Use std::string_view to avoid redundant std::string construction

apps/opencs/model/world/scope.cpp

@@ -12,7 +12,7 @@ CSMWorld::Scope CSMWorld::getScopeFromId (const std::string& id)
     std::string::size_type i = id.find ("::");
 
     if (i!=std::string::npos)
-        namespace_ = Misc::StringUtils::lowerCase (id.substr (0, i));
+        namespace_ = Misc::StringUtils::lowerCase(std::string_view(id).substr(0, i));
 
     if (namespace_=="project")
         return Scope_Project;

apps/openmw/mwdialogue/selectwrapper.cpp

@@ -293,5 +293,5 @@ bool MWDialogue::SelectWrapper::selectCompare (bool value) const
 
 std::string MWDialogue::SelectWrapper::getName() const
 {
-    return Misc::StringUtils::lowerCase (mSelect.mSelectRule.substr (5));
+    return Misc::StringUtils::lowerCase(std::string_view(mSelect.mSelectRule).substr(5));
 }

components/interpreter/defines.cpp

@@ -36,8 +36,8 @@ namespace Interpreter{
             if(eschar == '%' || eschar == '^')
             {
                 retval << text.substr(start, i - start);
-                std::string temp = Misc::StringUtils::lowerCase(text.substr(i+1, 100));
-                
+                std::string temp = Misc::StringUtils::lowerCase(std::string_view(text).substr(i + 1, 100));
+
                 bool found = false;
                 try
                 {
@@ -170,10 +170,10 @@ namespace Interpreter{
                             sort(globals.begin(), globals.end(), longerStr);
                         }
 
-                        for(unsigned int j = 0; j < globals.size(); j++){
-                            if(globals[j].length() > temp.length()){ // Just in case there's a global with a huuuge name
-                                temp = Misc::StringUtils::lowerCase(text.substr(i+1, globals[j].length()));
-                            }
+                        for(unsigned int j = 0; j < globals.size(); j++)
+                        {
+                            if (globals[j].length() > temp.length()) // Just in case there's a global with a huuuge name
+                                temp = Misc::StringUtils::lowerCase(std::string_view(text).substr(i + 1, globals[j].length()));
 
                             found = check(temp, globals[j], &i, &start);
                             if(found){

components/resource/keyframemanager.cpp

@@ -27,7 +27,8 @@ namespace Resource
 
     void RetrieveAnimationsVisitor::apply(osg::Node& node)
     {
-        if (node.libraryName() == std::string("osgAnimation") && node.className() == std::string("Bone") && Misc::StringUtils::lowerCase(node.getName()) == std::string("bip01"))
+        if (node.libraryName() == std::string_view("osgAnimation") && node.className() == std::string_view("Bone")
+                && Misc::StringUtils::lowerCase(node.getName()) == std::string_view("bip01"))
             {
                 osg::ref_ptr<SceneUtil::OsgAnimationController> callback = new SceneUtil::OsgAnimationController();