Implement new Concept Exercise: modules

[ErikSchierboom]

This issue describes how to implement the modules concept exercise for the F# track.

Getting started

Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read up on the following documents:

• The features of v3.
• Rationale for v3.
• What are concept exercise and how they are structured?

Please also watch the following video:

• The Anatomy of a Concept Exercise.

Goal

The goal of this exercise is to teach the student the basics of the Concept of Modules in F#.

Learning objectives

• Know what modules are.
• Know how to define a module.
• Know about nested modules.
• Know what namespaces are.
• Know how to import namespaces.
• Know how to use access control to limit access to elements.

Out of scope

• Assemblies.
• Know about recursive modules.

Concepts

The Concepts this exercise unlocks are:

• modules: know what modules are; know how to define a module; know about nested modules; know about recursive modules.
• namespaces: know what namespaces are; know how to import namespaces.
• access-control: know how to use access control to limit access to elements.

Any data types used in this exercise (e.g. strings) should also be added as prerequisites.

Prerequisites

This exercise's prerequisites Concepts are:

• basics: know how to define bindings, know how to use int values.

Resources to refer to

Hints

• Modules: what modules are and how to define them.
• Nested modules: describes nested modules.
• Recursive modules: describes recursive modules.
• Namespaces: what namespaces are and how to define them.
• Imports: how to import modules/namespaces.
• Access control: describes how access control works.

After

• Modules: what modules are and how to define them.
• Nested modules: describes nested modules.
• Recursive modules: describes recursive modules.
• Namespaces: what namespaces are and how to define them.
• Imports: how to import modules/namespaces.
• Access control: describes how access control works.

Representer

This exercise does not require any specific representation logic to be added to the representer.

Analyzer

This exercise does not require any specific logic to be added to the analyzer.

Implementing

To implement this exercise, please follow these instructions.

Help

If you have any questions while implementing the exercise, please post the questions as comments in this issue.