regexp-tree

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closes #239

deroke

Regex with 'u' flag and escaped special characters can't be parsed

4

Hi, Regex with unicode flag and some escaped special characters can't be parsed. For example the command `regexp-tree -e '/\./u'` returns "`invalid Unicode escape \.`". And also: - `/\^/u` -...

regseb

regexp-tree does not optimize `(\.(?!$)|$))$`

2

Coming from this SO post: https://stackoverflow.com/a/36760050 The regex `^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)(\.(?!$)|$)){4}$` got optimized (by hand) to: `^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$` so, `partbefore(\.(?!$)|$))$` can be expressed as `(partbefore\.?\b)$`, avoiding the negative look-ahead, making the regex smaller....

kurtextrem

Blacklist sub-rules of Transforms

5

Hello, Is there a way to disable sub-rules of transforms, without disabling the whole transform? For example, I don't want to disable all "charEscapeUnescape", but only the sub-rule for "]"....

ghnp5

Another false-positive: `effect` => `ef{2}ect`

1

When using optimiser, I'm getting this weird useless optimisation: `effect` => `ef{2}ect`

Jabher

[group-single-chars-to-char-class] corrupts regexp when using square bracket

1

Optimizes `/(\]|a|[12])/` into `/([12]a])/` which isn't correct

Maxim-Mazurok

# Description While working with conversions between NFA's and DFA's, I noticed an issue where the starting state had changed from the corresponding NFA. # Cases - a? `{ "_nfa":...

cmsalser

From deepscan.io: ``` Character range 'A-z' also matches non-alphabetical characters '[', '\', ']', '^', '_' and '`'. Did you mean 'A-Za-z' instead? ``` After transforming `[a-zA-Z]`

coderaiser

Backreferences appearing before their capture groups incorrectly treated as decimal escapes

3

The ES6 spec says that an expression like `\5` is a backreference "only if the integer value of DecimalEscape is

ridiculousfish

Broken optimization `/^[\p{Mc}\p{Me}\p{Mn}]$/` -> `/^[Mcen\p{}]$/`

2

``` invalid Unicode escape \p ``` Or ```js SyntaxError: Invalid regular expression: /^[Mcen\p{}]$/: Invalid property name in character class ```

coderaiser