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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 > equal_to</ 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" >
<<<<<< < .working
> >>>>>> .merge-right.r57125
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< link rel = "home" href = "../../../index.html" title = "Chapter >
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=======
< link rel = "home" href = "../../../index.html" title = "Chapter 1. Fusion 2.0" >
>>>>>>> .merge-right.r58299
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< link rel = "up" href = "../metafunctions.html" title = "Metafunctions" >
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< link rel = "previous" href = "prior.html" title = "prior" >
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< link rel = "next" href = "distance.html" title = "distance" >
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< 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 >
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< td align = "center" >< a href = "../../../../../../../more/index.htm" > More</ a ></ td >
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< div class = "spirit-nav" >
< a accesskey = "p" href = "prior.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 = "distance.html" >< img src = "../../../../../../../doc/html/images/next.png" alt = "Next" ></ a >
</ div >
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<<<<<< < .working
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< div class = "section" lang = "en" >
< div class = "titlepage" >
< div >< div >< h4 class = "title" >
< a name = "fusion.iterator.metafunctions.equal_to" ></ a >< a href = "equal_to.html" title = "equal_to" > equal_to</ a >
</ h4 ></ div ></ div >
< div ></ div >
</ div >
< a name = "fusion.iterator.metafunctions.equal_to.description" ></ a >< h5 >
< a name = "id437790" ></ a >
< a href = "equal_to.html#fusion.iterator.metafunctions.equal_to.description" > Description</ a >
</ h5 >
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=======
< div class = "section" title = "equal_to" >
< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "fusion.iterator.metafunctions.equal_to" ></ a >< a class = "link" href = "equal_to.html" title = "equal_to" > equal_to</ a >
</ h4 ></ div ></ div ></ div >
< a name = "fusion.iterator.metafunctions.equal_to.description" ></ a >< h6 >
< a name = "id645491" ></ a >
< a class = "link" href = "equal_to.html#fusion.iterator.metafunctions.equal_to.description" > Description</ a >
</ h6 >
>>>>>>> .merge-right.r57125
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< p >
Returns a true-valued < a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
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Integral Constant</ a > if < tt class = "computeroutput" >< span class = "identifier" > I</ span ></ tt >
and < tt class = "computeroutput" >< span class = "identifier" > J</ span ></ tt > are equal.
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</ p >
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<<<<<< < .working
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< a name = "fusion.iterator.metafunctions.equal_to.synopsis" ></ a >< h5 >
< a name = "id437850" ></ a >
< a href = "equal_to.html#fusion.iterator.metafunctions.equal_to.synopsis" > Synopsis</ a >
</ h5 >
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=======
< a name = "fusion.iterator.metafunctions.equal_to.synopsis" ></ a >< h6 >
< a name = "id645527" ></ a >
< a class = "link" href = "equal_to.html#fusion.iterator.metafunctions.equal_to.synopsis" > Synopsis</ a >
</ h6 >
>>>>>>> .merge-right.r57125
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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" > I</ span >< span class = "special" > ,</ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > J</ span >
< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > equal_to</ 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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<<<<<< < .working
<<<<<<< . working
<<<<<<< . working
<<<<<<< . working
<<<<<<< . working
<<<<<<< . working
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< a name = "id437965" ></ a >< p class = "title" >< b > Table </ b ></ p >
< table class = "table" summary = "Parameters" >
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=======
< a name = "id688990" ></ a >< p class = "title" >< b > Table </ b ></ p >
=======
< a name = "id645683" ></ a >< p class = "title" >< b > Table </ b ></ p >
=======
< a name = "id638037" ></ a >< p class = "title" >< b > Table </ b ></ p >
=======
< a name = "id661592" ></ a >< p class = "title" >< b > Table  1.16.  Parameters</ b ></ p >
=======
< a name = "id648889" ></ a >< p class = "title" >< b > Table  1.16.  Parameters</ b ></ p >
=======
< a name = "id645612" ></ a >< p class = "title" >< b > Table  1.16.  Parameters</ b ></ p >
>>>>>>> .merge-right.r58559
>>>>>>> .merge-right.r58549
>>>>>>> .merge-right.r58299
>>>>>>> .merge-right.r57337
>>>>>>> .merge-right.r57242
< div class = "table-contents" >< table class = "table" summary = "Parameters" >
>>>>>>> .merge-right.r57125
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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" > I</ span ></ tt > , < tt class = "computeroutput" >< span class = "identifier" > J</ span ></ tt >
</ p ></ td >
< td >< p >
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Any fusion iterators
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</ p ></ td >
< td >< p >
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Operation's arguments
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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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<<<<<< < .working
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< a name = "fusion.iterator.metafunctions.equal_to.expression_semantics" ></ a >< h5 >
< a name = "id438069" ></ a >
< a href = "equal_to.html#fusion.iterator.metafunctions.equal_to.expression_semantics" > Expression
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=======
< br class = "table-break" >< a name = "fusion.iterator.metafunctions.equal_to.expression_semantics" ></ a >< h6 >
< a name = "id645698" ></ a >
< a class = "link" href = "equal_to.html#fusion.iterator.metafunctions.equal_to.expression_semantics" > Expression
>>>>>>> .merge-right.r57125
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Semantics</ a >
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</ h5 >
< pre class = "programlisting" >< a href = "equal_to.html" title = "equal_to" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > equal_to</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > I</ span >< span class = "special" > ,</ span > < span class = "identifier" > J</ 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 > : A model of < a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
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Integral Constant</ a > .
</ p >
< p >
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< span class = "bold" >< b > Semantics</ b ></ span > : Returns < tt class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > mpl</ span >< span class = "special" > ::</ span >< span class = "identifier" > true_</ span ></ tt >
if < tt class = "computeroutput" >< span class = "identifier" > I</ span ></ tt > and < tt class = "computeroutput" >< span class = "identifier" > J</ span ></ tt > are iterators to the same position.
Returns < tt class = "computeroutput" >< span class = "identifier" > boost</ span >< span class = "special" > ::</ span >< span class = "identifier" > mpl</ span >< span class = "special" > ::</ span >< span class = "identifier" > false_</ span ></ tt > otherwise.
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</ p >
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<<<<<< < .working
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< a name = "fusion.iterator.metafunctions.equal_to.header" ></ a >< h5 >
< a name = "id438274" ></ a >
< a href = "equal_to.html#fusion.iterator.metafunctions.equal_to.header" > Header</ a >
</ h5 >
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=======
< a name = "fusion.iterator.metafunctions.equal_to.header" ></ a >< h6 >
< a name = "id645836" ></ a >
< a class = "link" href = "equal_to.html#fusion.iterator.metafunctions.equal_to.header" > Header</ a >
</ h6 >
>>>>>>> .merge-right.r57125
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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" > iterator</ span >< span class = "special" > /</ span >< span class = "identifier" > equal_to</ 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" > equal_to</ 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.iterator.metafunctions.equal_to.example" ></ a >< h5 >
< a name = "id438431" ></ a >
< a href = "equal_to.html#fusion.iterator.metafunctions.equal_to.example" > Example</ a >
</ h5 >
< 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" > double</ span >< span class = "special" > > </ span > < span class = "identifier" > vec</ span >< span class = "special" > ;</ span >
< span class = "keyword" > typedef</ span > < a href = "../../sequence/intrinsic/metafunctions/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" > vec</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > first</ span >< span class = "special" > ;</ span >
< span class = "keyword" > typedef</ span > < a href = "../../sequence/intrinsic/metafunctions/end.html" title = "end" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > end</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > vec</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > last</ span >< span class = "special" > ;</ span >
< span class = "identifier" > BOOST_MPL_ASSERT</ span >< span class = "special" > ((</ span >< a href = "equal_to.html" title = "equal_to" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > equal_to</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > first</ span >< span class = "special" > ,</ span > < span class = "identifier" > first</ span >< span class = "special" > > ));</ span >
< span class = "identifier" > BOOST_MPL_ASSERT_NOT</ span >< span class = "special" > ((</ span >< a href = "equal_to.html" title = "equal_to" >< tt class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > equal_to</ span ></ tt ></ a >< span class = "special" > < </ span >< span class = "identifier" > first</ span >< span class = "special" > ,</ span >< span class = "identifier" > last</ span >< span class = "special" > > ));</ span >
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=======
< a name = "fusion.iterator.metafunctions.equal_to.example" ></ a >< h6 >
< a name = "id645944" ></ a >
< a class = "link" href = "equal_to.html#fusion.iterator.metafunctions.equal_to.example" > Example</ a >
</ h6 >
< pre class = "programlisting" >< span class = "keyword" > typedef</ span > < a class = "link" href = "../../container/vector.html" title = "vector" >< code class = "computeroutput" >< span class = "identifier" > vector</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "keyword" > int</ span >< span class = "special" > ,</ span >< span class = "keyword" > double</ span >< span class = "special" > > </ span > < span class = "identifier" > vec</ span >< span class = "special" > ;</ span >
< span class = "keyword" > typedef</ span > < a class = "link" href = "../../sequence/intrinsic/metafunctions/begin.html" title = "begin" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > begin</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > vec</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > first</ span >< span class = "special" > ;</ span >
< span class = "keyword" > typedef</ span > < a class = "link" href = "../../sequence/intrinsic/metafunctions/end.html" title = "end" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > end</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > vec</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > last</ span >< span class = "special" > ;</ span >
< span class = "identifier" > BOOST_MPL_ASSERT</ span >< span class = "special" > ((</ span >< a class = "link" href = "equal_to.html" title = "equal_to" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > equal_to</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > first</ span >< span class = "special" > ,</ span > < span class = "identifier" > first</ span >< span class = "special" > > ));</ span >
< span class = "identifier" > BOOST_MPL_ASSERT_NOT</ span >< span class = "special" > ((</ span >< a class = "link" href = "equal_to.html" title = "equal_to" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > equal_to</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > first</ span >< span class = "special" > ,</ span >< span class = "identifier" > last</ span >< span class = "special" > > ));</ span >
>>>>>>> .merge-right.r57125
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</ pre >
</ 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 = "prior.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 = "distance.html" >< img src = "../../../../../../../doc/html/images/next.png" alt = "Next" ></ a >
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