feat(tazjin/rlox): Implement PartialEq for interpreter::Value r/2099

Values have equality, unless they're functions.

Change-Id: Ie5c623081a1fa556e6b7a5251b0ce85af68dd31a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2385
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI

1 files changed, 10 insertions, 0 deletions

diff --git a/users/tazjin/rlox/src/interpreter.rs b/users/tazjin/rlox/src/interpreter.rs
index ef76af9168..744e6ea895 100644
--- a/users/tazjin/rlox/src/interpreter.rs
+++ b/users/tazjin/rlox/src/interpreter.rs
@@ -38,6 +38,16 @@ pub enum Value {
     Callable(Callable),
 }
 
+impl PartialEq for Value {
+    fn eq(&self, other: &Self) -> bool {
+        match (self, other) {
+            (Value::Literal(lhs), Value::Literal(rhs)) => lhs == rhs,
+            // functions do not have equality
+            _ => false,
+        }
+    }
+}
+
 impl From<Literal> for Value {
     fn from(lit: Literal) -> Value {
         Value::Literal(lit)