CODEWITHSUNDEEP
c#regex
LWS
LWS

Reputation: 329

Regex splting by using different seperators

I want to split a text line which has the following pattern:

 Name : Type := start_value ; // comment

start_value and comment are optional, the semicolon is mandatory. This is an example of a few lines:

 MinF : DINT ;  //Minimum frequentie: 0 = 0,0 Hz
 MaxF : DINT  := L#100000;  //Maximum reference:75000 = 75,0Hz
 RampUp : DINT  := L#50;    //Ramp up tijd: 100 = 1,00 seconde
 RampDown : DINT  := L#50;  //Ramp down tijd: 100 = 1,00 seconde
 V1 : DINT ;    //Snelheid 1:  50,00%

Can I do this with just use one regex?

Upvotes: 0

Views: 42

Answers (1)

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186678

I suggset matching instead of splitting. With a help of pattern like

string pattern = 
  @"^\s*(?<Name>[A-Za-z0-9]+)\s*:\s*(?<Type>[A-Za-z0-9]+)(\s*:=\s*(?<Value>\S*))?\s*;\s*(//(?<Comment>.*))?$";

we can easily parse the lines

string[] source = new string[] {
  "MinF : DINT ;  //Minimum frequentie: 0 = 0,0 Hz",
  "MaxF : DINT  := L#100000;  //Maximum reference:75000 = 75,0Hz",
  "RampUp : DINT  := L#50;    //Ramp up tijd: 100 = 1,00 seconde",
  "RampDown : DINT  := L#50;  //Ramp down tijd: 100 = 1,00 seconde",
  "V1 : DINT ;    //Snelheid 1:  50,00%",
};

var result = source
  .Select(line => Regex.Match(line, pattern))
  .Where(match => match.Success)
  .Select(match => new {
     name = match.Groups["Name"].Value,
     type = match.Groups["Type"].Value,
     value = match.Groups["Value"].Value,
     comment = match.Groups["Comment"].Value, })
  .ToArray();

Test

Console.Write(string.Join(Environment.NewLine, result
  .Select(item => $"{item.name,-8} {item.type,4} {item.value,-8} {item.comment}")));

Outcome:

MinF     DINT          Minimum frequentie: 0 = 0,0 Hz
MaxF     DINT L#100000 Maximum reference:75000 = 75,0Hz
RampUp   DINT L#50     Ramp up tijd: 100 = 1,00 seconde
RampDown DINT L#50     Ramp down tijd: 100 = 1,00 seconde
V1       DINT          Snelheid 1:  50,00%

Upvotes: 1

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