Use std::lower_bound() in a couple places.

Do some cleanups along the way.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1732223002 .

4 files changed, 155 insertions, 153 deletions

diff --git a/core/src/fxge/ge/fx_ge_fontmap.cpp b/core/src/fxge/ge/fx_ge_fontmap.cpp
index b9850f85db..06b58ea3ab 100644
--- a/core/src/fxge/ge/fx_ge_fontmap.cpp
+++ b/core/src/fxge/ge/fx_ge_fontmap.cpp
@@ -4,6 +4,7 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include <algorithm>
 #include <limits>
 #include <vector>
 
@@ -197,17 +198,17 @@ const struct FX_FontStyle {
     {"Bold", 4}, {"Italic", 6}, {"BoldItalic", 10}, {"Reg", 3}, {"Regular", 7},
 };
 
-const struct CHARSET_MAP {
-  uint8_t charset;
+const struct CODEPAGE_MAP {
   FX_WORD codepage;
+  uint8_t charset;
 } g_Codepage2CharsetTable[] = {
-    {1, 0},      {2, 42},     {254, 437},  {255, 850},  {222, 874},
-    {128, 932},  {134, 936},  {129, 949},  {136, 950},  {238, 1250},
-    {204, 1251}, {0, 1252},   {161, 1253}, {162, 1254}, {177, 1255},
-    {178, 1256}, {186, 1257}, {163, 1258}, {130, 1361}, {77, 10000},
-    {78, 10001}, {79, 10003}, {80, 10008}, {81, 10002}, {83, 10005},
-    {84, 10004}, {85, 10006}, {86, 10081}, {87, 10021}, {88, 10029},
-    {89, 10007},
+    {0, 1},      {42, 2},     {437, 254},  {850, 255},  {874, 222},
+    {932, 128},  {936, 134},  {949, 129},  {950, 136},  {1250, 238},
+    {1251, 204}, {1252, 0},   {1253, 161}, {1254, 162}, {1255, 177},
+    {1256, 178}, {1257, 186}, {1258, 163}, {1361, 130}, {10000, 77},
+    {10001, 78}, {10002, 81}, {10003, 79}, {10004, 84}, {10005, 83},
+    {10006, 85}, {10007, 89}, {10008, 80}, {10021, 87}, {10029, 88},
+    {10081, 86},
 };
 
 const FX_DWORD kTableNAME = FXDWORD_GET_MSBFIRST("name");
@@ -281,21 +282,15 @@ CFX_ByteString FPDF_LoadTableFromTT(FXSYS_FILE* pFile,
 }
 
 uint8_t GetCharsetFromCodePage(FX_WORD codepage) {
-  int32_t iEnd = sizeof(g_Codepage2CharsetTable) / sizeof(CHARSET_MAP) - 1;
-  FXSYS_assert(iEnd >= 0);
-  int32_t iStart = 0, iMid;
-  do {
-    iMid = (iStart + iEnd) / 2;
-    const CHARSET_MAP& cp = g_Codepage2CharsetTable[iMid];
-    if (codepage == cp.codepage) {
-      return cp.charset;
-    }
-    if (codepage < cp.codepage) {
-      iEnd = iMid - 1;
-    } else {
-      iStart = iMid + 1;
-    }
-  } while (iStart <= iEnd);
+  const CODEPAGE_MAP* pEnd =
+      g_Codepage2CharsetTable + FX_ArraySize(g_Codepage2CharsetTable);
+  const CODEPAGE_MAP* pCharmap =
+      std::lower_bound(g_Codepage2CharsetTable, pEnd, codepage,
+                       [](const CODEPAGE_MAP& charset, FX_WORD page) {
+                         return charset.codepage < page;
+                       });
+  if (pCharmap < pEnd && codepage == pCharmap->codepage)
+    return pCharmap->charset;
   return 1;
 }
 
diff --git a/xfa/src/fgas/src/localization/fx_locale.cpp b/xfa/src/fgas/src/localization/fx_locale.cpp
index 46eeae0c4f..ca12dbb69e 100644
--- a/xfa/src/fgas/src/localization/fx_locale.cpp
+++ b/xfa/src/fgas/src/localization/fx_locale.cpp
@@ -55,8 +55,6 @@ static const FX_LOCALETIMEZONEINFO g_FXLocaleTimeZoneData[] = {
     {FXBSTR_ID(0, 'M', 'D', 'T'), -6, 0}, {FXBSTR_ID(0, 'M', 'S', 'T'), -7, 0},
     {FXBSTR_ID(0, 'P', 'D', 'T'), -7, 0}, {FXBSTR_ID(0, 'P', 'S', 'T'), -8, 0},
 };
-static const int32_t g_iFXLocaleTimeZoneCount =
-    sizeof(g_FXLocaleTimeZoneData) / sizeof(FX_LOCALETIMEZONEINFO);
 
 static const CFX_WideStringC gs_wsTextSymbols = FX_WSTRC(L"AXO09");
 static const CFX_WideStringC gs_wsTimeSymbols = FX_WSTRC(L"hHkKMSFAzZ");
@@ -2771,22 +2769,13 @@ static FX_BOOL FX_ParseLocaleTime(const CFX_WideString& wsTime,
         }
         FX_ResolveZone(hour, minute, tzDiff, pLocale);
       } else {
-        const FX_LOCALETIMEZONEINFO* pTimeZoneInfo = NULL;
-        int32_t iStart = 0;
-        int32_t iEnd = g_iFXLocaleTimeZoneCount - 1;
-        do {
-          int32_t iMid = (iStart + iEnd) / 2;
-          const FX_LOCALETIMEZONEINFO* pInfo = g_FXLocaleTimeZoneData + iMid;
-          if (dwHash == pInfo->uHash) {
-            pTimeZoneInfo = pInfo;
-            break;
-          } else if (dwHash < pInfo->uHash) {
-            iEnd = iMid - 1;
-          } else {
-            iStart = iMid + 1;
-          }
-        } while (iStart <= iEnd);
-        if (pTimeZoneInfo) {
+        const FX_LOCALETIMEZONEINFO* pEnd =
+            g_FXLocaleTimeZoneData + FX_ArraySize(g_FXLocaleTimeZoneData);
+        const FX_LOCALETIMEZONEINFO* pTimeZoneInfo =
+            std::lower_bound(g_FXLocaleTimeZoneData, pEnd, dwHash,
+                             [](const FX_LOCALETIMEZONEINFO& info,
+                                FX_DWORD hash) { return info.uHash < hash; });
+        if (pTimeZoneInfo < pEnd && dwHash == pTimeZoneInfo->uHash) {
           hour += pTimeZoneInfo->iHour;
           minute += pTimeZoneInfo->iHour > 0 ? pTimeZoneInfo->iMinute
                                              : -pTimeZoneInfo->iMinute;
diff --git a/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.cpp b/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.cpp
index b0ce3ad4ca..68faa7ae0c 100644
--- a/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.cpp
+++ b/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.cpp
@@ -5,7 +5,10 @@
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/src/fxfa/src/fm2js/xfa_fm2js.h"
-static CFX_WideStringC gs_lpStrExpFuncName[] = {
+
+namespace {
+
+const CFX_WideStringC gs_lpStrExpFuncName[] = {
     FX_WSTRC(L"foxit_xfa_formcalc_runtime.assign_value_operator"),
     FX_WSTRC(L"foxit_xfa_formcalc_runtime.logical_or_operator"),
     FX_WSTRC(L"foxit_xfa_formcalc_runtime.logical_and_operator"),
@@ -32,11 +35,12 @@ static CFX_WideStringC gs_lpStrExpFuncName[] = {
     FX_WSTRC(L"foxit_xfa_formcalc_runtime.get_fm_jsobj"),
     FX_WSTRC(L"foxit_xfa_formcalc_runtime.fm_var_filter"),
 };
-CFX_WideStringC XFA_FM_EXPTypeToString(
-    XFA_FM_SimpleExpressionType simpleExpType) {
-  return gs_lpStrExpFuncName[simpleExpType];
-}
-static XFA_FMBuildInFunc buildInFuncs[] = {
+
+struct XFA_FMBuildInFunc {
+  uint32_t m_uHash;
+  const FX_WCHAR* m_buildinfunc;
+};
+const XFA_FMBuildInFunc g_BuildInFuncs[] = {
     {0x0001f1f5, L"At"},           {0x00020b9c, L"FV"},
     {0x00021aef, L"If"},           {0x00023ee6, L"PV"},
     {0x04b5c9ee, L"Encode"},       {0x08e96685, L"DateFmt"},
@@ -71,7 +75,13 @@ static XFA_FMBuildInFunc buildInFuncs[] = {
     {0xea18d121, L"Choose"},       {0xebfef69c, L"Replace"},
     {0xf5ad782b, L"Left"},         {0xf7bb2248, L"Ltrim"},
 };
-static const XFA_FMSOMMethod gs_FMSomMethods[] = {
+
+struct XFA_FMSOMMethod {
+  uint32_t m_uHash;
+  const FX_WCHAR* m_wsSomMethodName;
+  FX_DWORD m_dParameters;
+};
+const XFA_FMSOMMethod gs_FMSomMethods[] = {
     {0x00000068, L"h", 0x01},
     {0x00000077, L"w", 0x01},
     {0x00000078, L"x", 0x01},
@@ -94,6 +104,14 @@ static const XFA_FMSOMMethod gs_FMSomMethods[] = {
     {0xda12e518, L"append", 0x01},
     {0xe74f0653, L"absPage", 0x01},
 };
+
+}  // namespace
+
+CFX_WideStringC XFA_FM_EXPTypeToString(
+    XFA_FM_SimpleExpressionType simpleExpType) {
+  return gs_lpStrExpFuncName[simpleExpType];
+}
+
 CXFA_FMSimpleExpression::CXFA_FMSimpleExpression(FX_DWORD line, XFA_FM_TOKEN op)
     : m_line(line), m_op(op) {}
 void CXFA_FMSimpleExpression::ToJavaScript(CFX_WideTextBuf& javascript) {}
@@ -174,10 +192,7 @@ CXFA_FMUnaryExpression::CXFA_FMUnaryExpression(FX_DWORD line,
                                                CXFA_FMSimpleExpression* pExp)
     : CXFA_FMSimpleExpression(line, op), m_pExp(pExp) {}
 CXFA_FMUnaryExpression::~CXFA_FMUnaryExpression() {
-  if (m_pExp != 0) {
-    delete m_pExp;
-    m_pExp = 0;
-  }
+  delete m_pExp;
 }
 void CXFA_FMUnaryExpression::ToJavaScript(CFX_WideTextBuf& javascript) {}
 CXFA_FMBinExpression::CXFA_FMBinExpression(FX_DWORD line,
@@ -186,14 +201,8 @@ CXFA_FMBinExpression::CXFA_FMBinExpression(FX_DWORD line,
                                            CXFA_FMSimpleExpression* pExp2)
     : CXFA_FMSimpleExpression(line, op), m_pExp1(pExp1), m_pExp2(pExp2) {}
 CXFA_FMBinExpression::~CXFA_FMBinExpression() {
-  if (m_pExp1 != 0) {
-    delete m_pExp1;
-    m_pExp1 = 0;
-  }
-  if (m_pExp2 != 0) {
-    delete m_pExp2;
-    m_pExp2 = 0;
-  }
+  delete m_pExp1;
+  delete m_pExp2;
 }
 void CXFA_FMBinExpression::ToJavaScript(CFX_WideTextBuf& javascript) {}
 CXFA_FMAssignExpression::CXFA_FMAssignExpression(FX_DWORD line,
@@ -446,29 +455,25 @@ CXFA_FMCallExpression::~CXFA_FMCallExpression() {
     m_pArguments = 0;
   }
 }
-FX_BOOL CXFA_FMCallExpression::IsBuildInFunc(CFX_WideTextBuf& funcName) {
-  uint32_t uHash =
-      FX_HashCode_String_GetW(funcName.GetBuffer(), funcName.GetLength(), TRUE);
-  XFA_FMBuildInFunc buildinfunction;
-  int32_t iStart = 0,
-          iEnd = (sizeof(buildInFuncs) / sizeof(buildInFuncs[0])) - 1;
-  int32_t iMid = (iStart + iEnd) / 2;
-  do {
-    iMid = (iStart + iEnd) / 2;
-    buildinfunction = buildInFuncs[iMid];
-    if (uHash == buildinfunction.m_uHash) {
-      funcName.Clear();
-      funcName << buildinfunction.m_buildinfunc;
-      return TRUE;
-    } else if (uHash < buildinfunction.m_uHash) {
-      iEnd = iMid - 1;
-    } else {
-      iStart = iMid + 1;
-    }
-  } while (iStart <= iEnd);
-  return FALSE;
+
+bool CXFA_FMCallExpression::IsBuildInFunc(CFX_WideTextBuf* funcName) {
+  uint32_t uHash = FX_HashCode_String_GetW(funcName->GetBuffer(),
+                                           funcName->GetLength(), TRUE);
+  const XFA_FMBuildInFunc* pEnd = g_BuildInFuncs + FX_ArraySize(g_BuildInFuncs);
+  const XFA_FMBuildInFunc* pFunc =
+      std::lower_bound(g_BuildInFuncs, pEnd, uHash,
+                       [](const XFA_FMBuildInFunc& func, uint32_t hash) {
+                         return func.m_uHash < hash;
+                       });
+  if (pFunc < pEnd && uHash == pFunc->m_uHash) {
+    funcName->Clear();
+    *funcName << pFunc->m_buildinfunc;
+    return true;
+  }
+  return false;
 }
-FX_DWORD CXFA_FMCallExpression::IsSomMethodWithObjPara(
+
+FX_DWORD CXFA_FMCallExpression::IsMethodWithObjParam(
     const CFX_WideStringC& methodName) {
   int32_t iLength = methodName.GetLength();
   uint32_t uHash = FX_HashCode_String_GetW(methodName.GetPtr(), iLength);
@@ -500,7 +505,7 @@ void CXFA_FMCallExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
     if (m_pArguments) {
       int32_t argc = m_pArguments->GetSize();
       int32_t index = 0;
-      FX_DWORD methodPara = IsSomMethodWithObjPara(funcName.GetWideString());
+      FX_DWORD methodPara = IsMethodWithObjParam(funcName.GetWideString());
       if (methodPara > 0) {
         CXFA_FMSimpleExpression* e = 0;
         while (index < argc) {
@@ -535,16 +540,16 @@ void CXFA_FMCallExpression::ToJavaScript(CFX_WideTextBuf& javascript) {
     }
     javascript << FX_WSTRC(L")");
   } else {
-    FX_BOOL isEvalFunc = FALSE;
-    FX_BOOL isExistsFunc = FALSE;
-    if (IsBuildInFunc(funcName)) {
+    bool isEvalFunc = false;
+    bool isExistsFunc = false;
+    if (IsBuildInFunc(&funcName)) {
       if (funcName.GetWideString() == FX_WSTRC(L"Eval")) {
-        isEvalFunc = TRUE;
+        isEvalFunc = true;
         javascript << FX_WSTRC(L"eval.call(this, ");
         javascript << gs_lpStrExpFuncName[CALL];
         javascript << FX_WSTRC(L"Translate");
       } else if (funcName.GetWideString() == FX_WSTRC(L"Exists")) {
-        isExistsFunc = TRUE;
+        isExistsFunc = true;
         javascript << gs_lpStrExpFuncName[CALL];
         javascript << funcName;
       } else {
diff --git a/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.h b/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.h
index f474004300..2fb9b8fc1c 100644
--- a/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.h
+++ b/xfa/src/fxfa/src/fm2js/xfa_simpleexpression.h
@@ -36,27 +36,21 @@ enum XFA_FM_SimpleExpressionType {
   GETFMJSOBJ,
   VARFILTER
 };
+
 CFX_WideStringC XFA_FM_EXPTypeToString(
     XFA_FM_SimpleExpressionType simpleExpType);
-struct XFA_FMBuildInFunc {
-  uint32_t m_uHash;
-  const FX_WCHAR* m_buildinfunc;
-};
-struct XFA_FMSOMMethod {
-  uint32_t m_uHash;
-  const FX_WCHAR* m_wsSomMethodName;
-  FX_DWORD m_dParameters;
-};
+
 enum XFA_FM_AccessorIndex {
   ACCESSOR_NO_INDEX,
   ACCESSOR_NO_RELATIVEINDEX,
   ACCESSOR_POSITIVE_INDEX,
   ACCESSOR_NEGATIVE_INDEX
 };
+
 class CXFA_FMSimpleExpression {
  public:
   CXFA_FMSimpleExpression(FX_DWORD line, XFA_FM_TOKEN op);
-  virtual ~CXFA_FMSimpleExpression(){};
+  virtual ~CXFA_FMSimpleExpression() {}
   virtual void ToJavaScript(CFX_WideTextBuf& javascript);
   virtual void ToImpliedReturnJS(CFX_WideTextBuf& javascript);
 
@@ -66,160 +60,178 @@ class CXFA_FMSimpleExpression {
   FX_DWORD m_line;
   XFA_FM_TOKEN m_op;
 };
+
 class CXFA_FMNullExpression : public CXFA_FMSimpleExpression {
  public:
-  CXFA_FMNullExpression(FX_DWORD line);
-  virtual ~CXFA_FMNullExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  explicit CXFA_FMNullExpression(FX_DWORD line);
+  ~CXFA_FMNullExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMNumberExpression : public CXFA_FMSimpleExpression {
  public:
   CXFA_FMNumberExpression(FX_DWORD line, CFX_WideStringC wsNumber);
-  virtual ~CXFA_FMNumberExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMNumberExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   CFX_WideStringC m_wsNumber;
 };
+
 class CXFA_FMStringExpression : public CXFA_FMSimpleExpression {
  public:
   CXFA_FMStringExpression(FX_DWORD line, CFX_WideStringC wsString);
-  virtual ~CXFA_FMStringExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMStringExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   CFX_WideStringC m_wsString;
 };
+
 class CXFA_FMIdentifierExpressionn : public CXFA_FMSimpleExpression {
  public:
   CXFA_FMIdentifierExpressionn(FX_DWORD line, CFX_WideStringC wsIdentifier);
-  virtual ~CXFA_FMIdentifierExpressionn(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMIdentifierExpressionn() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   CFX_WideStringC m_wsIdentifier;
 };
+
 class CXFA_FMUnaryExpression : public CXFA_FMSimpleExpression {
  public:
   CXFA_FMUnaryExpression(FX_DWORD line,
                          XFA_FM_TOKEN op,
                          CXFA_FMSimpleExpression* pExp);
-  virtual ~CXFA_FMUnaryExpression();
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMUnaryExpression() override;
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
  protected:
   CXFA_FMSimpleExpression* m_pExp;
 };
+
 class CXFA_FMBinExpression : public CXFA_FMSimpleExpression {
  public:
   CXFA_FMBinExpression(FX_DWORD line,
                        XFA_FM_TOKEN op,
                        CXFA_FMSimpleExpression* pExp1,
                        CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMBinExpression();
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMBinExpression() override;
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
  protected:
   CXFA_FMSimpleExpression* m_pExp1;
   CXFA_FMSimpleExpression* m_pExp2;
 };
+
 class CXFA_FMAssignExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMAssignExpression(FX_DWORD line,
                           XFA_FM_TOKEN op,
                           CXFA_FMSimpleExpression* pExp1,
                           CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMAssignExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
-  virtual void ToImpliedReturnJS(CFX_WideTextBuf& javascript);
+  ~CXFA_FMAssignExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
+  void ToImpliedReturnJS(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMLogicalOrExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMLogicalOrExpression(FX_DWORD line,
                              XFA_FM_TOKEN op,
                              CXFA_FMSimpleExpression* pExp1,
                              CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMLogicalOrExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMLogicalOrExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMLogicalAndExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMLogicalAndExpression(FX_DWORD line,
                               XFA_FM_TOKEN op,
                               CXFA_FMSimpleExpression* pExp1,
                               CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMLogicalAndExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMLogicalAndExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMEqualityExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMEqualityExpression(FX_DWORD line,
                             XFA_FM_TOKEN op,
                             CXFA_FMSimpleExpression* pExp1,
                             CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMEqualityExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMEqualityExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMRelationalExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMRelationalExpression(FX_DWORD line,
                               XFA_FM_TOKEN op,
                               CXFA_FMSimpleExpression* pExp1,
                               CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMRelationalExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMRelationalExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMAdditiveExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMAdditiveExpression(FX_DWORD line,
                             XFA_FM_TOKEN op,
                             CXFA_FMSimpleExpression* pExp1,
                             CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMAdditiveExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMAdditiveExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMMultiplicativeExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMMultiplicativeExpression(FX_DWORD line,
                                   XFA_FM_TOKEN op,
                                   CXFA_FMSimpleExpression* pExp1,
                                   CXFA_FMSimpleExpression* pExp2);
-  virtual ~CXFA_FMMultiplicativeExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMMultiplicativeExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMPosExpression : public CXFA_FMUnaryExpression {
  public:
   CXFA_FMPosExpression(FX_DWORD line, CXFA_FMSimpleExpression* pExp);
-  virtual ~CXFA_FMPosExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMPosExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMNegExpression : public CXFA_FMUnaryExpression {
  public:
   CXFA_FMNegExpression(FX_DWORD line, CXFA_FMSimpleExpression* pExp);
-  virtual ~CXFA_FMNegExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMNegExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMNotExpression : public CXFA_FMUnaryExpression {
  public:
   CXFA_FMNotExpression(FX_DWORD line, CXFA_FMSimpleExpression* pExp);
-  virtual ~CXFA_FMNotExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMNotExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
+
 class CXFA_FMCallExpression : public CXFA_FMUnaryExpression {
  public:
   CXFA_FMCallExpression(FX_DWORD line,
                         CXFA_FMSimpleExpression* pExp,
                         CFX_PtrArray* pArguments,
                         FX_BOOL bIsSomMethod);
-  virtual ~CXFA_FMCallExpression();
-  virtual FX_BOOL IsBuildInFunc(CFX_WideTextBuf& funcName);
-  virtual FX_DWORD IsSomMethodWithObjPara(const CFX_WideStringC& methodName);
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMCallExpression() override;
+  bool IsBuildInFunc(CFX_WideTextBuf* funcName);
+  FX_DWORD IsMethodWithObjParam(const CFX_WideStringC& methodName);
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
  private:
   FX_BOOL m_bIsSomMethod;
   CFX_PtrArray* m_pArguments;
 };
+
 class CXFA_FMDotAccessorExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMDotAccessorExpression(FX_DWORD line,
@@ -227,25 +239,27 @@ class CXFA_FMDotAccessorExpression : public CXFA_FMBinExpression {
                                XFA_FM_TOKEN op,
                                CFX_WideStringC wsIdentifier,
                                CXFA_FMSimpleExpression* pIndexExp);
-  virtual ~CXFA_FMDotAccessorExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMDotAccessorExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   CFX_WideStringC m_wsIdentifier;
 };
+
 class CXFA_FMIndexExpression : public CXFA_FMUnaryExpression {
  public:
   CXFA_FMIndexExpression(FX_DWORD line,
                          XFA_FM_AccessorIndex accessorIndex,
                          CXFA_FMSimpleExpression* pIndexExp,
                          FX_BOOL bIsStarIndex);
-  virtual ~CXFA_FMIndexExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMIndexExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   XFA_FM_AccessorIndex m_accessorIndex;
   FX_BOOL m_bIsStarIndex;
 };
+
 class CXFA_FMDotDotAccessorExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMDotDotAccessorExpression(FX_DWORD line,
@@ -253,21 +267,20 @@ class CXFA_FMDotDotAccessorExpression : public CXFA_FMBinExpression {
                                   XFA_FM_TOKEN op,
                                   CFX_WideStringC wsIdentifier,
                                   CXFA_FMSimpleExpression* pIndexExp);
-  virtual ~CXFA_FMDotDotAccessorExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
+  ~CXFA_FMDotDotAccessorExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 
- protected:
+ private:
   CFX_WideStringC m_wsIdentifier;
 };
+
 class CXFA_FMMethodCallExpression : public CXFA_FMBinExpression {
  public:
   CXFA_FMMethodCallExpression(FX_DWORD line,
                               CXFA_FMSimpleExpression* pAccessorExp1,
                               CXFA_FMSimpleExpression* pCallExp);
-  virtual ~CXFA_FMMethodCallExpression(){};
-  virtual void ToJavaScript(CFX_WideTextBuf& javascript);
-
- protected:
+  ~CXFA_FMMethodCallExpression() override {}
+  void ToJavaScript(CFX_WideTextBuf& javascript) override;
 };
 
 #endif  // XFA_SRC_FXFA_SRC_FM2JS_XFA_SIMPLEEXPRESSION_H_