[PATCH v2 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;
    }
`

--
  v2: widl: Add support for inherited runtime classes.

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

[PATCH v2 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..65fea494e0a 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
-						{ $$ = type_runtimeclass_define($2, $1, $4); }
+runtimeclass_def: attributes runtimeclass inherit '{' class_interfaces '}' semicolon_opt
+						{ if ($3) if (type_get_type($3) != TYPE_RUNTIMECLASS) error_loc("%s is not a runtimeclass\n", $3->name);
+						  $$ = type_runtimeclass_define($2, $1, $5); }
    ;

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

[Mohamad Al-Jaf (＠maljaf)]

On Mon Apr  3 07:12:39 2023 +0000, Rémi Bernon wrote:
> I don't see the `runtimeclass A : runtimeclass B` pattern anywhere in
> the SDK. Should it really be supported?
> If not you only need to add `inherit` there. If it is, I'd suggest to
> duplicate the `inherit` rule and name it `class_inherit` instead of
> `base`, to be more explicit.

Oh sorry, this was a mistake on my part.

[Mohamad Al-Jaf (＠maljaf)]

On Mon Apr  3 08:19:01 2023 +0000, Mohamad Al-Jaf wrote:
> changed this line in [version 2 of the diff](/wine/wine/-/merge_requests/2559/diffs?diff_id=40279&start_sha=89ba470d84231dbdbbe4c734cbe0c3c5e30c9314#492b92cda3894bf22ea547a8673a16139f4127e7_1018_1012)

The code you gave doesn't build, it results in a `Segmentation fault (core dumped)` error because the function `type_get_type` and subsequently the function it forwards to don't check if the parameter is NULL or not. I wasn't sure if modifying the helper function was the right way to go so I just added an if statement prior to checking the type.

[Rémi Bernon (＠rbernon)]

On Mon Apr  3 08:23:29 2023 +0000, Mohamad Al-Jaf wrote:
> The code you gave doesn't build, it results in a `Segmentation fault
> (core dumped)` error because the function `type_get_type` and
> subsequently the function it forwards to don't check if the parameter is
> NULL or not. I wasn't sure if modifying the helper function was the
> right way to go so I just added an if statement prior to checking the type.

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.