This patch optimizes the compilation performance of std::is_invocable
by dispatching to the new __builtin_is_invocable trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_invocable): Use
__builtin_is_invocable trait.
* testsuite/20_util/is_invocable/incomplete_args_neg.cc: Handle
the new error from __builtin_is_invocable.
* testsuite/20_util/is_invocable/incomplete_neg.cc: Likewise.
Signed-off-by: Ken Matsui <kmat...@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 4 ++++
.../testsuite/20_util/is_invocable/incomplete_args_neg.cc | 1 +
libstdc++-v3/testsuite/20_util/is_invocable/incomplete_neg.cc | 1 +
3 files changed, 6 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits
b/libstdc++-v3/include/std/type_traits
index 30ee9ee0e8a..95e31d19907 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -3239,7 +3239,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// std::is_invocable
template<typename _Fn, typename... _ArgTypes>
struct is_invocable
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__builtin_is_invocable)
+ : public __bool_constant<__builtin_is_invocable(_Fn, _ArgTypes...)>
+#else
: __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
+#endif
{
static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
"_Fn must be a complete class or an unbounded array");
diff --git a/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_args_neg.cc
b/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_args_neg.cc
index a575750f9e9..9619129b817 100644
--- a/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_args_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_args_neg.cc
@@ -18,6 +18,7 @@
// <http://www.gnu.org/licenses/>.
// { dg-error "must be a complete class" "" { target *-*-* } 0 }
+// { dg-prune-output "invalid use of incomplete type" }
#include <type_traits>
diff --git a/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_neg.cc
b/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_neg.cc
index 05848603555..b478ebce815 100644
--- a/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/is_invocable/incomplete_neg.cc
@@ -18,6 +18,7 @@
// <http://www.gnu.org/licenses/>.
// { dg-error "must be a complete class" "" { target *-*-* } 0 }
+// { dg-prune-output "invalid use of incomplete type" }
#include <type_traits>
--
2.44.0
