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< html >
< head >
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< meta http-equiv = "Content-Type" content = "text/html; charset=US-ASCII" >
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< title > at< / title >
< link rel = "stylesheet" href = "../../../../../../../../doc/html/boostbook.css" type = "text/css" >
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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" >
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< link rel = "home" href = "../../../../index.html" title = "Chapter<65> 1.<2E> Fusion 2.0" >
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< link rel = "home" href = "../../../../index.html" title = "Chapter 1. Fusion 2.0" >
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< link rel = "up" href = "../metafunctions.html" title = "Metafunctions" >
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< link rel = "previous" href = "size.html" title = "size" >
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< link rel = "next" href = "at_c.html" title = "at_c" >
< / 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 >
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< td align = "center" > < a href = "../../../../../../../../index.html" > Home< / a > < / td >
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< td align = "center" > < a href = "../../../../../../../libraries.htm" > Libraries< / a > < / td >
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< td align = "center" > < a href = "http://www.boost.org/users/people.html" > People< / a > < / td >
< td align = "center" > < a href = "http://www.boost.org/users/faq.html" > FAQ< / a > < / td >
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< td align = "center" > < a href = "../../../../../../../../more/index.htm" > More< / a > < / td >
< / tr > < / table >
< hr >
< div class = "spirit-nav" >
< a accesskey = "p" href = "size.html" > < img src = "../../../../../../../../doc/html/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../metafunctions.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 = "at_c.html" > < img src = "../../../../../../../../doc/html/images/next.png" alt = "Next" > < / a >
< / div >
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< div class = "section" lang = "en" >
< div class = "titlepage" >
< div > < div > < h5 class = "title" >
< a name = "fusion.sequence.intrinsic.metafunctions.at" > < / a > < a href = "at.html" title = "at" > at< / a >
< / h5 > < / div > < / div >
< div > < / div >
< / div >
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< a name = "fusion.sequence.intrinsic.metafunctions.at.description" > < / a > < h6 >
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< a name = "id463892" > < / a >
< a href = "at.html#fusion.sequence.intrinsic.metafunctions.at.description" > Description< / a >
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< a name = "id715319" > < / a >
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>>>>>>> .merge-right.r58559
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< a class = "link" href = "at.html#fusion.sequence.intrinsic.metafunctions.at.description" > Description< / a >
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< / h6 >
< p >
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< < < < < < < .working
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Returns the result type of < a href = "../functions/at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > at< / span > < / tt > < / a >
< sup > [< a name = "id463929" href = "#ftn.id463929" > 6< / a > ]< / sup >
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Returns the result type of < a class = "link" href = "../functions/at.html" title = "at" > < code class = "computeroutput" > < span class = "identifier" > at< / span > < / code > < / a >
< sup > [< a name = "id676747" href = "#ftn.id676747" class = "footnote" > 6< / a > ]< / sup >
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.
< / p >
< a name = "fusion.sequence.intrinsic.metafunctions.at.synopsis" > < / a > < h6 >
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< a name = "id464047" > < / a >
< a href = "at.html#fusion.sequence.intrinsic.metafunctions.at.synopsis" > Synopsis< / a >
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=======
< a name = "id715410" > < / a >
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< a name = "id677672" > < / a >
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< a name = "id670026" > < / a >
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< a name = "id676816" > < / a >
>>>>>>> .merge-right.r58559
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< a class = "link" href = "at.html#fusion.sequence.intrinsic.metafunctions.at.synopsis" > Synopsis< / a >
>>>>>>> .merge-right.r57125
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< / h6 >
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< pre class = "programlisting" > < span class = "keyword" > template< / span > < span class = "special" > < < / span >
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< span class = "keyword" > typename< / span > < span class = "identifier" > Seq< / span > < span class = "special" > ,< / span >
< span class = "keyword" > typename< / span > < span class = "identifier" > N< / span > < span class = "special" > > < / span >
< span class = "keyword" > struct< / span > < span class = "identifier" > at< / span >
< span class = "special" > {< / span >
< span class = "keyword" > typedef< / span > < span class = "emphasis" > < em > unspecified< / em > < / span > < span class = "identifier" > type< / span > < span class = "special" > ;< / span >
< span class = "special" > };< / span >
< / pre >
< div class = "table" >
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< a name = "id464162" > < / a > < p class = "title" > < b > Table<EFBFBD> 1.25.<2E> Parameters< / b > < / p >
< table class = "table" summary = "Parameters" >
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< a name = "id715494" > < / a > < p class = "title" > < b > Table<EFBFBD> 1.25.<2E> Parameters< / b > < / p >
=======
< a name = "id677756" > < / a > < p class = "title" > < b > Table<EFBFBD> 1.29.<2E> Parameters< / b > < / p >
=======
< a name = "id670110" > < / a > < p class = "title" > < b > Table<EFBFBD> 1.29.<2E> Parameters< / b > < / p >
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< a name = "id691516" > < / a > < p class = "title" > < b > Table  1.29.  Parameters< / b > < / p >
=======
< a name = "id680177" > < / a > < p class = "title" > < b > Table  1.29.  Parameters< / b > < / p >
=======
< a name = "id676900" > < / a > < p class = "title" > < b > Table  1.29.  Parameters< / b > < / p >
>>>>>>> .merge-right.r58559
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< div class = "table-contents" > < table class = "table" summary = "Parameters" >
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< 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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Requirement
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< / p > < / th >
< th > < p >
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Description
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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" > Seq< / span > < / tt >
< / p > < / td >
< td > < p >
A model of < a href = "../../concepts/forward_sequence.html" title = "Forward
Sequence">Forward
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Sequence< / a >
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< / p > < / td >
< td > < p >
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Argument sequence
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< / p > < / td >
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< / tr >
< tr >
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< td > < p >
< tt class = "computeroutput" > < span class = "identifier" > N< / span > < / tt >
< / p > < / td >
< td > < p >
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An < a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
Integral Constant< / a >
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< / p > < / td >
< td > < p >
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Index of element
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< / p > < / td >
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< / tr >
< / tbody >
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< / table >
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< / div >
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< a name = "fusion.sequence.intrinsic.metafunctions.at.expression_semantics" > < / a > < h6 >
< a name = "id464305" > < / a >
< a href = "at.html#fusion.sequence.intrinsic.metafunctions.at.expression_semantics" > Expression
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< br class = "table-break" > < a name = "fusion.sequence.intrinsic.metafunctions.at.expression_semantics" > < / a > < h6 >
< a name = "id677019" > < / a >
< a class = "link" href = "at.html#fusion.sequence.intrinsic.metafunctions.at.expression_semantics" > Expression
>>>>>>> .merge-right.r57125
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Semantics< / a >
< / h6 >
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< pre class = "programlisting" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > at< / span > < span class = "special" > < < / span > < span class = "identifier" > Seq< / span > < span class = "special" > ,< / span > < span class = "identifier" > N< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span >
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< / pre >
< p >
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< span class = "bold" > < b > Return type< / b > < / span > : Any type.
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< / p >
< p >
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< span class = "bold" > < b > Semantics< / b > < / span > : Returns the result type of
using < a href = "../functions/at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > at< / span > < / tt > < / a > to access the < tt class = "computeroutput" > < span class = "identifier" > N< / span > < / tt > th element of < tt class = "computeroutput" > < span class = "identifier" > Seq< / span > < / tt > .
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< / p >
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< a name = "fusion.sequence.intrinsic.metafunctions.at.header" > < / a > < h6 >
< a name = "id677114" > < / a >
< a class = "link" href = "at.html#fusion.sequence.intrinsic.metafunctions.at.header" > Header< / a >
< / h6 >
< 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" > sequence< / span > < span class = "special" > /< / span > < span class = "identifier" > intrinsic< / span > < span class = "special" > /< / span > < span class = "identifier" > at< / 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" > at< / span > < span class = "special" > .< / span > < span class = "identifier" > hpp< / span > < span class = "special" > > < / span >
< / pre >
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< a name = "fusion.sequence.intrinsic.metafunctions.at.example" > < / a > < h6 >
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< a name = "id464452" > < / a >
< a href = "at.html#fusion.sequence.intrinsic.metafunctions.at.example" > Example< / a >
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< a name = "id715711" > < / a >
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>>>>>>> .merge-right.r58559
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< a class = "link" href = "at.html#fusion.sequence.intrinsic.metafunctions.at.example" > Example< / a >
>>>>>>> .merge-right.r57125
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< / h6 >
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< pre class = "programlisting" > < 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" > float< / span > < span class = "special" > ,< / span > < span class = "keyword" > char< / span > < span class = "special" > > < / span > < span class = "identifier" > vec< / span > < span class = "special" > ;< / span >
< span class = "identifier" > BOOST_MPL_ASSERT< / span > < span class = "special" > ((< / span > < span class = "identifier" > boost< / span > < span class = "special" > ::< / span > < span class = "identifier" > is_same< / span > < span class = "special" > < < / span > < a href = "at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > at< / span > < / tt > < / a > < span class = "special" > < < / span > < span class = "identifier" > vec< / span > < span class = "special" > ,< / span > < span class = "identifier" > boost< / span > < span class = "special" > ::< / span > < span class = "identifier" > mpl< / span > < span class = "special" > ::< / span > < span class = "identifier" > int_< / span > < span class = "special" > < < / span > < span class = "number" > 1< / span > < span class = "special" > > < / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < span class = "special" > ,< / span > < span class = "keyword" > float< / span > < span class = "special" > & > ));< / span >
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< / pre >
< div class = "footnotes" >
< br > < hr width = "100" align = "left" >
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< < < < < < < .working
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< div class = "footnote" > < p > < sup > [< a name = "ftn.id463929" href = "#id463929" > 6< / a > ] < / sup >
< a href = "at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > at< / span > < / tt > < / a > reflects the actual return
type of the function < a href = "../functions/at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > at< / span > < / tt > < / a > . < a href = "../../../sequence.html" title = "Sequence" > Sequence< / a > (s)
typically return references to its elements via the < a href = "../functions/at.html" title = "at" > < tt class = "computeroutput" > < span class = "identifier" > at< / span > < / tt > < / a > function. If you want
to get the actual element type, use < a href = "value_at.html" title = "value_at" > < tt class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > value_at< / span > < / tt > < / a >
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< div class = "footnote" > < p > < sup > [< a name = "ftn.id715340" href = "#id715340" class = "para" > 6< / a > ] < / sup >
=======
< div class = "footnote" > < p > < sup > [< a name = "ftn.id677602" href = "#id677602" class = "para" > 6< / a > ] < / sup >
=======
< div class = "footnote" > < p > < sup > [< a name = "ftn.id669956" href = "#id669956" class = "para" > 6< / a > ] < / sup >
=======
< div class = "footnote" > < p > < sup > [< a name = "ftn.id691362" href = "#id691362" class = "para" > 6< / a > ] < / sup >
=======
< div class = "footnote" > < p > < sup > [< a name = "ftn.id680024" href = "#id680024" class = "para" > 6< / a > ] < / sup >
=======
< div class = "footnote" > < p > < sup > [< a name = "ftn.id676747" href = "#id676747" class = "para" > 6< / a > ] < / sup >
>>>>>>> .merge-right.r58559
>>>>>>> .merge-right.r58549
>>>>>>> .merge-right.r58299
>>>>>>> .merge-right.r57337
>>>>>>> .merge-right.r57242
< a class = "link" href = "at.html" title = "at" > < code class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > at< / span > < / code > < / a > reflects the actual return
type of the function < a class = "link" href = "../functions/at.html" title = "at" > < code class = "computeroutput" > < span class = "identifier" > at< / span > < / code > < / a > . < a class = "link" href = "../../../sequence.html" title = "Sequence" > Sequence< / a > (s)
typically return references to its elements via the < a class = "link" href = "../functions/at.html" title = "at" > < code class = "computeroutput" > < span class = "identifier" > at< / span > < / code > < / a > function. If you want
to get the actual element type, use < a class = "link" href = "value_at.html" title = "value_at" > < code class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > value_at< / span > < / code > < / a >
>>>>>>> .merge-right.r57125
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< / p > < / div >
< / div >
< / div >
< table xmlns:rev = "http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width = "100%" > < tr >
< td align = "left" > < / td >
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< td align = "right" > < div class = "copyright-footer" > Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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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 = "size.html" > < img src = "../../../../../../../../doc/html/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../metafunctions.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 = "at_c.html" > < img src = "../../../../../../../../doc/html/images/next.png" alt = "Next" > < / a >
< / div >
< / body >
< / html >
