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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11
// <string>
// iterator begin(); // constexpr since C++20
// iterator end(); // constexpr since C++20
// const_iterator begin() const; // constexpr since C++20
// const_iterator end() const; // constexpr since C++20
// const_iterator cbegin() const; // constexpr since C++20
// const_iterator cend() const; // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
template <class C>
TEST_CONSTEXPR_CXX20 void test() {
{ // N3644 testing
typename C::iterator ii1{}, ii2{};
typename C::iterator ii4 = ii1;
typename C::const_iterator cii{};
assert(ii1 == ii2);
assert(ii1 == ii4);
assert(!(ii1 != ii2));
assert((ii1 == cii));
assert((cii == ii1));
assert(!(ii1 != cii));
assert(!(cii != ii1));
assert(!(ii1 < cii));
assert(!(cii < ii1));
assert((ii1 <= cii));
assert((cii <= ii1));
assert(!(ii1 > cii));
assert(!(cii > ii1));
assert((ii1 >= cii));
assert((cii >= ii1));
assert(cii - ii1 == 0);
assert(ii1 - cii == 0);
}
{
C a;
typename C::iterator i1 = a.begin();
typename C::iterator i2;
i2 = i1;
assert(i1 == i2);
}
}
TEST_CONSTEXPR_CXX20 bool test() {
test<std::string>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<std::wstring>();
#endif
#ifndef TEST_HAS_NO_CHAR8_T
test<std::u8string>();
#endif
test<std::u16string>();
test<std::u32string>();
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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