[webkit-changes] [WebKit/WebKit] 1cca7e: Unreviewed clang/libstdc++ build fix in CSSCustomP...

[Žan Doberšek]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 1cca7e6637ff445f2fbd7cc19d02c53ad07dda2f
      https://github.com/WebKit/WebKit/commit/1cca7e6637ff445f2fbd7cc19d02c53ad07dda2f
  Author: Žan Doberšek <zdobersek at igalia.com>
  Date:   2022-12-12 (Mon, 12 Dec 2022)

  Changed paths:
    M Source/WebCore/css/CSSCustomPropertyValue.h

  Log Message:
  -----------
  Unreviewed clang/libstdc++ build fix in CSSCustomPropertyValue
https://bugs.webkit.org/show_bug.cgi?id=249136

Unreviewed build fix for the Clang and libstdc++ combination.

257701 at main added the RefPtr<StyleImage> type to the CSSCustomPropertyValue's
SyntaxValue variant which ended tripping up construction of the VariantValue
variant with either CSSVariableReferenceValue or CSSVariableData Refs. This
seems to be specific to the libstdc++ std::variant<> implementation when used
alongside Clang. Workaround is to avoid the simplest conversion constructor of
the variant and instead use std::in_place_type<T> to explictly state the
intended type that's to be constructed and contained in the variant object.

* Source/WebCore/css/CSSCustomPropertyValue.h:

Canonical link: https://commits.webkit.org/257727@main