refactor(tazjin/rlox): Represent VM values as enums r/2251

Introduces a new enum which represents the different types of possible
values, and modifies the rest of the existing code to wrap/unwrap
these enum variants correctly.

Notably in the vm module, a new macro has been introduced that makes
it possible to encode a type expectation and return a runtime error in
case of a type mismatch.

Change-Id: I325b5e31e395c62d8819ab2af6d398e1277333c0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2570
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI

1 files changed, 1 insertions, 1 deletions

diff --git a/users/tazjin/rlox/src/bytecode/chunk.rs b/users/tazjin/rlox/src/bytecode/chunk.rs
index b2a7c7b6a2..7132be430a 100644
--- a/users/tazjin/rlox/src/bytecode/chunk.rs
+++ b/users/tazjin/rlox/src/bytecode/chunk.rs
@@ -49,7 +49,7 @@ impl Chunk {
         }
     }
 
-    fn get_line(&self, offset: usize) -> usize {
+    pub fn get_line(&self, offset: usize) -> usize {
         let mut pos = 0;
         for span in &self.lines {
             pos += span.count;