Bug when matching brackets

[margual56]

Describe the bug

I can't seem to match either '{' or '[' using the parser integrated in the pest website.

To Reproduce

Click here to try it out.

Grammar

WHITESPACE = _{ " " | "\t" | NEWLINE }

properties = { "[" ~ ASCII* ~ "]" }

Text to match

[This is a note]

Output

 --> 1:1
  |
1 | [This is a note]
  | ^---
  |
  = expected properties

Screenshot

Extra

I've also tried with: properties = { "{" ~ ASCII* ~ "}" } and properties = @{ "[" ~ ASCII* ~ "]" }, but it gives the same error.

Expected behavior

Clearly, it should be able to match the given string... right?

[tomtau]

PEGs are eager: https://pest.rs/book/grammars/peg.html#eagerness
so ASCII* will also match ], and the whole expression will fail to match.

You can try ASCII_ALPHANUMERIC (https://pest.rs/book/grammars/built-ins.html#ascii-rules) instead:

properties = { "[" ~ ASCII_ALPHANUMERIC* ~ "]" }

or you can define your own rule of allowed characters that can be inside brackets

[margual56]

Thank you for the answer!

[margual56]

Sadly it still does not work :(

[tomtau]

Do you have the WHITESPACE rule defined?

[tomtau]

https://pest.rs/?g=N4Ig5gTghgtjURALhAdQBIEkAqBRAygAoCCAwrgAQC8FA%2BsBQDohMsA%2BrjjALsxRwDlcqADKYhFAL6MAdrIAOEAPbyAphG4BLVQGdqFBswDafAH4Vi%2BUpky1iIwumICAqgFlcAJUykAVBXNmAF0%2BaRkQABoQTRl5AFduZBAjbAALTT0MiigKGSVuVSCQSSA#editor

[margual56]

Nope, I took it out for the demo here, that was the issue 😆

Thank you so much!