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0 pointsavereveard2y ago0 comments

using the exception only works at whole symbol level, i.e. with "cat do" as imput

No terminal matches 'd' in the current parser context, at line 1 col 5

cat do ^ Expected one of: * CAT * SPACE * FISH * DOG

Next valid symbols: ['* CAT\n\t* SPACE\n\t* FISH\n\t* DOG']

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3 comments · 1 top-level

IanCal2y ago· 2 in thread

I'm not sure I understand, what that reports is enough to solve it right? Was the problem you couldn't get it to solve it from that point?

avereveardOP2y ago

No because if I add space to the original string I don't get a valid string

Or given the context space is a valid production from the last error, but then I would need to roll back the incomplete "do" terminal and lose that context.

IanCal2y ago

> No because if I add space to the original string I don't get a valid string

Yeah, it's telling you what it was expecting when it hit an invalid token.

You take the invalid part and filter the list of suggestions with it. If you tell chatgpt about the problem it solves it.

(Edit - when I was running this, having any number of spaces was parsed as valid btw if that's the concern - space was a valid option)

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