Rust Function Overloading - Call for Experimentation

The Rust Project is currently experimenting with function overloading for foreign function interface (FFI) bindings in partnership with the Rust Foundation's Rust-C++ Interop Initiative. This experiment allows for more intuitive function calls using a new feature called "splat" in Rust nightly builds. With splat, overloaded functions can be called with separate arguments rather than being passed as a single tuple argument, as was previously required.

This change makes the syntax more ergonomic and easier to understand. While type inference and type checking remain consistent with stable Rust overloads, the implementation complexity is still being explored as part of the experimental stage. The Rust Project encourages compiler and interop tool developers to experiment with this feature, as it aims to support a wide range of programming languages for FFI bindings.

The experiment has been ongoing since July 31, 2026, and the Rust Project values feedback from the community, especially from compiler and interop tool developers. This feature is in an unstable stage and may change or be removed at any time. The Rust Foundation's support for the Rust-C++ Interop Initiative, provided by Google, has been crucial in making this experiment possible.