From a84ebc3af9c2086581008e7a05444698e1a6eb15 Mon Sep 17 00:00:00 2001
From: James Price <jrprice@google.com>
Date: Thu, 22 Dec 2022 14:32:16 +0000
Subject: [PATCH] tint: Add forward declaration for CastableBase

This fixes the google3 build, which compiles headers in isolation.

Change-Id: I3c9a91caa75c6da1d9dcc17bb6d2aeb5834c197e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/115440
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: James Price <jrprice@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
---
 src/tint/sem/type_mappings.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tint/sem/type_mappings.h b/src/tint/sem/type_mappings.h
index 6502f9aa3e..f8aca4db42 100644
--- a/src/tint/sem/type_mappings.h
+++ b/src/tint/sem/type_mappings.h
@@ -18,6 +18,9 @@
 #include <type_traits>
 
 // Forward declarations
+namespace tint {
+class CastableBase;
+}  // namespace tint
 namespace tint::ast {
 class Array;
 class Expression;