expr: Fix parsing negated character classes "[^a]" #7884
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We have to track if the previous character was already escaped to determine if the '\' character should be interpreted as an escape character.
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cakebaker
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May 4, 2025
Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>
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RenjiSann
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May 23, 2025
* expr: Fix regex escape logic We have to track if the previous character was already escaped to determine if the '\' character should be interpreted as an escape character. * expr: Fix parsing caret (^) as character class negation token * expr: Add tests for parsing carets in regex * expr: Add missing semicolon * expr: Simplify boolean assignment Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com> --------- Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>
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Fix the logic for parsing carets (^) when used as a character class negation token. Also, the '' character is now only interpreted as an escape token if it is not already escaped.
Added tests to verify the caret parsing and escaping logic.
fixes #7880