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Each of the range concepts has a corresponding concept checking class in
the file < a href = "../../../../boost/range/concepts.hpp" target = "_top" > < code class = "computeroutput" > < span class = "special" > < < / span > < span class = "identifier" > boost< / span > < span class = "special" > /< / span > < span class = "identifier" > range< / span > < span class = "special" > /< / span > < span class = "identifier" > concepts< / span > < span class = "special" > .< / span > < span class = "identifier" > hpp< / span > < span class = "special" > > < / span > < / code > < / a > .
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These classes may be used in conjunction with the < a href = "../../../../../../libs/concept_check/index.html" target = "_top" > Boost
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Concept Check library< / a > to ensure that the type of a template parameter
is compatible with a range concept. If not, a meaningful compile time error
is generated. Checks are provided for the range concepts related to iterator
traversal categories. For example, the following line checks that the type
< code class = "computeroutput" > < span class = "identifier" > T< / span > < / code > models the < a class = "link" href = "forward_range.html" title = "Forward Range" > Forward
Range< / a > concept.
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< pre class = "programlisting" > < span class = "identifier" > BOOST_CONCEPT_ASSERT< / span > < span class = "special" > ((< / span > < span class = "identifier" > ForwardRangeConcept< / span > < span class = "special" > < < / span > < span class = "identifier" > T< / span > < span class = "special" > > < / span > < span class = "special" > ));< / span >
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An additional concept check is required for the value access property of
the range based on the range's iterator type. For example to check for a
ForwardReadableRange, the following code is required.
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< pre class = "programlisting" > < span class = "identifier" > BOOST_CONCEPT_ASSERT< / span > < span class = "special" > ((< / span > < span class = "identifier" > ForwardRangeConcept< / span > < span class = "special" > < < / span > < span class = "identifier" > T< / span > < span class = "special" > > < / span > < span class = "special" > ));< / span >
< span class = "identifier" > BOOST_CONCEPT_ASSERT< / span > < span class = "special" > ((< / span > < span class = "identifier" > ReadableIteratorConcept< / span > < span class = "special" > < < / span > < span class = "keyword" > typename< / span > < span class = "identifier" > range_iterator< / span > < span class = "special" > < < / span > < span class = "identifier" > T< / span > < span class = "special" > > ::< / span > < span class = "identifier" > type< / span > < span class = "special" > > < / span > < span class = "special" > ));< / span >
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The following range concept checking classes are provided.
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Class SinglePassRangeConcept checks for < a class = "link" href = "single_pass_range.html" title = "Single Pass Range" > Single
Pass Range< / a >
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Class ForwardRangeConcept checks for < a class = "link" href = "forward_range.html" title = "Forward Range" > Forward
Range< / a >
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Class BidirectionalRangeConcept checks for < a class = "link" href = "bidirectional_range.html" title = "Bidirectional Range" > Bidirectional
Range< / a >
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Class RandomAccessRangeConcept checks for < a class = "link" href = "random_access_range.html" title = "Random Access Range" > Random
Access Range< / a >
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< a name = "id2866069" > < / a >
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< a class = "link" href = "concept_checking.html#range.concepts.concept_checking.see_also" > See also< / a >
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< a class = "link" href = "../style_guide.html" title = "Terminology and style guidelines" > Range Terminology and style guidelines< / a >
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< a href = "../../../../../../libs/iterator/doc/iterator_concepts.html" target = "_top" > Iterator concepts< / a >
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< a href = "../../../../../../libs/concept_check/index.html" target = "_top" > Boost Concept Check library< / a >
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< td align = "right" > < div class = "copyright-footer" > Copyright © 2003 -2010 Thorsten Ottosen, Neil Groves< 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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