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< h1 >< a class = "toc-backref" href = "./sequences.html#id1424" > Intrinsic Metafunctions</ a ></ h1 >
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< p id = "label-sequences-intrinsic-metafunctions" > The metafunctions that form the essential interface of sequence < a class = "reference internal" href = "./classes.html#label-sequences-classes" > classes</ a >
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documented in the corresponding < a class = "reference internal" href = "./concepts.html#label-sequences-concepts" > sequence concepts</ a > are known as
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< em > intrinsic sequence operations</ em > . They differ from generic
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< a class = "reference internal" href = "./algorithms.html" > sequence algorithms</ a > in that, in general, they need to be implemented
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from scratch for each new sequence class < a class = "footnote-reference" href = "#intrinsic" id = "id175" > [1]</ a > .</ p >
< p > It's worth noting that STL counterparts of these metafunctions are
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usually implemented as member functions.</ p >
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< tr >< td class = "label" >< a class = "fn-backref" href = "#id175" > [1]</ a ></ td >< td > In practice, many of intrinsic metafunctions offer a
default implementation that will work in majority of cases, given
that you've implemented the core functionality they rely on (such
as < a class = "reference internal" href = "./begin.html" > begin</ a > / < a class = "reference internal" href = "./end.html" > end</ a > ).</ td ></ tr >
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