Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the develop branch, built from commit 8c076c3913.

boost/flyweight/flyweight_fwd.hpp

/* Copyright 2006-2015 Joaquin M Lopez Munoz.
 * Distributed under 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/flyweight for library home page.
 */

#ifndef BOOST_FLYWEIGHT_FLYWEIGHT_FWD_HPP
#define BOOST_FLYWEIGHT_FLYWEIGHT_FWD_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/detail/templated_streams.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/parameter/parameters.hpp>
#include <boost/preprocessor/punctuation/comma.hpp>
#include <iosfwd>

#if !defined(BOOST_FLYWEIGHT_DISABLE_HASH_SUPPORT)
#include <boost/functional/hash_fwd.hpp>
#include <cstddef>
#endif

namespace boost{
  
namespace flyweights{

template<
  typename T,
  typename Arg1=parameter::void_,
  typename Arg2=parameter::void_,
  typename Arg3=parameter::void_,
  typename Arg4=parameter::void_,
  typename Arg5=parameter::void_
>
class flyweight;

#define BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(n)            \
typename Arg##n##1,typename Arg##n##2,typename Arg##n##3, \
typename Arg##n##4,typename Arg##n##5
#define BOOST_FLYWEIGHT_TEMPL_ARGS(n) \
Arg##n##1,Arg##n##2,Arg##n##3,Arg##n##4,Arg##n##5

template<
  typename T1,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1),
  typename T2,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2)
>
bool operator==(
  const flyweight<T1,BOOST_FLYWEIGHT_TEMPL_ARGS(1)>& x,
  const flyweight<T2,BOOST_FLYWEIGHT_TEMPL_ARGS(2)>& y);

template<
  typename T1,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1),
  typename T2,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2)
>
bool operator<(
  const flyweight<T1,BOOST_FLYWEIGHT_TEMPL_ARGS(1)>& x,
  const flyweight<T2,BOOST_FLYWEIGHT_TEMPL_ARGS(2)>& y);

#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
template<
  typename T1,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1),
  typename T2
>
bool operator==(
  const flyweight<T1,BOOST_FLYWEIGHT_TEMPL_ARGS(1)>& x,const T2& y);

template<
  typename T1,
  typename T2,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2)
>
bool operator==(
  const T1& x,const flyweight<T2,BOOST_FLYWEIGHT_TEMPL_ARGS(2)>& y);

template<
  typename T1,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1),
  typename T2
>
bool operator<(
  const flyweight<T1,BOOST_FLYWEIGHT_TEMPL_ARGS(1)>& x,const T2& y);

template<
  typename T1,
  typename T2,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2)
>
bool operator<(
  const T1& x,const flyweight<T2,BOOST_FLYWEIGHT_TEMPL_ARGS(2)>& y);
#endif /* !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) */

#define BOOST_FLYWEIGHT_COMPLETE_COMP_OPS_DECL(t,a1,a2)                       \
template<t>                                                                   \
inline bool operator!=(const a1& x,const a2& y);                              \
                                                                              \
template<t>                                                                   \
inline bool operator>(const a1& x,const a2& y);                               \
                                                                              \
template<t>                                                                   \
inline bool operator>=(const a1& x,const a2& y);                              \
                                                                              \
template<t>                                                                   \
inline bool operator<=(const a1& x,const a2& y);                              \

BOOST_FLYWEIGHT_COMPLETE_COMP_OPS_DECL(
  typename T1 BOOST_PP_COMMA()
  BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1) BOOST_PP_COMMA()
  typename T2 BOOST_PP_COMMA()
  BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2),
  flyweight<
    T1 BOOST_PP_COMMA() BOOST_FLYWEIGHT_TEMPL_ARGS(1)
  >,
  flyweight<
    T2 BOOST_PP_COMMA() BOOST_FLYWEIGHT_TEMPL_ARGS(2)
  >)

#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
BOOST_FLYWEIGHT_COMPLETE_COMP_OPS_DECL(
  typename T1 BOOST_PP_COMMA()
  BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(1) BOOST_PP_COMMA()
  typename T2,
  flyweight<
    T1 BOOST_PP_COMMA() BOOST_FLYWEIGHT_TEMPL_ARGS(1)
  >,
  T2)

BOOST_FLYWEIGHT_COMPLETE_COMP_OPS_DECL(
  typename T1 BOOST_PP_COMMA()
  typename T2 BOOST_PP_COMMA()
  BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(2),
  T1,
  flyweight<
    T2 BOOST_PP_COMMA() BOOST_FLYWEIGHT_TEMPL_ARGS(2)
  >)
#endif /* !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) */
  
template<typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)>
inline void swap(
  flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& x,
  flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& y);

template<
  BOOST_TEMPLATED_STREAM_ARGS(ElemType,Traits)
  BOOST_TEMPLATED_STREAM_COMMA
  typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)
>
inline BOOST_TEMPLATED_STREAM(ostream,ElemType,Traits)& operator<<(
  BOOST_TEMPLATED_STREAM(ostream,ElemType,Traits)& out,
  const flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& x);

template<
  BOOST_TEMPLATED_STREAM_ARGS(ElemType,Traits)
  BOOST_TEMPLATED_STREAM_COMMA
  typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)
>
inline BOOST_TEMPLATED_STREAM(istream,ElemType,Traits)& operator>>(
  BOOST_TEMPLATED_STREAM(istream,ElemType,Traits)& in,
  flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& x);

} /* namespace flyweights */

using flyweights::flyweight;

} /* namespace boost */

#if !defined(BOOST_FLYWEIGHT_DISABLE_HASH_SUPPORT)
#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

#if BOOST_WORKAROUND(_CPPLIB_VER,==520)
/* Dinkumware 5.20 defines std::hash as class rather than struct */
#define BOOST_FLYWEIGHT_STD_HASH_STRUCT_KEYWORD class
#else
#define BOOST_FLYWEIGHT_STD_HASH_STRUCT_KEYWORD struct
#endif

#if !defined(_LIBCPP_VERSION)
namespace std{
template <class T> BOOST_FLYWEIGHT_STD_HASH_STRUCT_KEYWORD hash;
}
#else 
/* As discussed in http://lists.boost.org/Archives/boost/2011/02/177218.php */
#include <functional>
#endif

namespace std{

template<typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)>
BOOST_FLYWEIGHT_STD_HASH_STRUCT_KEYWORD
hash<boost::flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)> >;

} /* namespace std */
#endif /* !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL) */

namespace boost{
#if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
namespace flyweights{
#endif

template<typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)>
inline std::size_t hash_value(
  const flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& x);

#if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
} /* namespace flyweights */
#endif
} /* namespace boost */
#endif /* !defined(BOOST_FLYWEIGHT_DISABLE_HASH_SUPPORT) */

#undef BOOST_FLYWEIGHT_COMPLETE_COMP_OPS_DECL
#undef BOOST_FLYWEIGHT_TEMPL_ARGS
#undef BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS

#endif