wasmer/src/macros.rs

/// This macro helps to get a function for an instance easily
/// let func: fn(i32) -> i32 = get_instance_function!(instance, func_index);
#[macro_export]
macro_rules! get_instance_function {
    ($instance:expr, $func_index:expr) => {{
        use std::mem;
        let func_addr = $instance.get_function_pointer($func_index);
        unsafe { mem::transmute(func_addr) }
    }};
}

// #[cfg(feature = "debug")]
#[macro_export]
macro_rules! debug {
    ($fmt:expr) => (println!(concat!("Wasmer::", $fmt)));
    ($fmt:expr, $($arg:tt)*) => (println!(concat!("Wasmer::", $fmt, "\n"), $($arg)*));
}