public static string ToString(Operation_T Op)
{
switch (Op)
{
case Operation_T.CREATE_DATABASE:
return("CREATE DATABASE");
case Operation_T.CREATE_TABLE:
return("CREATE TABLE");
case Operation_T.DELETE:
return("DELETE FROM {0} WHERE {1}");
case Operation_T.DROP_TABLE:
return("DROP TABLE {0}");
case Operation_T.INSERT:
return("INSERT INTO {0} [{1}] VALUES ({2})");
case Operation_T.SELECT:
return("SELECT {0} FROM {1}");
case Operation_T.UPDATE:
return("UPDATE {0} SET {1} WHERE {2}");
default:
return("");
}
}
static Arithmetics()
{
MINUS_ONE = (T)System.Convert.ChangeType(-1, typeof(T));
ZERO = (T)System.Convert.ChangeType(0, typeof(T));
ONE = (T)System.Convert.ChangeType(1, typeof(T));
TWO = (T)System.Convert.ChangeType(2, typeof(T));
THREE = (T)System.Convert.ChangeType(3, typeof(T));
DecimalEpsilon = new decimal(1, 0, 0, false, 27);
DecimalPositiveInfinity = 1m / DecimalEpsilon;
DecimalNegativeInfinity = -1m / DecimalEpsilon;
System.Linq.Expressions.ParameterExpression paramA =
System.Linq.Expressions.Expression.Parameter(typeof(T), "a");
System.Linq.Expressions.ParameterExpression paramB =
System.Linq.Expressions.Expression.Parameter(typeof(T), "b");
// Add the parameters together
System.Linq.Expressions.BinaryExpression addBody =
System.Linq.Expressions.Expression.Add(paramA, paramB);
// a-b
System.Linq.Expressions.BinaryExpression subtractBody =
System.Linq.Expressions.Expression.Subtract(paramA, paramB);
// a*b
System.Linq.Expressions.BinaryExpression multiplyBody =
System.Linq.Expressions.Expression.Multiply(paramA, paramB);
// a/b
System.Linq.Expressions.BinaryExpression divideBody =
System.Linq.Expressions.Expression.Divide(paramA, paramB);
// a%b
System.Linq.Expressions.BinaryExpression moduloBody =
System.Linq.Expressions.Expression.Modulo(paramA, paramB);
Add = System.Linq.Expressions.Expression.Lambda <Operation_T>(addBody, paramA, paramB).Compile();
Subtract = System.Linq.Expressions.Expression.Lambda <Operation_T>(subtractBody, paramA, paramB).Compile();
MultiplyInternal = System.Linq.Expressions.Expression.Lambda <Operation_T>(multiplyBody, paramA, paramB).Compile();
Divide = System.Linq.Expressions.Expression.Lambda <Operation_T>(divideBody, paramA, paramB).Compile();
Mod = System.Linq.Expressions.Expression.Lambda <Operation_T>(moduloBody, paramA, paramB).Compile();
}
