DIP58: ".." as a Binary Operator

[Chris Williams]

On Monday, 17 March 2014 at 20:13:20 UTC, Mason McGill wrote:
> Interesting, though I feel like operator syntax really shines 
> when either
>   1) It's significantly shorter/simpler than the equivalent 
> function calls.
>   2) It appeals to domain-specific intuitions.

In general, I agree. Though I think that my examples suffer from 
being poor examples and for allowing the most complete 
overridability (short of using lambdas). The .. operator could be 
written to only accept a constant step, like:

a ..!5 b;

The place where I was thinking that templating normal operators 
might be handy is actually in games, where you might want to (for 
example) treat a 4x4 matrix in the input as a 4x3 matrix during 
multiplication.

a *!M43 b;

Again, by restricting the allowed template parameters, rather 
than exposing code, you do end up with a shorter syntax, than a 
function call.