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diff --git a/xfa/fxfa/fm2js/xfa_fmparse.h b/xfa/fxfa/fm2js/xfa_fmparse.h
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index 0000000000..a8991b466f
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+++ b/xfa/fxfa/fm2js/xfa_fmparse.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_FXFA_FM2JS_XFA_FMPARSE_H_
+#define XFA_FXFA_FM2JS_XFA_FMPARSE_H_
+
+#include <memory>
+
+#include "xfa/fxfa/fm2js/xfa_expression.h"
+#include "xfa/fxfa/fm2js/xfa_lexer.h"
+
+class CXFA_FMParse {
+ public:
+  CXFA_FMParse();
+  int32_t Init(const CFX_WideStringC& wsFormcalc, CXFA_FMErrorInfo* pErrorInfo);
+  void NextToken();
+  void Check(XFA_FM_TOKEN op);
+  void Error(FX_DWORD lineNum, XFA_FM_ERRMSG msg, ...);
+  CFX_PtrArray* ParseTopExpression();
+  CXFA_FMExpression* ParseFunction();
+  CXFA_FMExpression* ParseExpression();
+  CXFA_FMExpression* ParseVarExpression();
+  CXFA_FMExpression* ParseExpExpression();
+  CXFA_FMExpression* ParseBlockExpression();
+  CXFA_FMExpression* ParseIfExpression();
+  CXFA_FMExpression* ParseWhileExpression();
+  CXFA_FMExpression* ParseForExpression();
+  CXFA_FMExpression* ParseForeachExpression();
+  CXFA_FMExpression* ParseDoExpression();
+  CXFA_FMSimpleExpression* ParseParenExpression();
+  CXFA_FMSimpleExpression* ParseSimpleExpression();
+  CXFA_FMSimpleExpression* ParseSubassignmentInForExpression();
+  CXFA_FMSimpleExpression* ParseLogicalOrExpression();
+  CXFA_FMSimpleExpression* ParseLogicalAndExpression();
+  CXFA_FMSimpleExpression* ParseEqualityExpression();
+  CXFA_FMSimpleExpression* ParseRelationalExpression();
+  CXFA_FMSimpleExpression* ParseAddtiveExpression();
+  CXFA_FMSimpleExpression* ParseMultiplicativeExpression();
+  CXFA_FMSimpleExpression* ParseUnaryExpression();
+  CXFA_FMSimpleExpression* ParsePrimaryExpression();
+  CXFA_FMSimpleExpression* ParsePostExpression(CXFA_FMSimpleExpression* e);
+  CXFA_FMSimpleExpression* ParseIndexExpression();
+
+ private:
+  std::unique_ptr<CXFA_FMLexer> m_lexer;
+  CXFA_FMToken* m_pToken;
+  CXFA_FMErrorInfo* m_pErrorInfo;
+};
+
+#endif  // XFA_FXFA_FM2JS_XFA_FMPARSE_H_