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| author | Paul Fee <paul.f.fee@gmail.com> | 2021-01-25 01:18:30 +0000 |
|---|---|---|
| committer | Jason Merrill <jason@redhat.com> | 2021-01-26 17:11:34 -0500 |
| commit | 78739c2df788ee5c868d998a6333d453317d8711 (patch) | |
| tree | 8b2912606a50618a4c05b01ed1712f18f2a6f1e1 /gcc/doc/cpp.texi | |
| parent | 96253f069ead0736536de803b06a8053a85039a6 (diff) | |
| download | gcc-78739c2df788ee5c868d998a6333d453317d8711.zip gcc-78739c2df788ee5c868d998a6333d453317d8711.tar.gz gcc-78739c2df788ee5c868d998a6333d453317d8711.tar.bz2 | |
c++: Add support for -std=c++23
Derived from the changes that added C++2a support in 2017.
r8-3237-g026a79f70cf33f836ea5275eda72d4870a3041e5
No C++23 features are added here.
Use of -std=c++23 sets __cplusplus to 202100L.
$ g++ -std=c++23 -dM -E -x c++ - < /dev/null | grep cplusplus
#define __cplusplus 202100L
gcc/
* doc/cpp.texi (__cplusplus): Document value for -std=c++23
or -std=gnu++23.
* doc/invoke.texi: Document -std=c++23 and -std=gnu++23.
* dwarf2out.c (highest_c_language): Recognise C++20 and C++23.
(gen_compile_unit_die): Recognise C++23.
gcc/c-family/
* c-common.h (cxx_dialect): Add cxx23 as a dialect.
* c.opt: Add options for -std=c++23, std=c++2b, -std=gnu++23
and -std=gnu++2b
* c-opts.c (set_std_cxx23): New.
(c_common_handle_option): Set options when -std=c++23 is enabled.
(c_common_post_options): Adjust comments.
(set_std_cxx20): Likewise.
gcc/testsuite/
* lib/target-supports.exp (check_effective_target_c++2a):
Check for C++2a or C++23.
(check_effective_target_c++20_down): New.
(check_effective_target_c++23_only): New.
(check_effective_target_c++23): New.
* g++.dg/cpp23/cplusplus.C: New.
libcpp/
* include/cpplib.h (c_lang): Add CXX23 and GNUCXX23.
* init.c (lang_defaults): Add rows for CXX23 and GNUCXX23.
(cpp_init_builtins): Set __cplusplus to 202100L for C++23.
Diffstat (limited to 'gcc/doc/cpp.texi')
| -rw-r--r-- | gcc/doc/cpp.texi | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index 25f2625..2c109bb 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -1907,9 +1907,10 @@ selected, the value of the macro is @code{201103L} for the 2011 C++ standard, @code{201402L} for the 2014 C++ standard, @code{201703L} for the 2017 C++ standard, -or an unspecified value strictly larger than @code{201703L} for the -experimental languages enabled by @option{-std=c++2a} and -@option{-std=gnu++2a}. +@code{202002L} for the 2020 C++ standard, +or an unspecified value strictly larger than @code{202002L} for the +experimental languages enabled by @option{-std=c++23} and +@option{-std=gnu++23}. @item __OBJC__ This macro is defined, with value 1, when the Objective-C compiler is in |