Design Patterns in Modern C++20: Reusable Approaches for Object-Oriented Software Design

© Dmitri Nesteruk 2022

D. NesterukDesign Patterns in Modern C++20https://doi.org/10.1007/978-1-4842-7295-4_6

6. Adapter

Dmitri Nesteruk¹  

(1)

St. Petersburg, Russia

 

I used to travel quite a lot, and a travel adapter which lets me plug a European plug into a UK or US socket¹ is a very good analogy to what’s going on with the Adapter pattern: we are given an interface, but we want a different one, and building an adapter over the interface is what gets us to where we want to be.

Scenario

Here’s a trivial example: suppose you’re working with a library that’s great at drawing pixels. You, on the other hand, work with geometric objects – lines, rectangles, that sort of thing. You want to keep working with those objects but also need the rendering, so you ...