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diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/SeparateDeclarations.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/SeparateDeclarations.h
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+++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/SeparateDeclarations.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 SeparateDeclarations function processes declarations, so that in the end each declaration
+// contains only one declarator.
+// This is useful as an intermediate step when initialization needs to be separated from
+// declaration, or when things need to be unfolded out of the initializer.
+// Example:
+//     int a[1] = int[1](1), b[1] = int[1](2);
+// gets transformed when run through this class into the AST equivalent of:
+//     int a[1] = int[1](1);
+//     int b[1] = int[1](2);
+
+#ifndef COMPILER_TRANSLATOR_TREEOPS_SEPARATEDECLARATIONS_H_
+#define COMPILER_TRANSLATOR_TREEOPS_SEPARATEDECLARATIONS_H_
+
+#include "common/angleutils.h"
+
+namespace sh
+{
+class TCompiler;
+class TIntermNode;
+class TSymbolTable;
+
+[[nodiscard]] bool SeparateDeclarations(TCompiler *compiler,
+                                        TIntermNode *root,
+                                        TSymbolTable *symbolTable);
+}  // namespace sh
+
+#endif  // COMPILER_TRANSLATOR_TREEOPS_SEPARATEDECLARATIONS_H_