Implement the Interpreter design pattern for language grammar and runtime evaluation.
npx skills add https://github.com/microwind/ai-skills --skill interpreter
Please help me install this Agent Skill. Skill: Interpreter Source: https://github.com/microwind/ai-skills/tree/main/design-patterns/interpreter-pattern Command: npx skills add https://github.com/microwind/ai-skills --skill interpreter
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.
Parse an expression like "3 + 5 * 2" and interpret it to obtain the numeric result.
High-intent search queries and answers about installing and using this skill.
To implement an interpreter for a domain-specific language, define a grammar using Terminal and Nonterminal expressions that form an AST, then evaluate them within a context. This approach models language constructs to enable flexible runtime processing.
The Interpreter design pattern is used to define a language's grammar and evaluate sentences within that language at runtime. It solves problems requiring extensible rule engines, configuration DSLs, and simple calculators by turning expressions into executable logic.
You can build a rule engine by defining an Expression interface with Terminal and Nonterminal expressions to represent rules. The interpret method evaluates these AST nodes within a shared context to execute the configured logic dynamically.
You should use the Interpreter pattern instead of compiling when you need to evaluate small domain-specific languages or configuration rules dynamically. It is suited for scenarios requiring flexible runtime interpretation rather than complex compiled execution.
To calculate expression strings like "3 + 5 * 2", model the mathematical grammar as Terminal and Nonterminal expressions. The interpreter parses the string into an AST and evaluates the nodes within a context to return the numeric result.
No, you do not need external libraries to model a custom expression parser. The Skill demonstrates how to define the Expression interface, AST nodes, and context management natively to parse and interpret domain-specific logic independently.
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