feedc0de/boost_optional
1
0
Fork 0
forked from boostorg/optional
Code Pull Requests Activity

Adds forwarding make_optional helpers, resolves #30

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

21
include/boost/optional/optional.hpp
View File

@ -1276,6 +1276,25 @@ class optional<T&&>
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)
template<class T>
inline
@ -1292,6 +1311,8 @@ optional<T> make_optional ( bool cond, T const& 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.
// No-throw
template<class T>