Does not recognize non-capturing groups, positive|negative lookahead|lookbehind.

[ssent1]

Hi!

Great tool.

Are there simplification rules to cover non-capturing groups, lookahead, and lookbehind cases?

Here's what I'm running into…

(?# ?: ≡ non-capturing group)
pre-REG                        === post-REG
([A-G](?:[m♭♯]{1,2})?\(add9\))  ≠  [A-G]?:[m♭♯]{1,2}?\(add9\)
34 matches                      ≠ no match

(?# Negative|Positive Lookbehind|Lookahead)
pre-REG                                 === post-REG
Negative Lookbehind: (?<!\S)\S+\(add9\)  ≠  Error: RegexError is not defined
Negative Lookahead : \S+\(add9\)(?!\S)   ≠  Error: RegexError is not defined
Positive Lookahead : \S+(?=\(add9\))\S+  ≠  Error: RegexError is not defined
Positive Lookbehind: \S+(?<=\(add9\))    ≠  Error: RegexError is not defined
34 matches                               ≠  Error: RegexError is not defined

☛ regex flavour = PCRE (PHP)

[ibudiselic]

Hello Syd, No - the tool supports a minimal and thus very limited regular expression syntax, much like what you find when learning about regular expressions as a formal system in a University setting. Cheers, Ivan

…

On Wed, Sep 9, 2020 at 4:18 AM Syd ***@***.***> wrote: Hi! Great tool. Are there simplification rules to cover non-capturing groups, lookahead, and lookbehind cases? Here's what I'm running into… (?# ?: ≡ non-capturing group) pre-REG === post-REG ([A-G](?:[m♭♯]{1,2})?\(add9\)) ≠ [A-G]?:[m♭♯]{1,2}?\(add9\) 34 matches ≠ no match (?# Negative|Positive Lookbehind|Lookahead) pre-REG === post-REG Negative Lookbehind: (?<!\S)\S+\(add9\) ≠ Error: RegexError is not defined Negative Lookahead : \S+\(add9\)(?!\S) ≠ Error: RegexError is not defined Positive Lookahead : \S+(?=\(add9\))\S+ ≠ Error: RegexError is not defined Positive Lookbehind: \S+(?<=\(add9\)) ≠ Error: RegexError is not defined 34 matches ≠ Error: RegexError is not defined ☛ regex flavour = PCRE (PHP) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#38>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAG243DI65YXQ7KICM6LWDTSE3QXLANCNFSM4RAZWKGA> .