New architecture

src/to_artifact.rs

@@ -0,0 +1,25 @@
+use crate::resources::Resource;
+
+pub trait ToArtifact {
+  type Artifact;
+}
+
+macro_rules! to_artifact {
+    ( $($name:ident)* ) => (
+        #[allow(non_snake_case)]
+        impl<$($name: Resource,)*> ToArtifact for ($($name,)*)
+        {
+          type Artifact = ($($name::Artifact,)*);
+        }
+    );
+}
+
+for_each_tuple!(to_artifact);
+
+impl<T: Resource> ToArtifact for Option<T> {
+  type Artifact = Option<T::Artifact>;
+}
+
+impl<T: Resource> ToArtifact for T {
+  type Artifact = T::Artifact;
+}