From: Patrick Palka <ppalka@redhat.com>
To: gcc-patches@gcc.gnu.org
Cc: libstdc++@gcc.gnu.org, Patrick Palka <ppalka@redhat.com>
Subject: [PATCH] libstdc++: Implement LWG 3557 change to convertible_to
Date: Fri, 18 Jun 2021 11:12:01 -0400 [thread overview]
Message-ID: <20210618151201.1703195-1-ppalka@redhat.com> (raw)
libstdc++-v3/ChangeLog:
* include/std/concepts (convertible_to): Just use declval as per
LWG 3557.
---
libstdc++-v3/include/std/concepts | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/libstdc++-v3/include/std/concepts b/libstdc++-v3/include/std/concepts
index 4490f534412..7f5421f1475 100644
--- a/libstdc++-v3/include/std/concepts
+++ b/libstdc++-v3/include/std/concepts
@@ -70,9 +70,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// [concept.convertible], concept convertible_to
template<typename _From, typename _To>
concept convertible_to = is_convertible_v<_From, _To>
- && requires(add_rvalue_reference_t<_From> (&__f)()) {
- static_cast<_To>(__f());
- };
+ && requires { static_cast<_To>(std::declval<_From>()); };
/// [concept.commonref], concept common_reference_with
template<typename _Tp, typename _Up>
--
2.32.0.93.g670b81a890
next reply other threads:[~2021-06-18 15:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 15:12 Patrick Palka [this message]
2021-06-18 15:19 ` Jonathan Wakely
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