KJ16609/gcc
1
0
Fork 0
mirror of https://gcc.gnu.org/git/gcc.git synced 2026-02-21 19:35:28 -05:00
Code Issues Packages Projects Releases Wiki Activity

preprocessor: Implement C++23 P2437R1 - Support for #warning [PR106646]

Browse Source 
On Thu, Aug 18, 2022 at 11:02:44PM +0000, Joseph Myers wrote:
> ISO C2x standardizes the existing #warning extension.  Arrange
> accordingly for it not to be diagnosed with -std=c2x -pedantic, but to
> be diagnosed with -Wc11-c2x-compat.

And here is the corresponding C++ version.
Don't pedwarn about this for C++23/GNU++23 and tweak the diagnostics
for C++ otherwise, + testsuite coverage.
The diagnostic wording is similar e.g. to the #elifdef diagnostics.

2022-08-24  Jakub Jelinek  <jakub@redhat.com>

	PR c++/106646
	* init.cc: Implement C++23 P2437R1 - Support for #warning.
	(lang_defaults): Set warning_directive for GNUCXX23 and CXX23.
	* directives.cc (directive_diagnostics): Use different wording of
	#warning pedwarn for C++.

	* g++.dg/cpp/warning-1.C: New test.
	* g++.dg/cpp/warning-2.C: New test.
	* g++.dg/cpp/warning-3.C: New test.
This commit is contained in:
Jakub Jelinek
2022-08-24 09:55:57 +02:00
parent 42301c02e4
commit 365202625d
5 changed files with 28 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
libcpp/init.cc
View File

@@ -123,8 +123,8 @@ static const struct lang_flags lang_defaults[] =
/* CXX17 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0 },
/* GNUCXX20 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0 },
/* CXX20 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0 },
/* GNUCXX23 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1 },
/* CXX23 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1 },
/* GNUCXX23 */ { 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1 },
/* CXX23 */ { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1 },
/* ASM */ { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};