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ANTLR Tool Source Code
ANTLR is a powerful parser generator for multiple programming languages including Java.
ANTLR contains 2 major modules:
ANTLR Tool 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/codegen/model/Choice.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.codegen.model; import org.antlr.v4.codegen.OutputModelFactory; import org.antlr.v4.codegen.model.decl.Decl; import org.antlr.v4.codegen.model.decl.TokenTypeDecl; import org.antlr.v4.misc.Utils; import org.antlr.v4.runtime.misc.IntervalSet; import org.antlr.v4.tool.ast.GrammarAST; import java.util.ArrayList; import java.util.List; /** The class hierarchy underneath SrcOp is pretty deep but makes sense that, * for example LL1StarBlock is a kind of LL1Loop which is a kind of Choice. * The problem is it's impossible to figure * out how to construct one of these deeply nested objects because of the * long super constructor call chain. Instead, I decided to in-line all of * this and then look for opportunities to re-factor code into functions. * It makes sense to use a class hierarchy to share data fields, but I don't * think it makes sense to factor code using super constructors because * it has too much work to do. */ public abstract class Choice extends RuleElement { public int decision = -1; public Decl label; @ModelElement public List<CodeBlockForAlt> alts; @ModelElement public List<SrcOp> preamble = new ArrayList<SrcOp>(); public Choice(OutputModelFactory factory, GrammarAST blkOrEbnfRootAST, List<CodeBlockForAlt> alts) { super(factory, blkOrEbnfRootAST); this.alts = alts; } public void addPreambleOp(SrcOp op) { preamble.add(op); } public List<String[]> getAltLookaheadAsStringLists(IntervalSet[] altLookSets) { List<String[]> altLook = new ArrayList<String[]>(); for (IntervalSet s : altLookSets) { altLook.add(factory.getGenerator().getTarget().getTokenTypesAsTargetLabels(factory.getGrammar(), s.toArray())); } return altLook; } public TestSetInline addCodeForLookaheadTempVar(IntervalSet look) { List<SrcOp> testOps = factory.getLL1Test(look, ast); TestSetInline expr = Utils.find(testOps, TestSetInline.class); if (expr != null) { Decl d = new TokenTypeDecl(factory, expr.varName); factory.getCurrentRuleFunction().addLocalDecl(d); CaptureNextTokenType nextType = new CaptureNextTokenType(factory,expr.varName); addPreambleOp(nextType); } return expr; } public ThrowNoViableAlt getThrowNoViableAlt(OutputModelFactory factory, GrammarAST blkAST, IntervalSet expecting) { return new ThrowNoViableAlt(factory, blkAST, expecting); } }
⏎ org/antlr/v4/codegen/model/Choice.java
Or download all of them as a single archive file:
File name: antlr-tool-4.10.1-sources.jar File size: 347718 bytes Release date: 2022-04-15 Download
2022-04-24, 26787👍, 0💬
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