From a77dca528acacbf03af650e13c347c23f26cc212 Mon Sep 17 00:00:00 2001
From: Shaun Ren <sren@codeweavers.com>
Date: Thu, 23 Jan 2025 19:38:42 -0500
Subject: [PATCH] vkd3d-shader/hlsl: Forbid declaring const variables with no
 initializer.

---
 libs/vkd3d-shader/hlsl.y | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 492b9dee..9d14d051 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -2717,6 +2717,12 @@ static void declare_var(struct hlsl_ctx *ctx, struct parse_variable_def *v)
             hlsl_error(ctx, &var->loc, VKD3D_SHADER_ERROR_HLSL_INVALID_RESERVATION,
                     "packoffset() is only allowed inside constant buffer declarations.");
     }
+    else
+    {
+        if ((type->modifiers & HLSL_MODIFIER_CONST) && !v->initializer.args_count)
+            hlsl_error(ctx, &var->loc, VKD3D_SHADER_ERROR_HLSL_MISSING_INITIALIZER,
+                    "Const variable \"%s\" is missing an initializer.", var->name);
+    }
 
     if (ctx->cur_scope == ctx->globals)
     {