Do not copy data when it is not needed

components/config/gamesettings.cpp

@@ -187,7 +187,7 @@ bool Config::GameSettings::writeFile(QTextStream &stream)
             QString string = i.value();
 
             stream << delim;
-            for (auto it : string)
+            for (auto& it : string)
             {
                 if (it == delim || it == escape)
                     stream << escape;
@@ -407,7 +407,7 @@ bool Config::GameSettings::writeFileWithComments(QFile &file)
             QString string = it.value();
 
             settingLine += delim;
-            for (auto iter : string)
+            for (auto& iter : string)
             {
                 if (iter == delim || iter == escape)
                     settingLine += escape;

components/detournavigator/navigatorimpl.cpp

@@ -131,7 +131,7 @@ namespace DetourNavigator
     void NavigatorImpl::addPathgrid(const ESM::Cell& cell, const ESM::Pathgrid& pathgrid)
     {
         Misc::CoordinateConverter converter(&cell);
-        for (auto edge : pathgrid.mEdges)
+        for (auto& edge : pathgrid.mEdges)
         {
             const auto src = Misc::Convert::makeOsgVec3f(converter.toWorldPoint(pathgrid.mPoints[edge.mV0]));
             const auto dst = Misc::Convert::makeOsgVec3f(converter.toWorldPoint(pathgrid.mPoints[edge.mV1]));

components/esm3/activespells.cpp

@@ -24,7 +24,7 @@ namespace
                 esm.writeHNT ("TIME", params.mNextWorsening);
             }
 
-            for (auto effect : params.mEffects)
+            for (auto& effect : params.mEffects)
             {
                 esm.writeHNT ("MGEF", effect.mEffectId);
                 if (effect.mArg != -1)

components/fx/technique.cpp

@@ -117,7 +117,7 @@ namespace fx
 
             int swaps = 0;
 
-            for (auto name : mPassKeys)
+            for (auto& name : mPassKeys)
             {
                 auto it = mPassMap.find(name);
 

components/lua/l10n.cpp

@@ -57,7 +57,6 @@ namespace LuaUtil
     {
         std::vector<icu::Formattable> args;
         std::vector<icu::UnicodeString> argNames;
-           for (auto elem : table)
         for (auto& [key, value] : table)
         {
             // Argument values

components/lua/utilpackage.cpp

@@ -229,19 +229,19 @@ namespace LuaUtil
         {
             util["bitOr"] = [](unsigned a, sol::variadic_args va)
             {
-                for (auto v : va)
+                for (const auto& v : va)
                     a |= v.as<unsigned>();
                 return a;
             };
             util["bitAnd"] = [](unsigned a, sol::variadic_args va)
             {
-                for (auto v : va)
+                for (const auto& v : va)
                     a &= v.as<unsigned>();
                 return a;
             };
             util["bitXor"] = [](unsigned a, sol::variadic_args va)
             {
-                for (auto v : va)
+                for (const auto& v : va)
                     a ^= v.as<unsigned>();
                 return a;
             };

components/sdlutil/sdlmappings.cpp

@@ -219,7 +219,7 @@ namespace SDLUtil
         std::map<MyGUI::KeyCode, SDL_Keycode> reverseKeyMap(const std::map<SDL_Keycode, MyGUI::KeyCode>& map)
         {
             std::map<MyGUI::KeyCode, SDL_Keycode> result;
-            for (auto [sdl, mygui] : map)
+            for (auto& [sdl, mygui] : map)
                 result[mygui] = sdl;
             return result;
         }

components/shader/shadermanager.cpp

@@ -434,7 +434,7 @@ namespace Shader
     osg::ref_ptr<osg::Program> ShaderManager::cloneProgram(const osg::Program* src)
     {
         osg::ref_ptr<osg::Program> program = static_cast<osg::Program*>(src->clone(osg::CopyOp::SHALLOW_COPY));
-        for (auto [name, idx] : src->getUniformBlockBindingList())
+        for (auto& [name, idx] : src->getUniformBlockBindingList())
             program->addBindUniformBlock(name, idx);
         return program;
     }