Some initial work on xml parsing

crates/xml/derive/src/lib.rs

@@ -0,0 +1,18 @@
+use core::panic;
+use syn::{parse_macro_input, DeriveInput};
+
+mod de;
+
+use de::{impl_de_enum, impl_de_struct};
+
+#[proc_macro_derive(XmlDeserialize, attributes(xml))]
+pub fn derive_xml_deserialize(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+
+    match &input.data {
+        syn::Data::Enum(e) => impl_de_enum(&input, e),
+        syn::Data::Struct(s) => impl_de_struct(&input, s),
+        syn::Data::Union(_) => panic!("Union not supported"),
+    }
+    .into()
+}