How Can I Avoid Replacing >= With > =

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Hi,

I am trying to validate operators in my coding. After typing input I need to replace input with space which is working fine but here is one problem, if I am trying to replace >= with space it is breaking in two par > = which is wrong. I can't remove "logicdata.Replace("<", " < ").Replace(">", " > ")" from coding as I need this also.
So please suggest How can I avoid it.

Below is the coding.

var validatelist = logicdata.Replace("<", " < ").Replace(">", " > ").Replace(">=", " >= ").Replace("{", " { ").Replace("}", " } ").Replace(")", " ) ").Replace("(", " ( ").Replace("+", " + ").Replace("-", " - ").Replace("&&", " && ").Replace("==", " == ").Replace("||", " || ").Replace("!=", " != ").Replace("<=", " <= ").Replace("&=", " &= ").Replace("<<=", " <<= ").Replace(">>=", " >>= ");

Thank in advance.

Posted 24-Jan-16 20:38pm

Member 11249921

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BillWoodruff · Answer 1 · 2016-01-24T21:11:00

Solution 1

First, I have to say that I have trouble imagining what kind of scenario you'd need to this in.

But, if I had to do this:

C#

.Replace(">=", "GTE")
.Replace("<=", "LTE")
.Replace("<<=", "SFL")
.Replace(">>=", "SFR")

.Replace("<", " < ")
.Replace(">", " > ")

.Replace("GTE", " >= ")
.Replace("LTE", " <= ")
.Replace("SFL", " <<= " )
.Replace("SFR", " >>= ");

Perhaps one of our resident RegEx gurus will come along and make it easy :)

Posted 24-Jan-16 21:11pm

BillWoodruff

Comments

Philippe Mori 25-Jan-16 22:52pm

Well, it might be a good idea to replace operators with a string that contains otherwise unused symbols like §GTE§ to avoid potential conflicts with existing text.

If this is to be done only once to normalize a code base, then that simpler solution might be more than adequate. If this is intended to be used regularly, then it would be better to use Regex... or even better since Roslyn is now open source, use it to properly parse and modify source.

BillWoodruff 25-Jan-16 23:06pm

Hi Philipe, as I tried to imply, I have the feeling this type of processing should be avoided, if at at all possible, by application design.

Re: Roslyn and parsing; I'd like to see a good article on that; hope you will write it !

cheers, Bill

Philippe Mori 25-Jan-16 23:21pm

I don't know much about it except that I have seen a video that show how to modify the compiler to recognize « and » as additional quotes symbol and I take a fast look on code just to have a idea of what the code look like.