c3231d213a
Summary: The bug can be found here: http://llvm.org/bugs/show_bug.cgi?id=22468 `__invoke_void_return_wrapper` is needed to properly handle calling a function that returns a value but where the std::function return type is void. Without this '-Wsystem-headers' will cause `function::operator()(...)` to not compile. Reviewers: eugenis, K-ballo, mclow.lists Reviewed By: mclow.lists Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D7444 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@228705 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
2.2 KiB
C++
101 lines
2.2 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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// template<class F, class A> function(allocator_arg_t, const A&, F);
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#include <functional>
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#include <cassert>
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#include "test_allocator.h"
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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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class Foo {
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public:
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void bar(int k) { }
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};
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int main()
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{
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{
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std::function<int(int)> f(std::allocator_arg, test_allocator<A>(), A());
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assert(A::count == 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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{
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std::function<int(int)> f(std::allocator_arg, test_allocator<int(*)(int)>(), g);
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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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{
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std::function<int(int)> f(std::allocator_arg, test_allocator<int(*)(int)>(),
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(int (*)(int))0);
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assert(!f);
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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(std::allocator_arg,
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test_allocator<int(A::*)(int)const>(),
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&A::foo);
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assert(f);
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assert(f.target<int (A::*)(int) const>() != 0);
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}
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#if __cplusplus >= 201103L
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{
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Foo f;
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std::function<void(int)> fun = std::bind(&Foo::bar, &f, std::placeholders::_1);
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fun(10);
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}
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#endif
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{
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std::function<void(int)> fun(std::allocator_arg,
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test_allocator<int(*)(int)>(),
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&g);
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assert(fun);
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assert(fun.target<int(*)(int)>() != 0);
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fun(10);
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}
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}
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