Method lfun::`-()
- Method `-
mixed `-(void|zero arg)
- Description
Negation and left side subtraction/set difference callback.
This is used by `-. When called without an argument the result should be a new instance that represents the negation of this object, otherwise the result should be a new instance that represents the difference between this object and arg.
- Note
It's assumed that this function is side-effect free.
- See also