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Adds forwarding make_optional helpers, resolves #30

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This commit is contained in:
Daniel J. Hofmann
2017-05-14 16:31:00 +02:00
committed by Andrzej Krzemienski
parent e9f5641be3
commit c695be11b5
1 changed files with 21 additions and 0 deletions
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21
include/boost/optional/optional.hpp
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@ -1276,6 +1276,25 @@ class optional<T&&>
namespace boost { namespace boost {
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
template<class T>
inline
optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( T && v )
{
return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(boost::forward<T>(v));
}
// Returns optional<T>(cond,v)
template<class T>
inline
optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( bool cond, T && v )
{
return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(cond,boost::forward<T>(v));
}
#else
// Returns optional<T>(v) // Returns optional<T>(v)
template<class T> template<class T>
inline inline
@ -1292,6 +1311,8 @@ optional<T> make_optional ( bool cond, T const& v )
return optional<T>(cond,v); return optional<T>(cond,v);
} }
#endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
// Returns a reference to the value if this is initialized, otherwise, the behaviour is UNDEFINED. // Returns a reference to the value if this is initialized, otherwise, the behaviour is UNDEFINED.
// No-throw // No-throw
template<class T> template<class T>