Macro lua_function

macro_rules! lua_function {
    ($l:pat => $body:expr) => { ... };
}

Create an unnamed function that conforms to the signature of CFunction.

The macro accepts the pattern for the State argument, followed by => and the function body. The function is not a closure; it may not capture any variables.

Examples

use lunka::prelude::*;
 
#[unsafe(no_mangle)]
unsafe extern "C-unwind" fn luaopen_mylib(l: *mut LuaState) -> core::ffi::c_int {
	let lua = unsafe { LuaThread::from_ptr(l) };
	lua.new_lib(&lua_library! {
		sqr: lua_function!(l => {
			let lua = LuaThread::from_ptr(l);
			let x = lua.check_number(1);
			lua.push_number(x * x);
			1
		}),
		do_nothing: lua_function!(_ => 0)
	});
	1
}