2007-11-25 18:38:02 +00:00
< html >
< head >
< meta http-equiv = "Content-Type" content = "text/html; charset=ISO-8859-1" >
< title >
invoke_function_object< / title >
< link rel = "stylesheet" href = "../../../../../../../../doc/html/boostbook.css" type = "text/css" >
< meta name = "generator" content = "DocBook XSL Stylesheets V1.66.1" >
< link rel = "start" href = "../../../../index.html" title = "Chapter<65> 1.<2E> Fusion 2.0" >
< link rel = "up" href = "../functions.html" title = "Functions" >
< link rel = "prev" href = "invoke_proc.html" title = "
invoke_procedure">
< link rel = "next" href = "../metafunctions.html" title = "Metafunctions" >
< / head >
< body bgcolor = "white" text = "black" link = "#0000FF" vlink = "#840084" alink = "#0000FF" >
< table cellpadding = "2" width = "100%" > < tr >
< td valign = "top" > < img alt = "Boost C++ Libraries" width = "277" height = "86" src = "../../../../../../../../boost.png" > < / td >
< td align = "center" > < a href = "../../../../../../../../index.htm" > Home< / a > < / td >
< td align = "center" > < a href = "../../../../../../../libraries.htm" > Libraries< / a > < / td >
< td align = "center" > < a href = "../../../../../../../../people/people.htm" > People< / a > < / td >
< td align = "center" > < a href = "../../../../../../../../more/faq.htm" > FAQ< / a > < / td >
< td align = "center" > < a href = "../../../../../../../../more/index.htm" > More< / a > < / td >
< / tr > < / table >
< hr >
< div class = "spirit-nav" >
< a accesskey = "p" href = "invoke_proc.html" > < img src = "../../../../../../../../doc/html/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../functions.html" > < img src = "../../../../../../../../doc/html/images/up.png" alt = "Up" > < / a > < a accesskey = "h" href = "../../../../index.html" > < img src = "../../../../../../../../doc/html/images/home.png" alt = "Home" > < / a > < a accesskey = "n" href = "../metafunctions.html" > < img src = "../../../../../../../../doc/html/images/next.png" alt = "Next" > < / a >
< / div >
< div class = "section" lang = "en" >
< div class = "titlepage" > < div > < div > < h5 class = "title" >
< a name = "fusion.functional.invocation.functions.invoke_fobj" > < / a > < a href = "invoke_fobj.html" title = "
invoke_function_object">
invoke_function_object< / a > < / h5 > < / div > < / div > < / div >
< a name = "fusion.functional.invocation.functions.invoke_fobj.description" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id659620" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.description" > Description< / a >
< / h6 >
< p >
Calls a < a href = "../../concepts/poly.html" title = " Polymorphic Function
Object">Polymorphic Function
Object< / a > with the arguments from a < a href = "../../../sequence.html" title = "Sequence" > Sequence< / a > .
< / p >
< p >
The first template parameter can be specialized explicitly to avoid copying
and/or to control the const qualification of a function object.
< / p >
< a name = "fusion.functional.invocation.functions.invoke_fobj.synopsis" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id659675" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.synopsis" > Synopsis< / a >
< / h6 >
< pre class = "programlisting" >
< span class = "keyword" > template< / span > < span class = "special" > < < / span >
< span class = "keyword" > typename< / span > < span class = "identifier" > Function< / span > < span class = "special" > ,< / span >
< span class = "keyword" > class< / span > < span class = "identifier" > Sequence< / span >
< span class = "special" > > < / span >
< span class = "keyword" > typename< / span > < a href = "../metafunctions/invoke_fobj.html" title = "
invoke_function_object">< tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > invoke_function_object< / span > < / tt > < / a > < span class = "special" > < < / span > < span class = "identifier" > Function< / span > < span class = "special" > ,< / span > < span class = "identifier" > Sequence< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span >
< span class = "identifier" > invoke_function_object< / span > < span class = "special" > (< / span > < span class = "identifier" > Function< / span > < span class = "identifier" > f< / span > < span class = "special" > ,< / span > < span class = "identifier" > Sequence< / span > < span class = "special" > & < / span > < span class = "identifier" > s< / span > < span class = "special" > );< / span >
< span class = "keyword" > template< / span > < span class = "special" > < < / span >
< span class = "keyword" > typename< / span > < span class = "identifier" > Function< / span > < span class = "special" > ,< / span >
< span class = "keyword" > class< / span > < span class = "identifier" > Sequence< / span >
< span class = "special" > > < / span >
< span class = "keyword" > typename< / span > < a href = "../metafunctions/invoke_fobj.html" title = "
invoke_function_object">< tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > invoke_function_object< / span > < / tt > < / a > < span class = "special" > < < / span > < span class = "identifier" > Function< / span > < span class = "special" > ,< / span > < span class = "identifier" > Sequence< / span > < span class = "keyword" > const< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span >
< span class = "identifier" > invoke_function_object< / span > < span class = "special" > (< / span > < span class = "identifier" > Function< / span > < span class = "identifier" > f< / span > < span class = "special" > ,< / span > < span class = "identifier" > Sequence< / span > < span class = "keyword" > const< / span > < span class = "special" > & < / span > < span class = "identifier" > s< / span > < span class = "special" > );< / span >
< / pre >
< a name = "fusion.functional.invocation.functions.invoke_fobj.parameters" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id660056" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.parameters" > Parameters< / a >
< / h6 >
< div class = "informaltable" > < table class = "table" >
< colgroup >
< col >
< col >
< col >
< / colgroup >
< thead > < tr >
< th >
< p >
Parameter
< / p >
< / th >
< th >
< p >
Requirement
< / p >
< / th >
< th >
< p >
Description
< / p >
< / th >
< / tr > < / thead >
< tbody >
< tr >
< td >
< p >
< tt class = "computeroutput" > < span class = "identifier" > f< / span > < / tt >
< / p >
< / td >
< td >
< p >
Model of < a href = "../../concepts/poly.html" title = " Polymorphic Function
Object">Polymorphic
Function Object< / a >
< / p >
< / td >
< td >
< p >
The function object to call.
< / p >
< / td >
< / tr >
< tr >
< td >
< p >
< tt class = "computeroutput" > < span class = "identifier" > s< / span > < / tt >
< / p >
< / td >
< td >
< p >
Model of < a href = "../../../sequence/concepts/forward_sequence.html" title = "Forward
Sequence">Forward
Sequence< / a >
< / p >
< / td >
< td >
< p >
The arguments.
< / p >
< / td >
< / tr >
< / tbody >
< / table > < / div >
< a name = "fusion.functional.invocation.functions.invoke_fobj.expression_semantics" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id660216" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.expression_semantics" > Expression
Semantics< / a >
< / h6 >
< pre class = "programlisting" >
< span class = "identifier" > invoke_function_object< / span > < span class = "special" > (< / span > < span class = "identifier" > f< / span > < span class = "special" > ,< / span > < span class = "identifier" > s< / span > < span class = "special" > );< / span >
< / pre >
< p >
< span class = "bold" > < b > Return type< / b > < / span > : Return type of < tt class = "computeroutput" > < span class = "identifier" > f< / span > < / tt > when invoked with the elements in
< tt class = "computeroutput" > < span class = "identifier" > s< / span > < / tt > as its arguments.
< / p >
< p >
< span class = "bold" > < b > Semantics< / b > < / span > : Invokes < tt class = "computeroutput" > < span class = "identifier" > f< / span > < / tt >
with the elements in < tt class = "computeroutput" > < span class = "identifier" > s< / span > < / tt >
as arguments and returns the result of the call expression.
< / p >
< p >
/functional/invocation/invoke_function_object.hpp>
< / p >
< a name = "fusion.functional.invocation.functions.invoke_fobj.example" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id660359" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.example" > Example< / a >
< / h6 >
< pre class = "programlisting" >
< span class = "keyword" > struct< / span > < span class = "identifier" > sub< / span >
< 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" > class< / span > < span class = "identifier" > Self< / span > < span class = "special" > ,< / span > < span class = "keyword" > typename< / span > < span class = "identifier" > T< / span > < span class = "special" > > < / span >
< span class = "keyword" > struct< / span > < span class = "identifier" > result< / span > < span class = "special" > < < / span > < span class = "identifier" > Self< / span > < span class = "special" > (< / span > < span class = "identifier" > T< / span > < span class = "special" > ,< / span > < span class = "identifier" > T< / span > < span class = "special" > )< / span > < span class = "special" > > < / span >
< span class = "special" > {< / span > < span class = "keyword" > typedef< / span > < span class = "keyword" > typename< / span > < span class = "identifier" > remove_reference< / span > < span class = "special" > < < / span > < span class = "identifier" > T< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < span class = "identifier" > type< / 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" > lhs< / span > < span class = "special" > ,< / span > < span class = "identifier" > T< / span > < span class = "identifier" > rhs< / span > < span class = "special" > )< / span > < span class = "keyword" > const< / span >
< span class = "special" > {< / span >
< span class = "keyword" > return< / span > < span class = "identifier" > lhs< / span > < span class = "special" > -< / span > < span class = "identifier" > rhs< / span > < span class = "special" > ;< / span >
< span class = "special" > }< / span >
< span class = "special" > };< / span >
< span class = "keyword" > void< / span > < span class = "identifier" > try_it< / span > < span class = "special" > ()< / span >
< span class = "special" > {< / span >
< span class = "identifier" > sub< / span > < span class = "identifier" > f< / span > < span class = "special" > ;< / span >
< span class = "identifier" > assert< / span > < span class = "special" > (< / span > < span class = "identifier" > f< / span > < span class = "special" > (< / span > < span class = "number" > 2< / span > < span class = "special" > ,< / span > < span class = "number" > 1< / span > < span class = "special" > )< / span > < span class = "special" > ==< / span > < span class = "identifier" > invoke_function_object< / span > < span class = "special" > (< / span > < span class = "identifier" > f< / span > < span class = "special" > ,< / span > < a href = "../../../container/generation/functions/make_vector.html" title = "make_vector" > < tt class = "computeroutput" > < span class = "identifier" > make_vector< / span > < / tt > < / a > < span class = "special" > (< / span > < span class = "number" > 2< / span > < span class = "special" > ,< / span > < span class = "number" > 1< / span > < span class = "special" > )));< / span >
< span class = "special" > }< / span >
< / pre >
< a name = "fusion.functional.invocation.functions.invoke_fobj.see_also" > < / a > < h6 >
2007-12-21 03:13:31 +00:00
< a name = "id660909" > < / a >
2007-11-25 18:38:02 +00:00
< a href = "invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.see_also" > See
also< / a >
< / h6 >
< div class = "itemizedlist" > < ul type = "disc" >
< li > < a href = "invoke.html" title = "invoke" > < tt class = "computeroutput" > < span class = "identifier" > invoke< / span > < / tt > < / a > < / li >
< li > < a href = "invoke_proc.html" title = "
invoke_procedure">< tt class = "computeroutput" > < span class = "identifier" > invoke_procedure< / span > < / tt > < / a > < / li >
< li > < a href = "../metafunctions/invoke_fobj.html" title = "
invoke_function_object">< tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > invoke_function_object< / span > < / tt > < / a > < / li >
< li > < a href = "../../adapters/fused_function_object.html" title = "fused_function_object" > < tt class = "computeroutput" > < span class = "identifier" > fused_function_object< / span > < / tt > < / a > < / li >
< / ul > < / div >
< / 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 <20> 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 >
< div class = "spirit-nav" >
< a accesskey = "p" href = "invoke_proc.html" > < img src = "../../../../../../../../doc/html/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../functions.html" > < img src = "../../../../../../../../doc/html/images/up.png" alt = "Up" > < / a > < a accesskey = "h" href = "../../../../index.html" > < img src = "../../../../../../../../doc/html/images/home.png" alt = "Home" > < / a > < a accesskey = "n" href = "../metafunctions.html" > < img src = "../../../../../../../../doc/html/images/next.png" alt = "Next" > < / a >
< / div >
< / body >
< / html >
