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Add void_t and invoke feature test macros

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@284209 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2016-10-14 07:19:52 +00:00
parent bf702696d4
commit 48aa2e14a2
4 changed files with 79 additions and 0 deletions
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39
test/std/utilities/function.objects/func.invoke/invoke_feature_test_macro.pass.cpp Normal file
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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <functional>
// template <class F, class ...Args>
// result_of_t<F&&(Args&&...)> invoke(F&&, Args&&...);
#include <functional>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER <= 14
# ifdef __cpp_lib_invoke
# error Feature test macro should be defined
# endif
#else
# ifndef __cpp_lib_invoke
# error Feature test macro not defined
# endif
# if __cpp_lib_invoke != 201411
# error __cpp_lib_invoke has the wrong value
# endif
#endif
int foo(int) { return 42; }
int main() {
#if defined(__cpp_lib_invoke)
assert(std::invoke(foo, 101) == 42);
#endif
}