Implement new Concept Exercise: attributes

[ErikSchierboom]

This issue describes how to implement the attributes 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 Attributes in F#.

Learning objectives

• Know what attributes are.
• Know the limitations of attributes.
• Know how to add attributes to values.
• Creating a custom attribute.
• Using the AttributeUsageAttribute to restrict usage.

Out of scope

• Using reflection to read attributes.

Concepts

The Concepts this exercise unlocks are:

• attributes: know what attributes are; know the limitations of attributes; know how to add attributes to values; creating a custom attribute.

Prerequisites

This exercise's prerequisites Concepts are:

• inheritance: know how to inherit from a class.

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

Resources to refer to

Hints

• Attributes: what attributes are and how to use them.
• Attribute usage: reference page for the AttributeUsageAttribute type.

After

• Attributes: what attributes are and how to use them.
• Attribute usage: reference page for the AttributeUsageAttribute type.

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.