Refactored mutability

crates/codegen/src/lib.rs

@@ -234,7 +234,6 @@ impl GetRust for TypeExprKind {
 impl GenRust for Pattern {
     fn gen_rust(&self, ctx: &mut Context, cg: &mut RustCodegen) {
         match self {
-            Self::Id(id) => cg.add(&id.get_rust()),
             Self::Path(mutable, path) => {
                 if *mutable {
                     cg.add("mut ");

crates/codegen/src/statement.rs

@@ -158,7 +158,6 @@ impl GenRust for Statement {
             }
 
             Statement::For {
-                mutable,
                 pattern,
                 iterator,
                 body,

crates/codegen/src/top_level.rs

@@ -212,8 +212,7 @@ impl GenRust for (&Vec<Spanned<FieldDeclStmt>>, &Spanned<ClassConstructor>) {
         cg.add_indentedln("}\n");
 
         let mut constructor_params = vec![VarDecl {
-            mutable: false,
-            name: Pattern::Id(Identifier(String::from("self"))),
+            name: Pattern::Path(false, Path(vec![Identifier(String::from("self"))])),
             type_: Some(TypeExpr(
                 TypeExprKind::Path(Path(vec![Identifier(String::from("Self"))])),
                 vec![TypePostfix::RefMut],