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_15

15. Interpreter

Dmitri Nesteruk¹  

(1)

St. Petersburg, Russia

 

The goal of the Interpreter design pattern is, as you may have guessed, to interpret input, particularly textual input – although, to be fair, it really doesn’t matter. The notion of an Interpreter relates directly to Compiler Theory and similar courses taught at universities. Since we don’t have nearly enough space here to delve into the complexities of different types of parsers and whatnot, the purpose of this chapter is to simply show some examples of the kinds of things you might want to interpret.

Here are a few fairly obvious ones:

• Numeric literals such as 42 or 1.234e12 need ...