Fix newly discovered clang-tidy issues

Clang-tidy reports some issues only from the currently compiled source
file and its associated header file.  Separating the compilation of
commands exposed some clang-tidy issues that were not reported previously.
Fix them.

Source/cmAddLibraryCommand.cxx

@@ -270,8 +270,8 @@ bool cmAddLibraryCommand::InitialPass(std::vector<std::string> const& args,
     yet its linker language. */
   if ((type == cmStateEnums::SHARED_LIBRARY ||
        type == cmStateEnums::MODULE_LIBRARY) &&
-      (this->Makefile->GetState()->GetGlobalPropertyAsBool(
-         "TARGET_SUPPORTS_SHARED_LIBS") == false)) {
+      !this->Makefile->GetState()->GetGlobalPropertyAsBool(
+        "TARGET_SUPPORTS_SHARED_LIBS")) {
     std::ostringstream w;
     w << "ADD_LIBRARY called with "
       << (type == cmStateEnums::SHARED_LIBRARY ? "SHARED" : "MODULE")

Source/cmConditionEvaluator.cxx

@@ -222,7 +222,7 @@ bool cmConditionEvaluator::GetBooleanValue(
     double d = strtod(arg.c_str(), &end);
     if (*end == '\0') {
       // The whole string is a number.  Use C conversion to bool.
-      return d ? true : false;
+      return static_cast<bool>(d);
     }
   }
 
@@ -444,7 +444,7 @@ bool cmConditionEvaluator::HandleLevel1(cmArgumentList& newArgs, std::string&,
       if (this->IsKeyword(keyCOMMAND, *arg) && argP1 != newArgs.end()) {
         cmCommand* command =
           this->Makefile.GetState()->GetCommand(argP1->c_str());
-        this->HandlePredicate(command ? true : false, reducible, arg, newArgs,
+        this->HandlePredicate(command != CM_NULLPTR, reducible, arg, newArgs,
                               argP1, argP2);
       }
       // does a policy exist
@@ -456,7 +456,7 @@ bool cmConditionEvaluator::HandleLevel1(cmArgumentList& newArgs, std::string&,
       // does a target exist
       if (this->IsKeyword(keyTARGET, *arg) && argP1 != newArgs.end()) {
         this->HandlePredicate(
-          this->Makefile.FindTargetToUse(argP1->GetValue()) ? true : false,
+          this->Makefile.FindTargetToUse(argP1->GetValue()) != CM_NULLPTR,
           reducible, arg, newArgs, argP1, argP2);
       }
       // does a test exist
@@ -464,7 +464,7 @@ bool cmConditionEvaluator::HandleLevel1(cmArgumentList& newArgs, std::string&,
           this->Policy64Status != cmPolicies::WARN) {
         if (this->IsKeyword(keyTEST, *arg) && argP1 != newArgs.end()) {
           const cmTest* haveTest = this->Makefile.GetTest(argP1->c_str());
-          this->HandlePredicate(haveTest ? true : false, reducible, arg,
+          this->HandlePredicate(haveTest != CM_NULLPTR, reducible, arg,
                                 newArgs, argP1, argP2);
         }
       } else if (this->Policy64Status == cmPolicies::WARN &&
@@ -638,8 +638,8 @@ bool cmConditionEvaluator::HandleLevel2(cmArgumentList& newArgs,
         bool success = cmSystemTools::FileTimeCompare(
           arg->GetValue(), (argP2)->GetValue(), &fileIsNewer);
         this->HandleBinaryOp(
-          (success == false || fileIsNewer == 1 || fileIsNewer == 0),
-          reducible, arg, newArgs, argP1, argP2);
+          (!success || fileIsNewer == 1 || fileIsNewer == 0), reducible, arg,
+          newArgs, argP1, argP2);
       }
 
       if (argP1 != newArgs.end() && argP2 != newArgs.end() &&

Source/cmFileCommand.cxx

@@ -2449,18 +2449,14 @@ public:
   {
   }
 
-  ~cURLEasyGuard(void)
+  ~cURLEasyGuard()
   {
     if (this->Easy) {
       ::curl_easy_cleanup(this->Easy);
     }
   }
 
-  inline void release(void)
-  {
-    this->Easy = CM_NULLPTR;
-    return;
-  }
+  void release() { this->Easy = CM_NULLPTR; }
 
 private:
   ::CURL* Easy;

Source/cmFindBase.cxx

@@ -302,7 +302,7 @@ bool cmFindBase::CheckForVariableInCache()
     cmState* state = this->Makefile->GetState();
     const char* cacheEntry = state->GetCacheEntryValue(this->VariableName);
     bool found = !cmSystemTools::IsNOTFOUND(cacheValue);
-    bool cached = cacheEntry ? true : false;
+    bool cached = cacheEntry != CM_NULLPTR;
     if (found) {
       // If the user specifies the entry on the command line without a
       // type we should add the type and docstring but keep the

Source/cmFindPackageCommand.cxx

@@ -673,8 +673,8 @@ bool cmFindPackageCommand::HandlePackageMode()
   bool configFileSetFOUNDFalse = false;
 
   if (fileFound) {
-    if ((this->Makefile->IsDefinitionSet(foundVar)) &&
-        (this->Makefile->IsOn(foundVar) == false)) {
+    if (this->Makefile->IsDefinitionSet(foundVar) &&
+        !this->Makefile->IsOn(foundVar)) {
       // by removing Foo_FOUND here if it is FALSE, we don't really change
       // the situation for the Config file which is about to be included,
       // but we make it possible to detect later on whether the Config file
@@ -693,8 +693,8 @@ bool cmFindPackageCommand::HandlePackageMode()
       found = true;
 
       // Check whether the Config file has set Foo_FOUND to FALSE:
-      if ((this->Makefile->IsDefinitionSet(foundVar)) &&
-          (this->Makefile->IsOn(foundVar) == false)) {
+      if (this->Makefile->IsDefinitionSet(foundVar) &&
+          !this->Makefile->IsOn(foundVar)) {
         // we get here if the Config file has set Foo_FOUND actively to FALSE
         found = false;
         configFileSetFOUNDFalse = true;
@@ -1416,8 +1416,7 @@ bool cmFindPackageCommand::CheckVersion(std::string const& config_file)
   // Look for foo-config-version.cmake
   std::string version_file = version_file_base;
   version_file += "-version.cmake";
-  if ((haveResult == false) &&
-      (cmSystemTools::FileExists(version_file.c_str(), true))) {
+  if (!haveResult && cmSystemTools::FileExists(version_file.c_str(), true)) {
     result = this->CheckVersionFile(version_file, version);
     haveResult = true;
   }
@@ -1425,14 +1424,13 @@ bool cmFindPackageCommand::CheckVersion(std::string const& config_file)
   // Look for fooConfigVersion.cmake
   version_file = version_file_base;
   version_file += "Version.cmake";
-  if ((haveResult == false) &&
-      (cmSystemTools::FileExists(version_file.c_str(), true))) {
+  if (!haveResult && cmSystemTools::FileExists(version_file.c_str(), true)) {
     result = this->CheckVersionFile(version_file, version);
     haveResult = true;
   }
 
   // If no version was requested a versionless package is acceptable.
-  if ((haveResult == false) && (this->Version.empty())) {
+  if (!haveResult && this->Version.empty()) {
     result = true;
   }
 

Source/cmHexFileConverter.cxx

@@ -206,7 +206,7 @@ bool cmHexFileConverter::TryConvert(const char* inFileName,
     } else if (type == IntelHex) {
       success = ConvertIntelHexLine(buf, outFile);
     }
-    if (success == false) {
+    if (!success) {
       break;
     }
   }

Source/cmLoadCommandCommand.cxx

@@ -64,7 +64,7 @@ public:
   void FinalPass() CM_OVERRIDE;
   bool HasFinalPass() const CM_OVERRIDE
   {
-    return this->info.FinalPass ? true : false;
+    return this->info.FinalPass != CM_NULLPTR;
   }
 
   /**