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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 "asan_testing.h"
#include "make_string.h"
#include "min_allocator.h"
#include "test_macros.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test(S s, typename S::size_type n, S expected) {
s.resize(n);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
LIBCPP_ASSERT(is_string_asan_correct(s));
}
template <class CharT, class Alloc>
TEST_CONSTEXPR_CXX20 void test_string() {
{
using string_type = std::basic_string<CharT, std::char_traits<CharT>, Alloc>;
test(string_type(), 0, string_type());
test(string_type(), 1, string_type(1, '\0'));
test(string_type(), 10, string_type(10, '\0'));
test(string_type(), 100, string_type(100, '\0'));
test(string_type(MAKE_CSTRING(CharT, "12345")), 0, string_type());
test(string_type(MAKE_CSTRING(CharT, "12345")), 2, string_type(MAKE_CSTRING(CharT, "12")));
test(string_type(MAKE_CSTRING(CharT, "12345")), 5, string_type(MAKE_CSTRING(CharT, "12345")));
test(string_type(MAKE_CSTRING(CharT, "12345")),
15,
string_type(MAKE_CSTRING(CharT, "12345\0\0\0\0\0\0\0\0\0\0"), 15));
test(string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890")), 0, string_type());
test(string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890")),
10,
string_type(MAKE_CSTRING(CharT, "1234567890")));
test(string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890")),
50,
string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890")));
test(
string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890")),
60,
string_type(MAKE_CSTRING(CharT, "12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0"), 60));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) {
std::basic_string<CharT, std::char_traits<CharT>, Alloc> str;
try {
str.resize(std::string::npos);
assert(false);
} catch (const std::length_error&) {
}
}
#endif
{ // check that string can grow to max_size()
std::basic_string<CharT, std::char_traits<CharT>, tiny_size_allocator<32, CharT> > str;
str.resize(str.max_size());
assert(str.size() == str.max_size());
}
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<char, std::allocator<char> >();
#if TEST_STD_VER >= 11
test_string<char, min_allocator<char>>();
test_string<char, safe_allocator<char>>();
#endif
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test_string<wchar_t, std::allocator<wchar_t> >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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