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b9a2658a3e
This patch implements the forwarding to frozen C++03 headers as discussed in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the RFC, we initially proposed selecting the right headers from the Clang driver, however consensus seemed to steer towards handling this in the library itself. This patch implements that direction. At a high level, the changes basically amount to making each public header look like this: ``` // inside <vector> #ifdef _LIBCPP_CXX03_LANG # include <__cxx03/vector> #else // normal <vector> content #endif ``` In most cases, public headers are simple umbrella headers so there isn't much code in the #else branch. In other cases, the #else branch contains the actual implementation of the header.
211 lines
8.1 KiB
C++
211 lines
8.1 KiB
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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#ifndef _LIBCPP_OSTREAM
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#define _LIBCPP_OSTREAM
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/*
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ostream synopsis
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template <class charT, class traits = char_traits<charT> >
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class basic_ostream
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: virtual public basic_ios<charT,traits>
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{
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public:
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// types (inherited from basic_ios (27.5.4)):
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typedef charT char_type;
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typedef traits traits_type;
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typedef typename traits_type::int_type int_type;
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typedef typename traits_type::pos_type pos_type;
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typedef typename traits_type::off_type off_type;
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// 27.7.2.2 Constructor/destructor:
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explicit basic_ostream(basic_streambuf<char_type,traits>* sb);
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basic_ostream(basic_ostream&& rhs);
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virtual ~basic_ostream();
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// 27.7.2.3 Assign/swap
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basic_ostream& operator=(const basic_ostream& rhs) = delete; // C++14
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basic_ostream& operator=(basic_ostream&& rhs);
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void swap(basic_ostream& rhs);
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// 27.7.2.4 Prefix/suffix:
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class sentry;
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// 27.7.2.6 Formatted output:
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basic_ostream& operator<<(basic_ostream& (*pf)(basic_ostream&));
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basic_ostream& operator<<(basic_ios<charT, traits>& (*pf)(basic_ios<charT,traits>&));
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basic_ostream& operator<<(ios_base& (*pf)(ios_base&));
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basic_ostream& operator<<(bool n);
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basic_ostream& operator<<(short n);
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basic_ostream& operator<<(unsigned short n);
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basic_ostream& operator<<(int n);
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basic_ostream& operator<<(unsigned int n);
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basic_ostream& operator<<(long n);
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basic_ostream& operator<<(unsigned long n);
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basic_ostream& operator<<(long long n);
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basic_ostream& operator<<(unsigned long long n);
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basic_ostream& operator<<(float f);
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basic_ostream& operator<<(double f);
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basic_ostream& operator<<(long double f);
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basic_ostream& operator<<(const void* p);
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basic_ostream& operator<<(const volatile void* val); // C++23
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basic_ostream& operator<<(basic_streambuf<char_type,traits>* sb);
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basic_ostream& operator<<(nullptr_t);
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// 27.7.2.7 Unformatted output:
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basic_ostream& put(char_type c);
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basic_ostream& write(const char_type* s, streamsize n);
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basic_ostream& flush();
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// 27.7.2.5 seeks:
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pos_type tellp();
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basic_ostream& seekp(pos_type);
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basic_ostream& seekp(off_type, ios_base::seekdir);
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protected:
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basic_ostream(const basic_ostream& rhs) = delete;
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basic_ostream(basic_ostream&& rhs);
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// 27.7.3.3 Assign/swap
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basic_ostream& operator=(basic_ostream& rhs) = delete;
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basic_ostream& operator=(const basic_ostream&& rhs);
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void swap(basic_ostream& rhs);
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};
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// 27.7.2.6.4 character inserters
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template<class charT, class traits>
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basic_ostream<charT,traits>& operator<<(basic_ostream<charT,traits>&, charT);
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template<class charT, class traits>
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basic_ostream<charT,traits>& operator<<(basic_ostream<charT,traits>&, char);
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, char);
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// signed and unsigned
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, signed char);
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, unsigned char);
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// NTBS
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template<class charT, class traits>
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basic_ostream<charT,traits>& operator<<(basic_ostream<charT,traits>&, const charT*);
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template<class charT, class traits>
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basic_ostream<charT,traits>& operator<<(basic_ostream<charT,traits>&, const char*);
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, const char*);
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// signed and unsigned
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, const signed char*);
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template<class traits>
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basic_ostream<char,traits>& operator<<(basic_ostream<char,traits>&, const unsigned char*);
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// swap:
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template <class charT, class traits>
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void swap(basic_ostream<charT, traits>& x, basic_ostream<charT, traits>& y);
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template <class charT, class traits>
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basic_ostream<charT,traits>& endl(basic_ostream<charT,traits>& os);
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template <class charT, class traits>
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basic_ostream<charT,traits>& ends(basic_ostream<charT,traits>& os);
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template <class charT, class traits>
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basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);
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// rvalue stream insertion
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template <class Stream, class T>
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Stream&& operator<<(Stream&& os, const T& x);
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, wchar_t) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, char8_t) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, char16_t) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, char32_t) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, char8_t) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, char16_t) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, char32_t) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, const wchar_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, const char8_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, const char16_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<char, traits>& operator<<(basic_ostream<char, traits>&, const char32_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, const char8_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, const char16_t*) = delete; // since C++20
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template<class traits>
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basic_ostream<wchar_t, traits>& operator<<(basic_ostream<wchar_t, traits>&, const char32_t*) = delete; // since C++20
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// [ostream.formatted.print], print functions
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template<class... Args> // since C++23
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void print(ostream& os, format_string<Args...> fmt, Args&&... args);
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template<class... Args> // since C++23
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void println(ostream& os, format_string<Args...> fmt, Args&&... args);
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void println(ostream& os); // since C++26
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void vprint_unicode(ostream& os, string_view fmt, format_args args); // since C++23
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void vprint_nonunicode(ostream& os, string_view fmt, format_args args); // since C++23
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} // std
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*/
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#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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# include <__cxx03/ostream>
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#else
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# include <__config>
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# if _LIBCPP_HAS_LOCALIZATION
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# include <__ostream/basic_ostream.h>
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# if _LIBCPP_STD_VER >= 23
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# include <__ostream/print.h>
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# endif
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# include <version>
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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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# endif // _LIBCPP_HAS_LOCALIZATION
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# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
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# include <atomic>
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# include <concepts>
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# include <cstdio>
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# include <cstdlib>
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# include <format>
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# include <iosfwd>
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# include <iterator>
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# include <print>
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# include <stdexcept>
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# include <type_traits>
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# endif
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#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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#endif // _LIBCPP_OSTREAM
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