Author: ericwf Date: Wed May 18 17:23:46 2016 New Revision: 269991 URL: http://llvm.org/viewvc/llvm-project?rev=269991&view=rev Log: 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 Modified: libcxx/trunk/include/type_traits Modified: libcxx/trunk/include/type_traits URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/type_traits?rev=269991&r1=269990&r2=269991&view=diff ============================================================================== --- libcxx/trunk/include/type_traits (original) +++ libcxx/trunk/include/type_traits Wed May 18 17:23:46 2016 @@ -1095,8 +1095,11 @@ template <class _Tp> using add_rvalue_re #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 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
