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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/vim9execute.c
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@@ -3807,6 +3807,13 @@ exec_instructions(ectx_T *ectx)
case ISN_STORE:
--ectx->ec_stack.ga_len;
tv = STACK_TV_VAR(iptr->isn_arg.number);
if (STACK_TV_BOT(0)->v_type == VAR_TYPEALIAS)
{
semsg(_(e_using_typealias_as_variable),
STACK_TV_BOT(0)->vval.v_typealias->ta_name);
clear_tv(STACK_TV_BOT(0));
goto on_error;
}
clear_tv(tv);
*tv = *STACK_TV_BOT(0);
break;
@@ -7517,6 +7524,7 @@ tv2bool(typval_T *tv)
case VAR_INSTR:
case VAR_CLASS:
case VAR_OBJECT:
case VAR_TYPEALIAS:
break;
}
return FALSE;