From afc4a3fe1618239017e15cabc664dd70abc1d75b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Edvard=20Th=C3=B6rnros?= <edvard.thornros@gmail.com>
Date: Sun, 31 Jan 2021 22:28:48 +0100
Subject: add assignment ops

---
 src/vm.rs | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

(limited to 'src/vm.rs')

diff --git a/src/vm.rs b/src/vm.rs
index fd8eb73..6ff7b65 100644
--- a/src/vm.rs
+++ b/src/vm.rs
@@ -159,17 +159,23 @@ impl VM {
                 self.pop();
             }
 
-            Op::Yield => {
-                self.frame_mut().ip += 1;
-                return Ok(OpResult::Yield);
-            }
-
             Op::PopUpvalue => {
                 let value = self.pop();
                 let slot = self.stack.len();
                 self.drop_upvalue(slot, value);
             }
 
+            Op::Copy => {
+                let v = self.pop();
+                self.push(v.clone());
+                self.push(v);
+            }
+
+            Op::Yield => {
+                self.frame_mut().ip += 1;
+                return Ok(OpResult::Yield);
+            }
+
             Op::Constant(value) => {
                 let offset = self.frame().stack_offset;
                 let value = match value {
-- 
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