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YAP 7.1.0
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op(+ P,+ T,+ A)
defined in the ISO standard
Defines the operator A or the list of operators A with type T (which must be one of xfx
, xfy
,yfx
, xf
, yf
, fx
or fy
) and precedence P (see appendix iv for a list of predefined operators)
Note that if there is a preexisting operator with the same name and type, this operator will be discarded Also, ,
may not be defined as an operator, and it is not allowed to have the same for an infix and a postfix operator