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07afd76b7c
libc++ (http://libcxx.llvm.org/) is used on OS X with newer XCode. The patch is from Benjamin Piwowarski <benjamin.piwowarski@lip6.fr>, I only added more comments. The changes regarding implicit conversion to bool of std::iostream work because both the C++98 and C++11 standards guarantee that boolean evaluation of streams returns !fail(). See e.g. http://stackoverflow.com/questions/1334858/why-dont-iostream-objects-overload-operator-bool for details.
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
// -*- C++ -*-
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// Heavily inspired by /usr/include/c++/4.1/bits
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//
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// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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#ifndef STRFWD_H
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#define STRFWD_H
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// This includes does nothing but defining _LIBCPP_VERSION
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// if libc++ is used (rather than libstdc++) - we first
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// check if we have at least a c++03 standard before
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// including the file
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#if (__cplusplus > 19971L)
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#include <ciso646>
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#endif
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#ifdef USE_WCHAR_T
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// Prefer this if possible because GNU libstdc++ has usable
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// std::ctype<wchar_t> locale facets but not
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// std::ctype<boost::uint32_t>. gcc older than 3.4 is also missing
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// usable std::char_traits<boost::uint32_t>.
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namespace lyx { typedef wchar_t char_type; }
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#else
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#include <boost/cstdint.hpp>
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namespace lyx { typedef boost::uint32_t char_type; }
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#endif
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// Forward definitions do not work with libc++
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#ifdef _LIBCPP_VERSION
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#include <string>
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#else
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namespace std {
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template<typename Alloc> class allocator;
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template<typename Char> struct char_traits;
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template<> struct char_traits<char>;
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#ifdef USE_WCHAR_T
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template<> struct char_traits<wchar_t>;
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#endif
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template<typename Char, typename Traits, typename Alloc> class basic_string;
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typedef basic_string<char, char_traits<char>, allocator<char> > string;
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template<class Char, class Traits> class basic_istream;
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template<class Char, class Traits> class basic_ostream;
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template<class Char, class Traits, class Allocator> class basic_ostringstream;
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typedef basic_istream<char, char_traits<char> > istream;
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typedef basic_ostream<char, char_traits<char> > ostream;
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typedef basic_ostringstream<char, char_traits<char>, allocator<char> > ostringstream;
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} // namepace std
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#endif
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namespace lyx {
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/// String type for storing the main text in UCS4 encoding
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typedef std::basic_string<char_type, std::char_traits<char_type>,
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std::allocator<char_type> > docstring;
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/// Base class for UCS4 input streams
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typedef std::basic_istream<char_type, std::char_traits<char_type> > idocstream;
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/// Base class for UCS4 output streams
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typedef std::basic_ostream<char_type, std::char_traits<char_type> > odocstream;
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/// UCS4 output stringstream
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typedef std::basic_ostringstream<char_type, std::char_traits<char_type>, std::allocator<char_type> > odocstringstream;
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#if ! defined(USE_WCHAR_T)
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extern odocstream & operator<<(odocstream &, char);
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#endif
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// defined in lstrings.cpp
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docstring const & empty_docstring();
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std::string const & empty_string();
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// defined in docstring.cpp
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bool operator==(docstring const &, char const *);
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} // namespace lyx
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#endif
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