/// <summary>
/// Creates multiple example regexp.
/// </summary>
public static void CreateExampleRegExp()
{
// regex : (aa)*(aa)+
string regex1 = "(aa)*(aa)+";
RegExpression expression1 = new RegExpression(regex1);
Console.WriteLine($"Language (aa)*(aa)+ \n" +
$"Language via toString method = {expression1.ToString()}\n");
// regex : a* (aa+ | ba*b ) * (abba | baab | bbbb)+
string regex2 = "a* (aa+ | ba*b ) * (abba | baab | bbbb)+";
RegExpression expression2 = new RegExpression(regex2);
Console.WriteLine("Language a* (aa+ | ba*b ) * (abba | baab | bbbb)+ \n" +
$"Language via toString method = {expression2.ToString()}\n" +
$"Word asdasdsd \n\n");
// regex : (a*b*)+ (bb*b | ab*baa)+
string regex3 = "(a*b*)+ (bb*b | ab*baa)+";
RegExpression expression3 = new RegExpression(regex3);
Console.WriteLine("Language (a*b*)+ (bb*b | ab*baa)+ \n" +
$"Language via toString method = {expression3.ToString()}\n" +
$"Word asdadsad \n\n");
}
/// <summary>
/// Easier visualisation of the regexpression as string
/// </summary>
public override string ToString()
{
string regexString = "";
if (terminals != "")
{
regexString = terminals;
}
else
{
if (right != null)
{
regexString += "(";
}
regexString += left.ToString();
switch (o)
{
case Operator.PLUS:
regexString += '+';
break;
case Operator.STAR:
regexString += '*';
break;
case Operator.OR:
regexString += '|';
break;
}
if (right != null)
{
regexString += right.ToString();
regexString += ')';
}
}
return(regexString);
}