Interpreter

What problem does it solve?

The Interpreter Pattern provides a clear way to define a language's grammar and an interpreter to evaluate sentences in that language, enabling flexible, domain-specific processing.

Core Features & Use Cases

• Define a small grammar and corresponding AST nodes (Terminal and Nonterminal expressions) to represent phrases.
• Interpret, evaluate, or execute the language constructs within a context, enabling extensible rule engines, configuration DSLs, and simple calculators.
• Use Case: Build a mini query or calculation engine that parses expressions and returns results at runtime.

Quick Start

Parse an expression like "3 + 5 * 2" and interpret it to obtain the numeric result.