nint_funcDim defines a functionally dependent dimension.
It shall depend solely on the previous dimensions.
nint_funcDim(x)function(x), where x is the partially realized point in the space.
It shall return an object of type nint_intvDim or a vector.
nint_scatDim returns its argument with the dimension type attribute set to nint_TYPE_FUNC_DIM.
Obviously if x returns an object of type nint_intvDim the dimension is continuous, and discrete otherwise.
As the argument to x is only partially defined the user has to ensure that the function solely depends on values up to the current dimension.