[TxMt] Re: Regexp generator for language grammars wanted

[Hans-Jörg Bibiko]

On 22.09.2008, at 10:19, Hans-Jörg Bibiko wrote:
> Does someone have a function which does the reverse thing, i.e.
>
> to get from
> NS(Mutable(String|Array)|C(oder|ell(Item)?)|Array)
>
> this:
> NSArray
> NSMutableString
> NSMutableArray
> NSCell
> NSCellItem
> NSCoder


I believe I found a way to do the reverse.

Install the attached command, edit a tmLanguage in TM, select a given  
optimized regexp and invoke that command. It will open a new doc with  
a sorted list of - hopefully - all matched keywords. I tested it for  
some of these regexps BUT PLEASE check it whether it works for  
everything ;)

If someone has a better way to do this let it me know.

Here the Ruby script:

def decompileRe (re)
   # handle foo(bar|boo|bou)? => foo|foobar|fooboo|foobou
   while m = re.match(/\b(\w+)\(([^(]+?)\)\?/) do
     re.sub!(/\b(\w+)\(([^(]+?)\)\?/, "#{m[1]}|#{m[2].split('|').map {| 
x| m[1] + x }.join('|')}")
   end
   # handle foo(bar|boo|bou) => foobar|fooboo|foobou recursively
   while m = re.match(/\b(\w+)\(([a-zA-Z\|]+?)\)/)  do
     re.sub!(/\b(\w+)\(([^(]+?)\)/, "#{m[2].split('|').map {|x| m[1] +  
x }.join('|')}")
   end
   # return sorted array
   return re.split('|').sort
end


decompileRe(STDIN.read.chomp).each {|r| puts r}

--Hans


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