Examples of org.antlr.v4.runtime.atn.LexerIndexedCustomAction

org.antlr.v4.codegen.model.Choice
This implementation of {@link LexerAction} is used for tracking input offsetsfor position-dependent actions within a {@link LexerActionExecutor}.
This action is not serialized as part of the ATN, and is only required for position-dependent lexer actions which appear at a location other than the end of a rule. For more information about DFA optimizations employed for lexer actions, see {@link LexerActionExecutor#append} and{@link LexerActionExecutor#fixOffsetBeforeMatch}.
@author Sam Harwell @since 4.2

    if ( !recRuleTemplates.isDefined("recRule") ) {
      tool.errMgr.toolError(ErrorType.MISSING_CODE_GEN_TEMPLATES, "LeftRecursiveRules");
    }


    // use codegen to get correct language templates; that's it though
    CodeGenerator gen = new CodeGenerator(tool, null, language);
    codegenTemplates = gen.getTemplates();
  }

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    blk.ops = ops;
    return blk;
  }


  @Override
  public List<SrcOp> action(ActionAST ast) { return list(new Action(this, ast)); }

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  @Override
  public List<SrcOp> ruleRef(GrammarAST ID, GrammarAST label, GrammarAST args) {
    InvokeRule invokeOp = new InvokeRule(this, ID, label);
    // If no manual label and action refs as token/rule not label, we need to define implicit label
    if ( controller.needsImplicitLabel(ID, invokeOp) ) defineImplicitLabel(ID, invokeOp);
    AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(invokeOp, label);
    return list(invokeOp, listLabelOp);
  }

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//        TokenListDecl l = getTokenListLabelDecl(label);
//        getCurrentRuleFunction().addContextDecl(ID.getAltLabel(), l);
//      }
    }
    if ( controller.needsImplicitLabel(ID, matchOp) ) defineImplicitLabel(ID, matchOp);
    AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(matchOp, labelAST);
    return list(matchOp, listLabelOp);
  }

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        matchOp.labels.add(d);
        rf.addContextDecl(setAST.getAltLabel(), d);
      }
    }
    if ( controller.needsImplicitLabel(setAST, matchOp) ) defineImplicitLabel(setAST, matchOp);
    AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(matchOp, labelAST);
    return list(matchOp, listLabelOp);
  }

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        TokenListDecl l = getTokenListLabelDecl(label);
        getCurrentRuleFunction().addContextDecl(ast.getAltLabel(), l);
      }
    }
    if ( controller.needsImplicitLabel(ast, wild) ) defineImplicitLabel(ast, wild);
    AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(wild, labelAST);
    return list(wild, listLabelOp);
  }

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    // all labels must be in scope struct in case we exec action out of context
    getCurrentRuleFunction().addContextDecl(ast.getAltLabel(), d);
  }


  public AddToLabelList getAddToListOpIfListLabelPresent(LabeledOp op, GrammarAST label) {
    AddToLabelList labelOp = null;
    if ( label!=null && label.parent.getType()==ANTLRParser.PLUS_ASSIGN ) {
      String listLabel = gen.getTarget().getListLabel(label.getText());
      labelOp = new AddToLabelList(this, listLabel, op.getLabels().get(0));
    }
    return labelOp;
  }

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    return new LL1AltBlock(this, blkAST, alts);
  }


  @Override
  public Choice getComplexChoiceBlock(BlockAST blkAST, List<CodeBlockForAlt> alts) {
    return new AltBlock(this, blkAST, alts);
  }

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  }


  @Override
  public Choice getChoiceBlock(BlockAST blkAST, List<CodeBlockForAlt> alts, GrammarAST labelAST) {
    int decision = ((DecisionState)blkAST.atnState).decision;
    Choice c;
    if ( !g.tool.force_atn && AnalysisPipeline.disjoint(g.decisionLOOK.get(decision)) ) {
      c = getLL1ChoiceBlock(blkAST, alts);
    }
    else {
      c = getComplexChoiceBlock(blkAST, alts);

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  @Override
  public Choice getLL1EBNFBlock(GrammarAST ebnfRoot, List<CodeBlockForAlt> alts) {
    int ebnf = 0;
    if ( ebnfRoot!=null ) ebnf = ebnfRoot.getType();
    Choice c = null;
    switch ( ebnf ) {
      case ANTLRParser.OPTIONAL :
        if ( alts.size()==1 ) c = new LL1OptionalBlockSingleAlt(this, ebnfRoot, alts);
        else c = new LL1OptionalBlock(this, ebnfRoot, alts);
        break;

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org.antlr.runtime.ANTLRStringStream

org.antlr.runtime.CharStream

org.antlr.runtime.CommonToken

org.antlr.runtime.Token

org.antlr.runtime.tree.CommonTree

org.antlr.runtime.tree.CommonTreeNodeStream

org.antlr.runtime.tree.Tree

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