Vendor dependencies for 0.3.0 release

vendor/bevy_gizmos_macros/src/lib.rs

@@ -0,0 +1,28 @@
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+
+//! Derive implementations for `bevy_gizmos`.
+
+use bevy_macro_utils::BevyManifest;
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, parse_quote, DeriveInput, Path};
+
+/// Implements the [`GizmoConfigGroup`] trait for a gizmo config group type.
+#[proc_macro_derive(GizmoConfigGroup)]
+pub fn derive_gizmo_config_group(input: TokenStream) -> TokenStream {
+    let mut ast = parse_macro_input!(input as DeriveInput);
+    let bevy_gizmos_path: Path = BevyManifest::shared().get_path("bevy_gizmos");
+    let bevy_reflect_path: Path = BevyManifest::shared().get_path("bevy_reflect");
+
+    ast.generics.make_where_clause().predicates.push(
+        parse_quote! { Self: #bevy_reflect_path::Reflect + #bevy_reflect_path::TypePath + Default},
+    );
+
+    let struct_name = &ast.ident;
+    let (impl_generics, type_generics, where_clause) = &ast.generics.split_for_impl();
+
+    TokenStream::from(quote! {
+        impl #impl_generics #bevy_gizmos_path::config::GizmoConfigGroup for #struct_name #type_generics #where_clause {
+        }
+    })
+}