Availability:built-in
[ISO]current_op(?Precedence, 
?Type, ?:Name)True if Name is currently defined as an operator of type Type 
with precedence Precedence. See also op/3. 
Note that an
unqualified Name does not resolve to the 
calling context but, when compiling, to the compiler's target module and 
otherwise to the typein module. See
section 4.25 for 
details.