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workarounds_gcc-2_95.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\format\detail\workarounds_gcc-2_95.hpp
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// ---------------------------------------------------------------------------- // workarounds for gcc < 3.0. // ---------------------------------------------------------------------------- // 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 // ---------------------------------------------------------------------------- // There's a lot to do, the stdlib shipped with gcc prior to 3.x // was terribly non-conforming. // . defines macros switches // . supplies template classes basic_foo
where gcc only supplies foo. // i.e : // - basic_ios
from ios // - basic_ostream
from ostream // - basic_srteambuf
from streambuf // these can be used transparently. (it obviously does not work for wchar_t) // . specialise CompatAlloc and CompatTraits to wrap gcc-2.95's // string_char_traits and std::alloc #if BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION) // only for gcc-2.95's native stdlib #ifndef BOOST_FORMAT_WORKAROUNDS_GCC295_H #define BOOST_FORMAT_WORKAROUNDS_GCC295_H // SGI STL doesnt have
and others, so we need iostream. #include
#define BOOST_FORMAT_OSTREAM_DEFINED #include
#define BOOST_FORMAT_STREAMBUF_DEFINED #define BOOST_NO_TEMPLATE_STD_STREAM #ifndef BOOST_IO_STD # define BOOST_IO_STD std:: #endif // *** // gcc's simple classes turned into standard-like template classes : namespace std { // gcc has string_char_traits, it's incomplete. // we declare a std::char_traits, and specialize CompatTraits<..> on it // to do what is required template
class char_traits; // no definition here, we will just use it as a tag. template
class basic_streambuf; template
class basic_streambuf
: public streambuf { }; template
> class basic_ios; template
class basic_ios
: public ostream { public: basic_ios(streambuf * p) : ostream(p) {}; char fill() const { return ios::fill(); } // gcc returns wchar.. char fill(char c) { return ios::fill(c); } // gcc takes wchar.. char widen(char c) { return c; } char narrow(char c, char def) { return c; } basic_ios& copyfmt(const ios& right) { fill(right.fill()); flags(right.flags() ); exceptions(right.exceptions()); width(right.width()); precision(right.precision()); return *this; } }; typedef ios ios_base; template
class basic_ostream; template
class basic_ostream
: public basic_ios
{ public: basic_ostream(streambuf * p) : basic_ios
(p) {} }; } // namespace std namespace boost { namespace io { // ** CompatTraits gcc2.95 specialisations ---------------------------- template
class CompatTraits< ::std::string_char_traits
> : public ::std::string_char_traits
{ public: typedef CompatTraits compatible_type; typedef Ch char_type; typedef int int_type; typedef ::std::streampos pos_type; typedef ::std::streamoff off_type; static char_type to_char_type(const int_type& meta) { return static_cast
(meta); } static int_type to_int_type(const char_type& ch) { return static_cast
(static_cast
(ch) );} static bool eq_int_type(const int_type& left, const int_type& right) { return left == right; } static int_type eof() { return static_cast
(EOF); } static int_type not_eof(const int_type& meta) { return (meta == eof()) ? 0 : meta; } }; template
class CompatTraits< ::std::char_traits
> { public: typedef CompatTraits< ::std::string_char_traits
> compatible_type; }; // ** CompatAlloc gcc-2.95 specialisations --------------------------- template<> class CompatAlloc< ::std::alloc> { public: typedef ::std::allocator
compatible_type; }; } // N.S. io } // N.S. boost #endif // include guard #endif // if workaround
workarounds_gcc-2_95.hpp
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