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4.1.5.2 Manipulating and Inspecting Operators

To add or remove an operator, use op(Precedence, Type, Name). op/3 declares the atom Name to be an operator of the stated Type and Precedence. If Precedence is 0, then the operator properties of Name (if any) are cancelled. Please note: operators are global, as opposed to being local to the current module, Prolog text, or otherwise. See mpg-ref-op.

To examine the set of operators currently in force, use current_op(Precedence, Type, Name). See mpg-ref-current_op.


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