From: Michael Brooks <michael.brooks@...>
Date: 2009-09-07T08:00:06+09:00
Subject: Re: How can I  do this with regex?

Hello Ahmet:

I'm not a Ruby guru or anything, I still do most of my coding in Delphi (I 
love Ruby but it's too slow).  However, here are a few hints to help you do 
what I think your wanting to do (note: each assumes you've filled 
current_line with a line of text from your Delphi code):

1) Returns true if current_line contains something like " TMyClass = class 
(TObject)" :
-> current_line.match(/=\sclass\b/i)

2) Returns the class name (e.g. TMyClass) from current_line found with the 
regex from #1:
-> current_line.match(/^\s*T(\w*)/)

3) Returns true if the current_line variable starts with and only contains 
the word "implementation" which will be important for you to know when your 
about to enter the implementation section:
-> current_line.match(/^\s*implementation\s*$/i)

4) You'll need to keep track of the class names you've captured and use a 
regex in the implementation section to find when you've found a usage of a 
class.  I'll leave that to you to figure out.  However, testing for a word 
(i.e. the class name) on it's own using regex word boundaries with something 
like this should help:
-> current_line.match(/\bTMyClass\b/i)

5) You can use variables (e.g. each class name you're searching for) within 
a regex by wrapping it in #{} like this:
-> current_line.match(/#{myvariable}/)

6) This Ruby feature seems to be very usefull for code parsing, it tells you 
that you're currently between lines that contains "begin" and "end".
-> current_line.match(/begin/i) ... current_line.match(/end/i)

7) Google is your friend; here are a few links (including an online regex 
evaluator to play with) I found usefull...
http://rubular.com/
http://www.rubyxp.com/
http://www.rubyist.net/~slagell/ruby/regexp.html
http://codelikezell.com/how-to-use-ruby-variables-in-regular-expressions/
http://www.regular-expressions.info/ruby.html

Good Luck,

Michael


"Ahmet Kilic" <ahmedkilic@gmail.com> wrote in message 
news:f38b1d0e6f0a0cb4ea4b9d0adf3dcda4@ruby-forum.com...
>I want to grep Delphi "class name" and "reference classes" in a delphi
> class file.
> How can I do that with regex?
>
> example delphi class like this;
>
> http://exampledelphi.com/?p=62
>
> any idea?
> -- 
> Posted via http://www.ruby-forum.com/.