forked from OSchip/llvm-project
116 lines
2.7 KiB
C++
116 lines
2.7 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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// class function<R(ArgTypes...)>
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// function(F);
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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#include "count_new.hpp"
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class A
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{
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int data_[10];
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public:
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static int count;
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A()
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{
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++count;
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for (int i = 0; i < 10; ++i)
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data_[i] = i;
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}
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A(const A&) {++count;}
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~A() {--count;}
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int operator()(int i) const
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{
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for (int j = 0; j < 10; ++j)
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i += data_[j];
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return i;
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}
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int foo(int) const {return 1;}
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};
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int A::count = 0;
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int g(int) {return 0;}
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#if TEST_STD_VER >= 11
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struct RValueCallable {
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template <class ...Args>
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void operator()(Args&&...) && {}
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};
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struct LValueCallable {
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template <class ...Args>
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void operator()(Args&&...) & {}
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};
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#endif
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int main()
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{
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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std::function<int(int)> f = A();
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assert(A::count == 1);
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assert(globalMemCounter.checkOutstandingNewEq(1));
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assert(f.target<A>());
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assert(f.target<int(*)(int)>() == 0);
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}
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assert(A::count == 0);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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std::function<int(int)> f = g;
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f.target<int(*)(int)>());
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assert(f.target<A>() == 0);
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}
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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std::function<int(int)> f = (int (*)(int))0;
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assert(!f);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f.target<int(*)(int)>() == 0);
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assert(f.target<A>() == 0);
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}
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{
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std::function<int(const A*, int)> f = &A::foo;
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assert(f);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f.target<int (A::*)(int) const>() != 0);
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}
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{
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std::function<void(int)> f(&g);
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assert(f);
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assert(f.target<int(*)(int)>() != 0);
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f(1);
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}
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{
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std::function <void()> f(static_cast<void (*)()>(0));
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assert(!f);
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}
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#if TEST_STD_VER >= 11
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{
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using Fn = std::function<void(int, int, int)>;
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static_assert(std::is_constructible<Fn, LValueCallable&>::value, "");
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static_assert(std::is_constructible<Fn, LValueCallable>::value, "");
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static_assert(!std::is_constructible<Fn, RValueCallable&>::value, "");
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static_assert(!std::is_constructible<Fn, RValueCallable>::value, "");
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}
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#endif
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}
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