https://github.com/llvmbot created
https://github.com/llvm/llvm-project/pull/101965
Backport c65afad9c58474a784633314e945c874ed06584a
Requested by: @Sirraide
>From 68217f5d2765f7774e40526d7f9960f42d067dca Mon Sep 17 00:00:00 2001
From: Sirraide <aeternalm...@gmail.com>
Date: Mon, 5 Aug 2024 14:02:15 +0200
Subject: [PATCH] [Clang] Define __cpp_pack_indexing (#101956)
Following the discussion on #101448 this defines
`__cpp_pack_indexing`. Since pack indexing is currently
supported in all language modes, the feature test macro
is also defined in all language modes.
(cherry picked from commit c65afad9c58474a784633314e945c874ed06584a)
---
clang/docs/LanguageExtensions.rst | 1 +
clang/lib/Frontend/InitPreprocessor.cpp | 1 +
clang/test/Lexer/cxx-features.cpp | 4 ++++
3 files changed, 6 insertions(+)
diff --git a/clang/docs/LanguageExtensions.rst
b/clang/docs/LanguageExtensions.rst
index 81784c75081ba..1c4a6ecca2142 100644
--- a/clang/docs/LanguageExtensions.rst
+++ b/clang/docs/LanguageExtensions.rst
@@ -1503,6 +1503,7 @@ Conditional ``explicit``
__cpp_conditional_explicit C+
``static operator()`` __cpp_static_call_operator
C++23 C++03
Attributes on Lambda-Expressions
C++23 C++11
Attributes on Structured Bindings __cpp_structured_bindings
C++26 C++03
+Pack Indexing __cpp_pack_indexing
C++26 C++03
``= delete ("should have a reason");`` __cpp_deleted_function
C++26 C++03
-------------------------------------------- --------------------------------
------------- -------------
Designated initializers (N494)
C99 C89
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp
b/clang/lib/Frontend/InitPreprocessor.cpp
index 920ddf7e59913..3ed7243deba8a 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -763,6 +763,7 @@ static void InitializeCPlusPlusFeatureTestMacros(const
LangOptions &LangOpts,
Builder.defineMacro("__cpp_placeholder_variables", "202306L");
// C++26 features supported in earlier language modes.
+ Builder.defineMacro("__cpp_pack_indexing", "202311L");
Builder.defineMacro("__cpp_deleted_function", "202403L");
if (LangOpts.Char8)
diff --git a/clang/test/Lexer/cxx-features.cpp
b/clang/test/Lexer/cxx-features.cpp
index 4c2aa3ae2c544..08b732132228b 100644
--- a/clang/test/Lexer/cxx-features.cpp
+++ b/clang/test/Lexer/cxx-features.cpp
@@ -38,6 +38,10 @@
#error "wrong value for __cpp_deleted_function"
#endif
+#if check(pack_indexing, 202311, 202311, 202311, 202311, 202311, 202311,
202311)
+#error "wrong value for __cpp_pack_indexing"
+#endif
+
#if check(placeholder_variables, 202306, 202306, 202306, 202306, 202306,
202306, 202306)
#error "wrong value for __cpp_placeholder_variables"
#endif
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