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This is a preparation for P2093R14 Formatted output When the output of print is to the terminal it needs to use the native API. This means transcoding UTF-8 to UTF-16 on Windows. The encoder's interface is modeled after P2728 Unicode in the Library, Part 1: UTF Transcoding But only the required part for P2093R14 is implemented. On Windows wchar_t is 16 bits, in order to test on platforms where wchar_t is 32 bits the transcoder has support for char16_t. It also adds and UTF-8 to UTF-32 encoder which is useful for other tests. Note it is possible to use <codecvt> for transcoding, but that header is deprecated. So rather write new code that is not deprecated; the hard part, decoding, has already been done. The <codecvt> header also requires locale support while the new code works without including <locale>. Note the current transcoder implementation can be optimized since it basically does UTF-8 -> UTF-32 -> UTF-16. The first goal is to have a working implementation. Since it's not part of the ABI it's possible to do the optimization later. Depends on D149672 Reviewed By: ldionne, tahonermann, #libc Differential Revision: https://reviews.llvm.org/D150031
24 lines
629 B
C++
24 lines
629 B
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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module;
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#include <print>
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export module std:print;
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export namespace std {
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#if 0
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// [print.fun], print functions
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using std::print;
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using std::println;
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using std::vprint_nonunicode;
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using std::vprint_unicode;
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#endif
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} // namespace std
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