Examples with TerminalAST org.antlr.v4.tool.ast.TerminalAST used on opensource projects

Example 1 with TerminalAST

use of org.antlr.v4.tool.ast.TerminalAST in project antlr4 by tunnelvisionlabs.

the class Grammar method getStringLiterals.

public Set<String> getStringLiterals() {
    final Set<String> strings = new LinkedHashSet<String>();
    GrammarTreeVisitor collector = new GrammarTreeVisitor() {

        @Override
        public void stringRef(TerminalAST ref) {
            strings.add(ref.getText());
        }

        @Override
        public ErrorManager getErrorManager() {
            return tool.errMgr;
        }
    };
    collector.visitGrammar(ast);
    return strings;
}

Example 2 with TerminalAST

use of org.antlr.v4.tool.ast.TerminalAST in project antlr4 by tunnelvisionlabs.

the class LexerATNFactory method stringLiteral.

/**
 * For a lexer, a string is a sequence of char to match.  That is,
 *  "fog" is treated as 'f' 'o' 'g' not as a single transition in
 *  the DFA.  Machine== o-'f'->o-'o'->o-'g'->o and has n+1 states
 *  for n characters.
 */
@Override
public Handle stringLiteral(TerminalAST stringLiteralAST) {
    String chars = stringLiteralAST.getText();
    ATNState left = newState(stringLiteralAST);
    ATNState right;
    String s = CharSupport.getStringFromGrammarStringLiteral(chars);
    if (s == null) {
        // the lexer will already have given an error
        return new Handle(left, left);
    }
    int n = s.length();
    ATNState prev = left;
    right = null;
    for (int i = 0; i < n; ) {
        right = newState(stringLiteralAST);
        int codePoint = s.codePointAt(i);
        prev.addTransition(CodePointTransitions.createWithCodePoint(right, codePoint));
        prev = right;
        i += Character.charCount(codePoint);
    }
    stringLiteralAST.atnState = left;
    return new Handle(left, right);
}

Example 3 with TerminalAST

use of org.antlr.v4.tool.ast.TerminalAST in project antlr4 by tunnelvisionlabs.

the class LexerATNFactory method tokenRef.

@Override
public Handle tokenRef(TerminalAST node) {
    // Ref to EOF in lexer yields char transition on -1
    if (node.getText().equals("EOF")) {
        ATNState left = newState(node);
        ATNState right = newState(node);
        left.addTransition(new AtomTransition(right, IntStream.EOF));
        return new Handle(left, right);
    }
    return _ruleRef(node);
}

Example 4 with TerminalAST

use of org.antlr.v4.tool.ast.TerminalAST in project antlr4 by tunnelvisionlabs.

the class ParserATNFactory method tokenRef.

/**
 * From label {@code A} build graph {@code o-A->o}.
 */
@NotNull
@Override
public Handle tokenRef(@NotNull TerminalAST node) {
    ATNState left = newState(node);
    ATNState right = newState(node);
    int ttype = g.getTokenType(node.getText());
    left.addTransition(new AtomTransition(right, ttype));
    node.atnState = left;
    return new Handle(left, right);
}

Example 5 with TerminalAST

use of org.antlr.v4.tool.ast.TerminalAST in project antlr4 by tunnelvisionlabs.

the class ParserFactory method tokenRef.

@Override
public List<SrcOp> tokenRef(GrammarAST ID, GrammarAST labelAST, GrammarAST args) {
    MatchToken matchOp = new MatchToken(this, (TerminalAST) ID);
    if (labelAST != null) {
        String label = labelAST.getText();
        RuleFunction rf = getCurrentRuleFunction();
        if (labelAST.parent.getType() == ANTLRParser.PLUS_ASSIGN) {
            // add Token _X and List<Token> X decls
            // adds _X
            defineImplicitLabel(ID, matchOp);
            TokenListDecl l = getTokenListLabelDecl(label);
            rf.addContextDecl(ID.getAltLabel(), l);
        } else {
            Decl d = getTokenLabelDecl(label);
            matchOp.labels.add(d);
            rf.addContextDecl(ID.getAltLabel(), d);
        }
    // Decl d = getTokenLabelDecl(label);
    // ((MatchToken)matchOp).labels.add(d);
    // getCurrentRuleFunction().addContextDecl(ID.getAltLabel(), d);
    // if ( labelAST.parent.getType() == ANTLRParser.PLUS_ASSIGN ) {
    // 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);
}