Louis Dionne e24ddb6027 [libc++] Use std::addressof in std::function::target
This guards against hostile overloads of operator&. Thanks to Peter Dimov
for the report in https://github.com/boostorg/lambda/issues/24.

Differential Revision: https://reviews.llvm.org/D116380
2022-01-04 12:31:45 -05:00

33 lines
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <functional>
// class function<R(ArgTypes...)>
// This test runs in C++03, but we have deprecated using std::function in C++03.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
// Make sure we can use std::function with a type that has a hostile overload
// of operator&().
#include <functional>
#include <cassert>
#include "operator_hijacker.h"
struct TrapAddressof : operator_hijacker {
int operator()() const { return 1; }
};
int main(int, char**) {
std::function<int()> f = TrapAddressof();
assert(f() == 1);
return 0;
}