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diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateArrayInitialization.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateArrayInitialization.h
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/SeparateArrayInitialization.h
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+//
+// Copyright 2002 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// The SeparateArrayInitialization function splits each array initialization into a declaration and
+// an assignment.
+// Example:
+//     type[n] a = initializer;
+// will effectively become
+//     type[n] a;
+//     a = initializer;
+//
+// Note that if the array is declared as const, the initialization may still be split, making the
+// AST technically invalid. Because of that this transformation should only be used when subsequent
+// stages don't care about const qualifiers. However, the initialization will not be split if the
+// initializer can be written as a HLSL literal.
+
+#ifndef COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEARRAYINITIALIZATION_H_
+#define COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEARRAYINITIALIZATION_H_
+
+#include "common/angleutils.h"
+
+namespace sh
+{
+class TCompiler;
+class TIntermNode;
+
+[[nodiscard]] bool SeparateArrayInitialization(TCompiler *compiler, TIntermNode *root);
+}  // namespace sh
+
+#endif  // COMPILER_TRANSLATOR_TREEOPS_D3D_SEPARATEARRAYINITIALIZATION_H_