Chris@16: // ----------------------------------------------------------------------------
Chris@16: //  compat_workarounds : general framework for non-conformance workarounds
Chris@16: // ----------------------------------------------------------------------------
Chris@16: 
Chris@16: //  Copyright Samuel Krempp 2003. Use, modification, and distribution are
Chris@16: //  subject to the Boost Software License, Version 1.0. (See accompanying
Chris@16: //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: // see http://www.boost.org/libs/format for library home page
Chris@16: 
Chris@16: // ----------------------------------------------------------------------------
Chris@16: 
Chris@16: 
Chris@16: //  this file defines  wrapper classes to hide non-conforming 
Chris@16: // std::char_traits<>  and std::allocator<> traits
Chris@16: //  and Includes : config_macros.hpp (defines config macros
Chris@16: //  and compiler-specific switches)
Chris@16: 
Chris@16: // Non-conformant Std-libs fail to supply conformant traits (std::char_traits,
Chris@16: //  std::allocator) and/or  the std::string doesnt support them.
Chris@16: // We don't want to have hundreds of #ifdef workarounds, so we define 
Chris@16: // replacement traits.
Chris@16: // But both char_traits and allocator traits are visible in the interface, 
Chris@16: // (inside the final string type),  thus we need to keep both 
Chris@16: // the replacement type (typedefed to 'compatible_type') for real use,
Chris@16: // and the original stdlib type (typedef to 'type_for_string') for interface
Chris@16: //  visibility. This is what Compat* classes do (as well as be transparent 
Chris@16: // when good allocator and char traits are present)
Chris@16: 
Chris@16: #ifndef BOOST_FORMAT_COMPAT_WORKAROUNDS_HPP
Chris@16: #define BOOST_FORMAT_COMPAT_WORKAROUNDS_HPP
Chris@16: 
Chris@16: namespace boost {
Chris@16:     namespace io {
Chris@16: 
Chris@16:         // gcc-2.95 char traits (non-conformantly named string_char_traits) 
Chris@16:         // lack several functions so we extend them in a replacement class.
Chris@16:         template<class Tr>
Chris@16:         class CompatTraits; 
Chris@16: 
Chris@16:         // std::allocator<Ch> in gcc-2.95 is ok, but basic_string only works 
Chris@16:         // with plain 'std::alloc' still, alt_stringbuf requires a functionnal
Chris@16:         // alloc template argument, so we need a replacement allocator
Chris@16:         template<class Alloc>
Chris@16:         class CompatAlloc; 
Chris@16:     } // N.S. io
Chris@16: }// N.S. boost
Chris@16: 
Chris@16: 
Chris@16: #include <boost/format/detail/config_macros.hpp>
Chris@16:    // sets-up macros and load compiler-specific workarounds headers.
Chris@16: 
Chris@16: #if !defined(BOOST_FORMAT_STREAMBUF_DEFINED)
Chris@16: // workarounds-gcc-2.95 might have defined own streambuf
Chris@16: #include <streambuf>
Chris@16: #endif
Chris@16: 
Chris@16: #if !defined(BOOST_FORMAT_OSTREAM_DEFINED)
Chris@16: // workarounds-gcc-2.95 might already have included <iostream>
Chris@16: #include <ostream>
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16:     namespace io {
Chris@16: 
Chris@16:         // **** CompatTraits general definitions : ----------------------------
Chris@16:         template<class Tr>
Chris@16:         class CompatTraits
Chris@16:         {        // general case : be transparent
Chris@16:         public:
Chris@16:             typedef Tr  compatible_type;
Chris@16:         };
Chris@16: 
Chris@16:         // **** CompatAlloc general definitions : -----------------------------
Chris@16:         template<class Alloc>
Chris@16:         class CompatAlloc
Chris@16:         {        // general case : be transparent
Chris@16:         public:
Chris@16:             typedef Alloc  compatible_type;
Chris@16:         };
Chris@16: 
Chris@16:     } //N.S. io
Chris@16: } // N.S. boost
Chris@16: #endif // include guard