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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
//
//===----------------------------------------------------------------------===//
// <string>
// void resize(size_type n); // constexpr since C++20
#include <string>
#include <stdexcept>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
#include "asan_testing.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test(S s, typename S::size_type n, S expected) {
if (n <= s.max_size()) {
s.resize(n);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
LIBCPP_ASSERT(is_string_asan_correct(s));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else if (!TEST_IS_CONSTANT_EVALUATED) {
try {
s.resize(n);
assert(false);
} catch (std::length_error&) {
assert(n > s.max_size());
}
}
#endif
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
test(S(), 0, S());
test(S(), 1, S(1, '\0'));
test(S(), 10, S(10, '\0'));
test(S(), 100, S(100, '\0'));
test(S("12345"), 0, S());
test(S("12345"), 2, S("12"));
test(S("12345"), 5, S("12345"));
test(S("12345"), 15, S("12345\0\0\0\0\0\0\0\0\0\0", 15));
test(S("12345678901234567890123456789012345678901234567890"), 0, S());
test(S("12345678901234567890123456789012345678901234567890"), 10, S("1234567890"));
test(S("12345678901234567890123456789012345678901234567890"),
50,
S("12345678901234567890123456789012345678901234567890"));
test(S("12345678901234567890123456789012345678901234567890"),
60,
S("12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0", 60));
test(S(), S::npos, S("not going to happen"));
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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