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VerbalExpressions/DartVerbalExpressions

Dart Regular expressions made easy.

verbal_expressions

A library for Dart developers that helps to construct difficult regular expressions.

Dart package info is here: https://pub.dartlang.org/packages/verbal_expressions

Quick start

  var regex = VerbalExpression()
   ..startOfLine()
   ..then("http").maybe("s")
   ..then("://")
   ..maybe("www.").anythingBut(" ")
   ..endOfLine();

  // Create an example URL
  String url = "https://www.google.com";

  // Use VerbalExpression's hasMatch() method to test if the entire string matches the regex
  regex.hasMatch(url); //True

  regex.toString();   // Outputs the regex used: ^http(s)?\\:\\/\\/(www\\.)?([^\\ ]*)\$

  var regex = VerbalExpression()..startOfLine()..then("abc")..or("def");

  var testString = "defzzz";
  //Use VerbalExpression's hasMatch() method to test if parts if the string match the regex
  regex.hasMatch(testString);   // true

Feel free to use any predefined char groups:

  var regex = VerbalExpression()
	  ..wordChar()..nonWordChar()
	  ..space()..nonSpace()
	  ..digit()..nonDigit();

Define captures:

  var expression = VerbalExpression()
   ..find("a")
   ..beginCapture()..find("b")..anything()..endCapture()
   ..then("cd");
   
  RegExp regex = expression.toRegExp();

  var match = regex.firstMatch(text);
  print(match.group(0)); // returns "abcd"
  print(match.group(1)); // returns "b"