llvm-project/libcxx/test/support/make_string.h

64 lines
2.2 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef SUPPORT_TEST_MAKE_STRING_H
#define SUPPORT_TEST_MAKE_STRING_H
#include "test_macros.h"
#if TEST_STD_VER < 11
#error This header requires C++11 or greater
#endif
#include <string>
#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
#define CHAR8_ONLY(x) x,
#else
#define CHAR8_ONLY(x)
#endif
#define MKSTR(Str) \
{ \
Str, TEST_CONCAT(L, Str), \
CHAR8_ONLY(TEST_CONCAT(u8, Str)) TEST_CONCAT(u, Str), \
TEST_CONCAT(U, Str) \
}
struct MultiStringType {
const char* s;
const wchar_t* w;
#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
const char8_t* u8;
#endif
const char16_t* u16;
const char32_t* u32;
constexpr operator const char*() const { return s; }
constexpr operator const wchar_t*() const { return w; }
#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
constexpr operator const char8_t*() const { return u8; }
#endif
constexpr operator const char16_t*() const { return u16; }
constexpr operator const char32_t*() const { return u32; }
};
// Helper to convert a const char* string to a basic_string<CharT>.
// This helper is used in unit tests to make them generic. The input should be
// valid ASCII which means the input is also valid UTF-8.
#define MAKE_STRING(CharT, Str) \
std::basic_string<CharT> { \
static_cast<const CharT*>(MultiStringType MKSTR(Str)) \
}
// Like MAKE_STRING but converts to a const CharT*.
#define MAKE_CSTRING(CharT, Str) \
static_cast<const CharT*>(MultiStringType MKSTR(Str))
#endif