diff --git a/crates/auto-registry/Cargo.lock b/crates/auto-registry/Cargo.lock
new file mode 100644
index 0000000..a5cb56e
--- /dev/null
+++ b/crates/auto-registry/Cargo.lock
@@ -0,0 +1,54 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "auto-registry"
+version = "0.0.4"
+dependencies = [
+ "lazy_static",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/crates/auto-registry/Cargo.toml b/crates/auto-registry/Cargo.toml
new file mode 100644
index 0000000..fcf8751
--- /dev/null
+++ b/crates/auto-registry/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "auto-registry"
+version = "0.0.4"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = { version = "1.0"}
+quote = "1.0"
+syn = { version = "1.0", features = [ "full" ] }
+lazy_static = "1.5.0"
diff --git a/crates/auto-registry/src/lib.rs b/crates/auto-registry/src/lib.rs
new file mode 100644
index 0000000..5a9196a
--- /dev/null
+++ b/crates/auto-registry/src/lib.rs
@@ -0,0 +1,267 @@
+#![feature(proc_macro_span)]
+use std::cell::RefCell;
+use std::collections::HashMap;
+
+use lazy_static::lazy_static;
+use proc_macro::TokenStream;
+use quote::quote;
+use std::sync::Mutex;
+use syn::parse::Parse;
+use syn::parse::ParseStream;
+use syn::parse_macro_input;
+use syn::ItemStruct;
+
+lazy_static! {
+ /// The registry, each key corresponds to an identifier that needs to be
+ /// valid in the context of the [`genegenerate_registry`] macro.
+ static ref REGISTRY: Mutex<RefCell<HashMap<String, Vec<String>>>> =
+ Mutex::new(RefCell::new(HashMap::new()));
+}
+
+/// Arguments for the [`auto_registry`] proc macro
+struct AutoRegistryArgs {
+ /// The registry name
+ registry: syn::LitStr,
+ /// The absolute path to the struct, if not specified the macro will try
+ /// to automatically infer the full path.
+ path: Option<syn::LitStr>,
+}
+
+/// Parser for [`AutoRegistryArgs`]
+impl Parse for AutoRegistryArgs {
+ fn parse(input: ParseStream) -> syn::Result<Self> {
+ let mut registry = None;
+ let mut path = None;
+ loop {
+ let key: syn::Ident = input.parse()?;
+ input.parse::<syn::Token![=]>()?;
+ let value: syn::LitStr = input.parse()?;
+
+ match key.to_string().as_str() {
+ "registry" => registry = Some(value),
+ "path" => path = Some(value),
+ _ => {
+ return Err(syn::Error::new(
+ key.span(),
+ format!(
+ "Unknown attribute `{}`, excepted `registry` or `path`",
+ key.to_string()
+ ),
+ ))
+ }
+ }
+ if input.is_empty() {
+ break;
+ }
+ input.parse::<syn::Token![,]>()?;
+ }
+
+ if registry.is_none() {
+ return Err(syn::Error::new(
+ input.span(),
+ "Missing required attribute `registry`".to_string(),
+ ));
+ }
+
+ Ok(AutoRegistryArgs {
+ registry: registry.unwrap(),
+ path,
+ })
+ }
+}
+
+/// The proc macro used on a struct to add it to the registry
+///
+/// # Attributes
+/// - registry: (String) Name of the registry to collect the struct into
+/// - path: (Optional String) The crate path in which the struct is located
+/// If left empty, the path will be try to be automatically-deduced
+#[proc_macro_attribute]
+pub fn auto_registry(attr: TokenStream, input: TokenStream) -> TokenStream {
+ let args = parse_macro_input!(attr as AutoRegistryArgs);
+ let input = parse_macro_input!(input as ItemStruct);
+
+ let ident = &input.ident;
+
+ let path = if let Some(path) = args.path {
+ format!("{}::{}", path.value(), ident.to_string().as_str())
+ } else {
+ // Attempt to get the path in a hacky way in case the path wasn't
+ // specified as an attribute to the macro
+ let path = match input
+ .ident
+ .span()
+ .unwrap()
+ .source_file()
+ .path()
+ .canonicalize()
+ {
+ Ok(path) => path,
+ Err(e) => {
+ return syn::Error::new(
+ input.ident.span(),
+ format!("Failed to canonicalize path: {}", e),
+ )
+ .to_compile_error()
+ .into();
+ }
+ };
+
+ let crate_path = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+ let relative_path = path.strip_prefix(&crate_path).unwrap();
+ let relative_path_str = relative_path.to_string_lossy();
+ // Remove the first path component e.g "src/"
+ let pos = if let Some(pos) = relative_path_str.find("/") {
+ pos + 1
+ } else {
+ 0
+ };
+
+ let module_path = relative_path_str
+ .split_at(pos)
+ .1
+ .strip_suffix(".rs")
+ .unwrap()
+ .replace("/", "::");
+
+ if module_path.is_empty() {
+ format!("crate::{}", ident.to_string())
+ } else {
+ format!("crate::{module_path}::{}", ident.to_string())
+ }
+ };
+
+ let reg_mtx = REGISTRY.lock().unwrap();
+ let mut reg_borrow = reg_mtx.borrow_mut();
+ if let Some(ref mut vec) = reg_borrow.get_mut(args.registry.value().as_str()) {
+ vec.push(path);
+ } else {
+ reg_borrow.insert(args.registry.value(), vec![path]);
+ }
+
+ quote! {
+ #input
+ }
+ .into()
+}
+
+/// Arguments for the [`generate_registry`] proc macro
+struct GenerateRegistryArgs {
+ /// The registry name
+ registry: syn::LitStr,
+ /// The target, i.e the generated function name
+ target: syn::Ident,
+ /// The maker macro, takes all constructed items and processes them
+ maker: syn::Expr,
+ /// The return type for the function
+ return_type: syn::Type,
+}
+
+/// Parser for [`GenerateRegistryArgs`]
+impl Parse for GenerateRegistryArgs {
+ fn parse(input: ParseStream) -> syn::Result<Self> {
+ let mut registry = None;
+ let mut target = None;
+ let mut maker = None;
+ let mut return_type = None;
+ loop {
+ let key: syn::Ident = input.parse()?;
+ input.parse::<syn::Token![=]>()?;
+
+ match key.to_string().as_str() {
+ "registry" => registry = Some(input.parse()?),
+ "target" => target = Some(input.parse()?),
+ "maker" => maker = Some(input.parse()?),
+ "return_type" => return_type = Some(input.parse()?),
+ _ => {
+ return Err(syn::Error::new(
+ key.span(),
+ format!(
+ "Unknown attribute `{}`, excepted `registry` or `target`",
+ key.to_string()
+ ),
+ ))
+ }
+ }
+ if input.is_empty() {
+ break;
+ }
+ input.parse::<syn::Token![,]>()?;
+ }
+
+ if registry.is_none() {
+ return Err(syn::Error::new(
+ input.span(),
+ "Missing required attribute `registry`".to_string(),
+ ));
+ } else if target.is_none() {
+ return Err(syn::Error::new(
+ input.span(),
+ "Missing required attribute `target`".to_string(),
+ ));
+ } else if maker.is_none() {
+ return Err(syn::Error::new(
+ input.span(),
+ "Missing required attribute `maker`".to_string(),
+ ));
+ } else if return_type.is_none() {
+ return Err(syn::Error::new(
+ input.span(),
+ "Missing required attribute `return_type`".to_string(),
+ ));
+ }
+
+ Ok(GenerateRegistryArgs {
+ registry: registry.unwrap(),
+ target: target.unwrap(),
+ maker: maker.unwrap(),
+ return_type: return_type.unwrap(),
+ })
+ }
+}
+
+/// The proc macro that generates the function to build the registry
+///
+/// # Attributes
+/// - registry: (String) Name of the registry to generate
+/// - target: (Identifier) Name of the resulting function
+/// - maker: (Macro) A macro that will take all the newly constructed objects
+/// comma-separated and create the resulting expression
+/// - return_type: (Type) The return type of the generated function.
+/// Must match the type of the macro invocation
+#[proc_macro_attribute]
+pub fn generate_registry(attr: TokenStream, input: TokenStream) -> TokenStream {
+ let args = parse_macro_input!(attr as GenerateRegistryArgs);
+ let reg_mtx = REGISTRY.lock().unwrap();
+
+ let mut stream = proc_macro2::TokenStream::new();
+ if let Some(names) = reg_mtx.borrow().get(args.registry.value().as_str()) {
+ for name in names {
+ let struct_name: proc_macro2::TokenStream = name.parse().unwrap();
+ stream.extend(quote::quote_spanned!(proc_macro2::Span::call_site() =>
+ #struct_name::new(),
+ ));
+ }
+ } else {
+ panic!(
+ "Unable to find registry item with key=`{}`",
+ args.registry.value()
+ );
+ }
+
+ let function = args.target;
+ //proc_macro2::Ident::new(args.target.value().as_str(), proc_macro2::Span::call_site());
+ let return_type = args.return_type;
+ let maker = args.maker;
+
+ let rest: proc_macro2::TokenStream = input.into();
+ quote! {
+ fn #function() -> #return_type {
+ #maker!(
+ #stream
+ )
+ }
+ #rest
+ }
+ .into()
+}