libcxx

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Files

Eric Fiselier 2c6c2b944e Fix __libcpp_is_constructible for source types with explicit conversion operators.

Previously __libcpp_is_constructible checked the validity of reference
construction using 'eat<To>(declval<From>())' but this doesn't consider
From's explicit conversion operators. This patch teaches __libcpp_is_constructible
how to handle these cases. To do this we need to check the validity
using 'static_cast<To>(declval<From>())'. Unfortunately static_cast allows
additional base-to-derived and lvalue-to-rvalue conversions, which have to be
checked for and manually rejected.

While implementing these changes I discovered that Clang incorrectly
rejects `static_cast<int&&>(declval<float&>())` even though
`int &&X(declval<float&>())` is well formed. In order to tolerate this bug
the `__eat<T>(...)` needs to be left in-place. Otherwise it could be replaced
entirely with the new static_cast implementation.

Thanks to Walter Brown for providing the test cases.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@285786 91177308-0d34-0410-b5e6-96231b3b80d8

2016-11-02 03:57:34 +00:00

allocator.adaptor

Remove all instances of _LIBCPP_HAS_NO_RVALUE_REFERENCES from test/std/utilities

2016-10-01 10:46:01 +00:00

any

Cleanup nonportable behavior in tests for std::any

2016-10-26 20:18:13 +00:00

function.objects

Update LWG 2767 and add test case

2016-10-16 03:45:06 +00:00

intseq

Fix two more tests that hang when testing against libstdc++

2016-10-12 04:56:23 +00:00

memory

Change from "XFAIL: libcpp-no-exceptions" to "UNSUPPORTED: libcpp-no-exceptions" tests that only check exceptions and nothing else

2016-10-31 08:47:53 +00:00