feat(tazjin/rlox): Bootstrap rough shape of bytecode compiler r/2237

This one necessarily has to diverge more from the book than the
treewalk interpreter did, so some of this is expected to change, but
I'm happy with the rough shape.

Since we're reusing the old scanner, the compiler/parser struct owns
an iterator over all tokens with which the pull-scanner from the
bytecode chapters is simulated.

Change-Id: Icfa0bd4729d9df786e08f7e49a25cba1b9989a91
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2556
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

1 files changed, 1 insertions, 0 deletions

diff --git a/users/tazjin/rlox/src/bytecode/errors.rs b/users/tazjin/rlox/src/bytecode/errors.rs
index 99b2aa406c99..4d6daff0f3f0 100644
--- a/users/tazjin/rlox/src/bytecode/errors.rs
+++ b/users/tazjin/rlox/src/bytecode/errors.rs
@@ -6,6 +6,7 @@ use std::fmt;
 pub enum ErrorKind {
     UnexpectedChar(char),
     UnterminatedString,
+    ExpectedToken(&'static str),
     InternalError(&'static str),
 }