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< title > Logtalk entity directive: op/3< / title >
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< div class = "top-left" > Logtalk reference manual< / div >
< div class = "top-right" > Entity directive: op/3< / 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 class = "code" > op/3< / h2 >
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< h4 > Description< / h4 >
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< pre > op(Precedence, Associativity, Operator)< / pre >
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< p >
Declares operators. Operators declared inside objects and categories have local scope. Global operators can be declared inside a source file by writing the respective directives before the entity opening directives.
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< h4 > Template and modes< / h4 >
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< pre > op(+integer, +associativity, +atom_or_atom_list)< / pre >
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< h4 > Examples< / h4 >
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< pre > :- op(950, fx, +).
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:- op(950, fx, ?).
:- op(950, fx, @).
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:- op(950, fx, -).< / pre >
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< span class = "date" > Last updated on: November 16, 2005< / span >
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