Re: Re: removing C style comments from text files

I address this problem by replacing quoted strings with unique tags prior to removing the comments. After stripping the comments I then restore the original strings for those tags remaining (some may get stripped).

Comment on Re: Re: removing C style comments from text files

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Re: removing C style comments from text files by Abigail-II (Bishop) on Jan 06, 2004 at 13:16 UTC
That's kind of a chicken-and-egg problem, isn't? How can you succesfully remove strings, if you can't detect comments? Consider: `/* One " two / a = b + 4; / three " four /` [download] You have to do it all in one pass. Something like: `s { ( [^"'/] # Not a string, character o +r comment. \| "[^\\"](?:\\.[^\\"])" # String. \| '[^\\'](?:\\.[^\\'])' # Char. \| / (?![]) # Slash, not a comment. ) \| ( /[] [^] (?: [] [^/]* )* [*]/ ) # Comment. } { $2 ? "" : $1 }gsex;` [download] But that isn't fool proof either (consider `# define`). Abigail	[reply] [d/l] [select]

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Re: removing C style comments from text files
by Abigail-II (Bishop) on Jan 06, 2004 at 13:16 UTC

/* One " two */ a = b + 4; /* three " four */
[download]

s { (     [^"'/]*                          # Not a string, character o
+r comment.
      |  "[^\\"]*(?:\\.[^\\"]*)*"          # String.
      |  '[^\\']*(?:\\.[^\\']*)*'          # Char.
      |  / (?![*])                         # Slash, not a comment.
    )
      |
    ( /[*] [^*]* (?: [*] [^*/]* )* [*]/ )  # Comment.
  }
  { $2 ? "" : $1 }gsex;
[download]

# define

Abigail

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