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[patch] Use std::__bool_constant instead of duplicating it
- From: Jonathan Wakely <jwakely at redhat dot com>
- To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- Date: Thu, 8 Jan 2015 13:27:27 +0000
- Subject: [patch] Use std::__bool_constant instead of duplicating it
- Authentication-results: sourceware.org; auth=none
This is a tiny patch to use the new __bool_constant helper in
hashtable_policy.h instead of defining another identical alias.
Tested x86_64-linux, committed to trunk.
commit 3fa3e0af59fa4371f61e95eeaab240d3b974b62e
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed Apr 16 18:20:30 2014 +0100
* include/bits/hashtable_policy.h: Use __bool_constant.
diff --git a/libstdc++-v3/include/bits/hashtable_policy.h b/libstdc++-v3/include/bits/hashtable_policy.h
index 1251ef0..14bcca6 100644
--- a/libstdc++-v3/include/bits/hashtable_policy.h
+++ b/libstdc++-v3/include/bits/hashtable_policy.h
@@ -81,7 +81,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Helper type used to detect whether the hash functor is noexcept.
template <typename _Key, typename _Hash>
- struct __is_noexcept_hash : std::integral_constant<bool,
+ struct __is_noexcept_hash : std::__bool_constant<
noexcept(declval<const _Hash&>()(declval<const _Key&>()))>
{ };
@@ -211,9 +211,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<bool _Cache_hash_code, bool _Constant_iterators, bool _Unique_keys>
struct _Hashtable_traits
{
- template<bool _Cond>
- using __bool_constant = integral_constant<bool, _Cond>;
-
using __hash_cached = __bool_constant<_Cache_hash_code>;
using __constant_iterators = __bool_constant<_Constant_iterators>;
using __unique_keys = __bool_constant<_Unique_keys>;