public override string ToString(IDictionary <Type, ExpressionAction> map)
{
var value = base.ToString(map);
if (value == null)
{
var ops = new List <LiteralExpression>(2);
ops.AddRange(Operands.Cast <LiteralExpression>());
// default to infix notation
value = string.Format(@"({1} {0} {2})", Operator, ops[0].ToString(map), ops[1].ToString(map));
}
return(value);
}