/// <summary>
/// Generates a function that performs all type conversions,
/// assuming that the types are correct. Called once per
/// registered function.
/// </summary>
private static Func <Value[], Value> GenerateCall(Type[] parameters, MethodInfo meta)
{
ParameterExpression vs = Expression.Parameter(typeof(Value[]), "vs");
Expression[] casts = new Expression[parameters.Length];
// Convert types after conversion rules, if necessary.
for (int i = 0; i < casts.Length; ++i)
{
Expression v = Expression.ArrayIndex(vs, Expression.Constant(i, typeof(int)));
if (parameters[i].BaseType == TypeConversion.VALUE_T)
{
casts[i] = Expression.Convert(v, parameters[i]);
}
else
{
casts[i] = Expression.Call(v, TypeConversion.FuncalcConversion(parameters[i]));
}
}
Expression call = Expression.Call(meta, casts);
return(Expression.Lambda(call, vs).Compile() as Func <Value[], Value>);
}
