public object ResolveToConstant(string name, MethodInfo fn, object[] values)
{
Contracts.CheckNonEmpty(name, nameof(name));
Contracts.CheckValue(fn, nameof(fn));
Contracts.CheckParam(Utils.Size(values) > 0, nameof(values), "Expected values to have positive length");
Contracts.CheckParam(!values.All(x => x != null), nameof(values), "Expected values to contain at least one null");
switch (name)
{
case "na":
{
Contracts.Assert(values.Length == 1);
Type type = fn.ReturnType;
if (type == typeof(R4))
{
return(R4.NaN);
}
if (type == typeof(R8))
{
return(R8.NaN);
}
return(null);
}
case "default":
{
Contracts.Assert(values.Length == 1);
Type type = fn.ReturnType;
if (type == typeof(I4))
{
return(default(I4));
}
if (type == typeof(I8))
{
return(default(I8));
}
if (type == typeof(R4))
{
return(default(R4));
}
if (type == typeof(R8))
{
return(default(R8));
}
if (type == typeof(BL))
{
return(default(BL));
}
if (type == typeof(TX))
{
return(default(TX));
}
Contracts.Assert(false, "Unexpected return type!");
return(null);
}
}
// By default, constant NA arguments produce an NA result. Note that this is not true for isna,
// but those functions will get here only if values contains a single null, not an NA.
for (int i = 0; i < values.Length; i++)
{
if (FunctionProviderUtils.IsNA(values[i]))
{
Contracts.Assert(values.Length > 1);
return(FunctionProviderUtils.GetNA(fn.ReturnType));
}
}
return(null);
}
public MethodInfo[] Lookup(string name)
{
switch (name)
{
case "pi":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <R8>(Pi)));
case "na":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(NA),
FunctionProviderUtils.Fn <R8, R8>(NA)));
case "default":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I4>(Default),
FunctionProviderUtils.Fn <I8, I8>(Default),
FunctionProviderUtils.Fn <R4, R4>(Default),
FunctionProviderUtils.Fn <R8, R8>(Default),
FunctionProviderUtils.Fn <BL, BL>(Default),
FunctionProviderUtils.Fn <TX, TX>(Default)));
case "abs":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I4>(Math.Abs),
FunctionProviderUtils.Fn <I8, I8>(Math.Abs),
FunctionProviderUtils.Fn <R4, R4>(Math.Abs),
FunctionProviderUtils.Fn <R8, R8>(Math.Abs)));
case "sign":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I4>(Sign),
FunctionProviderUtils.Fn <I8, I8>(Sign),
FunctionProviderUtils.Fn <R4, R4>(Sign),
FunctionProviderUtils.Fn <R8, R8>(Sign)));
case "exp":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Exp),
FunctionProviderUtils.Fn <R8, R8>(Math.Exp)));
case "ln":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Log),
FunctionProviderUtils.Fn <R8, R8>(Math.Log)));
case "log":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Log),
FunctionProviderUtils.Fn <R8, R8>(Math.Log),
FunctionProviderUtils.Fn <R4, R4, R4>(Log),
FunctionProviderUtils.Fn <R8, R8, R8>(Math.Log)));
case "deg":
case "degrees":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Deg),
FunctionProviderUtils.Fn <R8, R8>(Deg)));
case "rad":
case "radians":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Rad),
FunctionProviderUtils.Fn <R8, R8>(Rad)));
case "sin":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Sin),
FunctionProviderUtils.Fn <R8, R8>(Sin)));
case "sind":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(SinD),
FunctionProviderUtils.Fn <R8, R8>(SinD)));
case "cos":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Cos),
FunctionProviderUtils.Fn <R8, R8>(Cos)));
case "cosd":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(CosD),
FunctionProviderUtils.Fn <R8, R8>(CosD)));
case "tan":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Tan),
FunctionProviderUtils.Fn <R8, R8>(Math.Tan)));
case "tand":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(TanD),
FunctionProviderUtils.Fn <R8, R8>(TanD)));
case "asin":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Asin),
FunctionProviderUtils.Fn <R8, R8>(Math.Asin)));
case "acos":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Acos),
FunctionProviderUtils.Fn <R8, R8>(Math.Acos)));
case "atan":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Atan),
FunctionProviderUtils.Fn <R8, R8>(Math.Atan)));
case "atan2":
case "atanyx":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4, R4>(Atan2),
FunctionProviderUtils.Fn <R8, R8, R8>(Atan2)));
case "sinh":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Sinh),
FunctionProviderUtils.Fn <R8, R8>(Math.Sinh)));
case "cosh":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Cosh),
FunctionProviderUtils.Fn <R8, R8>(Math.Cosh)));
case "tanh":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Tanh),
FunctionProviderUtils.Fn <R8, R8>(Math.Tanh)));
case "sqrt":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Sqrt),
FunctionProviderUtils.Fn <R8, R8>(Math.Sqrt)));
case "trunc":
case "truncate":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Truncate),
FunctionProviderUtils.Fn <R8, R8>(Math.Truncate)));
case "floor":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Floor),
FunctionProviderUtils.Fn <R8, R8>(Math.Floor)));
case "ceil":
case "ceiling":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Ceiling),
FunctionProviderUtils.Fn <R8, R8>(Math.Ceiling)));
case "round":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, R4>(Round),
FunctionProviderUtils.Fn <R8, R8>(Math.Round)));
case "min":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I4, I4>(Math.Min),
FunctionProviderUtils.Fn <I8, I8, I8>(Math.Min),
FunctionProviderUtils.Fn <R4, R4, R4>(Math.Min),
FunctionProviderUtils.Fn <R8, R8, R8>(Math.Min)));
case "max":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I4, I4>(Math.Max),
FunctionProviderUtils.Fn <I8, I8, I8>(Math.Max),
FunctionProviderUtils.Fn <R4, R4, R4>(Math.Max),
FunctionProviderUtils.Fn <R8, R8, R8>(Math.Max)));
case "len":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, I4>(Len)));
case "lower":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, TX>(Lower)));
case "upper":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, TX>(Upper)));
case "right":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, I4, TX>(Right)));
case "left":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, I4, TX>(Left)));
case "mid":
return(FunctionProviderUtils.Ret(FunctionProviderUtils.Fn <TX, I4, I4, TX>(Mid)));
case "concat":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <TX>(Empty),
Id <TX>(),
FunctionProviderUtils.Fn <TX, TX, TX>(Concat),
FunctionProviderUtils.Fn <TX, TX, TX, TX>(Concat),
FunctionProviderUtils.Fn <TX[], TX>(Concat)));
case "isna":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <R4, BL>(IsNA),
FunctionProviderUtils.Fn <R8, BL>(IsNA)));
case "bool":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <TX, BL>(ToBL),
Id <BL>()));
case "int":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I8, I4>(Convert.ToInt32),
FunctionProviderUtils.Fn <R4, I4>(Convert.ToInt32),
FunctionProviderUtils.Fn <R8, I4>(Convert.ToInt32),
FunctionProviderUtils.Fn <BL, I4>(Convert.ToInt32),
FunctionProviderUtils.Fn <TX, I4>(ToI4),
Id <I4>()));
case "long":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, I8>(Convert.ToInt64),
FunctionProviderUtils.Fn <R4, I8>(Convert.ToInt64),
FunctionProviderUtils.Fn <R8, I8>(Convert.ToInt64),
FunctionProviderUtils.Fn <BL, I8>(Convert.ToInt64),
FunctionProviderUtils.Fn <TX, I8>(ToI8),
Id <I8>()));
case "float":
case "single":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, R4>(Convert.ToSingle),
FunctionProviderUtils.Fn <I8, R4>(Convert.ToSingle),
FunctionProviderUtils.Fn <R4, R4>(ToR4),
FunctionProviderUtils.Fn <R8, R4>(ToR4),
FunctionProviderUtils.Fn <BL, R4>(Convert.ToSingle),
FunctionProviderUtils.Fn <TX, R4>(ToR4)));
case "double":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, R8>(Convert.ToDouble),
FunctionProviderUtils.Fn <I8, R8>(Convert.ToDouble),
FunctionProviderUtils.Fn <R4, R8>(ToR8),
FunctionProviderUtils.Fn <R8, R8>(ToR8),
FunctionProviderUtils.Fn <BL, R8>(Convert.ToDouble),
FunctionProviderUtils.Fn <TX, R8>(ToR8)));
case "text":
return(FunctionProviderUtils.Ret(
FunctionProviderUtils.Fn <I4, TX>(ToTX),
FunctionProviderUtils.Fn <I8, TX>(ToTX),
FunctionProviderUtils.Fn <R4, TX>(ToTX),
FunctionProviderUtils.Fn <R8, TX>(ToTX),
FunctionProviderUtils.Fn <BL, TX>(ToTX),
Id <TX>()));
}
return(null);
}