Updated codegen

crates/codegen/src/lib.rs

@@ -4,10 +4,6 @@ pub mod top_level;
 
 use mist_parser::ast::*;
 
-pub fn get_mutable(mutable: bool) -> String {
-    if mutable { "mut " } else { "" }.to_string()
-}
-
 pub struct Context {
     pub expr_ensure_semicolon: bool,
 }
@@ -239,7 +235,13 @@ 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(path) => cg.add(&path.get_rust()),
+            Self::Path(mutable, path) => {
+                if *mutable {
+                    cg.add("mut ");
+                };
+
+                cg.add(&path.get_rust())
+            }
             Self::Literal(lit) => lit.gen_rust(ctx, cg),
 
             Self::Struct(path, ids) => {