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< title > Logtalk built-in predicate: protocol_property/2< / title >
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< a href = "../../index.html" > contents< / a > > < a href = "../index.html" > reference manual< / a > > < a href = "../index.html#builtins" > built-in predicates< / a >
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< h2 > < code > protocol_property/2< / code > < / h2 >
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< h4 > Description< / h4 >
< blockquote >
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< pre > protocol_property(Protocol, Property)< / pre >
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Enumerates, by backtracking, the properties associated with the currently defined protocols.
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< h4 > Template and modes< / h4 >
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< pre > protocol_property(?protocol_identifier, ?protocol_property)< / pre >
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< h4 > Errors< / h4 >
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< dl >
< dt > Protocol is neither a variable nor a valid protocol identifier:< / dt >
< dd > < code > type_error(protocol_identifier, Protocol)< / code > < / dd >
< dt > Property is neither a variable nor a valid protocol property:< / dt >
< dd > < code > domain_error(protocol_property, Property)< / code > < / dd >
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< h4 > Examples< / h4 >
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< pre > | ?- protocol_property(listp, Property).< / pre >
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Copyright © < a href = "mailto:pmoura@logtalk.org" > Paulo Moura< / a > — < a href = "http://www.logtalk.org" > Logtalk.org< / a >
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