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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>&
// assign(const basic_string<charT,traits>& str); // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "nasty_string.h"
#include "min_allocator.h"
#include "test_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test(S dest, S src) {
dest.assign(src);
LIBCPP_ASSERT(dest.__invariants());
assert(dest == src);
}
template <class S>
TEST_CONSTEXPR_CXX20 void
testAlloc(S dest, S src, const typename S::allocator_type& a)
{
dest.assign(src);
LIBCPP_ASSERT(dest.__invariants());
assert(dest == src);
assert(dest.get_allocator() == a);
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_assign() {
using CharT = typename S::value_type;
test(S(), S());
test(S(), S(CONVERT_TO_CSTRING(CharT, "12345")));
test(S(), S(CONVERT_TO_CSTRING(CharT, "1234567890")));
test(S(), S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "12345")), S());
test(S(CONVERT_TO_CSTRING(CharT, "12345")), S(CONVERT_TO_CSTRING(CharT, "12345")));
test(S(CONVERT_TO_CSTRING(CharT, "12345")), S(CONVERT_TO_CSTRING(CharT, "1234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "12345")), S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "1234567890")), S());
test(S(CONVERT_TO_CSTRING(CharT, "1234567890")), S(CONVERT_TO_CSTRING(CharT, "12345")));
test(S(CONVERT_TO_CSTRING(CharT, "1234567890")), S(CONVERT_TO_CSTRING(CharT, "1234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "1234567890")), S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")), S());
test(S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")), S(CONVERT_TO_CSTRING(CharT, "12345")));
test(S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")), S(CONVERT_TO_CSTRING(CharT, "1234567890")));
test(S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")), S(CONVERT_TO_CSTRING(CharT, "12345678901234567890")));
}
TEST_CONSTEXPR_CXX20 bool test() {
test_assign<std::string>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test_assign<std::wstring>();
#endif
#if TEST_STD_VER >= 20
test_assign<std::u8string>();
#endif
#if TEST_STD_VER >= 11
test_assign<std::u16string>();
test_assign<std::u32string>();
#endif
#ifndef TEST_HAS_NO_NASTY_STRING
test_assign<nasty_string>();
#endif
{
typedef std::string S;
testAlloc(S(), S(), std::allocator<char>());
testAlloc(S(), S("12345"), std::allocator<char>());
testAlloc(S(), S("1234567890"), std::allocator<char>());
testAlloc(S(), S("12345678901234567890"), std::allocator<char>());
}
{ // LWG#5579 make sure assign takes the allocators where appropriate
typedef other_allocator<char> A; // has POCCA --> true
typedef std::basic_string<char, std::char_traits<char>, A> S;
testAlloc(S(A(5)), S(A(3)), A(3));
testAlloc(S(A(5)), S("1"), A());
testAlloc(S(A(5)), S("1", A(7)), A(7));
testAlloc(S(A(5)), S("1234567890123456789012345678901234567890123456789012345678901234567890", A(7)), A(7));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
test_assign<S>();
testAlloc(S(), S(), min_allocator<char>());
testAlloc(S(), S("12345"), min_allocator<char>());
testAlloc(S(), S("1234567890"), min_allocator<char>());
testAlloc(S(), S("12345678901234567890"), min_allocator<char>());
}
#endif
#if TEST_STD_VER > 14
{
typedef std::string S;
static_assert(noexcept(S().assign(S())), ""); // LWG#2063
}
#endif
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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