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2 points by akkartik 2837 days ago | link | parent

There isn't a unified grammar for the language, I'm afraid. I've built wart in layers:

a) parse lisp as usual. This layer doesn't know about the regular vs infix distinction, so a, a-1 and ++a and ++ are all just tokens.

b) expand infix ops inside symbols, e.g. a+1 => (a + 1)

c) scan for operators inside lists and pinch them with the adjacent elements.

  (.. a ++ b ..) => (.. (++ a b) ..)
Edit: Notice that this is different from your example:

  (a infix b ..) => ((infix a b) ..)