Thanks to Tom for his interesting points. I am still developing an inuition for how the error reporting goes. (-: On Thu, 1 Jan 2004, Derek Elkins wrote: (snip)
testOr3 = do{ try (string "(a"); char ')'; return "(a)" } (snip) example both issues come up. If we successfully parse the "(a" then the second alternative "(b)" can't possibly succeed and since it can't succeed there's no point in saving the input "(a" to be reparsed when backtracking since there's no point in backtracking. (snip)
Ah, that makes sense - thanks! I think part of my problem might have been the quoted and real brackets and braces - at least a couple of times, I thought the char and the return were within the try. (-: I will try to look more carefully next time. -- Mark