Examples with ASTPair antlr.ASTPair used on opensource projects

Example 1 with ASTPair

use of antlr.ASTPair in project hibernate-orm by hibernate.

the class HqlParser method handleIdentifierError.

/**
	 * Overrides the base behavior to retry keywords as identifiers.
	 *
	 * @param token The token.
	 * @param ex The recognition exception.
	 *
	 * @return AST - The new AST.
	 *
	 * @throws antlr.RecognitionException if the substitution was not possible.
	 * @throws antlr.TokenStreamException if the substitution was not possible.
	 */
@Override
public AST handleIdentifierError(Token token, RecognitionException ex) throws RecognitionException, TokenStreamException {
    // If the token can tell us if it could be an identifier...
    if (token instanceof HqlToken) {
        HqlToken hqlToken = (HqlToken) token;
        // a mismatched token error ...
        if (hqlToken.isPossibleID() && (ex instanceof MismatchedTokenException)) {
            MismatchedTokenException mte = (MismatchedTokenException) ex;
            // ... and the expected token type was an identifier, then:
            if (mte.expecting == HqlTokenTypes.IDENT) {
                // Use the token as an identifier.
                reportWarning("Keyword  '" + token.getText() + "' is being interpreted as an identifier due to: " + mte.getMessage());
                // Add the token to the AST.
                ASTPair currentAST = new ASTPair();
                token.setType(HqlTokenTypes.WEIRD_IDENT);
                astFactory.addASTChild(currentAST, astFactory.create(token));
                consume();
                return currentAST.root;
            }
        }
    // if
    }
    // Otherwise, handle the error normally.
    return super.handleIdentifierError(token, ex);
}

Example 2 with ASTPair

use of antlr.ASTPair in project hibernate-orm by hibernate.

the class HqlParser method matchOptionalFrom.

@Override
public void matchOptionalFrom() throws RecognitionException, TokenStreamException {
    returnAST = null;
    ASTPair currentAST = new ASTPair();
    AST optionalFrom_AST = null;
    if (LA(1) == FROM) {
        if (LA(2) != DOT) {
            match(FROM);
            optionalFrom_AST = (AST) currentAST.root;
            returnAST = optionalFrom_AST;
        }
    }
}