From c85431ecaa29505edf0aba6a6df5861ec1054841 Mon Sep 17 00:00:00 2001
From: Daniel Duan <daniel@duan.ca>
Date: Thu, 5 Feb 2026 23:43:25 -0800
Subject: [PATCH] Use UInt8 storage for hot parser enums

Switch Token.Kind and InternalTOMLArray.Kind to UInt8-backed enums. The parser compares these enums in tight loops, and smaller enum storage can improve code generation and reduce data movement without changing semantics.
---
 Sources/TOMLDecoder/Parsing/TOMLDocument.swift | 2 +-
 Sources/TOMLDecoder/Parsing/Token.swift        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Sources/TOMLDecoder/Parsing/TOMLDocument.swift b/Sources/TOMLDecoder/Parsing/TOMLDocument.swift
index d5a250ff..ce77a20b 100644
--- a/Sources/TOMLDecoder/Parsing/TOMLDocument.swift
+++ b/Sources/TOMLDecoder/Parsing/TOMLDocument.swift
@@ -90,7 +90,7 @@ struct InternalTOMLArray: Equatable, Sendable {
         }
     }
 
-    enum Kind {
+    enum Kind: UInt8 {
         case value
         case array
         case table
diff --git a/Sources/TOMLDecoder/Parsing/Token.swift b/Sources/TOMLDecoder/Parsing/Token.swift
index 82775cd0..c2857648 100644
--- a/Sources/TOMLDecoder/Parsing/Token.swift
+++ b/Sources/TOMLDecoder/Parsing/Token.swift
@@ -1,5 +1,5 @@
 struct Token: Equatable {
-    enum Kind {
+    enum Kind: UInt8 {
         case dot
         case comma
         case equal