Add ZotAPI trait and derive macro.

The idea is to try to generate more of the boilerplate code, but for now
we only do the `z()` method definition. There are also some we're not
quite able to replace yet (like XChanRequest) since it also has life
times.

It's a start anyways :)

2 files changed, 33 insertions, 0 deletions

diff --git a/zotapi-derive/Cargo.toml b/zotapi-derive/Cargo.toml
new file mode 100644
index 0000000..72ece81
--- /dev/null
+++ b/zotapi-derive/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "zotapi-derive"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "1.0", features = ["full"] }
+[lib]
+proc-macro = true
diff --git a/zotapi-derive/src/lib.rs b/zotapi-derive/src/lib.rs
new file mode 100644
index 0000000..ff44c9c
--- /dev/null
+++ b/zotapi-derive/src/lib.rs
@@ -0,0 +1,20 @@
+use proc_macro::{self, TokenStream};
+use quote::*;
+use syn::DeriveInput;
+
+#[proc_macro_derive(ZotAPI)]
+pub fn zotapi_derive(input: TokenStream) -> TokenStream {
+    let ast = syn::parse(input).unwrap();
+    impl_zotapi_derive(&ast)
+}
+
+fn impl_zotapi_derive(ast: &DeriveInput) -> TokenStream {
+    let name = &ast.ident;    // The identifier of the struct we're called for
+    let out_name = format_ident!("{}Request", name);
+
+    let gen = quote! {
+        impl ZotAPI<#out_name> for #name {
+        }
+    };
+    gen.into()
+}