Added a stub objc-foundation-derive crate.

Author: SSheldon

derive/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "objc-foundation-derive"
+version = "0.0.0"
+authors = ["Steven Sheldon"]
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = "0.10.5"
+quote = "0.3.10"

derive/src/lib.rs

@@ -0,0 +1,36 @@
+#![feature(proc_macro, proc_macro_lib)]
+
+extern crate proc_macro;
+extern crate syn;
+#[macro_use]
+extern crate quote;
+
+use proc_macro::TokenStream;
+
+#[proc_macro_derive(INSObject)]
+pub fn impl_object(input: TokenStream) -> TokenStream {
+    // Construct a string representation of the type definition
+    let s = input.to_string();
+
+    // Parse the string representation
+    let ast = syn::parse_macro_input(&s).unwrap();
+
+    // Build the impl
+    let name = &ast.ident;
+    let gen = quote! {
+        unsafe impl ::objc::Message for #name { }
+
+        impl ::objc_foundation::INSObject for #name {
+            fn class() -> &'static ::objc::runtime::Class {
+                let name = stringify!(#name);
+                match ::objc::runtime::Class::get(name) {
+                    Some(cls) => cls,
+                    None => panic!("Class {} not found", name),
+                }
+            }
+        }
+    };
+
+    // Return the generated impl
+    gen.parse().unwrap()
+}