janetrs_macros

A proc-macro crate for JanetRS

Macros

janet_fn

Usage: #[janet_fn] or #[janet_fn(check_mut_ref)]

Macro that tranforms a high-level Janet function (fn(&mut [Janet]) -> Janet) to the thing the Janet C API is expection (fn(i32, *mut janetrs::lowlevel::Janet) -> janetrs::lowlevel::Janet)

The optional arg check_mut_ref adds a check to see if the function received more than one reference to the same *mut pointer. This check is not the default because Janet Types act like types with interior mutability and the check is expensive, but if you want to make sure that your function never receives the same pointer more than once you can use this.