Louis Dionne f4c1258d56 [libc++] Add an option to disable wide character support in libc++
Some embedded platforms do not wish to support the C library functionality
for handling wchar_t because they have no use for it. It makes sense for
libc++ to work properly on those platforms, so this commit adds a carve-out
of functionality for wchar_t.

Unfortunately, unlike some other carve-outs (e.g. random device), this
patch touches several parts of the library. However, despite the wide
impact of this patch, I still think it is important to support this
configuration since it makes it much simpler to port libc++ to some
embedded platforms.

Differential Revision: https://reviews.llvm.org/D111265
2021-10-12 06:08:23 -04:00

40 lines
1.1 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <string>
// Test that <string> provides all of the arithmetic, enum, and pointer
// hash specializations.
#include <string>
#include "poisoned_hash_helper.h"
#include "test_macros.h"
int main(int, char**) {
test_library_hash_specializations_available();
{
test_hash_enabled_for_type<std::string>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test_hash_enabled_for_type<std::wstring>();
#endif
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
test_hash_enabled_for_type<std::u8string>();
#endif
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
test_hash_enabled_for_type<std::u16string>();
test_hash_enabled_for_type<std::u32string>();
#endif
}
return 0;
}