a9c9183ca4
As discussed on cfe-dev [1], use the using_if_exists Clang attribute when the compiler supports it. This makes it easier to port libc++ on top of new platforms that don't fully support the C Standard library. Previously, libc++ would fail to build when trying to import a missing declaration in a <cXXXX> header. With the attribute, the declaration will simply not be imported into namespace std, and hence it won't be available for libc++ to use. In many cases, the declarations were *not* actually required for libc++ to work (they were only surfaced for users to use them as std::XXXX), so not importing them into namespace std is acceptable. The same thing could be achieved by conscious usage of `#ifdef` along with platform detection, however that quickly creates a maintenance problem as libc++ is ported to new platforms. Furthermore, this problem is exacerbated when mixed with vendor internal-only platforms, which can lead to difficulties maintaining a downstream fork of the library. For the time being, we only use the using_if_exists attribute when it is supported. At some point in the future, we will start removing #ifdef paths that are unnecessary when the attribute is supported, and folks who need those #ifdef paths will be required to use a compiler that supports the attribute. [1]: http://lists.llvm.org/pipermail/cfe-dev/2020-June/066038.html Differential Revision: https://reviews.llvm.org/D90257
258 lines
3.6 KiB
C++
258 lines
3.6 KiB
C++
// -*- C++ -*-
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//===--------------------------- cinttypes --------------------------------===//
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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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#ifndef _LIBCPP_CINTTYPES
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#define _LIBCPP_CINTTYPES
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/*
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cinttypes synopsis
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This entire header is C99 / C++0X
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#include <cstdint> // <cinttypes> includes <cstdint>
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Macros:
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PRId8
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PRId16
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PRId32
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PRId64
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PRIdLEAST8
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PRIdLEAST16
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PRIdLEAST32
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PRIdLEAST64
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PRIdFAST8
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PRIdFAST16
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PRIdFAST32
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PRIdFAST64
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PRIdMAX
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PRIdPTR
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PRIi8
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PRIi16
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PRIi32
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PRIi64
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PRIiLEAST8
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PRIiLEAST16
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PRIiLEAST32
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PRIiLEAST64
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PRIiFAST8
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PRIiFAST16
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PRIiFAST32
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PRIiFAST64
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PRIiMAX
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PRIiPTR
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PRIo8
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PRIo16
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PRIo32
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PRIo64
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PRIoLEAST8
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PRIoLEAST16
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PRIoLEAST32
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PRIoLEAST64
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PRIoFAST8
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PRIoFAST16
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PRIoFAST32
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PRIoFAST64
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PRIoMAX
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PRIoPTR
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PRIu8
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PRIu16
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PRIu32
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PRIu64
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PRIuLEAST8
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PRIuLEAST16
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PRIuLEAST32
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PRIuLEAST64
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PRIuFAST8
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PRIuFAST16
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PRIuFAST32
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PRIuFAST64
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PRIuMAX
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PRIuPTR
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PRIx8
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PRIx16
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PRIx32
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PRIx64
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PRIxLEAST8
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PRIxLEAST16
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PRIxLEAST32
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PRIxLEAST64
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PRIxFAST8
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PRIxFAST16
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PRIxFAST32
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PRIxFAST64
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PRIxMAX
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PRIxPTR
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PRIX8
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PRIX16
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PRIX32
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PRIX64
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PRIXLEAST8
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PRIXLEAST16
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PRIXLEAST32
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PRIXLEAST64
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PRIXFAST8
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PRIXFAST16
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PRIXFAST32
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PRIXFAST64
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PRIXMAX
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PRIXPTR
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SCNd8
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SCNd16
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SCNd32
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SCNd64
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SCNdLEAST8
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SCNdLEAST16
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SCNdLEAST32
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SCNdLEAST64
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SCNdFAST8
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SCNdFAST16
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SCNdFAST32
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SCNdFAST64
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SCNdMAX
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SCNdPTR
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SCNi8
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SCNi16
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SCNi32
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SCNi64
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SCNiLEAST8
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SCNiLEAST16
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SCNiLEAST32
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SCNiLEAST64
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SCNiFAST8
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SCNiFAST16
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SCNiFAST32
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SCNiFAST64
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SCNiMAX
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SCNiPTR
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SCNo8
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SCNo16
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SCNo32
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SCNo64
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SCNoLEAST8
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SCNoLEAST16
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SCNoLEAST32
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SCNoLEAST64
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SCNoFAST8
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SCNoFAST16
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SCNoFAST32
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SCNoFAST64
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SCNoMAX
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SCNoPTR
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SCNu8
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SCNu16
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SCNu32
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SCNu64
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SCNuLEAST8
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SCNuLEAST16
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SCNuLEAST32
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SCNuLEAST64
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SCNuFAST8
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SCNuFAST16
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SCNuFAST32
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SCNuFAST64
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SCNuMAX
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SCNuPTR
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SCNx8
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SCNx16
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SCNx32
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SCNx64
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SCNxLEAST8
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SCNxLEAST16
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SCNxLEAST32
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SCNxLEAST64
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SCNxFAST8
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SCNxFAST16
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SCNxFAST32
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SCNxFAST64
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SCNxMAX
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SCNxPTR
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namespace std
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{
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Types:
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imaxdiv_t
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intmax_t imaxabs(intmax_t j);
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imaxdiv_t imaxdiv(intmax_t numer, intmax_t denom);
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intmax_t strtoimax(const char* restrict nptr, char** restrict endptr, int base);
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uintmax_t strtoumax(const char* restrict nptr, char** restrict endptr, int base);
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intmax_t wcstoimax(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
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uintmax_t wcstoumax(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
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} // std
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*/
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#include <__config>
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#include <cstdint>
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#include <inttypes.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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using ::imaxdiv_t _LIBCPP_USING_IF_EXISTS;
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using ::imaxabs _LIBCPP_USING_IF_EXISTS;
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using ::imaxdiv _LIBCPP_USING_IF_EXISTS;
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using ::strtoimax _LIBCPP_USING_IF_EXISTS;
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using ::strtoumax _LIBCPP_USING_IF_EXISTS;
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using ::wcstoimax _LIBCPP_USING_IF_EXISTS;
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using ::wcstoumax _LIBCPP_USING_IF_EXISTS;
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_CINTTYPES
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