public override object Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
{
object obj2;
ArithmeticLiteral literal;
ArithmeticLiteral literal2;
Literal literal3;
Literal literal4;
if (this.lhsRootType == null)
{
this.lhsRootType = Enum.GetUnderlyingType(this.lhsBaseType);
}
if (this.rhsRootType == null)
{
this.rhsRootType = Enum.GetUnderlyingType(this.rhsBaseType);
}
switch (this.op)
{
case CodeBinaryOperatorType.Add:
if ((parameters[0] != null) && (parameters[1] != null))
{
literal = ArithmeticLiteral.MakeLiteral(this.lhsRootType, parameters[0]);
literal2 = ArithmeticLiteral.MakeLiteral(this.rhsRootType, parameters[1]);
obj2 = literal.Add(literal2);
obj2 = Executor.AdjustType(obj2.GetType(), obj2, this.resultBaseType);
if (this.resultIsNullable)
{
obj2 = Activator.CreateInstance(this.resultType, new object[] { obj2 });
}
return(obj2);
}
return(null);
case CodeBinaryOperatorType.Subtract:
if ((parameters[0] != null) && (parameters[1] != null))
{
literal = ArithmeticLiteral.MakeLiteral(this.resultRootType, Executor.AdjustType(this.lhsRootType, parameters[0], this.resultRootType));
literal2 = ArithmeticLiteral.MakeLiteral(this.resultRootType, Executor.AdjustType(this.rhsRootType, parameters[1], this.resultRootType));
obj2 = literal.Subtract(literal2);
obj2 = Executor.AdjustType(obj2.GetType(), obj2, this.resultBaseType);
if (this.resultIsNullable)
{
obj2 = Activator.CreateInstance(this.resultType, new object[] { obj2 });
}
return(obj2);
}
return(null);
case CodeBinaryOperatorType.ValueEquality:
literal3 = Literal.MakeLiteral(this.lhsRootType, parameters[0]);
literal4 = Literal.MakeLiteral(this.rhsRootType, parameters[1]);
return(literal3.Equal(literal4));
case CodeBinaryOperatorType.LessThan:
literal3 = Literal.MakeLiteral(this.lhsRootType, parameters[0]);
literal4 = Literal.MakeLiteral(this.rhsRootType, parameters[1]);
return(literal3.LessThan(literal4));
case CodeBinaryOperatorType.LessThanOrEqual:
literal3 = Literal.MakeLiteral(this.lhsRootType, parameters[0]);
literal4 = Literal.MakeLiteral(this.rhsRootType, parameters[1]);
return(literal3.LessThanOrEqual(literal4));
case CodeBinaryOperatorType.GreaterThan:
literal3 = Literal.MakeLiteral(this.lhsRootType, parameters[0]);
literal4 = Literal.MakeLiteral(this.rhsRootType, parameters[1]);
return(literal3.GreaterThan(literal4));
case CodeBinaryOperatorType.GreaterThanOrEqual:
literal3 = Literal.MakeLiteral(this.lhsRootType, parameters[0]);
literal4 = Literal.MakeLiteral(this.rhsRootType, parameters[1]);
return(literal3.GreaterThanOrEqual(literal4));
}
throw new RuleEvaluationException(string.Format(CultureInfo.CurrentCulture, Messages.BinaryOpNotSupported, new object[] { this.op.ToString() }));
}