From f4185577e56a893b9375bc94d71bef5f9eb51891 Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Fri, 12 Aug 2022 23:18:02 -0700
Subject: Chapter 27.3

---
 clox/src/object.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'clox/src/object.h')

diff --git a/clox/src/object.h b/clox/src/object.h
index 44de6ed..1cef631 100644
--- a/clox/src/object.h
+++ b/clox/src/object.h
@@ -3,6 +3,7 @@
 
 #include "chunk.h"
 #include "common.h"
+#include "table.h"
 #include "value.h"
 
 #define OBJ_TYPE(value) (AS_OBJ(value)->type)
@@ -10,12 +11,14 @@
 #define IS_CLASS(value) isObjType(value, OBJ_CLASS)
 #define IS_CLOSURE(value) isObjType(value, OBJ_CLOSURE)
 #define IS_FUNCTION(value) isObjType(value, OBJ_FUNCTION)
+#define IS_INSTANCE(value) isObjType(value, OBJ_INSTANCE)
 #define IS_NATIVE(value) isObjType(value, OBJ_NATIVE)
 #define IS_STRING(value) isObjType(value, OBJ_STRING)
 
 #define AS_CLASS(value) ((ObjClass *)AS_OBJ(value))
 #define AS_CLOSURE(value) ((ObjClosure *)AS_OBJ(value))
 #define AS_FUNCTION(value) ((ObjFunction *)AS_OBJ(value))
+#define AS_INSTANCE(value) ((ObjInstance *)AS_OBJ(value))
 #define AS_NATIVE(value) (((ObjNative *)AS_OBJ(value))->function)
 #define AS_STRING(value) ((ObjString *)AS_OBJ(value))
 #define AS_CSTRING(value) (((ObjString *)AS_OBJ(value))->chars)
@@ -24,6 +27,7 @@ typedef enum {
   OBJ_CLASS,
   OBJ_CLOSURE,
   OBJ_FUNCTION,
+  OBJ_INSTANCE,
   OBJ_NATIVE,
   OBJ_STRING,
   OBJ_UPVALUE,
@@ -76,9 +80,16 @@ typedef struct {
   ObjString *name;
 } ObjClass;
 
+typedef struct {
+  Obj obj;
+  ObjClass *klass;
+  Table fields;
+} ObjInstance;
+
 ObjClass *newClass(ObjString *name);
 ObjClosure *newClosure(ObjFunction *function);
 ObjFunction *newFunction();
+ObjInstance *newInstance(ObjClass *klass);
 ObjNative *newNative(NativeFn function);
 ObjString *takeString(char *chars, int length);
 ObjString *copyString(const char *chars, int length);
-- 
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