cl-ast: Add filename to File

- Better error reporting
- Better pizza
- Papa Cow's

compiler/cl-ast/src/ast.rs

@@ -34,6 +34,7 @@ pub enum Visibility {
 /// A list of [Item]s
 #[derive(Clone, Debug, Default, PartialEq, Eq, Hash)]
 pub struct File {
+    pub name: &'static str,
     pub items: Vec<Item>,
 }
 

compiler/cl-ast/src/ast_impl/weight_of.rs

@@ -13,8 +13,8 @@ pub trait WeightOf {
 
 impl WeightOf for File {
     fn weight_of(&self) -> usize {
-        let Self { items } = self;
-        items.weight_of()
+        let Self { name, items } = self;
+        name.weight_of() + items.weight_of()
     }
 }
 

compiler/cl-ast/src/ast_visitor/fold.rs

@@ -44,8 +44,8 @@ pub trait Fold {
         s
     }
     fn fold_file(&mut self, f: File) -> File {
-        let File { items } = f;
-        File { items: items.into_iter().map(|i| self.fold_item(i)).collect() }
+        let File { name, items } = f;
+        File { name, items: items.into_iter().map(|i| self.fold_item(i)).collect() }
     }
     fn fold_attrs(&mut self, a: Attrs) -> Attrs {
         let Attrs { meta } = a;

compiler/cl-ast/src/ast_visitor/visit.rs

@@ -26,7 +26,7 @@ pub trait Visit<'a>: Sized {
     fn visit_smuggled_float(&mut self, _f: &'a u64) {}
     fn visit_string(&mut self, _s: &'a str) {}
     fn visit_file(&mut self, f: &'a File) {
-        let File { items } = f;
+        let File { name: _, items } = f;
         items.iter().for_each(|i| self.visit_item(i));
     }
     fn visit_attrs(&mut self, a: &'a Attrs) {