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Create macro to allow testing of is_convertible without the compiler builtin.

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Summary: This patch also fixes one test case that failed in the library version of is_convertible.

Reviewers: mclow.lists, EricWF

Reviewed By: EricWF

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D8456

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@232764 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier 2015-03-19 21:11:02 +00:00
parent 02c24c1d3b
commit ffbfbcda66
1 changed files with 2 additions and 1 deletions
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3
include/type_traits
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@ -838,7 +838,7 @@ struct _LIBCPP_TYPE_VIS_ONLY is_base_of
// is_convertible
#if __has_feature(is_convertible_to)
#if __has_feature(is_convertible_to) && !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK)
template <class _T1, class _T2> struct _LIBCPP_TYPE_VIS_ONLY is_convertible
: public integral_constant<bool, __is_convertible_to(_T1, _T2) &&
@ -900,6 +900,7 @@ struct __is_convertible
template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 0> : false_type {};
template <class _T1> struct __is_convertible<_T1, const _T1&, 1, 0> : true_type {};
template <class _T1> struct __is_convertible<const _T1, const _T1&, 1, 0> : true_type {};
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _T1> struct __is_convertible<_T1, _T1&&, 1, 0> : true_type {};
template <class _T1> struct __is_convertible<_T1, const _T1&&, 1, 0> : true_type {};