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ANTLR Runtime Source Code
ANTLR is a powerful parser generator for multiple programming languages including Java.
ANTLR contains 2 major modules:
ANTLR Runtime Source Code files are provided in the distribution packge (antlr4-4.10.1.zip). You can download them at ANTLR Website.
You can also browse the source code below:
✍: FYIcenter
⏎ org/antlr/v4/runtime/atn/Transition.java
/* * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved. * Use of this file is governed by the BSD 3-clause license that * can be found in the LICENSE.txt file in the project root. */ package org.antlr.v4.runtime.atn; import org.antlr.v4.runtime.misc.IntervalSet; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; /** An ATN transition between any two ATN states. Subclasses define * atom, set, epsilon, action, predicate, rule transitions. * * <p>This is a one way link. It emanates from a state (usually via a list of * transitions) and has a target state.</p> * * <p>Since we never have to change the ATN transitions once we construct it, * we can fix these transitions as specific classes. The DFA transitions * on the other hand need to update the labels as it adds transitions to * the states. We'll use the term Edge for the DFA to distinguish them from * ATN transitions.</p> */ public abstract class Transition { // constants for serialization public static final int EPSILON = 1; public static final int RANGE = 2; public static final int RULE = 3; public static final int PREDICATE = 4; // e.g., {isType(input.LT(1))}? public static final int ATOM = 5; public static final int ACTION = 6; public static final int SET = 7; // ~(A|B) or ~atom, wildcard, which convert to next 2 public static final int NOT_SET = 8; public static final int WILDCARD = 9; public static final int PRECEDENCE = 10; public static final List<String> serializationNames = Collections.unmodifiableList(Arrays.asList( "INVALID", "EPSILON", "RANGE", "RULE", "PREDICATE", "ATOM", "ACTION", "SET", "NOT_SET", "WILDCARD", "PRECEDENCE" )); public static final Map<Class<? extends Transition>, Integer> serializationTypes = Collections.unmodifiableMap(new HashMap<Class<? extends Transition>, Integer>() {{ put(EpsilonTransition.class, EPSILON); put(RangeTransition.class, RANGE); put(RuleTransition.class, RULE); put(PredicateTransition.class, PREDICATE); put(AtomTransition.class, ATOM); put(ActionTransition.class, ACTION); put(SetTransition.class, SET); put(NotSetTransition.class, NOT_SET); put(WildcardTransition.class, WILDCARD); put(PrecedencePredicateTransition.class, PRECEDENCE); }}); /** The target of this transition. */ public ATNState target; protected Transition(ATNState target) { if (target == null) { throw new NullPointerException("target cannot be null."); } this.target = target; } public abstract int getSerializationType(); /** * Determines if the transition is an "epsilon" transition. * * <p>The default implementation returns {@code false}.</p> * * @return {@code true} if traversing this transition in the ATN does not * consume an input symbol; otherwise, {@code false} if traversing this * transition consumes (matches) an input symbol. */ public boolean isEpsilon() { return false; } public IntervalSet label() { return null; } public abstract boolean matches(int symbol, int minVocabSymbol, int maxVocabSymbol); }
⏎ org/antlr/v4/runtime/atn/Transition.java
Or download all of them as a single archive file:
File name: antlr-runtime-4.10.1-sources.jar File size: 308953 bytes Release date: 2022-04-15 Download
⇐ What Is ANTLR Parser Generator
2018-10-21, 30993👍, 0💬
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