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patch 8.2.0677: Vim9: no support for closures

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Problem:    Vim9: no support for closures.
Solution:   Find variables in the outer function scope, so long as the scope
            exists.
This commit is contained in:
Bram Moolenaar
2020-05-01 19:29:08 +02:00
parent 37addecc42
commit c8cd2b34d1
8 changed files with 223 additions and 126 deletions
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17
src/structs.h
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@@ -1561,7 +1561,11 @@ typedef struct
sctx_T uf_script_ctx; // SCTX where function was defined,
// used for s: variables
int uf_refcount; // reference count, see func_name_refcount()
funccall_T *uf_scoped; // l: local variables for closure
garray_T *uf_ectx_stack; // where compiled closure finds local vars
int uf_ectx_frame; // index of function frame in uf_ectx_stack
char_u *uf_name_exp; // if "uf_name[]" starts with SNR the name with
// "<SNR>" as a string, otherwise NULL
char_u uf_name[1]; // name of function (actually longer); can
@@ -1569,6 +1573,19 @@ typedef struct
// KS_EXTRA KE_SNR)
} ufunc_T;
// flags used in uf_flags
#define FC_ABORT 0x01 // abort function on error
#define FC_RANGE 0x02 // function accepts range
#define FC_DICT 0x04 // Dict function, uses "self"
#define FC_CLOSURE 0x08 // closure, uses outer scope variables
#define FC_DELETED 0x10 // :delfunction used while uf_refcount > 0
#define FC_REMOVED 0x20 // function redefined while uf_refcount > 0
#define FC_SANDBOX 0x40 // function defined in the sandbox
#define FC_DEAD 0x80 // function kept only for reference to dfunc
#define FC_EXPORT 0x100 // "export def Func()"
#define FC_NOARGS 0x200 // no a: variables in lambda
#define FC_VIM9 0x400 // defined in vim9 script file
#define MAX_FUNC_ARGS 20 // maximum number of function arguments
#define VAR_SHORT_LEN 20 // short variable name length
#define FIXVAR_CNT 12 // number of fixed variables