13f5579cae
std::bind is supposed to be constexpr-friendly since C++20 and it was marked as such in our synopsis. However, the tests were not actually testing any of it and as it happens, std::bind was not really constexpr friendly. This fixes the issue and makes sure that at least some of the tests are running in constexpr mode. Some tests for std::bind check functions that return void, and those use global variables. These tests haven't been made constexpr-friendly, however the coverage added by this patch should be sufficient to get decent confidence. Differential Revision: https://reviews.llvm.org/D149295
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++03
|
|
|
|
// <functional>
|
|
|
|
// template<CopyConstructible Fn, CopyConstructible... Types>
|
|
// unspecified bind(Fn, Types...); // constexpr since C++20
|
|
// template<Returnable R, CopyConstructible Fn, CopyConstructible... Types>
|
|
// unspecified bind(Fn, Types...); // constexpr since C++20
|
|
|
|
// https://llvm.org/PR23141
|
|
#include <functional>
|
|
#include <type_traits>
|
|
|
|
#include "test_macros.h"
|
|
|
|
struct Fun {
|
|
template<typename T, typename U>
|
|
TEST_CONSTEXPR_CXX20 void operator()(T &&, U &&) const {
|
|
static_assert(std::is_same<U, int &>::value, "");
|
|
}
|
|
};
|
|
|
|
TEST_CONSTEXPR_CXX20 bool test() {
|
|
std::bind(Fun{}, std::placeholders::_1, 42)("hello");
|
|
return true;
|
|
}
|
|
|
|
int main(int, char**) {
|
|
test();
|
|
#if TEST_STD_VER >= 20
|
|
static_assert(test());
|
|
#endif
|
|
|
|
return 0;
|
|
}
|