Golang — Interpreter Pattern

Introduction

The Interpreter pattern is a behavioral pattern from the Gang of Four (GoF) design patterns that provides a way to evaluate and interpret a language grammar or expression. The pattern defines a language and its grammar, and then provides an interpreter that can interpret the language and execute the grammar. The Interpreter pattern is useful for implementing domain-specific languages and for parsing and interpreting user input.

Example

In Golang, the interpreter pattern can be implemented easily using the combination of interfaces, structs, and functions. Here is a more practical example of how to implement the Interpreter pattern in Golang.

Suppose we have an e-commerce website and we want to provide users with a way to filter products based on certain criteria such as price range, brand, color, etc. We can define a domain-specific language (DSL) to represent these filters and use the Interpreter pattern to parse and execute the DSL.

Let’s define our DSL:

• price represents the price filter
• brand represents the brand filter
• color represents the color filter

Each filter has a specific syntax:

• price:range(min,max) where min and max are integers…