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Add noexcept to std::integral_constant members

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Backport from mainline
2017-12-01  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/type_traits (integral_constant): Make member functions
	noexcept (LWG 2346).
	* include/std/utility (integer_sequence): Likewise.

From-SVN: r255328
This commit is contained in:
Jonathan Wakely 2017-12-01 17:12:18 +00:00 committed by Jonathan Wakely
parent 32d94e772e
commit 526e9a2a50
3 changed files with 10 additions and 3 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,5 +1,12 @@
2017-12-01 Jonathan Wakely <jwakely@redhat.com> 2017-12-01 Jonathan Wakely <jwakely@redhat.com>
Backport from mainline
2017-12-01 Jonathan Wakely <jwakely@redhat.com>
* include/std/type_traits (integral_constant): Make member functions
noexcept (LWG 2346).
* include/std/utility (integer_sequence): Likewise.
Backport from mainline Backport from mainline
2017-11-16 Jonathan Wakely <jwakely@redhat.com> 2017-11-16 Jonathan Wakely <jwakely@redhat.com>

4
libstdc++-v3/include/std/type_traits
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@ -71,12 +71,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
static constexpr _Tp value = __v; static constexpr _Tp value = __v;
typedef _Tp value_type; typedef _Tp value_type;
typedef integral_constant<_Tp, __v> type; typedef integral_constant<_Tp, __v> type;
constexpr operator value_type() const { return value; } constexpr operator value_type() const noexcept { return value; }
#if __cplusplus > 201103L #if __cplusplus > 201103L
#define __cpp_lib_integral_constant_callable 201304 #define __cpp_lib_integral_constant_callable 201304
constexpr value_type operator()() const { return value; } constexpr value_type operator()() const noexcept { return value; }
#endif #endif
}; };

2
libstdc++-v3/include/std/utility
View File

@ -323,7 +323,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct integer_sequence struct integer_sequence
{ {
typedef _Tp value_type; typedef _Tp value_type;
static constexpr size_t size() { return sizeof...(_Idx); } static constexpr size_t size() noexcept { return sizeof...(_Idx); }
}; };
template<typename _Tp, _Tp _Num, template<typename _Tp, _Tp _Num,