Namespace Reference Evaluation

When the interpreter encounters a namespace reference, it:

1. Switches to the namespace.
2. Evaluates the name.
3. Switches back to the original namespace.

If for example, in the following, the current namespace is #.W, the interpreter evaluates the line:

      A ← X.Y.DUP MAT

in the following way:

1. Evaluate array MAT in current namespace W to produce argument for function.
2. Switch to namespace X.Y within W.
3. Evaluate function DUP in namespace W.X.Y with argument.
4. Switch back to namespace W.
5. Assign variable A in namespace W.