fixup:

* more const work in class Launcher
* remove private functions without impl. from header

src/Launcher.cpp

@@ -46,7 +46,7 @@ Launcher::Launcher(int argc, char * argv[]) : argc(argc), argv(argv), useGui(tru
 }
 
 
-int Launcher::startGUI() {
+int Launcher::startGUI() const {
 #ifndef NO_GUI
     // Create main window
     MainWindow mw;
@@ -72,22 +72,23 @@ struct CoutProgressIndicator : public ProgressIndicator {
 };
 
 
-std::list<LoadOptions> Launcher::getBracketedSets() {
+std::list<LoadOptions> Launcher::getBracketedSets() const {
     std::list<LoadOptions> result;
     if (generalOptions.grouping == LoadOptions::Grouping::MANUAL) {
-        while(!generalOptions.fileNames.empty()) {
+        QStringList fileNames = generalOptions.fileNames;
+        while(!fileNames.empty()) {
             LoadOptions opt = generalOptions;
             auto oIt = opt.fileNames.begin();
-            auto goIt = generalOptions.fileNames.begin();
+            auto goIt = fileNames.begin();
             std::advance(oIt, generalOptions.imagesPerBracket);
             std::advance(goIt, generalOptions.imagesPerBracket);
             opt.fileNames.erase(oIt, opt.fileNames.end());
-            generalOptions.fileNames.erase(generalOptions.fileNames.begin(), goIt);
+            fileNames.erase(fileNames.begin(), goIt);
             result.push_back(opt);
         }
     } else {
         std::list<std::pair<ImageIO::QDateInterval, QString>> dateNames;
-        for (QString & name : generalOptions.fileNames) {
+        for (const QString & name : generalOptions.fileNames) {
             ImageIO::QDateInterval interval = ImageIO::getImageCreationInterval(name);
             if (interval.start.isValid()) {
                 dateNames.emplace_back(interval, name);
@@ -121,7 +122,7 @@ std::list<LoadOptions> Launcher::getBracketedSets() {
 }
 
 
-int Launcher::automaticMerge() {
+int Launcher::automaticMerge() const {
     auto tr = [&] (const char * text) { return QCoreApplication::translate("LoadSave", text); };
     std::list<LoadOptions> optionsSet;
     if (generalOptions.grouping > LoadOptions::Grouping::ALL) {

src/Launcher.hpp

@@ -38,11 +38,9 @@ class Launcher {
     int run();
 
 private:
-    bool checkGUI();
-    int startGUI();
-    int automaticMerge();
-    void showHelp();
-    std::list<LoadOptions> getBracketedSets();
+    int startGUI() const;
+    int automaticMerge() const;
+    std::list<LoadOptions> getBracketedSets() const;
 
     int argc;
     char ** argv;