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patch 9.0.2076: Vim9: No support for type aliases

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Problem:  Vim9: No support for type aliases
Solution: Implement :type command

A type definition is giving a name to a type specification.  This also known
type alias.

	:type ListOfStrings = list<string>

The type alias can be used wherever a built-in type can be used.  The type
alias name must start with an upper case character.

closes: #13407

Signed-off-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
This commit is contained in:
Yegappan Lakshmanan
2023-10-27 19:35:26 +02:00
committed by Christian Brabandt
parent 4bca4897a1
commit ec3cebbd2b
22 changed files with 710 additions and 36 deletions
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23
src/vim9compile.c
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@@ -1327,11 +1327,12 @@ assignment_len(char_u *p, int *heredoc)
/*
* Generate the load instruction for "name".
*/
static void
static int
generate_loadvar(cctx_T *cctx, lhs_T *lhs)
{
char_u *name = lhs->lhs_name;
type_T *type = lhs->lhs_type;
int res = OK;
switch (lhs->lhs_dest)
{
@@ -1360,7 +1361,7 @@ generate_loadvar(cctx_T *cctx, lhs_T *lhs)
generate_LOAD(cctx, ISN_LOADT, 0, name + 2, type);
break;
case dest_script:
compile_load_scriptvar(cctx,
res = compile_load_scriptvar(cctx,
name + (name[1] == ':' ? 2 : 0), NULL, NULL);
break;
case dest_env:
@@ -1392,6 +1393,8 @@ generate_loadvar(cctx_T *cctx, lhs_T *lhs)
// list or dict value should already be on the stack.
break;
}
return res;
}
/*
@@ -2240,10 +2243,11 @@ compile_load_lhs(
&& need_type(rhs_type, member_type, FALSE,
-3, 0, cctx, FALSE, FALSE) == FAIL)
return FAIL;
return OK;
}
else
generate_loadvar(cctx, lhs);
return OK;
return generate_loadvar(cctx, lhs);
}
/*
@@ -2301,7 +2305,8 @@ compile_load_lhs_with_index(lhs_T *lhs, char_u *var_start, cctx_T *cctx)
return generate_CLASSMEMBER(cctx, TRUE, cl, lhs->lhs_member_idx);
}
compile_load_lhs(lhs, var_start, NULL, cctx);
if (compile_load_lhs(lhs, var_start, NULL, cctx) == FAIL)
return FAIL;
if (lhs->lhs_has_index)
{
@@ -2510,6 +2515,7 @@ push_default_value(
case VAR_VOID:
case VAR_INSTR:
case VAR_CLASS:
case VAR_TYPEALIAS:
case VAR_SPECIAL: // cannot happen
// This is skipped for local variables, they are always
// initialized to zero. But in a "for" or "while" loop
@@ -3963,6 +3969,11 @@ compile_def_function(
line = (char_u *)"";
break;
case CMD_type:
emsg(_(e_type_can_only_be_used_in_script));
goto erret;
break;
case CMD_global:
if (check_global_and_subst(ea.cmd, p) == FAIL)
goto erret;