Examples of org.antlr.v4.runtime.ParserRuleContext

org.antlr.v4.runtime.ParserRuleContext
A rule invocation record for parsing. Contains all of the information about the current rule not stored in the RuleContext. It handles parse tree children list, Any ATN state tracing, and the default values available for rule indications: start, stop, rule index, current alt number, current ATN state. Subclasses made for each rule and grammar track the parameters, return values, locals, and labels specific to that rule. These are the objects that are returned from rules. Note text is not an actual field of a rule return value; it is computed from start and stop using the input stream's toString() method. I could add a ctor to this so that we can pass in and store the input stream, but I'm not sure we want to do that. It would seem to be undefined to get the .text property anyway if the rule matches tokens from multiple input streams. I do not use getters for fields of objects that are used simply to group values such as this aggregate. The getters/setters are there to satisfy the superclass interface.

//    lexer.setTokenFactory(factory);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    
    MsonParser parser = new MsonParser(tokens);
//    parser.setTokenFactory(factory);
    parser.addErrorListener(new DiagnosticErrorListener());
    parser.getInterpreter().setPredictionMode(
        PredictionMode.LL_EXACT_AMBIG_DETECTION);
    parser.setBuildParseTree(true);
    ParseTree tree = parser.mson();
    // show tree in text form

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    ClassUtils cu = new ClassUtils();
    setup(cu);
    registry.clearForType(JavaCompletionTypes.CUSTOM_TYPE);
    registry.clearForType(JavaCompletionTypes.FIELD);
    registry.clearForType(JavaCompletionTypes.NAME);
    Lexer lexer = new JavaLexer(new ANTLRInputStream(txt));
    CommonTokenStream tokens = new CommonTokenStream(lexer);


    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();

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    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();
    
    // start parsing at the compilationUnit rule
    ParserRuleContext t = parser.compilationUnit();
    ParseTreeWalker walker = new ParseTreeWalker();
    List<AutocompleteCandidate> q = new ArrayList<AutocompleteCandidate>();
          
    ImportDeclarationCompletion extractor = new ImportDeclarationCompletion(txt,cur,registry,cps,cu);
    NameBuilder extractor2 = new NameBuilder(registry,cu );

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    isKeywords = false;
  }


  @Override
  public void enterPackage(@NotNull PackageContext ctx) {
    ParserRuleContext prc = ctx.getParent();
    if (!(prc instanceof DomainArrayContext)) {
      return;
    }
    DomainArrayContext dac = (DomainArrayContext) prc;
    DomainHeaderContext dhctx = (DomainHeaderContext) dac.getChild(0);

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      parser.setInputStream(tokens);
      Rule r = g.rules.get(startRule);
      if ( r==null ) {
        return parser.getParseInfo().getDecisionInfo();
      }
      ParserRuleContext t = parser.parse(r.index);
//      try {
//        Utils.waitForClose(t.inspect(parser).get());
//      }
//      catch (Exception e) {
//        e.printStackTrace();

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      parser.setTokenStream(tokens);
      parser.setTrace(trace);


      try {
        Method startRule = parserClass.getMethod(startRuleName);
        ParserRuleContext tree = (ParserRuleContext)startRule.invoke(parser, (Object[])null);


        if ( printTree ) {
          System.out.println(tree.toStringTree(parser));
        }
        if ( gui ) {
          tree.inspect(parser);
        }
        if ( psFile!=null ) {
          tree.save(parser, psFile); // Generate postscript
        }
      }
      catch (NoSuchMethodException nsme) {
        System.err.println("No method for rule "+startRuleName+" or it has arguments");
      }

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    if ( findTokens && t instanceof TerminalNode ) {
      TerminalNode tnode = (TerminalNode)t;
      if ( tnode.getSymbol().getType()==index ) nodes.add(t);
    }
    else if ( !findTokens && t instanceof ParserRuleContext ) {
      ParserRuleContext ctx = (ParserRuleContext)t;
      if ( ctx.getRuleIndex() == index ) nodes.add(t);
    }
    // check children
    for (int i = 0; i < t.getChildCount(); i++){
      _findAllNodes(t.getChild(i), index, findTokens, nodes);
    }

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   * {@link ParseTreeListener#enterEveryRule} and a
   * {@link RuleContext}-specific event. First we trigger the generic and then
   * the rule specific. We to them in reverse order upon finishing the node.
   */
    protected void enterRule(ParseTreeListener listener, RuleNode r) {
    ParserRuleContext ctx = (ParserRuleContext)r.getRuleContext();
    listener.enterEveryRule(ctx);
    ctx.enterRule(listener);
    }

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    listener.enterEveryRule(ctx);
    ctx.enterRule(listener);
    }


    protected void exitRule(ParseTreeListener listener, RuleNode r) {
    ParserRuleContext ctx = (ParserRuleContext)r.getRuleContext();
    ctx.exitRule(listener);
    listener.exitEveryRule(ctx);
    }

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      return mismatchedNode;
    }


    if ( tree instanceof ParserRuleContext && patternTree instanceof ParserRuleContext ) {
      ParserRuleContext r1 = (ParserRuleContext)tree;
      ParserRuleContext r2 = (ParserRuleContext)patternTree;
      ParseTree mismatchedNode = null;
      // (expr ...) and <expr>
      RuleTagToken ruleTagToken = getRuleTagToken(r2);
      if ( ruleTagToken!=null ) {
        ParseTreeMatch m = null;
        if ( r1.getRuleContext().getRuleIndex() == r2.getRuleContext().getRuleIndex() ) {
          // track label->list-of-nodes for both rule name and label (if any)
          labels.map(ruleTagToken.getRuleName(), tree);
          if ( ruleTagToken.getLabel()!=null ) {
            labels.map(ruleTagToken.getLabel(), tree);
          }
        }
        else {
          if (mismatchedNode == null) {
            mismatchedNode = r1;
          }
        }


        return mismatchedNode;
      }


      // (expr ...) and (expr ...)
      if ( r1.getChildCount()!=r2.getChildCount() ) {
        if (mismatchedNode == null) {
          mismatchedNode = r1;
        }


        return mismatchedNode;

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