2014-06-06 23:24:43 +02:00
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< div class = "toc" >< dl class = "toc" >
< dt >< span class = "section" >< a href = "reference.html#boost_optional.reference.synopsis" > Synopsis</ a ></ span ></ dt >
< dt >< span class = "section" >< a href = "../boost_optional/reference/detailed_semantics.html" > Detailed
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< a name = "boost_optional.reference.synopsis" ></ a >< a class = "link" href = "reference.html#boost_optional.reference.synopsis" title = "Synopsis" > Synopsis</ a >
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< pre class = "programlisting" >< code class = "computeroutput" >< span class = "comment" > // In Header: < </ span ></ code >< a href = "../../../../../boost/optional/optional.hpp" target = "_top" > boost/optional/optional.hpp</ a >< span class = "comment" > > </ span >
< span class = "keyword" > namespace</ span > < span class = "identifier" > boost</ span > < span class = "special" > {</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span >
< span class = "keyword" > class</ span > < span class = "identifier" > optional</ span >
< span class = "special" > {</ span >
< span class = "keyword" > public</ span > < span class = "special" > :</ span >
< span class = "comment" > // (If T is of reference type, the parameters and results by reference are by value)</ span >
< span class = "identifier" > optional</ span > < span class = "special" > ()</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > none_t</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_none_t" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span >< span class = "special" > && </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_move_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "comment" > // [new in 1.34]</ span >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "keyword" > bool</ span > < span class = "identifier" > condition</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_bool_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > && </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span >< span class = "special" > (</ span >< span class = "emphasis" >< em > see below</ em ></ span >< span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_move_constructor_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > explicit</ span > < span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_other_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > explicit</ span > < span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > >&& </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_move_constructor_other_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > InPlaceFactory</ span >< span class = "special" > > </ span > < span class = "keyword" > explicit</ span > < span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > InPlaceFactory</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_factory" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > TypedInPlaceFactory</ span >< span class = "special" > > </ span > < span class = "keyword" > explicit</ span > < span class = "identifier" > optional</ span > < span class = "special" > (</ span > < span class = "identifier" > TypedInPlaceFactory</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_constructor_factory" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > none_t</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_none_t" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span >< span class = "special" > && </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_move_equal_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > && </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span >< span class = "special" > (</ span >< span class = "emphasis" >< em > see below</ em ></ span >< span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_move_equal_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_other_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > >&& </ span > < span class = "identifier" > rhs</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_move_equal_other_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span >< span class = "special" > ...</ span > < span class = "identifier" > Args</ span >< span class = "special" > > </ span > < span class = "keyword" > void</ span > < span class = "identifier" > emplace</ span > < span class = "special" > (</ span > < span class = "identifier" > Args</ span >< span class = "special" > ...&& </ span > < span class = "identifier" > args</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_emplace" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > InPlaceFactory</ span >< span class = "special" > > </ span > < span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > InPlaceFactory</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_factory" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > TypedInPlaceFactory</ span >< span class = "special" > > </ span > < span class = "identifier" > optional</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > =</ span > < span class = "special" > (</ span > < span class = "identifier" > TypedInPlaceFactory</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_equal_factory" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > get</ span >< span class = "special" > ()</ span > < span class = "keyword" > const</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span >< span class = "special" > & </ span > < span class = "identifier" > get</ span >< span class = "special" > ()</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > *</ span > < span class = "keyword" > operator</ span > < span class = "special" > -> ()</ span > < span class = "keyword" > const</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_arrow" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span >< span class = "special" > *</ span > < span class = "keyword" > operator</ span > < span class = "special" > -> ()</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_arrow" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > *()</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span >< span class = "special" > & </ span > < span class = "keyword" > operator</ span > < span class = "special" > *()</ span > < span class = "special" > & ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-18 15:01:52 +02:00
< span class = "identifier" > T</ span > < span class = "keyword" > operator</ span > < span class = "special" > *()</ span > < span class = "special" > && ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk_move" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-06 23:24:43 +02:00
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > value</ span >< span class = "special" > ()</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span >< span class = "special" > & </ span > < span class = "identifier" > value</ span >< span class = "special" > ()</ span > < span class = "special" > & </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-18 15:01:52 +02:00
< span class = "identifier" > T</ span > < span class = "identifier" > value</ span >< span class = "special" > ()</ span > < span class = "special" > && </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value_move" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-06 23:24:43 +02:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "identifier" > T</ span > < span class = "identifier" > value_or</ span >< span class = "special" > (</ span > < span class = "identifier" > U</ span > < span class = "special" > && </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value_or" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-16 14:23:34 +02:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span > < span class = "identifier" > T</ span > < span class = "identifier" > value_or</ span >< span class = "special" > (</ span > < span class = "identifier" > U</ span > < span class = "special" > && </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > && </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value_or_move" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-18 15:01:52 +02:00
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "identifier" > T</ span > < span class = "identifier" > value_or_eval</ span >< span class = "special" > (</ span > < span class = "identifier" > F</ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value_or_call" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > F</ span >< span class = "special" > > </ span > < span class = "identifier" > T</ span > < span class = "identifier" > value_or_eval</ span >< span class = "special" > (</ span > < span class = "identifier" > F</ span > < span class = "identifier" > f</ span > < span class = "special" > )</ span > < span class = "special" > && </ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_value_or_call_move" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-06 23:24:43 +02:00
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > *</ span > < span class = "identifier" > get_ptr</ span >< span class = "special" > ()</ span > < span class = "keyword" > const</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_ptr" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "identifier" > T</ span >< span class = "special" > *</ span > < span class = "identifier" > get_ptr</ span >< span class = "special" > ()</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_ptr" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-14 00:46:24 +02:00
< span class = "keyword" > explicit</ span > < span class = "keyword" > operator</ span > < span class = "keyword" > bool</ span >< span class = "special" > ()</ span > < span class = "keyword" > const</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_bool" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
2014-06-06 23:24:43 +02:00
< span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span >< span class = "special" > !()</ span > < span class = "keyword" > const</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_operator_not" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "comment" > // deprecated methods</ span >
< span class = "comment" > // (deprecated)</ span >
< span class = "keyword" > void</ span > < span class = "identifier" > reset</ span >< span class = "special" > ()</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_reset" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "comment" > // (deprecated)</ span >
< span class = "keyword" > void</ span > < span class = "identifier" > reset</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_reset_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "comment" > // (deprecated)</ span >
< span class = "keyword" > bool</ span > < span class = "identifier" > is_initialized</ span >< span class = "special" > ()</ span > < span class = "keyword" > const</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_is_initialized" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "comment" > // (deprecated)</ span >
< span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > get_value_or</ span >< span class = "special" > (</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "keyword" > default</ span > < span class = "special" > )</ span > < span class = "keyword" > const</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_value_or_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "special" > };</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > ==</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_equal_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > !=</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_not_equal_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > < </ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_less_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > > </ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_greater_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > < =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_less_or_equal_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > > =</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_greater_or_equal_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > ==</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > none_t</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_equal_optional_none" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > bool</ span > < span class = "keyword" > operator</ span > < span class = "special" > !=</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > none_t</ span > < span class = "special" > )</ span > < span class = "keyword" > noexcept</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_operator_compare_not_equal_optional_none" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "identifier" > make_optional</ span > < span class = "special" > (</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_make_optional_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "identifier" > make_optional</ span > < span class = "special" > (</ span > < span class = "keyword" > bool</ span > < span class = "identifier" > condition</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > v</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_make_optional_bool_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > get_optional_value_or</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > opt</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "keyword" > default</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_value_or_value" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > get</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span >< span class = "special" > & </ span > < span class = "identifier" > get</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "special" > & </ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > *</ span > < span class = "identifier" > get</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > *</ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span >< span class = "special" > *</ span > < span class = "identifier" > get</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > *</ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span >< span class = "special" > *</ span > < span class = "identifier" > get_pointer</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_ptr" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "identifier" > T</ span >< span class = "special" > *</ span > < span class = "identifier" > get_pointer</ span > < span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "special" > & </ span > < span class = "identifier" > opt</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_optional_get_ptr" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "keyword" > inline</ span > < span class = "keyword" > void</ span > < span class = "identifier" > swap</ span >< span class = "special" > (</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >& </ span > < span class = "identifier" > x</ span >< span class = "special" > ,</ span > < span class = "identifier" > optional</ span >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > >& </ span > < span class = "identifier" > y</ span > < span class = "special" > )</ span > < span class = "special" > ;</ span > < a class = "link" href = "../boost_optional/reference/detailed_semantics.html#reference_swap_optional_optional" >< span class = "inlinemediaobject" >< img src = "../images/callouts/R.png" alt = "R" ></ span ></ a >
< span class = "special" > }</ span > < span class = "comment" > // namespace boost</ span >
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< td align = "right" >< div class = "copyright-footer" > Copyright © 2003-2007 Fernando Luis Cacciola Carballal< br > Copyright © 2014 Andrzej Krzemień ski< p >
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