"Higher order syntactic sugar"

[Yitzchak Gale]

>> ... <= is already used as "smaller than
>> or equal to" :)

> ...what about this:  pattern =< expr

> ... let!, perhaps, but that would probably be too
> noisy for pattern guards? (also, we don't want to steal nice infix ops like <==)

I had suggested <<-
I wouldn't mind <-- or <== or the like.
I think any of these better suggest "similiarity to <- yet different".

(<= would have been perfect. Humph! They beat us to it.)

-Yitz