range syntax

Love this idea for range syntax from Tony Finch

I’m also dissatisfied with the range or slice syntax in basically every programming language I’ve seen. I thought it might be nice if the cute comparison and iteration syntaxes were aspects of a more generally useful range syntax, but I couldn’t make it work.

Until recently when I realised I could make use of prefix or mixfix syntax, instead of confining myself to infix.

So now my fantasy pet range syntax looks like

    >= min < max    // half-open
    >= min <= max   // inclusive

And you might use it in a pattern match

    if x is >= min < max {
        // ...
    }

Or as an iterator

    for x in >= min < max {
        // ...
    }

Or to take a slice

    xs[>= min < max]