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< title > Logtalk built-in predicate: create_category/4< / 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 > create_category/4< / code > < / h2 >
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< h4 > Description< / h4 >
< blockquote >
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< pre > create_category(Identifier, Relations, Directives, Clauses)< / pre >
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< p >
Creates a new, dynamic, category.
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< h4 > Template and modes< / h4 >
< blockquote >
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< pre > create_category(+category_identifier, +list, +list, +list)< / pre >
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< / blockquote >
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< h4 > Errors< / h4 >
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< blockquote >
< dl >
< dt > Identifier is a variable:< / dt >
< dd > < code > instantiation_error< / code > < / dd >
< dt > Identifier is not a valid category identifier:< / dt >
< dd > < code > type_error(category_identifier, Identifier)< / code > < / dd >
< dt > Identifier is already in use:< / dt >
< dd > < code > permission_error(replace, category, Identifier)< / code > < / dd >
< dd > < code > permission_error(replace, object, Identifier)< / code > < / dd >
< dd > < code > permission_error(replace, protocol, Identifier)< / code > < / dd >
< dt > Relations is not a list:< / dt >
< dd > < code > type_error(list, Relations)< / code > < / dd >
< dt > Directives is not a list:< / dt >
< dd > < code > type_error(list, Directives)< / code > < / dd >
< dt > Clauses is not a list:< / dt >
< dd > < code > type_error(list, Clauses)< / code > < / dd >
< / dl >
< / blockquote >
< h4 > Examples< / h4 >
< blockquote >
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< pre > | ?- create_category(foo, [implements(bar)], [], [bar(1), bar(2)]).< / pre >
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< a href = "protocol_property2.html" > previous< / a > | < a href = "../../glossary.html" > glossary< / a > | < a href = "create_object4.html" > next< / a >
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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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