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< a name = "fusion.sequence.intrinsic.metafunctions.front" ></ a >< a href = "front.html" title = "front" > front</ a ></ h5 ></ div ></ div ></ div >
< a name = "fusion.sequence.intrinsic.metafunctions.front.description" ></ a >< h6 >
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< a name = "id510745" ></ a >
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< a href = "front.html#fusion.sequence.intrinsic.metafunctions.front.description" > Description</ a >
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Returns the result type of < a href = "../functions/front.html" title = "front" >< tt class = "computeroutput" >< span class = "identifier" > front</ span ></ tt ></ a > .
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< a name = "fusion.sequence.intrinsic.metafunctions.front.synopsis" ></ a >< h6 >
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< a name = "id510794" ></ a >
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< a href = "front.html#fusion.sequence.intrinsic.metafunctions.front.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" > Seq</ span >< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > front</ 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 >
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< a name = "id510893" ></ a >< p class = "title" >< b > Table </ b ></ p >
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< table class = "table" summary = "Parameters" >
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< col >
< col >
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< th >
< p >
Parameter
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</ th >
< th >
< p >
Requirement
</ p >
</ th >
< th >
< p >
Description
</ p >
</ th >
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< tbody >< tr >
< td >
< p >
< tt class = "computeroutput" >< span class = "identifier" > Seq</ span ></ tt >
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< td >
< p >
A model of < a href = "../../concepts/forward_sequence.html" title = "Forward
Sequence" > Forward
Sequence</ a >
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</ td >
< td >
< p >
Argument sequence
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< a name = "fusion.sequence.intrinsic.metafunctions.front.expression_semantics" ></ a >< h6 >
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< a name = "id510995" ></ a >
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< a href = "front.html#fusion.sequence.intrinsic.metafunctions.front.expression_semantics" > Expression
Semantics</ a >
</ h6 >
< pre class = "programlisting" >
< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > front</ span >< span class = "special" > < </ span >< span class = "identifier" > Seq</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >
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< span class = "bold" >< b > Return type</ b ></ span > : Any type
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< p >
< span class = "bold" >< b > Semantics</ b ></ span > : The type returned by dereferencing
an iterator to the first element in < tt class = "computeroutput" >< span class = "identifier" > Seq</ span ></ tt > .
Equivalent to < tt class = "computeroutput" >< a href = "../../../iterator/metafunctions/deref.html" title = "deref" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > deref</ span ></ tt ></ a >< span class = "special" > < </ span >< a href = "begin.html" title = "begin" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > begin</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > Seq</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span ></ tt > .
</ p >
< p >
/sequence/intrinsic/front.hpp>
</ p >
< a name = "fusion.sequence.intrinsic.metafunctions.front.example" ></ a >< h6 >
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< a name = "id511200" ></ a >
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< a href = "front.html#fusion.sequence.intrinsic.metafunctions.front.example" > Example</ a >
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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" > 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 = "front.html" title = "front" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > front</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > vec</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span >< span class = "special" > &> ));</ span >
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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 > )
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