c++: define __cpp_pack_indexing [PR113798]

Forgot to do this in my original patch.

	PR c++/113798

gcc/c-family/ChangeLog:

	* c-cppbuiltin.cc (c_cpp_builtins): Predefine
	__cpp_pack_indexing=202311L for C++26.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp26/feat-cxx26.C (__cpp_pack_indexing): Add test.

Reviewed-by: Jakub Jelinek <jakub@redhat.com>

diff --git a/gcc/c-family/c-cppbuiltin.cc b/gcc/c-family/c-cppbuiltin.cc
index c354c794b55e5f802794f9b0148b15a48ed3de58..195f8ae5e40b2794d58b63dbef400474e5989453 100644 (file)
--- a/gcc/c-family/c-cppbuiltin.cc
+++ b/gcc/c-family/c-cppbuiltin.cc
@@ -1092,6 +1092,7 @@ c_cpp_builtins (cpp_reader *pfile)
          cpp_define (pfile, "__cpp_structured_bindings=202403L");
          cpp_define (pfile, "__cpp_deleted_function=202403L");
          cpp_define (pfile, "__cpp_variadic_friend=202403L");
+         cpp_define (pfile, "__cpp_pack_indexing=202311L");
        }
       if (flag_concepts && cxx_dialect > cxx14)
        cpp_define (pfile, "__cpp_concepts=202002L");

diff --git a/gcc/testsuite/g++.dg/cpp26/feat-cxx26.C b/gcc/testsuite/g++.dg/cpp26/feat-cxx26.C
index c387a7dfe6095d5799563927fa92b0a0b4d28ce7..d74ff0e427bde418a5ff9d7c40f8ae9613857849 100644 (file)
--- a/gcc/testsuite/g++.dg/cpp26/feat-cxx26.C
+++ b/gcc/testsuite/g++.dg/cpp26/feat-cxx26.C
@@ -622,3 +622,9 @@
 #elif __cpp_variadic_friend != 202403
 #  error "__cpp_variadic_friend != 202403"
 #endif
+
+#ifndef __cpp_pack_indexing
+# error "__cpp_pack_indexing"
+#elif __cpp_pack_indexing != 202311
+#  error "__cpp_pack_indexing != 202311"
+#endif