/// <summary>
/// Constructs a sequence of regex constructs.
/// </summary>
/// <typeparam name="TSymbol">The symbol type.</typeparam>
/// <param name="first">The first element in the sequence.</param>
/// <param name="rest">The remaining sequence elements.</param>
/// <returns>The sequence node constructed.</returns>
public static IRegExNode <TSymbol> Seq <TSymbol>(IRegExNode <TSymbol> first, IEnumerable <IRegExNode <TSymbol> > rest)
{
var result = first;
foreach (var second in rest)
{
result = new RegExSeqNode <TSymbol>(result, second);
}
return(result);
}
/// <summary> /// Constructs an alternative of regex constructs. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="first">The first alternative.</param> /// <param name="rest">The remaining alternatives.</param> /// <returns>The alternative node constructed.</returns> public static IRegExNode <TSymbol> Or <TSymbol>(IRegExNode <TSymbol> first, params IRegExNode <TSymbol>[] rest) => Or(first, rest as IEnumerable <IRegExNode <TSymbol> >);
/// <summary> /// Constructs a node repeated between N and M times. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="n">The minimum number of repetitions.</param> /// <param name="m">The maximum number of repetitions.</param> /// <param name="element">The element to construct the repetition from.</param> /// <returns>The repetition node constructed.</returns> public static IRegExNode <TSymbol> Between <TSymbol>(int n, int m, IRegExNode <TSymbol> element) => new RegExRepBetweenNode <TSymbol>(n, m, element);
/// <summary> /// Constructs a node repeated at most N times. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="n">The maximum number of repetitions.</param> /// <param name="element">The element to construct the repetition from.</param> /// <returns>The repetition node constructed.</returns> public static IRegExNode <TSymbol> AtMost <TSymbol>(int n, IRegExNode <TSymbol> element) => new RegExRepBetweenNode <TSymbol>(0, n, element);
/// <summary> /// Constructs a node repeated at least N times. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="n">The minimum number of repetitions.</param> /// <param name="element">The element to construct the repetition from.</param> /// <returns>The repetition node constructed.</returns> public static IRegExNode <TSymbol> AtLeast <TSymbol>(int n, IRegExNode <TSymbol> element) => new RegExRepBetweenNode <TSymbol>(n, null, element);
/// <summary> /// Constructs a node repeated exactly N times. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="n">The number of repetitions.</param> /// <param name="element">The element to construct the repetition from.</param> /// <returns>The repetition node constructed.</returns> public static IRegExNode <TSymbol> Exactly <TSymbol>(int n, IRegExNode <TSymbol> element) => new RegExRepBetweenNode <TSymbol>(n, n, element);
/// <summary> /// Constructs an optional node from <paramref name="element"/>. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="element">The element to construct the optional from.</param> /// <returns>The optional node constructed.</returns> public static IRegExNode <TSymbol> Opt <TSymbol>(IRegExNode <TSymbol> element) => new RegExOptNode <TSymbol>(element);
/// <summary> /// Constructs a 1-or-more repetition node from <paramref name="element"/>. /// </summary> /// <typeparam name="TSymbol">The symbol type.</typeparam> /// <param name="element">The element to construct the repetition from.</param> /// <returns>The repetition node constructed.</returns> public static IRegExNode <TSymbol> Rep1 <TSymbol>(IRegExNode <TSymbol> element) => new RegExRep1Node <TSymbol>(element);
