From 247d5e4411fae4deeaa4406850dd9b162d4dc718 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 6 Aug 2024 10:07:08 -0700
Subject: [PATCH] renderer/opengl: comptime assertion to verify

---
 src/renderer/opengl/CellProgram.zig | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/renderer/opengl/CellProgram.zig b/src/renderer/opengl/CellProgram.zig
index b77c3904c..48386362e 100644
--- a/src/renderer/opengl/CellProgram.zig
+++ b/src/renderer/opengl/CellProgram.zig
@@ -64,6 +64,13 @@ pub const CellMode = enum(u8) {
     }
 
     pub fn isFg(self: CellMode) bool {
+        // Since we use bit tricks below, we want to ensure the enum
+        // doesn't change without us looking at this logic again.
+        comptime {
+            const info = @typeInfo(CellMode).Enum;
+            std.debug.assert(info.fields.len == 5);
+        }
+
         return @intFromEnum(self) & @intFromEnum(@as(CellMode, .fg)) != 0;
     }
 };