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< html >
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< title > transform_view</ title >
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<<<<<< < .working
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< meta name = "generator" content = "DocBook XSL Stylesheets V1.65.1" >
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=======
< meta name = "generator" content = "DocBook XSL Stylesheets V1.75.1" >
>>>>>>> .merge-right.r57125
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< link rel = "home" href = "../../index.html" title = "Chapter >
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< div class = "section" lang = "en" >
< div class = "titlepage" >
< div >< div >< h3 class = "title" >
< a name = "fusion.view.transform_view" ></ a >< a href = "transform_view.html" title = "transform_view" > transform_view</ a >
</ h3 ></ div ></ div >
< div ></ div >
</ div >
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< p >
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The unary version of < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
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presents a view of its underlying sequence given a unary function object
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or function pointer. The binary version of < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
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presents a view of 2 underlying sequences, given a binary function object
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or function pointer. The < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
inherits the traversal characteristics (see < a href = "../sequence/concepts.html#fusion.sequence.concepts.traversal" > Sequence
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Traversal Concept</ a > ) of its underlying sequence or sequences.
</ p >
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<<<<<< < .working
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< a name = "fusion.view.transform_view.header" ></ a >< h4 >
< a name = "id524861" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.header" > Header</ a >
</ h4 >
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=======
< a name = "fusion.view.transform_view.header" ></ a >< h5 >
< a name = "id732614" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.header" > Header</ a >
</ h5 >
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< pre class = "programlisting" >< 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" > view</ span >< span class = "special" > /</ span >< span class = "identifier" > transform_view</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
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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" > include</ span >< span class = "special" > /</ span >< span class = "identifier" > transform_view</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
</ pre >
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<<<<<< < .working
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< a name = "fusion.view.transform_view.synopsis" ></ a >< h4 >
< a name = "id525017" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.synopsis" > Synopsis</ a >
</ h4 >
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=======
< a name = "fusion.view.transform_view.synopsis" ></ a >< h5 >
< a name = "id732722" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.synopsis" > Synopsis</ a >
</ h5 >
>>>>>>> .merge-right.r57125
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< p >
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< span class = "bold" >< b > Unary Version</ b ></ span >
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</ p >
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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" > F1</ span >< span class = "special" > > </ span >
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< span class = "keyword" > struct</ span > < span class = "identifier" > transform_view</ span >< span class = "special" > ;</ span >
</ pre >
< p >
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< span class = "bold" >< b > Binary Version</ b ></ span >
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</ p >
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< pre class = "programlisting" >< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > Sequence1</ span >< span class = "special" > ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > Sequence2</ span >< span class = "special" > ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > F2</ span >< span class = "special" > > </ span >
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< span class = "keyword" > struct</ span > < span class = "identifier" > transform_view</ span >< span class = "special" > ;</ span >
</ pre >
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<<<<<< < .working
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< a name = "fusion.view.transform_view.template_parameters" ></ a >< h4 >
< a name = "id525221" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.template_parameters" > Template parameters</ a >
</ h4 >
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=======
< a name = "fusion.view.transform_view.template_parameters" ></ a >< h5 >
< a name = "id732868" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.template_parameters" > Template parameters</ a >
</ h5 >
>>>>>>> .merge-right.r57125
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< div class = "informaltable" >< table class = "table" >
< colgroup >
< col >
< col >
< col >
</ colgroup >
< thead >< tr >
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< th >< p >
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Parameter
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</ p ></ th >
< th >< p >
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Description
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</ p ></ th >
< th >< p >
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Default
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</ p ></ th >
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</ tr ></ thead >
< tbody >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > Sequence</ span ></ tt >
</ p ></ td >
< td >< p >
A < a href = "../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
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Sequence</ a >
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</ p ></ td >
< td >< p >
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > Sequence1</ span ></ tt >
</ p ></ td >
< td >< p >
A < a href = "../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
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Sequence</ a >
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</ p ></ td >
< td >< p >
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > Sequence2</ span ></ tt >
</ p ></ td >
< td >< p >
A < a href = "../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
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Sequence</ a >
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</ p ></ td >
< td >< p >
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > F1</ span ></ tt >
</ p ></ td >
< td >< p >
A unary function object or function pointer. < tt class = "computeroutput" >< a href = "http://www.boost.org/libs/utility/utility.htm#result_of" target = "_top" >< tt class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > result_of</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > F1</ span >< span class = "special" > (</ span >< span class = "identifier" > E</ span >< span class = "special" > )> ::</ span >< span class = "identifier" > type</ span ></ tt > is the return type of an instance
of < tt class = "computeroutput" >< span class = "identifier" > F1</ span ></ tt > when called
with a value of each element type < tt class = "computeroutput" >< span class = "identifier" > E</ span ></ tt >
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in the input sequence.
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</ p ></ td >
< td >< p >
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > F2</ span ></ tt >
</ p ></ td >
< td >< p >
A binary function object or function pointer. < tt class = "computeroutput" >< a href = "http://www.boost.org/libs/utility/utility.htm#result_of" target = "_top" >< tt class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > result_of</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > F2</ span >< span class = "special" > (</ span >< span class = "identifier" > E1</ span >< span class = "special" > ,</ span > < span class = "identifier" > E2</ span >< span class = "special" > )> ::</ span >< span class = "identifier" > type</ span ></ tt > is the return type of an instance
of < tt class = "computeroutput" >< span class = "identifier" > F2</ span ></ tt > when called
with a value of each corresponding pair of element type < tt class = "computeroutput" >< span class = "identifier" > E1</ span ></ tt > and < tt class = "computeroutput" >< span class = "identifier" > E2</ span ></ tt >
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in the input sequences.
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</ p ></ td >
< td >< p >
</ p ></ td >
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</ tr >
</ tbody >
</ table ></ div >
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<<<<<< < .working
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< a name = "fusion.view.transform_view.model_of" ></ a >< h4 >
< a name = "id525686" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.model_of" > Model of</ a >
</ h4 >
< div class = "itemizedlist" >< ul type = "disc" >< li >
< a href = "../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward Sequence</ a > ,
< a href = "../sequence/concepts/bidirectional_sequence.html" title = "Bidirectional
Sequence" > Bidirectional
Sequence</ a > or < a href = "../sequence/concepts/random_access_sequence.html" title = "Random
Access Sequence" > Random
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=======
< a name = "fusion.view.transform_view.model_of" ></ a >< h5 >
< a name = "id733216" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.model_of" > Model of</ a >
</ h5 >
< div class = "itemizedlist" >< ul class = "itemizedlist" type = "disc" >< li class = "listitem" >
< a class = "link" href = "../sequence/concepts/forward_sequence.html" title = "Forward Sequence" > Forward Sequence</ a > ,
< a class = "link" href = "../sequence/concepts/bidirectional_sequence.html" title = "Bidirectional Sequence" > Bidirectional
Sequence</ a > or < a class = "link" href = "../sequence/concepts/random_access_sequence.html" title = "Random Access Sequence" > Random
>>>>>>> .merge-right.r57125
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Access Sequence</ a > depending on the traversal characteristics (see
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< a href = "../sequence/concepts.html#fusion.sequence.concepts.traversal" > Sequence Traversal Concept</ a > )
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of its underlying sequence.
</ li ></ ul ></ div >
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< div class = "variablelist" >
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< p class = "title" >< b > Notation</ b ></ p >
< dl >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > TV</ span ></ tt ></ span ></ dt >
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< dd >< p >
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A < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt > type
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > BTV</ span ></ tt ></ span ></ dt >
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< dd >< p >
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A binary < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
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type
</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > UTV</ span ></ tt ></ span ></ dt >
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< dd >< p >
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A unary < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
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type
</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > f1</ span ></ tt ></ span ></ dt >
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< dd >< p >
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An instance of < tt class = "computeroutput" >< span class = "identifier" > F1</ span ></ tt >
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > f2</ span ></ tt ></ span ></ dt >
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< dd >< p >
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An instance of < tt class = "computeroutput" >< span class = "identifier" > F2</ span ></ tt >
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > s</ span ></ tt ></ span ></ dt >
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< dd >< p >
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An instance of < tt class = "computeroutput" >< span class = "identifier" > Sequence</ span ></ tt >
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > s1</ span ></ tt ></ span ></ dt >
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< dd >< p >
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An instance of < tt class = "computeroutput" >< span class = "identifier" > Sequence1</ span ></ tt >
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > s2</ span ></ tt ></ span ></ dt >
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< dd >< p >
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An instance of < tt class = "computeroutput" >< span class = "identifier" > Sequence2</ span ></ tt >
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</ p ></ dd >
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< dt >< span class = "term" >< tt class = "computeroutput" >< span class = "identifier" > tv</ span ></ tt > ,
< tt class = "computeroutput" >< span class = "identifier" > tv2</ span ></ tt ></ span ></ dt >
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< dd >< p >
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Instances of < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
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</ p ></ dd >
</ dl >
</ div >
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<<<<<< < .working
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< a name = "fusion.view.transform_view.expression_semantics" ></ a >< h4 >
< a name = "id526088" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.expression_semantics" > Expression
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=======
< a name = "fusion.view.transform_view.expression_semantics" ></ a >< h5 >
< a name = "id733498" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.expression_semantics" > Expression
>>>>>>> .merge-right.r57125
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Semantics</ a >
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</ h4 >
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< p >
Semantics of an expression is defined only where it differs from, or is not
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defined in < a href = "../sequence/concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
Sequence</ a > , < a href = "../sequence/concepts/bidirectional_sequence.html" title = "Bidirectional
Sequence" > Bidirectional
Sequence</ a > or < a href = "../sequence/concepts/random_access_sequence.html" title = "Random
Access Sequence" > Random
Access Sequence</ a > depending on the traversal characteristics (see < a href = "../sequence/concepts.html#fusion.sequence.concepts.traversal" > Sequence Traversal Concept</ a > )
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of its underlying sequence or sequences.
</ p >
< div class = "informaltable" >< table class = "table" >
< colgroup >
< col >
< col >
</ colgroup >
< thead >< tr >
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< th >< p >
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Expression
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</ p ></ th >
< th >< p >
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Semantics
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</ p ></ th >
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</ tr ></ thead >
< tbody >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > UTV</ span >< span class = "special" > (</ span >< span class = "identifier" > s</ span >< span class = "special" > ,</ span > < span class = "identifier" > f1</ span >< span class = "special" > )</ span ></ tt >
</ p ></ td >
< td >< p >
Creates a unary < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
given sequence, < tt class = "computeroutput" >< span class = "identifier" > s</ span ></ tt >
and unary function object or function pointer, < tt class = "computeroutput" >< span class = "identifier" > f1</ span ></ tt > .
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > BTV</ span >< span class = "special" > (</ span >< span class = "identifier" > s1</ span >< span class = "special" > ,</ span > < span class = "identifier" > s2</ span >< span class = "special" > ,</ span > < span class = "identifier" > f2</ span >< span class = "special" > )</ span ></ tt >
</ p ></ td >
< td >< p >
Creates a binary < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
given sequences, < tt class = "computeroutput" >< span class = "identifier" > s1</ span ></ tt >
and < tt class = "computeroutput" >< span class = "identifier" > s2</ span ></ tt > and binary
function object or function pointer, < tt class = "computeroutput" >< span class = "identifier" > f2</ span ></ tt > .
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > TV</ span >< span class = "special" > (</ span >< span class = "identifier" > tv</ span >< span class = "special" > )</ span ></ tt >
</ p ></ td >
< td >< p >
Copy constructs a < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt >
from another < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt > ,
< tt class = "computeroutput" >< span class = "identifier" > tv</ span ></ tt > .
</ p ></ td >
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</ tr >
< tr >
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< td >< p >
< tt class = "computeroutput" >< span class = "identifier" > tv</ span > < span class = "special" > =</ span >
< span class = "identifier" > tv2</ span ></ tt >
</ p ></ td >
< td >< p >
Assigns to a < tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt > ,
< tt class = "computeroutput" >< span class = "identifier" > tv</ span ></ tt > , from another
< tt class = "computeroutput" >< span class = "identifier" > transform_view</ span ></ tt > ,
< tt class = "computeroutput" >< span class = "identifier" > tv2</ span ></ tt > .
</ p ></ td >
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</ tr >
</ tbody >
</ table ></ div >
2010-01-01 22:00:21 +00:00
<<<<<< < .working
2009-10-11 16:12:54 +00:00
< a name = "fusion.view.transform_view.example" ></ a >< h4 >
< a name = "id526566" ></ a >
< a href = "transform_view.html#fusion.view.transform_view.example" > Example</ a >
</ h4 >
2010-01-01 22:00:21 +00:00
=======
< a name = "fusion.view.transform_view.example" ></ a >< h5 >
< a name = "id733832" ></ a >
< a class = "link" href = "transform_view.html#fusion.view.transform_view.example" > Example</ a >
</ h5 >
>>>>>>> .merge-right.r57125
2009-09-14 07:47:53 +00:00
< pre class = "programlisting" >< span class = "keyword" > struct</ span > < span class = "identifier" > square</ span >
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< span class = "special" > {</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > Sig</ span >< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > result</ span >< span class = "special" > ;</ span >
< span class = "keyword" > template</ span >< span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > U</ span >< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > square</ span >< span class = "special" > (</ span >< span class = "identifier" > U</ span >< span class = "special" > )> </ span >
< span class = "special" > :</ span > < span class = "identifier" > remove_reference</ span >< span class = "special" > < </ span >< span class = "identifier" > U</ span >< span class = "special" > > </ span >
< span class = "special" > {};</ span >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span >
< span class = "identifier" > T</ span > < span class = "keyword" > operator</ span >< span class = "special" > ()(</ span >< span class = "identifier" > T</ span > < span class = "identifier" > x</ span >< span class = "special" > )</ span > < span class = "keyword" > const</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > x</ span > < span class = "special" > *</ span > < span class = "identifier" > x</ span >< span class = "special" > ;</ span >
< span class = "special" > }</ span >
< span class = "special" > };</ span >
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< span class = "keyword" > typedef</ span > < a href = "../container/vector.html" title = "vector" >< tt class = "computeroutput" >< span class = "identifier" > vector</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span > < span class = "keyword" > short</ span >< span class = "special" > ,</ span > < span class = "keyword" > double</ span >< span class = "special" > > </ span > < span class = "identifier" > vector_type</ span >< span class = "special" > ;</ span >
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< span class = "identifier" > vector_type</ span > < span class = "identifier" > vec</ span >< span class = "special" > (</ span >< span class = "number" > 2</ span >< span class = "special" > ,</ span > < span class = "number" > 5</ span >< span class = "special" > ,</ span > < span class = "number" > 3.3</ span >< span class = "special" > );</ span >
< span class = "identifier" > transform_view</ span >< span class = "special" > < </ span >< span class = "identifier" > vector_type</ span >< span class = "special" > ,</ span > < span class = "identifier" > square</ span >< span class = "special" > > </ span > < span class = "identifier" > transform</ span >< span class = "special" > (</ span >< span class = "identifier" > vec</ span >< span class = "special" > ,</ span > < span class = "identifier" > square</ span >< span class = "special" > ());</ span >
< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > cout</ span > < span class = "special" > << </ span > < span class = "identifier" > transform</ span > < span class = "special" > << </ span > < span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > endl</ span >< span class = "special" > ;</ span >
</ pre >
</ div >
< table xmlns:rev = "http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width = "100%" >< tr >
< td align = "left" ></ td >
< td align = "right" >< div class = "copyright-footer" > Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger< p >
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at < a href = "http://www.boost.org/LICENSE_1_0.txt" target = "_top" > http://www.boost.org/LICENSE_1_0.txt</ a > )
</ p >
</ div ></ td >
</ tr ></ table >
< hr >
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