diff options
Diffstat (limited to 'boost/flyweight/flyweight.hpp')
-rw-r--r-- | boost/flyweight/flyweight.hpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/boost/flyweight/flyweight.hpp b/boost/flyweight/flyweight.hpp index fcc867c852..1fb2009fcf 100644 --- a/boost/flyweight/flyweight.hpp +++ b/boost/flyweight/flyweight.hpp @@ -47,6 +47,7 @@ #if BOOST_WORKAROUND(BOOST_MSVC,BOOST_TESTED_AT(1400)) #pragma warning(push) +#pragma warning(disable:4520) /* multiple default ctors */ #pragma warning(disable:4521) /* multiple copy ctors */ #endif @@ -436,6 +437,54 @@ BOOST_TEMPLATED_STREAM(istream,ElemType,Traits)& operator>>( } /* namespace boost */ +#if !defined(BOOST_FLYWEIGHT_DISABLE_HASH_SUPPORT) + +/* hash support */ + +#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL) +namespace std{ + +template<typename T,BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS(_)> +struct hash<boost::flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)> > +{ + typedef std::size_t result_type; + typedef boost::flyweight< + T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)> argument_type; + + result_type operator()(const argument_type& x)const + { + typedef typename argument_type::value_type value_type; + + std::hash<const value_type*> h; + return h(&x.get()); + } +}; + +} /* 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(_)> +std::size_t hash_value(const flyweight<T,BOOST_FLYWEIGHT_TEMPL_ARGS(_)>& x) +{ + typedef typename flyweight< + T,BOOST_FLYWEIGHT_TEMPL_ARGS(_) + >::value_type value_type; + + boost::hash<const value_type*> h; + return h(&x.get()); +} + +#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 #undef BOOST_FLYWEIGHT_TEMPL_ARGS #undef BOOST_FLYWEIGHT_TYPENAME_TEMPL_ARGS |