On Mon, Jan 9, 2017 at 4:50 PM, Jason Merrill <ja...@redhat.com> wrote:
> The last C++17 feature was pretty trivial to implement, as expected.
...and the feature-test macro.
commit 9926adaa233a28474a12d16601a4f5a1204efbee
Author: Jason Merrill <ja...@redhat.com>
Date: Mon Jan 9 17:37:21 2017 -0500
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_variadic_using.
diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c
index 2115099..c114bbd 100644
--- a/gcc/c-family/c-cppbuiltin.c
+++ b/gcc/c-family/c-cppbuiltin.c
@@ -970,6 +970,7 @@ c_cpp_builtins (cpp_reader *pfile)
cpp_define (pfile, "__cpp_noexcept_function_type=201510");
cpp_define (pfile, "__cpp_template_auto=201606");
cpp_define (pfile, "__cpp_structured_bindings=201606");
+ cpp_define (pfile, "__cpp_variadic_using=201611");
}
if (flag_concepts)
cpp_define (pfile, "__cpp_concepts=201507");
diff --git a/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
b/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
index f61b9f5..e424e1c 100644
--- a/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
+++ b/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
@@ -404,6 +404,12 @@
# error "__cpp_template_template_args != 201611"
#endif
+#ifndef __cpp_variadic_using
+# error "__cpp_variadic_using"
+#elif __cpp_variadic_using != 201611
+# error "__cpp_variadic_using != 201611"
+#endif
+
#ifdef __has_cpp_attribute
# if ! __has_cpp_attribute(maybe_unused)
