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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
//
//===----------------------------------------------------------------------===//
// Ensure that we never change the size or alignment of `basic_string`
#include <cstdint>
#include <iterator>
#include <string>
#include "test_macros.h"
#include "min_allocator.h"
#include "test_allocator.h"
template <class T>
class small_pointer {
public:
using value_type = T;
using difference_type = std::int16_t;
using pointer = small_pointer;
using reference = T&;
using iterator_category = std::random_access_iterator_tag;
private:
std::uint16_t offset;
};
template <class T>
class small_iter_allocator {
public:
using value_type = T;
using pointer = small_pointer<T>;
using size_type = std::int16_t;
using difference_type = std::int16_t;
small_iter_allocator() TEST_NOEXCEPT {}
template <class U>
small_iter_allocator(small_iter_allocator<U>) TEST_NOEXCEPT {}
T* allocate(std::size_t n);
void deallocate(T* p, std::size_t);
friend bool operator==(small_iter_allocator, small_iter_allocator) { return true; }
friend bool operator!=(small_iter_allocator, small_iter_allocator) { return false; }
};
template <class CharT>
using min_string = std::basic_string<CharT, std::char_traits<CharT>, min_allocator<CharT> >;
template <class CharT>
using test_string = std::basic_string<CharT, std::char_traits<CharT>, test_allocator<CharT> >;
template <class CharT>
using small_string = std::basic_string<CharT, std::char_traits<CharT>, small_iter_allocator<CharT> >;
#if __SIZE_WIDTH__ == 64
static_assert(sizeof(std::string) == 24, "");
static_assert(sizeof(min_string<char>) == 24, "");
static_assert(sizeof(test_string<char>) == 32, "");
static_assert(sizeof(small_string<char>) == 6, "");
# ifndef TEST_HAS_NO_WIDE_CHARACTERS
# if __WCHAR_WIDTH__ == 32
static_assert(sizeof(std::wstring) == 24, "");
static_assert(sizeof(min_string<wchar_t>) == 24, "");
static_assert(sizeof(test_string<wchar_t>) == 32, "");
static_assert(sizeof(small_string<wchar_t>) == 12, "");
# elif __WCHAR_WIDTH__ == 16
static_assert(sizeof(std::wstring) == 24, "");
static_assert(sizeof(min_string<wchar_t>) == 24, "");
static_assert(sizeof(test_string<wchar_t>) == 32, "");
static_assert(sizeof(small_string<wchar_t>) == 6, "");
# else
# error "Unexpected wchar_t width"
# endif
# endif
# ifndef TEST_HAS_NO_CHAR8_T
static_assert(sizeof(std::u8string) == 24, "");
static_assert(sizeof(min_string<char8_t>) == 24, "");
static_assert(sizeof(test_string<char8_t>) == 32, "");
static_assert(sizeof(small_string<char8_t>) == 6, "");
# endif
# ifndef TEST_HAS_NO_UNICODE_CHARS
static_assert(sizeof(std::u16string) == 24, "");
static_assert(sizeof(std::u32string) == 24, "");
static_assert(sizeof(min_string<char16_t>) == 24, "");
static_assert(sizeof(min_string<char32_t>) == 24, "");
static_assert(sizeof(test_string<char16_t>) == 32, "");
static_assert(sizeof(test_string<char32_t>) == 32, "");
static_assert(sizeof(small_string<char16_t>) == 6, "");
static_assert(sizeof(small_string<char32_t>) == 12, "");
# endif
#elif __SIZE_WIDTH__ == 32
static_assert(sizeof(std::string) == 12, "");
static_assert(sizeof(min_string<char>) == 12, "");
static_assert(sizeof(test_string<char>) == 24, "");
static_assert(sizeof(small_string<char>) == 6, "");
# ifndef TEST_HAS_NO_WIDE_CHARACTERS
# if __WCHAR_WIDTH__ == 32
static_assert(sizeof(std::wstring) == 12, "");
static_assert(sizeof(min_string<wchar_t>) == 12, "");
static_assert(sizeof(test_string<wchar_t>) == 24, "");
static_assert(sizeof(small_string<wchar_t>) == 12, "");
# elif __WCHAR_WIDTH__ == 16
static_assert(sizeof(std::wstring) == 12, "");
static_assert(sizeof(min_string<wchar_t>) == 12, "");
static_assert(sizeof(test_string<wchar_t>) == 24, "");
static_assert(sizeof(small_string<wchar_t>) == 6, "");
# else
# error "Unexpected wchar_t width"
# endif
# endif
# ifndef TEST_HAS_NO_CHAR8_T
static_assert(sizeof(std::u8string) == 12, "");
static_assert(sizeof(min_string<char8_t>) == 12, "");
static_assert(sizeof(test_string<char8_t>) == 24, "");
static_assert(sizeof(small_string<char>) == 6, "");
# endif
# ifndef TEST_HAS_NO_UNICODE_CHARS
static_assert(sizeof(std::u16string) == 12, "");
static_assert(sizeof(std::u32string) == 12, "");
static_assert(sizeof(min_string<char16_t>) == 12, "");
static_assert(sizeof(min_string<char32_t>) == 12, "");
static_assert(sizeof(test_string<char16_t>) == 24, "");
static_assert(sizeof(test_string<char32_t>) == 24, "");
static_assert(sizeof(small_string<char16_t>) == 6, "");
static_assert(sizeof(small_string<char32_t>) == 12, "");
# endif
#else
# error "std::size_t has an unexpected size"
#endif
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