This is primarily an interpolation proposal. AFAIK C++ requires explicit formatting (even if it's compile-time verified), and Rust only has extremely restricte

This is primarily an interpolation proposal. AFAIK C++ requires explicit formatting (even if it's compile-time verified), and Rust only has extremely restricted interpolation (you can only interpolate variables, it does not support expressions, and you still have to use formatting macros for interpolation to trigger).