attempted to implement localization loading

app/common/commandlineparser.cpp

@@ -34,11 +34,11 @@ CommandLineParser::~CommandLineParser()
   }
 }
 
-const CommandLineParser::Option *CommandLineParser::AddOption(const QStringList &strings, const QString &description)
+const CommandLineParser::Option *CommandLineParser::AddOption(const QStringList &strings, const QString &description, bool takes_arg, const QString &arg_placeholder)
 {
   Option* o = new Option();
 
-  options_.append({strings, description, o});
+  options_.append({strings, description, o, takes_arg, arg_placeholder});
 
   return o;
 }
@@ -72,6 +72,12 @@ void CommandLineParser::Process(int argc, char **argv)
           if (!s.compare(arg_basename, Qt::CaseInsensitive)) {
             // Flag discovered!
             o.option->Set();
+
+            if (o.takes_arg && i+1 < argc) {
+              o.option->SetSetting(argv[i+1]);
+              i++;
+            }
+
             matched_known = true;
             goto found_flag;
           }
@@ -147,7 +153,11 @@ void CommandLineParser::PrintHelp(const char* filename)
       all_args.append(this_arg);
     }
 
-    printf("    %s\n", all_args.toUtf8().constData());
+    if (o.arg_placeholder.isEmpty()) {
+      printf("    %s\n", all_args.toUtf8().constData());
+    } else {
+      printf("    %s <%s>\n", all_args.toUtf8().constData(), o.arg_placeholder.toUtf8().constData());
+    }
 
     printf("        %s\n\n", o.description.toUtf8().constData());
   }

app/common/commandlineparser.h

@@ -33,7 +33,27 @@ public:
 
   DISABLE_COPY_MOVE(CommandLineParser)
 
-  class Option {
+  class PositionalArgument
+  {
+  public:
+    PositionalArgument() = default;
+
+    const QString& GetSetting() const
+    {
+      return setting_;
+    }
+
+    void SetSetting(const QString& s)
+    {
+      setting_ = s;
+    }
+
+  private:
+    QString setting_;
+
+  };
+
+  class Option : public PositionalArgument {
   public:
     Option()
     {
@@ -55,29 +75,9 @@ public:
 
   };
 
-  class PositionalArgument
-  {
-  public:
-    PositionalArgument() = default;
-
-    const QString& GetSetting() const
-    {
-      return setting_;
-    }
-
-    void SetSetting(const QString& s)
-    {
-      setting_ = s;
-    }
-
-  private:
-    QString setting_;
-
-  };
-
   CommandLineParser() = default;
 
-  const Option* AddOption(const QStringList& strings, const QString& description);
+  const Option* AddOption(const QStringList& strings, const QString& description, bool takes_arg = false, const QString& arg_placeholder = QString());
 
   const PositionalArgument* AddPositionalArgument(const QString& name, const QString& description, bool required = false);
 
@@ -90,6 +90,8 @@ private:
     QStringList args;
     QString description;
     Option* option;
+    bool takes_arg;
+    QString arg_placeholder;
   };
 
   struct KnownPositionalArgument {