From d88444cd26e29a4cc391d21949a5e22dec25e5c1 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 7 Aug 2021 22:25:06 +0100
Subject: [PATCH] config macros: wip global

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 macros/macros.rs | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/macros/macros.rs b/macros/macros.rs
index 43efcf6..345c756 100644
--- a/macros/macros.rs
+++ b/macros/macros.rs
@@ -45,6 +45,9 @@ use itertools::Itertools;
 ///      }
 ///   }
 /// }
+///
+/// pub struct InstanceConfigCommon {
+/// {
 /// ```
 #[proc_macro_derive(ResolveConfig, attributes(
   limited, server, client, computed, special,
@@ -53,10 +56,18 @@ use itertools::Itertools;
 pub fn resolve(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
   let input = parse_macro_input!(input as DeriveInput);
 
-  let fields = match input.data {
-    Data::Struct(DataStruct { fields: syn::Fields::Named(ref f),.. }) => f,
+  let (fields, top_ident) = match input {
+    DeriveInput {
+      ref ident,
+      data: Data::Struct(DataStruct {
+        fields: syn::Fields::Named(ref f),
+        ..
+      }),
+      ..
+    } => (f, ident),
     _ => panic!(),
   };
+dbg!(&top_ident);
 
   let target = &input.ident;
 
@@ -124,6 +135,9 @@ pub fn resolve(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
   }
   //dbg!(&output);
 
+  let global = syn::Ident::new(&format!("{}Common", top_ident),
+                               top_ident.span());
+
   let output = quote! {
     impl #target {
       const FIELDS: &'static [(&'static str, SectionKindList)]
@@ -137,7 +151,11 @@ pub fn resolve(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
         })
       }
     }
+
+    pub struct #global {
+    }
   };
+
   //eprintln!("{}", &output);
   output.into()
 }
-- 
2.30.2