public virtual string ToConditionalString(RegexConditionalNode conditionalNode)
{
if (!IsConditionalSupported)
{
throw new ConditionalNotSupportedException(RegexLanguage);
}
if (conditionalNode == null)
{
throw new ArgumentNullException(nameof(conditionalNode));
}
var sb = new StringBuilder();
sb.Append(ToTokenString(RegexToken.ConditionalOpen));
if (string.IsNullOrWhiteSpace(conditionalNode.NameOrNumber))
{
sb.Append(ToTokenString(RegexToken.PositiveLookaheadAssertionOpen))
.Append(conditionalNode.IsInnerNodeIncluded ? conditionalNode.InnerNode.ToString() : conditionalNode.Pattern)
.Append(ToTokenString(RegexToken.PositiveLookaheadAssertionClose));
}
else
{
sb.Append(ToTokenString(RegexToken.GroupOpen))
.Append(conditionalNode.NameOrNumber)
.Append(ToTokenString(RegexToken.GroupClose));
}
sb.Append(conditionalNode.TrueValue)
.Append(ToTokenString(RegexToken.Alternation))
.Append(conditionalNode.FalseValue)
.Append(ToTokenString(RegexToken.ConditionalClose));
return(AddQuantifier(sb.ToString(), conditionalNode.Minimum, conditionalNode.Maximum, conditionalNode.RegexQuantifierOption));
}
/// <summary>
/// Add an existing <see cref="RegexConditionalNode"/> to the generator.
/// </summary>
/// <param name="conditional"><see cref="RegexConditionalNode"/> to be added.</param>
/// <returns><see cref="RegexGenerator"/></returns>
/// <exception cref="ConditionalNotSupportedException">Conditional is not supported by <see cref="RegexLanguage"/>.</exception>
public RegexGenerator AddConditional(RegexConditionalNode conditional)
{
if (!IsConditionalSupported)
{
throw new ConditionalNotSupportedException(RegexLanguage);
}
return(Add(conditional));
}
/// <summary>
/// Create and add <see cref="RegexConditionalNode"/> to the generator, and include another <see cref="RegexNode"/> inside.
/// </summary>
/// <param name="innerNode">An existing <see cref="RegexNode"/> to be included.</param>
/// <param name="trueValue">Value of successful match.</param>
/// <param name="falseValue">Value of failed match.</param>
/// <param name="nameOrNumber">Name or number for backtracking.</param>
/// <param name="min">Optional minimum number of occurance.</param>
/// <param name="max">Optional maximum number of occurance.</param>
/// <param name="quantifierOption">Optional quantifier option.</param>
/// <returns><see cref="RegexGenerator"/></returns>
/// <exception cref="ConditionalNotSupportedException">Conditional is not supported by <see cref="RegexLanguage"/>.</exception>
public RegexGenerator AddConditional(RegexNode innerNode, string trueValue, string falseValue, string nameOrNumber = null, int?min = null, int?max = null, RegexQuantifierOption quantifierOption = RegexQuantifierOption.Greedy)
{
var conditionalNode = new RegexConditionalNode(innerNode, trueValue, falseValue, nameOrNumber, min, max, quantifierOption);
return(AddConditional(conditionalNode));
}
