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< html >
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< title > Iterator Facade< / title >
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< link rel = "up" href = "../extension.html" title = "Extension" >
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< td align = "center" > < a href = "../../../../../../index.html" > Home< / a > < / td >
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< a accesskey = "p" href = "sequence_facade.html" > < img src = "../../../../../../doc/src/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../extension.html" > < img src = "../../../../../../doc/src/images/up.png" alt = "Up" > < / a > < a accesskey = "h" href = "../../index.html" > < img src = "../../../../../../doc/src/images/home.png" alt = "Home" > < / a > < a accesskey = "n" href = "../functional.html" > < img src = "../../../../../../doc/src/images/next.png" alt = "Next" > < / a >
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< div class = "section" >
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< div class = "titlepage" > < div > < div > < h3 class = "title" >
< a name = "fusion.extension.iterator_facade" > < / a > < a class = "link" href = "iterator_facade.html" title = "Iterator Facade" > Iterator Facade< / a >
< / h3 > < / div > < / div > < / div >
< a name = "fusion.extension.iterator_facade.description" > < / a > < h5 >
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< a name = "id1029911" > < / a >
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< a class = "link" href = "iterator_facade.html#fusion.extension.iterator_facade.description" > Description< / a >
< / h5 >
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< p >
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The < a class = "link" href = "iterator_facade.html" title = "Iterator Facade" > < code class = "computeroutput" > < span class = "identifier" > iterator_facade< / span > < / code > < / a >
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template provides an intrusive mechanism for producing a conforming Fusion
iterator.
< / p >
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< a name = "fusion.extension.iterator_facade.synopsis" > < / a > < h5 >
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< a name = "id1029938" > < / a >
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< a class = "link" href = "iterator_facade.html#fusion.extension.iterator_facade.synopsis" > Synopsis< / a >
< / h5 >
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< pre class = "programlisting" > < span class = "keyword" > template< / span > < span class = "special" > < < / span > < span class = "keyword" > typename< / span > < span class = "identifier" > Derived< / span > < span class = "special" > ,< / span > < span class = "keyword" > typename< / span > < span class = "identifier" > TravesalTag< / span > < span class = "special" > > < / span >
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< span class = "keyword" > struct< / span > < span class = "identifier" > iterator_facade< / span > < span class = "special" > ;< / span >
< / pre >
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< a name = "fusion.extension.iterator_facade.usage" > < / a > < h5 >
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< a name = "id1030001" > < / a >
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< a class = "link" href = "iterator_facade.html#fusion.extension.iterator_facade.usage" > Usage< / a >
< / h5 >
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< p >
The user of iterator_facade derives his iterator type from a specialization
of iterator_facade and passes the derived iterator type as the first template
parameter. The second template parameter should be the traversal category
of the iterator being implemented.
< / p >
< p >
The user must the implement the key expressions required by their iterator
type.
< / p >
< div class = "table" >
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< a name = "id1030018" > < / a > < p class = "title" > < b > Table  1.103.  Parameters< / b > < / p >
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< div class = "table-contents" > < table class = "table" summary = "Parameters" >
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< colgroup >
< col >
< col >
< / colgroup >
< thead > < tr >
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< th >
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< p >
Name
< / p >
< / th >
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< th >
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< p >
Description
< / p >
< / th >
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< / tr > < / thead >
< tbody >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < / code > , < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code > , < code class = "computeroutput" > < span class = "identifier" > It1< / span > < / code > ,
< code class = "computeroutput" > < span class = "identifier" > It2< / span > < / code >
< / p >
< / td >
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< td >
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< p >
A type derived from < a class = "link" href = "iterator_facade.html" title = "Iterator Facade" > < code class = "computeroutput" > < span class = "identifier" > iterator_facade< / span > < / code > < / a >
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > N< / span > < / code >
< / p >
< / td >
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< td >
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< p >
An < a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
Integral Constant< / a >
< / p >
< / td >
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< / tr >
< / tbody >
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< / table > < / div >
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< / div >
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< br class = "table-break" > < div class = "table" >
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< a name = "id1030143" > < / a > < p class = "title" > < b > Table  1.104.  Key Expressions< / b > < / p >
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< div class = "table-contents" > < table class = "table" summary = "Key Expressions" >
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< colgroup >
< col >
< col >
< col >
< / colgroup >
< thead > < tr >
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< th >
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< p >
Expression
< / p >
< / th >
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< th >
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< p >
Result
< / p >
< / th >
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< th >
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< p >
Default
< / p >
< / th >
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< / tr > < / thead >
< tbody >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > value_of< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The element stored at iterator position < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > deref< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The type returned when dereferencing an iterator of type < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > deref< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
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< td >
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< p >
Dereferences iterator < code class = "computeroutput" > < span class = "identifier" > it< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > next< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The type of the next element from < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > next< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The next iterator after < code class = "computeroutput" > < span class = "identifier" > it< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > prior< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The type of the next element from < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > prior< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The next iterator after < code class = "computeroutput" > < span class = "identifier" > it< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > advance< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > ,< / span > < span class = "identifier" > N< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
The type of an iterator advanced < code class = "computeroutput" > < span class = "identifier" > N< / span > < / code >
elements from < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
< td >
< p >
Implemented in terms of < code class = "computeroutput" > < span class = "identifier" > next< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > prior< / span > < / code >
< / p >
< / td >
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< / tr >
< tr >
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< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > advance< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > ,< / span > < span class = "identifier" > N< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
An iterator advanced < code class = "computeroutput" > < span class = "identifier" > N< / span > < / code >
elements from < code class = "computeroutput" > < span class = "identifier" > it< / span > < / code >
< / p >
< / td >
< td >
< p >
Implemented in terms of < code class = "computeroutput" > < span class = "identifier" > next< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > prior< / span > < / code >
< / p >
< / td >
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< / tr >
< tr >
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< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > distance< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span > < span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
The distance between iterators of type < code class = "computeroutput" > < span class = "identifier" > It1< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > It2< / span > < / code > as an
< a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
Integral Constant< / a >
< / p >
< / td >
< td >
< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > distance< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span > < span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it1< / span > < span class = "special" > ,< / span > < span class = "identifier" > it2< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
The distance between iterator < code class = "computeroutput" > < span class = "identifier" > it1< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > it2< / span > < / code >
< / p >
< / td >
< td >
< p >
None
< / p >
< / td >
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< / tr >
< tr >
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< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > equal_to< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span > < span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
The distance between iterators of type < code class = "computeroutput" > < span class = "identifier" > It1< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > It2< / span > < / code >
< / p >
< / td >
< td >
< p >
< code class = "computeroutput" > < span class = "identifier" > boost< / span > < span class = "special" > ::< / span > < span class = "identifier" > same_type< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span >
< span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
2007-11-06 12:13:52 +00:00
< / tr >
< tr >
2009-09-25 00:21:53 +00:00
< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > equal_to< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span > < span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it1< / span > < span class = "special" > ,< / span > < span class = "identifier" > it2< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
The distance between iterators < code class = "computeroutput" > < span class = "identifier" > it1< / span > < / code >
and < code class = "computeroutput" > < span class = "identifier" > it2< / span > < / code >
< / p >
< / td >
< td >
< p >
< code class = "computeroutput" > < span class = "identifier" > boost< / span > < span class = "special" > ::< / span > < span class = "identifier" > same_type< / span > < span class = "special" > < < / span > < span class = "identifier" > It1< / span > < span class = "special" > ,< / span >
< span class = "identifier" > It2< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < span class = "special" > ()< / span > < / code >
< / p >
< / td >
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< / tr >
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< tr >
< td >
2010-04-10 18:55:44 +00:00
< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > key_of< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
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< td >
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< p >
The key type associated with the element from < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
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< td >
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< p >
None
< / p >
< / td >
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< / tr >
< tr >
< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > value_of_data< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
The type of the data property associated with the element from
< code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
< td >
< p >
None
< / p >
< / td >
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< / tr >
< tr >
< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > deref_data< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
The type that will be returned by dereferencing the data property
of the element from < code class = "computeroutput" > < span class = "identifier" > It< / span > < / code >
< / p >
< / td >
< td >
< p >
None
< / p >
< / td >
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< / tr >
< tr >
< td >
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< p >
< code class = "computeroutput" > < span class = "identifier" > iterator< / span > < span class = "special" > ::< / span > < span class = "keyword" > template< / span > < span class = "identifier" > deref_data< / span > < span class = "special" > < < / span > < span class = "identifier" > It< / span > < span class = "special" > > ::< / span > < span class = "identifier" > call< / span > < span class = "special" > (< / span > < span class = "identifier" > it< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
Deferences the data property associated with the element referenced
by < code class = "computeroutput" > < span class = "identifier" > it< / span > < / code >
< / p >
< / td >
< td >
< p >
None
< / p >
< / td >
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< / tr >
2007-11-06 12:13:52 +00:00
< / tbody >
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< / table > < / div >
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< / div >
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< br class = "table-break" > < a name = "fusion.extension.iterator_facade.header" > < / a > < h5 >
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< a name = "id1031615" > < / a >
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< a class = "link" href = "iterator_facade.html#fusion.extension.iterator_facade.header" > Header< / a >
< / h5 >
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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" > iterator_facade< / 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" > iterator_facade< / span > < span class = "special" > .< / span > < span class = "identifier" > hpp< / span > < span class = "special" > > < / span >
< / pre >
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< a name = "fusion.extension.iterator_facade.example" > < / a > < h5 >
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< a name = "id1031723" > < / a >
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< a class = "link" href = "iterator_facade.html#fusion.extension.iterator_facade.example" > Example< / a >
< / h5 >
2007-11-07 02:12:28 +00:00
< p >
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A full working example using < a class = "link" href = "iterator_facade.html" title = "Iterator Facade" > < code class = "computeroutput" > < span class = "identifier" > iterator_facade< / span > < / code > < / a > is provided in triple.cpp
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in the extension examples.
< / p >
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< / 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 > )
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< / p >
< / div > < / td >
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< / tr > < / table >
< hr >
< div class = "spirit-nav" >
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< a accesskey = "p" href = "sequence_facade.html" > < img src = "../../../../../../doc/src/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../extension.html" > < img src = "../../../../../../doc/src/images/up.png" alt = "Up" > < / a > < a accesskey = "h" href = "../../index.html" > < img src = "../../../../../../doc/src/images/home.png" alt = "Home" > < / a > < a accesskey = "n" href = "../functional.html" > < img src = "../../../../../../doc/src/images/next.png" alt = "Next" > < / a >
2007-11-06 12:13:52 +00:00
< / div >
< / body >
< / html >
