Stats

  • Locked Locked
  • Replies 3
  • Subscribers 142
  • Views 16894
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Using rexReplace and rexCompile

cessej

 I just did some few rounds for testing rexCompile and rexReplace. I need help because Im not too expert in string manipulations. Here's my code.

procedure(strcheck()

let((mystring test_string newString)

mystring=",<.>/?;:'\"{}_|`~!@#$%^&()=-]\\[*+"

println(length(parseString(mystring ""))) ;output must be 32

foreach(char parseString(mystring "")

test_string=strcat("cessej" char char)

rexCompile(char)

newString=rexReplace(test_string "A" 0)

if(newString!="cessejAA" then printf("Wrong output for %L\n" char))

)

)

)

 *********************************************************************************

1. When at character "[", got error *Error* rexCompile: Missing ] - "["

2. When at character backslash("\\"), got error *Error* rexcompile: Trailing backslash - "\\"

3. When at character "*", "+", got error *Error* rexCompile: Empty closure - "*"

4. Wrong rexReplace ouput at character ".", "$", "^". Expected output is "cessejAA".

Please help to make the rexReplace result equal to "cessejAA".

  • Andrew Beckett

    Well, this is a bit of an odd thing to do - you are trying to match all the "magic" characters in regular expressions, many of which need multiple character sequences. For example, "[a-z]" is a range of characters, so a "[" on its own makes little sense. It's not a "regular expression" any more.

    If that's what  you want, you could use rexMagic(nil) at the beginning of the code and rexMagic(t) at the end. I'm always very wary of advising people to play with rexMagic() because there's a chance you'll leave it off and that may break other parts of the code - as it's a global switch.

    Note too that in IC61 you have the more advanced pcre* functions which are more powerful.

    Regards,

    Andrew.

  • Andrew Beckett

    You could also escape some of the characters (e.g. "\\[") but you can't do that for all the characters you have above because some that doesn't mean anything (e.g. <>) and some the normal character is not special, but the escaped character is (e.g. "(" is not special, but "\\(" is)

    Andrew

  • cessej

    Thanks for the quick reply.

    I'm able to find the right rexCompile string for each character.

    For these characters, $.^[*+, just put escape characters for the rexCompile string (e.g "\\[")

    For backslash, rexCompile string must be "[\\]"

    The rest of the characters can compile as it is.

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.