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59 lines
2.4 KiB
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59 lines
2.4 KiB
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<title>Logtalk predicate directive: alias/3</title>
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<div class="top-left">Logtalk reference manual</div>
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<div class="top-right">Predicate directive: alias/3</div>
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<div class="bottom-right"><span class="page"/></div>
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<div class="navtop"><a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#directives">directives</a></div>
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<h2 id="directives_alias3" class="codenp">alias/3</h2>
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<h4>Description</h4>
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<pre>alias(Entity, Predicate, Alias)
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alias(Entity, NonTerminal, Alias)</pre>
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<p>
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Declares predicate and grammar rule non-terminal aliases. A predicate (non-terminal) alias is an alternative name for a predicate (non-terminal) declared or defined in an implemented protocol, an imported category, an extended prototype, an instantiated class, or a specialized class. Predicate alias may be used to solve conflicts between imported or inherited predicates. This directive may be used in objects, protocols, and categories.
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</p>
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<h4>Template and modes</h4>
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<pre>alias(@entity_identifier, +predicate_indicator, +predicate_indicator)
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alias(@entity_identifier, +non_terminal_indicator, +non_terminal_indicator)</pre>
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<h4>Examples</h4>
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<pre>:- alias(list, member/2, list_member/2).
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:- alias(set, member/2, set_member/2).
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:- alias(words, singular//0, peculiar//0).</pre>
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<span>Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://logtalk.org">Logtalk.org</a></span><br/>
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<span>Last updated on: October 26, 2006</span>
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