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