c52f43e72d
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111767 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
1.6 KiB
C++
87 lines
1.6 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 distributed under the University of Illinois Open Source
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// License. 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& operator=(nullptr_t);
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#include <functional>
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#include <new>
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#include <cstdlib>
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#include <cassert>
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int new_called = 0;
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void* operator new(std::size_t s) throw(std::bad_alloc)
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{
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++new_called;
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return std::malloc(s);
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}
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void operator delete(void* p) throw()
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{
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--new_called;
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std::free(p);
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}
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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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};
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int A::count = 0;
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int g(int) {return 0;}
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int main()
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{
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assert(new_called == 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(new_called == 1);
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assert(f.target<A>());
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f = nullptr;
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assert(A::count == 0);
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assert(new_called == 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(int)> f = g;
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assert(new_called == 0);
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assert(f.target<int(*)(int)>());
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assert(f.target<A>() == 0);
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f = nullptr;
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assert(new_called == 0);
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assert(f.target<int(*)(int)>() == 0);
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}
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}
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