px4_macros 0.2.4

Procedural macros used by the px4 crate
Documentation 
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use proc_macro::TokenStream;
use quote::quote;
use syn::parse_macro_input;

pub fn px4_module_main(args: TokenStream, input: TokenStream) -> TokenStream {
	if !args.is_empty() {
		panic!("px4_module_main does not take any arguments");
	}
	let fndef = parse_macro_input!(input as syn::ItemFn);
	let name = &fndef.ident;
	let expanded = quote! {
		#fndef
		#[no_mangle]
		pub extern "C" fn px4_module_main(argc: u32, argv: *mut *mut u8) -> i32 {
			unsafe { px4::_run(concat!(module_path!(), "\0").as_bytes(), argc, argv, #name) }
		}
	};
	expanded.into()
}