Package icyllis.arc3d.compiler.lex

Interface RegexNode

All Known Implementing Classes:
RegexNode.Char, RegexNode.CharClass, RegexNode.Range
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface RegexNode
Represents a node in the parse tree of a regular expression.

  • Method Details

    • transition

      @Unmodifiable it.unimi.dsi.fastutil.ints.IntList transition(NFA nfa, @Unmodifiable it.unimi.dsi.fastutil.ints.IntList next)
      Creates NFA states for this node, with a successful match against this node resulting in a transition next all the states in the next list.

    • Char

      @Nonnull static RegexNode Char(char c)
      Match a character.

    • Range

      @Nonnull static RegexNode Range(char start, char end)
      Match a character range.

    • Range

      @Nonnull static RegexNode Range(RegexNode start, RegexNode end)
      Match a character range.

    • CharClass

      @Nonnull static RegexNode CharClass(RegexNode... clazz)
      Match a character class.

    • CharClass

      @Nonnull static RegexNode CharClass(RegexNode[] clazz, boolean exclusive)
      Match a character class.

    • Concat

      @Nonnull @Contract(pure=true) static RegexNode Concat(RegexNode x, RegexNode y)
      Concatenation: XY (X -> Y -> Next)

    • Union

      @Nonnull @Contract(pure=true) static RegexNode Union(RegexNode x, RegexNode y)
      Alternation: X|Y (X -> Next, Y -> Next)

    • Dot

      @Nonnull @Contract(pure=true) static RegexNode Dot()
      Wildcard, excluding LF and CR.

    • Star

      @Nonnull @Contract(pure=true) static RegexNode Star(RegexNode x)
      Kleene closure: X -> X, X -> Next, Next -> Next. Match between zero, one and unlimited times.

    • Plus

      @Nonnull @Contract(pure=true) static RegexNode Plus(RegexNode x)
      X -> X, X -> Next. Match between one and unlimited times.

    • Ques

      @Nonnull @Contract(pure=true) static RegexNode Ques(RegexNode x)
      X -> Next, Next -> Next. Match between zero and one times.