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[libcxx] Fix PR22771 - Support access control SFINAE in the library version of is_convertible.

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Summary:
Currently the conversion check does not take place in a context where access control SFINAE is applied. This patch changes the context of the test expression so that SFINAE occurs if access control does not permit the conversion.

Related bug: https://llvm.org/bugs/show_bug.cgi?id=22771

Reviewers: mclow.lists, rsmith, dim

Reviewed By: dim

Subscribers: dim, rodrigc, emaste, cfe-commits

Differential Revision: http://reviews.llvm.org/D8461

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@233552 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2015-03-30 15:22:20 +00:00
parent 4f274d0633
commit 4bd15469a9
2 changed files with 18 additions and 5 deletions
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6
test/std/utilities/meta/meta.rel/is_convertible.pass.cpp
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@@ -186,4 +186,10 @@ int main()
static_assert((std::is_convertible<volatile NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((std::is_convertible<const volatile NonCopyable&, const volatile NonCopyable&>::value), "");
static_assert((!std::is_convertible<const NonCopyable&, NonCopyable&>::value), "");
// This test requires Access control SFINAE which we only have in C++11 or when
// we are using the compiler builtin for is_convertible.
#if __cplusplus >= 201103L || !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK)
test_is_not_convertible<NonCopyable&, NonCopyable>();
#endif
}