first crack at lists (rather naive)

1 files changed, 27 insertions, 0 deletions

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 {