AutoHotkey Community

This parses regex and shows modifiers, subpatterns, alternations and repetitions in a hierarchical format. Special characters like \b and $ are defined and all groups are matched and displayed in a ListView.

This is just an alpha test, it was originally a modification for toralf's script but became something quite different.

Screenshot:


Download

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GitHub • Scripts • IronAHK • Contact by email not private message.

That's funny, I though regexes were a good opportunity to test the treeview component, but never managed to work on such script. Now, you removed all motivation to do it...

Might I suggest you name it RegExAnalyzer? It might better describe your program (or Analyzer & Tester). Any way, the name conflict with toralf' script is annoying (I have to unzip somewhere else and rename one...).

I see a typo in the screenshot: \w: [...] charcter

OK, now, I will test it a bit...

[EDIT] Looks fine after a short test. It will be a great learning tool! Congratulations.

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vPhiLho := RegExReplace("Philippe Lhoste", "^(\w{3})\w*\s+\b(\w{3})\w*$", "$1$2")

lol, feel free to post your mods/scripts.

I like it. It'll be renamed in the next version (cba to take another screenshot).

Cheers. There might be a whole lot more, I'll have to double check the Analyze function

Thanks

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First bug report:
- It saved automatically my test Context, but I lost the leading spaces...
- It updates the tree in real time, but there are some weird stuff:
. I type ^\s+(?P<a>\w+), it is OK. If I type x after ), still OK. If I type x before \w, it is displayed with 3 weird chars after (slashed o).
. I type (\d) after \w+, the program ceases to update the tree... The tree seems to be crashed, as it doesn't refresh. I have to restart te program.
It is an issue with real-time update, if I paste ^\s+(?P<a>\w(\d)) in the freshly opened window, it works.

Note sure of the difference between string and literal string...
\x85 isn't recognized as a single char.

^>\s*(?P<a>\w(?<b>\s*(?'c'\d+([A-Z]+?)))) gives weird results...
^>\s*(\w+(-*(\d+([A-Z]+?)))) is better, but it seems to miss deeply nested captures.

You started an ambitious program, it will be hard (but interesting) to bring it out of alpha state...

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vPhiLho := RegExReplace("Philippe Lhoste", "^(\w{3})\w*\s+\b(\w{3})\w*$", "$1$2")

If I can't fix it I'll switch to using an XML settings file.

Strange, I'll take a look.

Literal string should say 'escaped'. I'll change this.

Sigh, even a bunch of expressions like ((?:(?<!\\)\((?:(?:[^\)]*\([^\)]*\)[^\)]*)|[^\)]*)(?<!\\)\)|(?<!\\)(?:\[[^]]*(?<!\\)\]|\{[^\}](?<!\\)\})|(?<!\\)\\[^\.aAbBzZ]|(?<!\\)\.)(?:\{\d+(?:,\d+)?\}|[\*\+\?])?\??) will not cover everything. I'll see if I can make amends.

Thanks for the feedback.

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Very nice Titan.

Great tool. Thanks for creating/sharing this.

I always felt that it's misleading to regard `a as merely CRLF/LF/CR, but supposed OK practically.
The reason I'm now saying about it is that I noticed PCRE was updated lately to 7.1 where introduced was new flag,
which does exactly the above:

RegExAnalyzer is amazing!

Thanks everyone.

Changes in Alpha 2:

• Sets are more descriptive
• \Q...\E now supported
• Drastic improvements to regex parser (took me a while to accept the fact that nested parentheses can't be extracted with a single expression)
• Alternations include subpatterns on either side where appropriate
• Regexes can be saved and deleted (with autosave on exit)
• New control showing replacement text (in Context tab)
• Several description changes
• ListView now shows output variables
• Minor UI tweaks

I haven't moved up to beta because there's some more features I'd like to add, such as a regex builder.

A couple bugs I noticed: AutoHotkey crashes when switching regexes if you omit the braces for the If on line 376, and `a/`r`/`n aren't parsed as options in certain strange conditions - try removing the second RegExReplace on line 68 to see what I mean.

I just copied the docs, which says it "Recognizes any type of newline, namely `r, `n, or `r`n".

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You probably realize that omitting the braces causes the ELSE to become owned by the inner IF and not the outer one. This seems to cause an infinite loop (as evidenced by the CPU staying maxed on my system). When combined with your use of Critical in the auto-execute section, the missing braces seem to hang the script (though it doesn't crash on my system). Removing Critical solves the hang but the GUI window doesn't seem to function much at all.

Its hard to analyze in its current state because I don't understand the script well enough. If you ever happen to reproduce it with a simpler example, please let me know.

Thanks.

thanks very much for the script, but its needs improvement imo

A)
for example, I type "." and it replies: "matches any character"

this is not what I want, because its not accurate:

1) how many instances of the character?
2) what are "characters" ? you have to tell me all the characters
3) you mean alphanumeric characters too? letters AND numbers or only letters? in other words how do you define characters? are αβγ characters as well? or only abc?

so a better reply would be:

. matches any character (parenthesis a,b,c,d,etc) of one instance, etc of any case, etc

B)

also in addition to the explanation of the regex, I would like it to make a list of the stings that match this regex

eg if I type to it .. it should reply:

1) matches two instances of a character (these are meant to be characters: abc,etc)

AND

2) this is the list that this regex matches:

aa,ab,ac, etc

this can be very big, so it should display some only, but to have the ability to build the matching strings in a txt file

thanks

'Character' is singular so it implies only one instance. Alphanumeric, letter, number, symbol all have restrictive meanings and by definition 'character' is all of them.

While I like the idea a reverse regex would be extremely complex. Instead the program will show you the matching set in the listview - so you can work with the context.

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Please provide a list of everything this matches: .*

a(anything)
b(anything)
etc