From 277f7110b01a510e42fd8a75682ebe3c4daa3d40 Mon Sep 17 00:00:00 2001
From: Ben Winston
Date: Tue, 23 May 2023 22:49:42 -0400
Subject: first crack at lists (rather naive)

---
 chunk.d | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'chunk.d')

diff --git a/chunk.d b/chunk.d
index afaba8b..ad5774c 100644
--- a/chunk.d
+++ b/chunk.d
@@ -7,6 +7,7 @@ import parser;
 enum ObjType {
     FUNCTION,
     SCRIPT,
+    LIST,
 }
 
 abstract class Obj {
@@ -35,6 +36,26 @@ class Function : Obj {
     }
 }
 
+class List : Obj {
+    int[] addresses;
+
+    this() {
+        this.type = ObjType.LIST;
+    }
+
+    void addItem(int addr) {
+        addresses ~= addr;
+    }
+
+    int first() {
+        return addresses[0]; // TODO this fails on empty lists
+    }
+
+    override string toString() {
+        return format("list (%d)", addresses.length);
+    }
+}
+
 enum OpCode {
     OP_ADD,
     OP_LESS,
@@ -61,8 +82,14 @@ enum OpCode {
 
     OP_CALL,
 
+    OP_CONCAT,  // No?
+
+    OP_FIRST,   // No?
+
     OP_TYPE_CHECK_NUMBER,
     OP_TYPE_CHECK_BOOLEAN,
+    OP_TYPE_CHECK_STRING,
+    OP_TYPE_CHECK_LIST,
 }
 
 class Chunk {
-- 
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