moving around complete

crates/macro_mize/src/lib.rs

@@ -0,0 +1,68 @@
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{Data, DeriveInput, Fields, parse_macro_input};
+
+#[proc_macro_attribute]
+pub fn mize_part(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(item as DeriveInput);
+    let struct_name = &input.ident;
+
+    // Parse name from attribute
+    let part_name = if !attr.is_empty() {
+        let lit: syn::LitStr = parse_macro_input!(attr);
+        lit.value()
+    } else {
+        struct_name.to_string().to_lowercase()
+    };
+
+    // Verify mize field exists
+    let has_mize = match &input.data {
+        Data::Struct(s) => match &s.fields {
+            Fields::Named(f) => f
+                .named
+                .iter()
+                .any(|field| field.ident.as_ref().map(|i| i == "mize").unwrap_or(false)),
+            _ => false,
+        },
+        _ => false,
+    };
+
+    if !has_mize {
+        return syn::Error::new_spanned(struct_name, "Struct must have a 'mize: Mize' field")
+            .to_compile_error()
+            .into();
+    }
+
+    let expanded = quote! {
+        #input
+
+        // impl the default new impl
+        impl mize::MizePartGenerated for #struct_name {
+            fn name_generated(&self) -> &'static str {
+                #part_name
+            }
+            fn get_mize_generated(&mut self) -> &mut Mize {
+              &mut self.mize
+            }
+            fn as_any_generated(&self) -> &dyn Any {
+              &self
+            }
+            fn as_any_mut_generated(&mut self) -> &dyn Any {
+              &mut self
+            }
+            fn into_any_generated(self: Box<Self>) -> Box<dyn Any> {
+              self
+            }
+        }
+        impl mize::MizePartCreateGenerated for #struct_name {
+            fn create_generated(mize: Mize) -> Self {
+                Self {
+                    mize,
+                    ... Default::default(),
+                }
+            }
+        }
+    };
+
+    TokenStream::from(expanded)
+}