Examples of org.antlr.v4.runtime.RuleContext

org.antlr.v4.runtime.RuleContext
A rule context is a record of a single rule invocation. It knows which context invoked it, if any. If there is no parent context, then naturally the invoking state is not valid. The parent link provides a chain upwards from the current rule invocation to the root of the invocation tree, forming a stack. We actually carry no information about the rule associated with this context (except when parsing). We keep only the state number of the invoking state from the ATN submachine that invoked this. Contrast this with the s pointer inside ParserRuleContext that tracks the current state being "executed" for the current rule. The parent contexts are useful for computing lookahead sets and getting error information. These objects are used during parsing and prediction. For the special case of parsers, we use the subclass ParserRuleContext. @see ParserRuleContext

    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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        .openStream();
    ANTLRInputStream input = new ANTLRInputStream(is);
    MsonLexer lexer = new MsonLexer(input);
//    SymbolASTFactory factory = new SymbolASTFactory();
//    lexer.setTokenFactory(factory);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    
    MsonParser parser = new MsonParser(tokens);
//    parser.setTokenFactory(factory);
    parser.addErrorListener(new DiagnosticErrorListener());
    parser.getInterpreter().setPredictionMode(

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//    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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    ParseTree tree = execStartRule(startRuleName, parser);


    List<String> nodes = new ArrayList<String>();
    for (ParseTree t : XPath.findAll(tree, xpath, parser) ) {
      if ( t instanceof RuleContext) {
        RuleContext r = (RuleContext)t;
        nodes.add(parser.getRuleNames()[r.getRuleIndex()]);
      }
      else {
        TerminalNode token = (TerminalNode)t;
        nodes.add(token.getText());
      }

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  public IntervalSet getExpectedTokens(int stateNumber, @Nullable RuleContext context) {
    if (stateNumber < 0 || stateNumber >= states.size()) {
      throw new IllegalArgumentException("Invalid state number.");
    }


    RuleContext ctx = context;
    ATNState s = states.get(stateNumber);
    IntervalSet following = nextTokens(s);
    if (!following.contains(Token.EPSILON)) {
      return following;
    }

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            this.isCtxDependent = isCtxDependent;
        }


        @Override
        public boolean eval(Recognizer<?,?> parser, RuleContext parserCallStack) {
            RuleContext localctx = isCtxDependent ? parserCallStack : null;
            return parser.sempred(localctx, ruleIndex, predIndex);
        }

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            else if (JAVADOC_WRONG_SINGLETON_TAG.equals(aMsg)) {
                log(lineNumber, JAVADOC_WRONG_SINGLETON_TAG, token.getText());
                throw new ParseCancellationException();
            }
            else {
                final RuleContext ruleContext = aEx.getCtx();
                if (ruleContext != null) {
                    final int ruleIndex = aEx.getCtx().getRuleIndex();
                    final String ruleName = aRecognizer.getRuleNames()[ruleIndex];
                    final String upperCaseRuleName = CaseFormat.UPPER_CAMEL.to(
                            CaseFormat.UPPER_UNDERSCORE, ruleName);

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Related Classes of org.antlr.v4.runtime.RuleContext

org.antlr.runtime.ANTLRFileStream

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

org.antlr.runtime.tree.TreeVisitor

org.antlr.v4.analysis.LeftRecursionDetector

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