Implement new Concept Exercise: pointers

[ErikSchierboom]

This issue describes how to implement the pointers concept exercise for the C# 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 advanced aspects of the Concept of Pointers in C#.

Learning objectives

• Know what pointers are.
• Know how to define and use pointer types.
• Know how to use the unsafe keyword and pointer operators.
• Know how to use the fixed keyword.

Out of scope

• Debugging memory leaks.

Concepts

This Concepts Exercise's Concepts are:

• pointers: know what pointers are; know how to define and use pointer types; know how to use the unsafe keyword and pointer operators; know how to use the fixed keyword.

Prequisites

This Concept Exercise's prerequisites Concepts are:

• memory-allocation: know the basics of how memory works in C#, including reference and value type memory and garbage collector aspects.

Resources to refer to

Hints

• Pointer types: introduction to pointer types.
• Unsafe code and pointers: introduction to unsafe code and pointers.
• fixed keyword: how to work with the fixed keyword.
• unsafe keyword: how to work with pointers in an unsafe context

After

• Pointer types: introduction to pointer types.
• Unsafe code and pointers: introduction to unsafe code and pointers.
• fixed keyword: how to work with the fixed keyword.
• unsafe keyword: how to work with pointers in an unsafe context

Representer

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

Analyzer

This exercise does not require any specific analyzer 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.