public virtual void config(ICommandProvider commandProvider)
{
commandProvider.CreateConstant("PI", Math.PI);
commandProvider.CreateConstant("E", Math.E);
//sufix > prefix > binary
commandProvider.CreateOperator("+", OperatorType.Binary, 5000, AssociationType.Left, (x, y) => x + y);
commandProvider.CreateOperator("-", OperatorType.Binary | OperatorType.Prefix, 5000, AssociationType.Left,
(x, y) => (double.IsNaN(x) ? 0 : x) - y
);
commandProvider.CreateOperator("*", OperatorType.Binary, 6000, AssociationType.Left, (x, y) => x * y);
commandProvider.CreateOperator("/", OperatorType.Binary, 6000, AssociationType.Left, (x, y) => x / y);
commandProvider.CreateOperator("%", OperatorType.Binary, 7000, AssociationType.Left, (x, y) => (long)x % (long)y);
commandProvider.CreateOperator("^", OperatorType.Binary, 8000, AssociationType.Right, (x, y) => Math.Pow(x, y));
commandProvider.CreateOperator("!", OperatorType.Prefix | OperatorType.Suffix, 5000, AssociationType.Right,
(x, y) =>
{
if (double.IsNaN(y))
{
double retval = 1;
for (int i = (int)x; i > 0; i--)
retval *= i;
return retval;
}
else
{
return y == 0 ? 1 : 0;
}
});
commandProvider.CreateOperator("=", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x == y ? 1 : 0);
commandProvider.CreateOperator("!=", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x != y ? 1 : 0);
commandProvider.CreateOperator(">", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x > y ? 1 : 0);
commandProvider.CreateOperator(">=", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x >= y ? 1 : 0);
commandProvider.CreateOperator("<", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x < y ? 1 : 0);
commandProvider.CreateOperator("<=", OperatorType.Binary, 4000, AssociationType.Left, (x, y) => x <= y ? 1 : 0);
//functions
commandProvider.CreateFunction("log", args => Math.Log(args[1], args[0]));
commandProvider.CreateFunction("sin", args => Math.Sin(args[0]));
commandProvider.CreateFunction("cos", args => Math.Cos(args[0]));
commandProvider.CreateFunction("tan", args => Math.Tan(args[0]));
commandProvider.CreateFunction("sum", args => args.Sum());
commandProvider.CreateFunction("nan", args => double.NaN);
}