Finished up to and including chapter 16

interpreter/src/class.rs

@@ -1,8 +1,8 @@
-use std::collections::HashMap;
 use std::fmt::Display;
 use std::rc::Rc;
 
 use rlox2_frontend::parser::{Expr, Stmt};
+use rustc_hash::FxHashMap;
 
 use crate::{LoxFunction, LoxReference, Value};
 
@@ -12,12 +12,16 @@ pub struct LoxClass {
 
     name: String,
 
-    methods: HashMap<String, Value>,
+    methods: FxHashMap<String, Value>,
 }
 
 /// Representation of a class in Lox. Always behind an Rc to ensure uniqueness. Should never be handled raw.
 impl LoxClass {
-    pub fn new(name: impl Into<String>, methods: HashMap<String, Value>, superclass: Option<Rc<LoxClass>>) -> Rc<Self> {
+    pub fn new(
+        name: impl Into<String>,
+        methods: FxHashMap<String, Value>,
+        superclass: Option<Rc<LoxClass>>,
+    ) -> Rc<Self> {
         let name = name.into();
         let mut methods = methods;
 
@@ -42,7 +46,7 @@ impl LoxClass {
         }
 
         if let Some(ref superclass) = superclass {
-            let mut new_methods: HashMap<String, Value> = HashMap::new();
+            let mut new_methods: FxHashMap<String, Value> = FxHashMap::default();
 
             // Rc<LoxFunction> is immutable, so we need to drain, change, and replace
             for (name, value) in methods {