Starting to write custom derive for ProgrammingLanguageInterface

schala-codegen/Cargo.toml

@@ -4,6 +4,8 @@ version = "0.1.0"
 authors = ["greg <greg.shuflin@protonmail.com>"]
 
 [dependencies]
+syn = "0.11.11"
+quote = "0.3.15"
 
 [lib]
 proc-macro = true

schala-codegen/src/lib.rs

@@ -1,5 +1,8 @@
 #![feature(proc_macro)]
 extern crate proc_macro;
+#[macro_use]
+extern crate quote;
+extern crate syn;
 use proc_macro::TokenStream;
 
 #[proc_macro]
@@ -7,6 +10,12 @@ pub fn print_a_thing(_input: TokenStream) -> TokenStream {
   "println!(\"Invoked from a proc macro\");".parse().unwrap()
 }
 
+
+#[proc_macro_derive(ProgrammingLanguageInterface)]
+pub fn derive_programming_language_interface(input: TokenStream) -> TokenStream {
+  input
+}
+
 #[cfg(test)]
 mod tests {
     #[test]