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| author | Eric Fiselier <eric@efcs.ca> | 2016-05-18 22:23:46 +0000 |
|---|---|---|
| committer | Eric Fiselier <eric@efcs.ca> | 2016-05-18 22:23:46 +0000 |
| commit | ae7619a8a358667ea6ade5050512d0a27c03f432 (patch) | |
| tree | a5f67f15ba68d7e82980e53f8a191ef2f85b61fb | |
| parent | f3587ec955b7b00b4e6c206c24213d621cea6157 (diff) | |
| download | bcm5719-llvm-ae7619a8a358667ea6ade5050512d0a27c03f432.tar.gz bcm5719-llvm-ae7619a8a358667ea6ade5050512d0a27c03f432.zip | |
Optimize declval for compile times. Patch from Eric Niebler.
This patch implements the C++11 version of declval without requiring a template
instantiation.
See PR27798 for more information. https://llvm.org/bugs/show_bug.cgi?id=27798
llvm-svn: 269991
| -rw-r--r-- | libcxx/include/type_traits | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits index 2b14160bedd..ad32376b666 100644 --- a/libcxx/include/type_traits +++ b/libcxx/include/type_traits @@ -1095,8 +1095,11 @@ template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_referenc #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES +template <class _Tp> _Tp&& __declval(int); +template <class _Tp> _Tp __declval(long); + template <class _Tp> -typename add_rvalue_reference<_Tp>::type +decltype(_VSTD::__declval<_Tp>(0)) declval() _NOEXCEPT; #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
