retrage/gpt-macro

ChatGPT powered Rust proc macro that generates code at compile-time.

What it solves

This project provides a way to generate Rust code automatically during the compilation process using ChatGPT. It allows developers to fill in incomplete function implementations or generate tests based on a prompt and existing code structure.

How it works

The tool is implemented as a Rust procedural macro. When the compiler encounters a macro like auto_impl!, it sends a prompt and the target code snippet to the OpenAI API. The macro then extracts the completed code from the ChatGPT response and replaces the incomplete target code with the AI-generated implementation before the final compilation continues.

Who it’s for

Rust developers who want to experiment with AI-assisted code generation directly within their source code and build pipeline.

Highlights

  • Compile-time generation: Code is generated and inserted into the binary during the build process.
  • Prompt-driven implementation: Use a string literal as a prompt to tell the AI what the logic should be.
  • Automatic test generation: Includes an #[auto_test] attribute macro for creating tests.
  • OpenAI Integration: Leverages the ChatGPT API via the OPENAI_API_KEY environment variable.

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