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- <?xml version="1.0"?>
- <concept name="EqualityComparable" category="Utility"><!--
- Based on concepts from the SGI Standard Template Library documentation:
- Copyright (c) 1996-1999
- Silicon Graphics Computer Systems, Inc.
- Copyright (c) 1994
- Hewlett-Packard Company
- --><!--
- Copyright 2000-2001 University of Notre Dame du Lac.
- Copyright 2001-2002 Indiana University.
- Some concepts based on versions from the MTL draft manual and Boost Graph
- and Property Map documentation:
- Copyright (c) Jeremy Siek, Lie-Quan Lee, and Andrew Lumsdaine 2000
- -->
- <param name="X" role="comparable-type"/>
- <models-sentence>The type <arg num="1"/> must be a model of
- <self/>.</models-sentence>
- <description><para>Equality Comparable types must have <code>==</code> and
- <code>!=</code> operators.</para></description>
- <notation variables="x y">
- <sample-value>
- <type name="X"/>
- </sample-value>
- </notation>
- <valid-expression name="Equality test">
- <equal-to>
- <sample-value><type name="X"/></sample-value>
- <sample-value><type name="X"/></sample-value>
- </equal-to>
- <return-type>
- <convertible-to testable="yes">
- <type name="bool"/>
- </convertible-to>
- </return-type>
- </valid-expression>
- <valid-expression name="Inequality test">
- <not-equal-to>
- <sample-value><type name="X"/></sample-value>
- <sample-value><type name="X"/></sample-value>
- </not-equal-to>
- <return-type>
- <convertible-to testable="yes">
- <type name="bool"/>
- </convertible-to>
- </return-type>
- </valid-expression>
- <example-model>
- <type name="int"/>
- </example-model>
- <example-model>
- <apply-template name="std::vector">
- <type name="int"/>
- </apply-template>
- </example-model>
- </concept>
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