Question

Please give a suggestion here:

I try to do a regex in C#. Here is the text

E1A: pop(+)
call T
call E1
E1B: return
TA: call F
call T1

I want to split it like this:

1)
E1A: pop(+)
call T
call E1

2)
E1B: return

3)
TA: call F
call T1

I tought at lookbehind, but it’s not working because of the .+

Here is what I hope to work but it doesn’t:

"[A-Z0-9]+[:].+(?=([A-Z0-9]+[:]))"

Does anyone have a better ideea?

EDIT: The “E1A”,”E1B”,”TA” are changing. All it remains the same is that they are made by letter and numbers follow by “:”

Answer 1

Regex regexObj = new Regex(
    @"^               # Start of line
    [A-Z0-9]+:        # Match identifier
    (?:               # Match...
     (?!^[A-Z0-9]+:)  #  (unless it's the start of the next identifier)
     .                #  ... any character,
    )*                #  repeat as needed.", 
    RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace);
allMatchResults = regexObj.Matches(subjectString);

Now allMatchResults.Count will contain the number of matches in subjectString, and allMatchResults.Item[i] will contain the ith match.