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Add expected::operator>> as an alias for .then

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Peter Dimov
2017-06-03 00:12:01 +03:00
parent 241f41121e
commit 8765ee1983
1 changed files with 12 additions and 0 deletions
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12
include/boost/variant2/expected.hpp
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@@ -409,6 +409,18 @@ public:
return unexpected(); return unexpected();
} }
} }
template<class F> then_result<F, T const&> operator>>( F && f ) const
{
if( has_value() )
{
return std::forward<F>(f)( **this );
}
else
{
return unexpected();
}
}
}; };
template<class T, class... E> inline constexpr bool operator==( expected<T, E...> const & x1, expected<T, E...> const & x2 ) template<class T, class... E> inline constexpr bool operator==( expected<T, E...> const & x1, expected<T, E...> const & x2 )