Delimiters consisting of multiple elements are shown in wrong order

[nichtich]

With

echo 'x=x|1..,("a" "b")|' > x.peggy; ./bin/peggy-tracks.js x.peggy

You get

but the result should be

[hildjj]

I remember we had some discussion of this before. let me see if I can find it.

[hildjj]

Maybe it was on Discord. Shrug. I remember the gist being I was upset that it was wrong (as you point out) and several people chimed in that it was easier to read when it was wrong because they are L2R biased. Then I suggested a backwards-S-curve, but that seemed so ugly nobody wanted it. Then we moved on to other things. :)

[hildjj]

Here is the discussion #11 (comment)

[nichtich]

It seems to have been ignored in the discussion to solve other things first. In any case, the current outcome is wrong. The only workaround is not not allow multiple elements in delimiters. If readability is the matter, a small arrow head might help to indicate the reverse direction.

[hildjj]

If we reverse the return sequence, we have to recursively reverse all sequences deeper in it as well. Are there any other constructs that would need to be reversed?

[nichtich]

I don't think there are other constructs but sequences. If a delimiter contains another repetition group with multiple elements, the inner delimiter list would need to be reversed twice but anyone writing such grammar would better need to be punished.