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Parser choke on ’ character #430

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jcubic opened this issue Jan 20, 2025 · 2 comments
Open
1 task

Parser choke on ’ character #430

jcubic opened this issue Jan 20, 2025 · 2 comments
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bug Something isn't working critical documentation regression resolved

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@jcubic
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jcubic commented Jan 20, 2025 •
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Using invalid quotation that is part of R7RS spec doesn't work anymore.

(list-ref ’(a b c d)
                (exact (round 1.8)))
;; ==> Error: You're using an invalid Unicode quote character. Run: (set-special! "’" 'quote) to allow the use of this type of quote
(set-special! "’" 'quote)
;; ==> Parser: expected parenthesis but eof found

And the REPL is totally bricked.

TODO:

  • document the usage of ’ from R7RS spec.
@jcubic jcubic added bug Something isn't working critical regression labels Jan 20, 2025
jcubic added a commit that referenced this issue Jan 21, 2025
@jcubic
fix broken REPL after syntax extensions error #430
abe109e 
When syntax extension throw an error inside an S-Expression,
the state inside the parser was not reset, and it was
throwing an error about unbalanced parentheses.
@jcubic
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jcubic commented Jan 22, 2025

The problem is with any error from Parser in the middle of S-Expression. The reason was that when parser gets a new expression in REPL, the state was not reset, so it was throwing an error about unbalanced parentheses.

@jcubic
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jcubic commented Jan 22, 2025

It's also worth documenting the use of ’ symbol while reading R7RS spec.

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