Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: dc904eb4098bab9698ede556c0f2cc6b9955d9ab
https://github.com/WebKit/WebKit/commit/dc904eb4098bab9698ede556c0f2cc6b9955d9ab
Author: Sam Weinig <[email protected]>
Date: 2024-12-24 (Tue, 24 Dec 2024)
Changed paths:
M Source/WTF/WTF.xcodeproj/project.pbxproj
M Source/WTF/wtf/CMakeLists.txt
A Source/WTF/wtf/CompactVariant.h
A Source/WTF/wtf/CompactVariantOperations.h
A Source/WTF/wtf/VariantExtras.h
M Source/WTF/wtf/VariantList.h
M Source/WTF/wtf/VariantListOperations.h
M Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
A Tools/TestWebKitAPI/Tests/WTF/CompactVariant.cpp
M Tools/TestWebKitAPI/Tests/WTF/LifecycleLogger.h
M Tools/TestWebKitAPI/Tests/WTF/VariantList.cpp
Log Message:
-----------
Introduce a CompactVariant for efficient variants of pointers and types
smaller than 56 bits
https://bugs.webkit.org/show_bug.cgi?id=285099
Reviewed by Darin Adler.
Adds `WTF::CompactVariant`.
A `WTF::CompactVariant` acts like a `std::variant` with the following
differences:
- All alternatives must be pointers, smart pointers, have size of 56 bits or
fewer,
or be specialized for `CompactVariantTraits`.
- It can only contain 254 or fewer alternatives.
- Has a more limited API, only offering `holds_alternative()` for type checking
and
`switchOn()` for value access.
Factors out a few share helpers from VariantList into a VariantExtras.h file.
* Source/WTF/WTF.xcodeproj/project.pbxproj:
* Source/WTF/wtf/CMakeLists.txt:
* Source/WTF/wtf/CompactVariant.h: Added.
* Source/WTF/wtf/CompactVariantOperations.h: Added.
* Source/WTF/wtf/VariantExtras.h: Added.
* Source/WTF/wtf/VariantList.h:
* Source/WTF/wtf/VariantListOperations.h:
* Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
* Tools/TestWebKitAPI/Tests/WTF/CompactVariant.cpp: Added.
* Tools/TestWebKitAPI/Tests/WTF/LifecycleLogger.h:
Canonical link: https://commits.webkit.org/288271@main
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