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< div class = "section" title = "Forward Sequence" >
< div class = "titlepage" > < div > < div > < h4 class = "title" >
< a name = "fusion.sequence.concepts.forward_sequence" > < / a > < a class = "link" href = "forward_sequence.html" title = "Forward Sequence" > Forward
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Sequence< / a >
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< / h4 > < / div > < / div > < / div >
< a name = "fusion.sequence.concepts.forward_sequence.description" > < / a > < h6 >
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< a name = "id595828" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.description" > Description< / a >
< / h6 >
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< p >
A Forward Sequence is a Sequence whose elements are arranged in a definite
order. The ordering is guaranteed not to change from iteration to iteration.
The requirement of a definite ordering allows the definition of element-by-element
equality (if the container's element type is Equality Comparable) and of
lexicographical ordering (if the container's element type is LessThan Comparable).
< / p >
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< div class = "variablelist" title = "Notation" >
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< p class = "title" > < b > Notation< / b > < / p >
< dl >
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< dt > < span class = "term" > < code class = "computeroutput" > < span class = "identifier" > s< / span > < / code > < / span > < / dt >
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< dd > < p >
A Forward Sequence
< / p > < / dd >
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< dt > < span class = "term" > < code class = "computeroutput" > < span class = "identifier" > S< / span > < / code > < / span > < / dt >
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< dd > < p >
A Forward Sequence type
< / p > < / dd >
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< dt > < span class = "term" > < code class = "computeroutput" > < span class = "identifier" > o< / span > < / code > < / span > < / dt >
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< dd > < p >
An arbitrary object
< / p > < / dd >
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< dt > < span class = "term" > < code class = "computeroutput" > < span class = "identifier" > e< / span > < / code > < / span > < / dt >
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< dd > < p >
A Sequence element
< / p > < / dd >
< / dl >
< / div >
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< a name = "fusion.sequence.concepts.forward_sequence.valid_expressions" > < / a > < h6 >
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< a name = "id595926" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.valid_expressions" > Valid
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Expressions< / a >
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< / h6 >
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< p >
For any Forward Sequence the following expressions must be valid:
< / p >
< div class = "informaltable" > < table class = "table" >
< colgroup >
< col >
< col >
< col >
< col >
< / colgroup >
< thead > < tr >
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< th >
< p >
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Expression
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< / p >
< / th >
< th >
< p >
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Return type
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< / p >
< / th >
< th >
< p >
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Type Requirements
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< / p >
< / th >
< th >
< p >
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Runtime Complexity
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< / p >
< / th >
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< / tr > < / thead >
< tbody >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
< a class = "link" href = "../../iterator/concepts/forward_iterator.html" title = "Forward Iterator" > Forward
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Iterator< / a >
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< / p >
< / td >
< td >
< p >
< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
< a class = "link" href = "../../iterator/concepts/forward_iterator.html" title = "Forward Iterator" > Forward
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Iterator< / a >
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< / p >
< / td >
< td >
< p >
< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/size.html" title = "size" > < code class = "computeroutput" > < span class = "identifier" > size< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
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< a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
Integral Constant< / a > . Convertible to int.
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< / p >
< / td >
< td >
< p >
< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/empty.html" title = "empty" > < code class = "computeroutput" > < span class = "identifier" > empty< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
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< a href = "http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target = "_top" > MPL
Boolean Constant< / a > . Convertible to bool.
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< / p >
< / td >
< td >
< p >
< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/front.html" title = "front" > < code class = "computeroutput" > < span class = "identifier" > front< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
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Any type
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< / p >
< / td >
< td >
< p >
< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/front.html" title = "front" > < code class = "computeroutput" > < span class = "identifier" > front< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span >
< span class = "special" > =< / span > < span class = "identifier" > o< / span > < / code >
< / p >
< / td >
< td >
< p >
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Any type
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< / p >
< / td >
< td >
< p >
< code class = "computeroutput" > < span class = "identifier" > s< / span > < / code > is mutable and
< code class = "computeroutput" > < span class = "identifier" > e< / span > < span class = "special" > =< / span >
< span class = "identifier" > o< / span > < / code > , where < code class = "computeroutput" > < span class = "identifier" > e< / span > < / code > is the first element in the
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sequence, is a valid expression.
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< / p >
< / td >
< td >
< p >
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Constant
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< / p >
< / td >
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< / tr >
< / tbody >
< / table > < / div >
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< a name = "fusion.sequence.concepts.forward_sequence.result_type_expressions" > < / a > < h6 >
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< a name = "id597999" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.result_type_expressions" > Result
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Type Expressions< / a >
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< / h6 >
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< div class = "informaltable" > < table class = "table" >
< colgroup >
< col >
< col >
< / colgroup >
< thead > < tr >
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< th >
< p >
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Expression
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< / p >
< / th >
< th >
< p >
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Compile Time Complexity
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< / p >
< / th >
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< / tr > < / thead >
< tbody >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../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" > S< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
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Amortized constant time
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../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" > S< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
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Amortized constant time
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/metafunctions/size.html" title = "size" > < code class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > size< / span > < / code > < / a > < span class = "special" > < < / span > < span class = "identifier" > S< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
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Unspecified
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/metafunctions/empty.html" title = "empty" > < code class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > empty< / span > < / code > < / a > < span class = "special" > < < / span > < span class = "identifier" > S< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
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Constant time
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< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/metafunctions/front.html" title = "front" > < code class = "computeroutput" > < span class = "identifier" > result_of< / span > < span class = "special" > ::< / span > < span class = "identifier" > front< / span > < / code > < / a > < span class = "special" > < < / span > < span class = "identifier" > S< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < / code >
< / p >
< / td >
< td >
< p >
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Amortized constant time
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< / p >
< / td >
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< / tr >
< / tbody >
< / table > < / div >
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< a name = "fusion.sequence.concepts.forward_sequence.expression_semantics" > < / a > < h6 >
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< a name = "id598305" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.expression_semantics" > Expression
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Semantics< / a >
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< / h6 >
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< div class = "informaltable" > < table class = "table" >
< colgroup >
< col >
< col >
< / colgroup >
< thead > < tr >
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< th >
< p >
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Expression
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< / p >
< / th >
< th >
< p >
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Semantics
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< / p >
< / th >
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< / tr > < / thead >
< tbody >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
An iterator to the first element of the sequence; see < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > .
< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
A past-the-end iterator to the sequence; see < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > .
< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/size.html" title = "size" > < code class = "computeroutput" > < span class = "identifier" > size< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
The size of the sequence; see < a class = "link" href = "../intrinsic/functions/size.html" title = "size" > < code class = "computeroutput" > < span class = "identifier" > size< / span > < / code > < / a > .
< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/empty.html" title = "empty" > < code class = "computeroutput" > < span class = "identifier" > empty< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
A boolean Integral Constant < code class = "computeroutput" > < span class = "identifier" > c< / span > < / code >
such that < code class = "computeroutput" > < span class = "identifier" > c< / span > < span class = "special" > ::< / span > < span class = "identifier" > value< / span > < span class = "special" > ==< / span >
< span class = "keyword" > true< / span > < / code > if and only if the
sequence is empty; see < a class = "link" href = "../intrinsic/functions/empty.html" title = "empty" > < code class = "computeroutput" > < span class = "identifier" > empty< / span > < / code > < / a > .
< / p >
< / td >
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< / tr >
< tr >
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< td >
< p >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/front.html" title = "front" > < code class = "computeroutput" > < span class = "identifier" > front< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
< / p >
< / td >
< td >
< p >
The first element in the sequence; see < a class = "link" href = "../intrinsic/functions/front.html" title = "front" > < code class = "computeroutput" > < span class = "identifier" > front< / span > < / code > < / a > .
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< / td >
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< / tr >
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< a name = "fusion.sequence.concepts.forward_sequence.invariants" > < / a > < h6 >
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< a name = "id598634" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.invariants" > Invariants< / a >
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< p >
For any Forward Sequence s the following invariants always hold:
< / p >
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< div class = "itemizedlist" > < ul class = "itemizedlist" type = "disc" >
< li class = "listitem" >
< code class = "computeroutput" > < span class = "special" > [< / span > < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > ),< / span > < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > ))< / span > < / code > is always a valid range.
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< / li >
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< li class = "listitem" >
An < a class = "link" href = "../../algorithm.html" title = "Algorithm" > Algorithm< / a > that iterates through
the range < code class = "computeroutput" > < span class = "special" > [< / span > < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > ),< / span > < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > ))< / span > < / code > will pass through every element of
< code class = "computeroutput" > < span class = "identifier" > s< / span > < / code > exactly once.
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< / li >
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< li class = "listitem" >
< code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/begin.html" title = "begin" > < code class = "computeroutput" > < span class = "identifier" > begin< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > )< / span > < / code >
is identical to < code class = "computeroutput" > < a class = "link" href = "../intrinsic/functions/end.html" title = "end" > < code class = "computeroutput" > < span class = "identifier" > end< / span > < / code > < / a > < span class = "special" > (< / span > < span class = "identifier" > s< / span > < span class = "special" > ))< / span > < / code >
if and only if < code class = "computeroutput" > < span class = "identifier" > s< / span > < / code > is empty.
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< / li >
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< li class = "listitem" >
Two different iterations through < code class = "computeroutput" > < span class = "identifier" > s< / span > < / code >
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will access its elements in the same order.
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< / ul > < / div >
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< a name = "fusion.sequence.concepts.forward_sequence.models" > < / a > < h6 >
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< a name = "id598834" > < / a >
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< a class = "link" href = "forward_sequence.html#fusion.sequence.concepts.forward_sequence.models" > Models< / a >
< / h6 >
< div class = "itemizedlist" > < ul class = "itemizedlist" type = "disc" >
< li class = "listitem" > < a class = "link" href = "../../adapted/std__pair.html" title = "std::pair" > < code class = "computeroutput" > < span class = "identifier" > std< / span > < span class = "special" > ::< / span > < span class = "identifier" > pair< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../adapted/boost__array.html" title = "boost::array" > < code class = "computeroutput" > < span class = "identifier" > boost< / span > < span class = "special" > ::< / span > < span class = "identifier" > array< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../container/vector.html" title = "vector" > < code class = "computeroutput" > < span class = "identifier" > vector< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../container/cons.html" title = "cons" > < code class = "computeroutput" > < span class = "identifier" > cons< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../container/list.html" title = "list" > < code class = "computeroutput" > < span class = "identifier" > list< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../container/set.html" title = "set" > < code class = "computeroutput" > < span class = "identifier" > set< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../container/map.html" title = "map" > < code class = "computeroutput" > < span class = "identifier" > map< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/single_view.html" title = "single_view" > < code class = "computeroutput" > < span class = "identifier" > single_view< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/filter_view.html" title = "filter_view" > < code class = "computeroutput" > < span class = "identifier" > filter_view< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/iterator_range.html" title = "iterator_range" > < code class = "computeroutput" > < span class = "identifier" > iterator_range< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/joint_view.html" title = "joint_view" > < code class = "computeroutput" > < span class = "identifier" > joint_view< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/transform_view.html" title = "transform_view" > < code class = "computeroutput" > < span class = "identifier" > transform_view< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/reverse_view.html" title = "reverse_view" > < code class = "computeroutput" > < span class = "identifier" > reverse_view< / span > < / code > < / a > < / li >
< li class = "listitem" > < a class = "link" href = "../../view/zip_view.html" title = "zip_view" > < code class = "computeroutput" > < span class = "identifier" > zip_view< / span > < / code > < / a > < / li >
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< / ul > < / 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 > )
2007-11-14 10:17:09 +00:00
< / p >
< / div > < / td >
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< / tr > < / table >
< hr >
< div class = "spirit-nav" >
< a accesskey = "p" href = "../concepts.html" > < img src = "../../../../../../../doc/html/images/prev.png" alt = "Prev" > < / a > < a accesskey = "u" href = "../concepts.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 = "bidirectional_sequence.html" > < img src = "../../../../../../../doc/html/images/next.png" alt = "Next" > < / a >
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