32 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010 11// <functional>12 13// template<class R, class F, class... Args>14// constexpr R invoke_r(F&& f, Args&&... args) // C++2315// noexcept(is_nothrow_invocable_r_v<R, F, Args...>);16//17// Make sure that we diagnose when std::invoke_r is used with a return type that18// would yield a dangling reference to a temporary.19 20// TODO: We currently can't diagnose because we don't implement reference_converts_from_temporary.21// XFAIL: *22 23#include <functional>24#include <cassert>25 26#include "test_macros.h"27 28void f() {29 auto func = []() -> int { return 0; };30 std::invoke_r<int&&>(func); // expected-error {{Returning from invoke_r would bind a temporary object}}31}32