Operators overloading

[bearophile]

Jonathan M Davis:

> Another alternative would be to use a function like 
> std.algorithm.equal except
> that it tested that one of the arguments was equal to the first 
> one rather than
> just testing one argument against it. Something like
>
> const Vertex opBinary(string op)(const ref Vertex vertex)
>     if (isOneOf(op, "+", "-"))
> {...}
>
> Off the top of my head, I'm not aware of a function like that 
> in the standard
> library, but I may just not being think of it, and it probably 
> wouldn't be all
> that hard to write, at least if efficiency wasn't a major 
> concern.

It's named std.algorithm.canFind:

if (["+", "-"].canFind(op))

Bye,
bearophile