39 lines
945 B
C++
39 lines
945 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <functional>
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//
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// reference_wrapper
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//
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// template <class... ArgTypes>
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// std::invoke_result_t<T&, ArgTypes...>
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// operator()(ArgTypes&&... args) const;
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//
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// Requires T to be a complete type (since C++20).
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#include <functional>
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struct Foo;
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Foo& get_foo();
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void test() {
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std::reference_wrapper<Foo> ref = get_foo();
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ref(0); // incomplete at the point of call
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}
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struct Foo { void operator()(int) const { } };
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Foo& get_foo() { static Foo foo; return foo; }
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int main(int, char**) {
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test();
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return 0;
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}
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