public final void exprBITWISE_ANDEx() throws RecognitionException
    {
        Token op = null;
        
        AST ast1 = null, ast2 = null;
        
        try {
            // CPP.g:625:3: (op= '&' exprEQUALITY exprBITWISE_ANDEx | )
            int alt35 = 2;
            int LA35_0 = this.input.LA(1);
            
            if ((LA35_0 == 44)) {
                alt35 = 1;
            }
            else if (((LA35_0 == EOF) || ((LA35_0 >= 23) && (LA35_0 <= 24)) || ((LA35_0 >= 26) && (LA35_0 <= 27))
                    || (LA35_0 == 29) || (LA35_0 == 43) || (LA35_0 == 52) || ((LA35_0 >= 57) && (LA35_0 <= 71)))) {
                alt35 = 2;
            }
            else {
                if (this.state.backtracking > 0) {
                    this.state.failed = true;
                    return;
                }
                NoViableAltException nvae = new NoViableAltException("", 35, 0, this.input);
                
                throw nvae;
            }
            switch (alt35)
            {
                case 1:
                    // CPP.g:625:5: op= '&' exprEQUALITY exprBITWISE_ANDEx
                {
                    if (this.state.backtracking == 0) {
                        ast1 = this.in;
                    }
                    op = (Token) this.match(this.input, 44, FOLLOW_44_in_exprBITWISE_ANDEx2686);
                    if (this.state.failed) {
                        return;
                    }
                    this.pushFollow(FOLLOW_exprEQUALITY_in_exprBITWISE_ANDEx2693);
                    this.exprEQUALITY();
                    
                    this.state._fsp--;
                    if (this.state.failed) {
                        return;
                    }
                    if (this.state.backtracking == 0) {
                        ast2 = this.out;
                        this.out = null;
                    }
                    if (this.state.backtracking == 0) {
                        this.in = new BinExprAST((ExprAST) ast1, BinExprAST.AND, op, (ExprAST) ast2);
                    }
                    this.pushFollow(FOLLOW_exprBITWISE_ANDEx_in_exprBITWISE_ANDEx2707);
                    this.exprBITWISE_ANDEx();
                    
                    this.state._fsp--;
                    if (this.state.failed) {
                        return;
                    }
                    
                }
                    break;
                case 2:
                    // CPP.g:630:5:
                {
                    if (this.state.backtracking == 0) {
                        this.out = this.in;
                    }
                    
                }
                    break;
                
            }
        }
        catch (RecognitionException re) {
            this.reportError(re);
            this.recover(this.input, re);
        } finally {
        }
        return;
    }