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< a name = "fusion.algorithm.query.metafunctions.none" ></ a >< a href = "none.html" title = "none" > none</ a ></ h5 ></ div ></ div ></ div >
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< a href = "none.html#fusion.algorithm.query.metafunctions.none.description" > Description</ a >
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A metafunction returning the result type of < a href = "../functions/none.html" title = "none" >< tt class = "computeroutput" >< span class = "identifier" > none</ span ></ tt ></ a > .
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< a name = "fusion.algorithm.query.metafunctions.none.synopsis" ></ a >< h6 >
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< a name = "id597798" ></ a >
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< a href = "none.html#fusion.algorithm.query.metafunctions.none.synopsis" > Synopsis</ a >
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< pre class = "programlisting" >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > Sequence</ span >< span class = "special" > ,</ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > F</ span >
< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > none</ span >
< span class = "special" > {</ span >
< span class = "keyword" > typedef</ span > < span class = "keyword" > bool</ span > < span class = "identifier" > type</ span >< span class = "special" > ;</ span >
< span class = "special" > };</ span >
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< a name = "id597918" ></ a >< p class = "title" >< b > Table </ b ></ p >
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< table class = "table" summary = "Parameters" >
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< p >
Parameter
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< th >
< p >
Requirement
</ p >
</ th >
< th >
< p >
Description
</ p >
</ th >
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< tt class = "computeroutput" >< span class = "identifier" > Sequence</ span ></ tt >
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</ td >
< td >
< p >
A model of < a href = "../../../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
Sequence</ a >
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< td >
< p >
Operation's argument
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< tr >
< td >
< p >
< tt class = "computeroutput" >< span class = "identifier" > F</ span ></ tt >
</ p >
</ td >
< td >
< p >
A model of unary < a href = "../../../functional/concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a >
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</ td >
< td >
< p >
Operation's argument
</ p >
</ td >
</ tr >
</ tbody >
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< a name = "fusion.algorithm.query.metafunctions.none.expression_semantics" ></ a >< h6 >
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< a name = "id598063" ></ a >
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< a href = "none.html#fusion.algorithm.query.metafunctions.none.expression_semantics" > Expression
Semantics</ a >
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< a href = "none.html" title = "none" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > none</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > Sequence</ span >< span class = "special" > ,</ span > < span class = "identifier" > F</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >
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< span class = "bold" >< b > Return type</ b ></ span > : < tt class = "computeroutput" >< span class = "keyword" > bool</ span ></ tt > .
</ p >
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< span class = "bold" >< b > Semantics</ b ></ span > : Returns the return type of
< a href = "../functions/none.html" title = "none" >< tt class = "computeroutput" >< span class = "identifier" > none</ span ></ tt ></ a >
given a sequence of type < tt class = "computeroutput" >< span class = "identifier" > Sequence</ span ></ tt >
and a unary < a href = "../../../functional/concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a > of type < tt class = "computeroutput" >< span class = "identifier" > F</ span ></ tt > .
The return type is always < tt class = "computeroutput" >< span class = "keyword" > bool</ span ></ tt > .
</ p >
< a name = "fusion.algorithm.query.metafunctions.none.complexity" ></ a >< h6 >
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< a href = "none.html#fusion.algorithm.query.metafunctions.none.complexity" > Complexity</ a >
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< p >
Constant.
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< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > fusion</ span >< span class = "special" > /</ span >< span class = "identifier" > algorithm</ span >< span class = "special" > /</ span >< span class = "identifier" > query</ span >< span class = "special" > /</ span >< span class = "identifier" > none</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > fusion</ span >< span class = "special" > /</ span >< span class = "identifier" > include</ span >< span class = "special" > /</ span >< span class = "identifier" > none</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
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