_ufunc->uf_name))
func_ptr_unref(dfunc->df_ufunc);
}
break;
case ISN_NEWFUNC:
{
char_u *lambda = isn->isn_arg.newfunc.nf_lambda;
ufunc_T *ufunc = find_func_even_dead(lambda, TRUE, NULL);
if (ufunc != NULL)
{
unlink_def_function(ufunc);
func_ptr_unref(ufunc);
}
vim_free(lambda);
vim_free(isn->isn_arg.newfunc.nf_global);
}
break;
case ISN_CHECKTYPE:
case ISN_SETTYPE:
free_type(isn->isn_arg.type.ct_type);
break;
case ISN_CMDMOD:
vim_regfree(isn->isn_arg.cmdmod.cf_cmdmod
->cmod_filter_regmatch.regprog);
vim_free(isn->isn_arg.cmdmod.cf_cmdmod);
break;
case ISN_LOADSCRIPT:
case ISN_STORESCRIPT:
vim_free(isn->isn_arg.script.scriptref);
break;
case ISN_TRY:
vim_free(isn->isn_arg.try.try_ref);
break;
case ISN_CEXPR_CORE:
vim_free(isn->isn_arg.cexpr.cexpr_ref->cer_cmdline);
vim_free(isn->isn_arg.cexpr.cexpr_ref);
break;
case ISN_2BOOL:
case ISN_2STRING:
case ISN_2STRING_ANY:
case ISN_ADDBLOB:
case ISN_ADDLIST:
case ISN_ANYINDEX:
case ISN_ANYSLICE:
case ISN_BCALL:
case ISN_BLOBAPPEND:
case ISN_BLOBINDEX:
case ISN_BLOBSLICE:
case ISN_CATCH:
case ISN_CEXPR_AUCMD:
case ISN_CHECKLEN:
case ISN_CHECKNR:
case ISN_CMDMOD_REV:
case ISN_COMPAREANY:
case ISN_COMPAREBLOB:
case ISN_COMPAREBOOL:
case ISN_COMPAREDICT:
case ISN_COMPAREFLOAT:
case ISN_COMPAREFUNC:
case ISN_COMPARELIST:
case ISN_COMPARENR:
case ISN_COMPARESPECIAL:
case ISN_COMPARESTRING:
case ISN_CONCAT:
case ISN_COND2BOOL:
case ISN_DEBUG:
case ISN_DROP:
case ISN_ECHO:
case ISN_ECHOERR:
case ISN_ECHOMSG:
case ISN_ENDTRY:
case ISN_EXECCONCAT:
case ISN_EXECUTE:
case ISN_FINALLY:
case ISN_FINISH:
case ISN_FOR:
case ISN_GETITEM:
case ISN_JUMP:
case ISN_JUMP_IF_ARG_SET:
case ISN_LISTAPPEND:
case ISN_LISTINDEX:
case ISN_LISTSLICE:
case ISN_LOAD:
case ISN_LOADBDICT:
case ISN_LOADGDICT:
case ISN_LOADOUTER:
case ISN_LOADREG:
case ISN_LOADTDICT:
case ISN_LOADV:
case ISN_LOADWDICT:
case ISN_LOCKCONST:
case ISN_MEMBER:
case ISN_NEGATENR:
case ISN_NEWDICT:
case ISN_NEWLIST:
case ISN_OPANY:
case ISN_OPFLOAT:
case ISN_OPNR:
case ISN_PCALL:
case ISN_PCALL_END:
case ISN_PROF_END:
case ISN_PROF_START:
case ISN_PUSHBOOL:
case ISN_PUSHF:
case ISN_PUSHNR:
case ISN_PUSHSPEC:
case ISN_PUT:
case ISN_REDIREND:
case ISN_REDIRSTART:
case ISN_RETURN:
case ISN_RETURN_VOID:
case ISN_SHUFFLE:
case ISN_SLICE:
case ISN_STORE:
case ISN_STOREINDEX:
case ISN_STORENR:
case ISN_STOREOUTER:
case ISN_STORERANGE:
case ISN_STOREREG:
case ISN_STOREV:
case ISN_STRINDEX:
case ISN_STRSLICE:
case ISN_THROW:
case ISN_TRYCONT:
case ISN_UNLETINDEX:
case ISN_UNLETRANGE:
case ISN_UNPACK:
// nothing allocated
break;
}
}
/*
* Free all instructions for "dfunc" except df_name.
*/
static void
delete_def_function_contents(dfunc_T *dfunc, int mark_deleted)
{
int idx;
ga_clear(&dfunc->df_def_args_isn);
ga_clear_strings(&dfunc->df_var_names);
if (dfunc->df_instr != NULL)
{
for (idx = 0; idx < dfunc->df_instr_count; ++idx)
delete_instr(dfunc->df_instr + idx);
VIM_CLEAR(dfunc->df_instr);
dfunc->df_instr = NULL;
}
if (dfunc->df_instr_debug != NULL)
{
for (idx = 0; idx < dfunc->df_instr_debug_count; ++idx)
delete_instr(dfunc->df_instr_debug + idx);
VIM_CLEAR(dfunc->df_instr_debug);
dfunc->df_instr_debug = NULL;
}
#ifdef FEAT_PROFILE
if (dfunc->df_instr_prof != NULL)
{
for (idx = 0; idx < dfunc->df_instr_prof_count; ++idx)
delete_instr(dfunc->df_instr_prof + idx);
VIM_CLEAR(dfunc->df_instr_prof);
dfunc->df_instr_prof = NULL;
}
#endif
if (mark_deleted)
dfunc->df_deleted = TRUE;
if (dfunc->df_ufunc != NULL)
dfunc->df_ufunc->uf_def_status = UF_NOT_COMPILED;
}
/*
* When a user function is deleted, clear the contents of any associated def
* function, unless another user function still uses it.
* The position in def_functions can be re-used.
*/
void
unlink_def_function(ufunc_T *ufunc)
{
if (ufunc->uf_dfunc_idx > 0)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
if (--dfunc->df_refcount <= 0)
delete_def_function_contents(dfunc, TRUE);
ufunc->uf_def_status = UF_NOT_COMPILED;
ufunc->uf_dfunc_idx = 0;
if (dfunc->df_ufunc == ufunc)
dfunc->df_ufunc = NULL;
}
}
/*
* Used when a user function refers to an existing dfunc.
*/
void
link_def_function(ufunc_T *ufunc)
{
if (ufunc->uf_dfunc_idx > 0)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data)
+ ufunc->uf_dfunc_idx;
++dfunc->df_refcount;
}
}
#if defined(EXITFREE) || defined(PROTO)
/*
* Free all functions defined with ":def".
*/
void
free_def_functions(void)
{
int idx;
for (idx = 0; idx < def_functions.ga_len; ++idx)
{
dfunc_T *dfunc = ((dfunc_T *)def_functions.ga_data) + idx;
delete_def_function_contents(dfunc, TRUE);
vim_free(dfunc->df_name);
}
ga_clear(&def_functions);
}
#endif
#endif // FEAT_EVAL
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