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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>
// basic_string<charT,traits,Allocator>&
// append(const charT* s, 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, const typename S::value_type* str, typename S::size_type n, S expected) {
s.append(str, n);
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
LIBCPP_ASSERT(is_string_asan_correct(s));
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
test(S(), "", 0, S());
test(S(), "12345", 3, S("123"));
test(S(), "12345", 4, S("1234"));
test(S(), "12345678901234567890", 0, S());
test(S(), "12345678901234567890", 1, S("1"));
test(S(), "12345678901234567890", 3, S("123"));
test(S(), "12345678901234567890", 20, S("12345678901234567890"));
test(S(), "1234567890123456789012345678901234567890", 40, S("1234567890123456789012345678901234567890"));
test(S("12345"), "", 0, S("12345"));
test(S("12345"), "12345", 5, S("1234512345"));
test(S("12345"), "1234567890", 10, S("123451234567890"));
test(S("12345678901234567890"), "", 0, S("12345678901234567890"));
test(S("12345678901234567890"), "12345", 5, S("1234567890123456789012345"));
test(S("12345678901234567890"), "12345678901234567890", 20, S("1234567890123456789012345678901234567890"));
// Starting from long string (no SSO)
test(S("1234567890123456789012345678901234567890"), "", 0, S("1234567890123456789012345678901234567890"));
test(S("1234567890123456789012345678901234567890"), "a", 1, S("1234567890123456789012345678901234567890a"));
test(S("1234567890123456789012345678901234567890"),
"aaaaaaaaaa",
10,
S("1234567890123456789012345678901234567890aaaaaaaaaa"));
test(S("1234567890123456789012345678901234567890"),
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
300,
S("1234567890123456789012345678901234567890aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaa"));
}
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
{ // test appending to self
typedef std::string S;
S s_short = "123/";
S s_long = "Lorem ipsum dolor sit amet, consectetur/";
s_short.append(s_short.data(), s_short.size());
assert(s_short == "123/123/");
s_short.append(s_short.data(), s_short.size());
assert(s_short == "123/123/123/123/");
s_short.append(s_short.data(), s_short.size());
assert(s_short == "123/123/123/123/123/123/123/123/");
s_long.append(s_long.data(), s_long.size());
assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
}
{ // check that growing to max_size() works
using string_type = std::basic_string<char, std::char_traits<char>, tiny_size_allocator<29, char> >;
string_type str;
auto max_size = str.max_size();
str.resize(max_size / 2 + max_size % 2);
str.append(str.c_str(), max_size / 2);
assert(str.capacity() >= str.size());
assert(str.size() == str.max_size());
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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