From 21a58ffb202531d6ac74702648ad1c168f279a6d Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Sun, 18 Apr 2021 17:25:03 -0700
Subject: 12.5 This

---
 src/com/craftinginterpreters/lox/Resolver.java | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/com/craftinginterpreters/lox/Resolver.java')

diff --git a/src/com/craftinginterpreters/lox/Resolver.java b/src/com/craftinginterpreters/lox/Resolver.java
index 649235a..f68e4dc 100644
--- a/src/com/craftinginterpreters/lox/Resolver.java
+++ b/src/com/craftinginterpreters/lox/Resolver.java
@@ -37,11 +37,16 @@ class Resolver implements Expr.Visitor<Void>, Stmt.Visitor<Void> {
         declare(stmt.name);
         define(stmt.name);
 
+        beginScope();
+        scopes.peek().put("this", true);
+
         for (Stmt.Function method : stmt.methods) {
             FunctionType declaration = FunctionType.METHOD;
             resolveFunction(method, declaration);
         }
 
+        endScope();
+
         return null;
     }
 
@@ -154,6 +159,12 @@ class Resolver implements Expr.Visitor<Void>, Stmt.Visitor<Void> {
         return null;
     }
 
+    @Override
+    public Void visitThisExpr(Expr.This expr) {
+        resolveLocal(expr, expr.keyword);
+        return null;
+    }
+
     @Override
     public Void visitLogicalExpr(Expr.Logical expr) {
         resolve(expr.left);
-- 
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