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78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// template<Returnable R, class T, CopyConstructible... Args>
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// unspecified mem_fn(R (T::* pm)(Args...));
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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struct A
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{
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char test0() {return 'a';}
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char test1(int) {return 'b';}
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char test2(int, double) {return 'c';}
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};
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template <class F>
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void
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test0(F f)
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{
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{
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A a;
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assert(f(a) == 'a');
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A* ap = &a;
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assert(f(ap) == 'a');
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const F& cf = f;
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assert(cf(ap) == 'a');
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}
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}
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template <class F>
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void
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test1(F f)
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{
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{
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A a;
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assert(f(a, 1) == 'b');
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A* ap = &a;
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assert(f(ap, 2) == 'b');
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const F& cf = f;
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assert(cf(ap, 2) == 'b');
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}
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}
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template <class F>
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void
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test2(F f)
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{
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{
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A a;
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assert(f(a, 1, 2) == 'c');
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A* ap = &a;
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assert(f(ap, 2, 3.5) == 'c');
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const F& cf = f;
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assert(cf(ap, 2, 3.5) == 'c');
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}
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}
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int main()
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{
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test0(std::mem_fn(&A::test0));
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test1(std::mem_fn(&A::test1));
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test2(std::mem_fn(&A::test2));
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#if TEST_STD_VER >= 11
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static_assert((noexcept(std::mem_fn(&A::test0))), ""); // LWG#2489
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#endif
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}
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