Lean 4 FFI Bindings

About

This skill provides standardized implementation patterns for creating Foreign Function Interface (FFI) bindings between Lean 4 and C. It guides developers through the complexities of defining opaque types, managing native memory, and registering external classes for Lean's garbage collector. By offering pre-built patterns for data conversion—including tuples, arrays, and floating-point values—it simplifies the process of building high-performance applications that require low-level system access, such as GPU rendering, database drivers, or network protocols.

Key Features

• Template build configurations for Lake and Clang integration
• Type-safe opaque handle definitions for native pointers
• Comprehensive data marshalling for Lean primitives and complex types
• 0 GitHub stars
• Automated garbage collection integration using external class registration
• Standardized IO result and error handling patterns in C

Use Cases

• Accessing low-level system calls and OS-specific APIs for terminal or hardware control
• Integrating high-performance graphics APIs like Metal or Vulkan into Lean projects
• Creating Lean wrappers for existing C libraries such as SQLite, gRPC, or OpenSSL