[PATCH v3 0/1] MR2559: widl: Add support for inherited runtime classes.

[Mohamad Al-Jaf (＠maljaf)]

Needed to build windows.ui.composition.idl.

Example code that needs this:

`
    [
        contract(Windows.Foundation.UniversalApiContract, 2.0),
        marshaling_behavior(agile),
        threading(both)
    ]
    runtimeclass ColorKeyFrameAnimation : Windows.UI.Composition.KeyFrameAnimation
    {
        [default] interface Windows.UI.Composition.IColorKeyFrameAnimation;
    }
`

--
  v3: widl: Add support for inherited runtime classes.

https://gitlab.winehq.org/wine/wine/-/merge_requests/2559

[PATCH v3 1/1] widl: Add support for inherited runtime classes.

[Mohamad Al-Jaf]

From: Mohamad Al-Jaf

Needed to build windows.ui.composition.idl.
---
 tools/widl/parser.y | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/widl/parser.y b/tools/widl/parser.y
index 5567d94559e..9c07536eac1 100644
--- a/tools/widl/parser.y
+++ b/tools/widl/parser.y
@@ -1009,8 +1009,9 @@ coclassdef: attributes coclass '{' class_interfaces '}' semicolon_opt
 runtimeclass: tRUNTIMECLASS typename		{ $$ = type_runtimeclass_declare($2, current_namespace); }
    ;

-runtimeclass_def: attributes runtimeclass '{' class_interfaces '}' semicolon_opt
-						{ $$ = type_runtimeclass_define($2, $1, $4); }
+runtimeclass_def: attributes runtimeclass inherit '{' class_interfaces '}' semicolon_opt
+						{ if ($3 && type_get_type($3) != TYPE_RUNTIMECLASS) error_loc("%s is not a runtimeclass\n", $3->name);
+						  $$ = type_runtimeclass_define($2, $1, $5); }
    ;

apicontract: tAPICONTRACT typename		{ $$ = type_apicontract_declare($2, current_namespace); }

[Mohamad Al-Jaf (＠maljaf)]

On Mon Apr  3 08:33:03 2023 +0000, Rémi Bernon wrote:
> Yeah it was just a suggestion, I didn't check it. You should use `$3 &&
> type_get_type($3) != TYPE_RUNTIMECLASS` instead of two ifs.

Yeah, I realized that after pushing and was going to add a comment. Though, I'm curious why there's no error checking in the helper functions. Wouldn't it be better to check if the parameter is NULL there?

[Rémi Bernon (＠rbernon)]

On Mon Apr  3 08:53:31 2023 +0000, Mohamad Al-Jaf wrote:
> Yeah, I realized that after pushing and was going to add a comment.
> Though, I'm curious why there's no error checking in the helper
> functions. Wouldn't it be better to check if the parameter is NULL there?

It was never needed, so you can then say that it's an error to call it with a `NULL` parameter.
I think it makes sense to make the check here, as the base class is optional.

[Mohamad Al-Jaf (＠maljaf)]

On Mon Apr  3 09:03:03 2023 +0000, Rémi Bernon wrote:
> It was never needed, so you can then say that it's an error to call it
> with a `NULL` parameter.
> I think it makes sense to make the check here, as the base class is optional.

Ah, you're right, that makes sense.

[PATCH v3 0/1] MR2559: widl: Add support for inherited runtime classes. - approved

[Rémi Bernon (＠rbernon)]

This merge request was approved by Rémi Bernon.