From 0d645bf1a9eddcd26d5caf1cf29c319ec333f86e Mon Sep 17 00:00:00 2001
From: Adam Kelly <adam@cthulahoops.org>
Date: Sat, 4 Aug 2018 20:44:30 +0100
Subject: [PATCH] Add PrintExpr instruction to vm.

---
 vm/src/bytecode.rs |  1 +
 vm/src/vm.rs       | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/vm/src/bytecode.rs b/vm/src/bytecode.rs
index b404196b0..906e29e26 100644
--- a/vm/src/bytecode.rs
+++ b/vm/src/bytecode.rs
@@ -63,6 +63,7 @@ pub enum Instruction {
     BuildList { size: usize },
     BuildMap { size: usize },
     BuildSlice { size: usize },
+    PrintExpr,
 }
 
 #[derive(Debug, Clone)]
diff --git a/vm/src/vm.rs b/vm/src/vm.rs
index b04842214..0d45e22eb 100644
--- a/vm/src/vm.rs
+++ b/vm/src/vm.rs
@@ -736,6 +736,17 @@ impl VirtualMachine {
                 }
                 None
             }
+            bytecode::Instruction::PrintExpr => {
+                let expr = self.pop_value();
+                match expr.borrow().kind {
+                    PyObjectKind::None =>
+                        (),
+                    _ => {
+                        builtins::builtin_print(self, PyFuncArgs { args: vec![expr.clone()] });
+                    }
+                }
+                None
+            }
             _ => panic!("NOT IMPL {:?}", instruction),
         }
     }