trixy/tests/functions/expected.md

# Host files

File path: `out/dir/api.rs`

```rust
// Host code
/* Rust API */
#[derive(Debug)]
pub enum Commands {
    /// Call out an outstanding person
    #[allow(non_camel_case_types)]
    call_me_back_outstanding { callback: fn(String) -> String },
    One(one::One),
}
pub mod one {
    #[derive(Debug)]
    pub enum One {
        /// Call out a person
        #[allow(non_camel_case_types)]
        call_me_back { callback: fn(u32) },
    }
}
/* C API */
#[no_mangle]
pub extern "C" fn call_me_back_outstanding(
    callback: fn(String) -> String,
) -> core::ffi::c_int {
    callback_function(call_me_back_outstanding);
    return 1;
}
pub mod one_c {}
#[no_mangle]
pub extern "C" fn one_call_me_back(callback: fn(u32)) -> core::ffi::c_int {
    callback_function(one_call_me_back);
    return 1;
}
// vim: filetype=rust
```

# Auxiliary files

File path: `dist/interface.h`

```c
#if !defined TRIXY_MAIN_HEADER
#define TRIXY_MAIN_HEADER

#include "errno.h"
#include "string.h"
#include "vec.h"

/**
 * Call out an outstanding person
 */
extern int
call_me_back_outstanding (const char *(*name) (const char *name)callback);

/**
 * Call out a person
 */
extern int one_call_me_back (void (*name) (uint32_t age) callback);

struct one
{
  int (*call_me_back) ();
};

const struct one one = {
  .call_me_back = one_call_me_back,
};

#endif // if !defined TRIXY_MAIN_HEADER
// vim: filetype=c
```