Regex pour diviser une ligne, mais avec un volume de captures

 
<?php
 
$input = "this (is) an (example of what) i am (talking about)";
$pattern = '#(\(.+\)|\w+\s)#U';
 
preg_match_all($pattern,$input,$match);
 
foreach($match[0] as $m) { echo "$m<br/>"; }
 
/*
output:
this
(is)
an
(example of what)
i
am
(talking about)
*/
?>
 

 
namespace Little_Utils {
  public class DisplayBlock {

    private List<String> _displayLines = new List<string>();

    private DisplayBlock(){}
   
    public static DisplayBlock CreateInstance(String inputString){
      DisplayBlock block = new DisplayBlock();
      block.Format(inputString);
      return block;
    }
   
    private void Format(String input){
      String pattern = @"(\(.+?\)|\w+?\s)";
      Regex regEx = new Regex(pattern);
      MatchCollection matches = regEx.Matches(input);
 
      for (int i = 0; i < matches.Count; i++) {
        String line = matches[i].Value.Replace("(", String.Empty).Replace(")", String.Empty).Replace(Environment.NewLine, String.Empty);
        _displayLines.Add(String.Format(line));
      }
    }
 
    public override string ToString() {
      StringBuilder builder = new StringBuilder();
      String lineFormat = "{0}" + Environment.NewLine;
     
      for (int i = 0; i < _displayLines.Count; i++) {
        String line = _displayLines[i].Replace("(", String.Empty).Replace(")", String.Empty).Replace(Environment.NewLine, String.Empty);
        if(i < (_displayLines.Count - 1)){
          builder.Append(String.Format(lineFormat, line));
        }else{
          builder.Append(line); //strip off the last new line
        }
      }
 
      return builder.ToString();
    }
   
    public String GetLine(int lineNumber){
      //this will throw an exception if the lineNumber exceeds the _displayLine count -1.
      //Catch it here or let it go to the caller.
      return _displayLines[lineNumber];
    }
   
    public int LineCount{
      get{return _displayLines.Count;}
    }
 
  }
}
 

Array
(
    [0] => Array
        (
            [0] => this
            [1] => (is)
            [2] => an
            [3] => (example of what)
            [4] => i'm
            [5] => talking
            [6] => about
            [7] => (I'll do it)
            [8] => This
            [9] => is
            [10] => a
            [11] => post-subject
            [12] => sentence
            [13] => (and a post-subject comment)
        )
 
    [1] => Array
        (
            [0] => this
            [1] => is
            [2] => an
            [3] => example of what
            [4] => i'm
            [5] => talking
            [6] => about
            [7] => I'll do it
            [8] => This
            [9] => is
            [10] => a
            [11] => post-subject
            [12] => sentence
            [13] => and a post-subject comment
        )
 
)