Working commit

crates/luaffi_impl/src/cdef.rs

@@ -2,7 +2,7 @@ use crate::utils::{ffi_crate, syn_assert, syn_error};
 use darling::FromMeta;
 use proc_macro2::TokenStream;
 use quote::{format_ident, quote};
-use syn::{spanned::*, *};
+use syn::*;
 
 #[derive(Debug, FromMeta)]
 pub struct Args {}

crates/luaffi_impl/src/lib.rs

@@ -5,8 +5,16 @@ use syn::parse_macro_input;
 
 mod cdef;
 mod metatype;
+mod module;
 mod utils;
 
+#[proc_macro_attribute]
+pub fn module(_args: TokenStream1, input: TokenStream1) -> TokenStream1 {
+    module::transform(parse_macro_input!(input))
+        .unwrap_or_else(|err| err.into_compile_error().into_token_stream())
+        .into()
+}
+
 #[proc_macro_attribute]
 pub fn cdef(args: TokenStream1, input: TokenStream1) -> TokenStream1 {
     NestedMeta::parse_meta_list(args.into())
@@ -17,7 +25,7 @@ pub fn cdef(args: TokenStream1, input: TokenStream1) -> TokenStream1 {
 }
 
 #[proc_macro_attribute]
-pub fn metatype(args: TokenStream1, input: TokenStream1) -> TokenStream1 {
+pub fn metatype(_args: TokenStream1, input: TokenStream1) -> TokenStream1 {
     metatype::transform(parse_macro_input!(input))
         .unwrap_or_else(|err| err.into_compile_error().into_token_stream())
         .into()

crates/luaffi_impl/src/metatype.rs

@@ -1,7 +1,7 @@
-use crate::utils::{ffi_crate, is_primitive, is_unit, pat_ident, syn_assert, syn_error, ty_name};
+use crate::utils::{ffi_crate, is_primitive, is_unit, pat_ident, syn_assert, ty_name};
 use proc_macro2::TokenStream;
 use quote::{format_ident, quote};
-use syn::{spanned::*, *};
+use syn::*;
 
 pub fn transform(mut imp: ItemImpl) -> Result<TokenStream> {
     syn_assert!(
@@ -146,7 +146,7 @@ enum FfiArgType {
     Default,
 }
 
-fn get_ffi_arg_type(ty: &Type) -> FfiArgType {
+fn get_ffi_arg_type(_ty: &Type) -> FfiArgType {
     FfiArgType::Default
 }
 

crates/luaffi_impl/src/module.rs

@@ -0,0 +1,26 @@
+use crate::utils::syn_assert;
+use proc_macro2::TokenStream;
+use quote::quote;
+use syn::*;
+
+pub fn transform(func: ItemFn) -> Result<TokenStream> {
+    syn_assert!(
+        func.sig.generics.params.is_empty(),
+        func.sig.generics,
+        "cannot be generic (not yet implemented)"
+    );
+
+    // let impls = generate_impls(&mut imp)?;
+    // let mod_name = format_ident!("__metatype__{}", ty_name(&imp.self_ty)?);
+
+    Ok(quote! {
+        #func
+
+        // #[doc(hidden)]
+        // #[allow(unused, non_snake_case)]
+        // mod #mod_name {
+        //     use super::*;
+        //     #impls
+        // }
+    })
+}

crates/luaffi_impl/src/utils.rs

@@ -1,8 +1,9 @@
 use std::env;
-use syn::{spanned::*, *};
+use syn::*;
 
 macro_rules! syn_error {
     ($src:expr, $($fmt:expr),+) => {{
+        use syn::spanned::*;
         return Err(syn::Error::new($src.span(), format!($($fmt),*)));
     }};
 }
@@ -10,7 +11,7 @@ macro_rules! syn_error {
 macro_rules! syn_assert {
     ($cond:expr, $src:expr, $($fmt:expr),+) => {{
         if !$cond {
-            syn_error!($src, $($fmt),+);
+            crate::utils::syn_error!($src, $($fmt),+);
         }
     }};
 }