001    package edu.rice.cs.javalanglevels.tree;
002    
003    import edu.rice.cs.javalanglevels.SourceInfo;
004    
005    /**
006     * Class BinaryExpression, a component of the JExpressionIF composite hierarchy.
007     * Note: null is not allowed as a value for any field.
008     * @version  Generated automatically by ASTGen at Sun Mar 04 23:01:28 CST 2012
009     */
010    public abstract class BinaryExpression extends Expression {
011      private final Expression _left;
012      private final Expression _right;
013    
014      /**
015       * Constructs a BinaryExpression.
016       * @throws java.lang.IllegalArgumentException  If any parameter to the constructor is null.
017       */
018      public BinaryExpression(SourceInfo in_sourceInfo, Expression in_left, Expression in_right) {
019        super(in_sourceInfo);
020    
021        if (in_left == null) {
022          throw new java.lang.IllegalArgumentException("Parameter 'left' to the BinaryExpression constructor was null. This class may not have null field values.");
023        }
024        _left = in_left;
025    
026        if (in_right == null) {
027          throw new java.lang.IllegalArgumentException("Parameter 'right' to the BinaryExpression constructor was null. This class may not have null field values.");
028        }
029        _right = in_right;
030      }
031    
032      public Expression getLeft() { return _left; }
033      public Expression getRight() { return _right; }
034    
035      public abstract <RetType> RetType visit(JExpressionIFVisitor<RetType> visitor);
036      public abstract void visit(JExpressionIFVisitor_void visitor);
037      public abstract void outputHelp(TabPrintWriter writer);
038      protected abstract int generateHashCode();
039    }