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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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8
src/vim9expr.c
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@@ -238,6 +238,7 @@ compile_member(int is_slice, int *keeping_dict, cctx_T *cctx)
case VAR_INSTR:
case VAR_CLASS:
case VAR_OBJECT:
case VAR_TYPEALIAS:
case VAR_UNKNOWN:
case VAR_ANY:
case VAR_VOID:
@@ -529,6 +530,13 @@ compile_load_scriptvar(
{
svar_T *sv = ((svar_T *)si->sn_var_vals.ga_data) + idx;
if (sv->sv_tv->v_type == VAR_TYPEALIAS)
{
semsg(_(e_using_typealias_as_variable),
sv->sv_tv->vval.v_typealias->ta_name);
return FAIL;
}
generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
current_sctx.sc_sid, idx, sv->sv_type);
return OK;