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< div class = "titlepage" >< div >< div >< h5 class = "title" >
< a name = "fusion.sequence.operator.comparison.equal" ></ a >< a href = "equal.html" title = "equal" > equal</ a ></ h5 ></ div ></ div ></ div >
< a name = "fusion.sequence.operator.comparison.equal.description" ></ a >< h6 >
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< a name = "id521729" ></ a >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.description" > Description</ a >
</ h6 >
< p >
Compare two sequences for equality.
</ p >
< a name = "fusion.sequence.operator.comparison.equal.synopsis" ></ a >< h6 >
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< a name = "id521760" ></ a >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.synopsis" > Synopsis</ a >
</ h6 >
< pre class = "programlisting" >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > Seq1</ span >< span class = "special" > ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > Seq2</ span >< span class = "special" > > </ span >
< span class = "keyword" > bool</ span >
< span class = "keyword" > operator</ span >< span class = "special" > ==(</ span >< span class = "identifier" > Seq1</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > a</ span >< span class = "special" > ,</ span > < span class = "identifier" > Seq2</ span > < span class = "keyword" > const</ span >< span class = "special" > & </ span > < span class = "identifier" > b</ span >< span class = "special" > );</ span >
</ pre >
< a name = "fusion.sequence.operator.comparison.equal.parameters" ></ a >< h6 >
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< a name = "id521915" ></ a >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.parameters" > Parameters</ a >
</ h6 >
< div class = "informaltable" >< table class = "table" >
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< col >
< col >
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< 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" > a</ span >< span class = "special" > ,</ span >
< span class = "identifier" > b</ span ></ tt >
</ p >
</ td >
< td >
< p >
Instances of < a href = "../../../sequence.html" title = "Sequence" > Sequence</ a >
</ p >
</ td >
< td >
< p >
< a href = "../../../sequence.html" title = "Sequence" > Sequence</ a > (s) to compare
</ p >
</ td >
</ tr ></ tbody >
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< a name = "fusion.sequence.operator.comparison.equal.expression_semantics" ></ a >< h6 >
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< a name = "id522047" ></ a >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.expression_semantics" > Expression
Semantics</ a >
</ h6 >
< pre class = "programlisting" >
< span class = "identifier" > a</ span > < span class = "special" > ==</ span > < span class = "identifier" > b</ span >
</ pre >
< p >
< span class = "bold" >< b > Return type</ b ></ span > : < tt class = "computeroutput" >< span class = "keyword" > bool</ span ></ tt >
</ p >
< p >
< span class = "bold" >< b > Requirements</ b ></ span > :
</ p >
< p >
For each element, < tt class = "computeroutput" >< span class = "identifier" > e1</ span ></ tt > ,
in sequence < tt class = "computeroutput" >< span class = "identifier" > a</ span ></ tt > , and for
each element, < tt class = "computeroutput" >< span class = "identifier" > e2</ span ></ tt > , in
sequence < tt class = "computeroutput" >< span class = "identifier" > b</ span ></ tt > , < tt class = "computeroutput" >< span class = "identifier" > a</ span > < span class = "special" > ==</ span > < span class = "identifier" > b</ span ></ tt > is a valid expression returning a
type that is convertible to bool.
</ p >
< p >
An attempt to compare two Sequences of different lengths results in a
compile time error.
</ p >
< p >
< span class = "bold" >< b > Semantics</ b ></ span > :
</ p >
< p >
For each element, < tt class = "computeroutput" >< span class = "identifier" > e1</ span ></ tt > ,
in sequence < tt class = "computeroutput" >< span class = "identifier" > a</ span ></ tt > , and for
each element, < tt class = "computeroutput" >< span class = "identifier" > e2</ span ></ tt > , in
sequence < tt class = "computeroutput" >< span class = "identifier" > b</ span ></ tt > , < tt class = "computeroutput" >< span class = "identifier" > e1</ span > < span class = "special" > ==</ span > < span class = "identifier" > e2</ span ></ tt > returns true. For any 2 zero length
< span class = "underline" > _sequence</ span > _s, e and f, e == f returns
true.
</ p >
< a name = "fusion.sequence.operator.comparison.equal.header" ></ a >< h6 >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.header" > Header</ a >
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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" > sequence</ span >< span class = "special" > /</ span >< span class = "identifier" > comparison</ span >< span class = "special" > /</ span >< span class = "identifier" > equal_to</ 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" > equal_to</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
</ pre >
< a name = "fusion.sequence.operator.comparison.equal.example" ></ a >< h6 >
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< a name = "id522480" ></ a >
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< a href = "equal.html#fusion.sequence.operator.comparison.equal.example" > Example</ a >
</ h6 >
< pre class = "programlisting" >
< 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" > v1</ span >< span class = "special" > (</ span >< span class = "number" > 5</ span >< span class = "special" > ,</ span > < span class = "char" > 'a'</ span >< span class = "special" > );</ 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" > v2</ span >< span class = "special" > (</ span >< span class = "number" > 5</ span >< span class = "special" > ,</ span > < span class = "char" > 'a'</ span >< span class = "special" > );</ span >
< span class = "identifier" > assert</ span >< span class = "special" > (</ span >< span class = "identifier" > v1</ span > < span class = "special" > ==</ span > < span class = "identifier" > v2</ 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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