[CommandLine] Deal with some TODO notes

src/commandline/ArgumentDef.winxed

@@ -22,9 +22,6 @@ namespace Rosella.CommandLine.ArgumentDef
 */
 class Rosella.CommandLine.ArgumentDef
 {
-    // TODO: Can we take positional aliases here in some way, with the rest of
-    // the named argument defs for unified processing and description generation?
-
     var raw_defs;       // The raw argument definitions from the user
     var prepared_defs;  // The prepared/processed argument definitions
     var aliases;        // Map of aliased argument names
@@ -56,7 +53,6 @@ class Rosella.CommandLine.ArgumentDef
     // definitions and the description message associated with each
     function get_description(var sb = new 'StringBuilder')
     {
-        // TODO: Take a list of positional aliases and include those
         self.__get_description_internal(self.raw_defs, sb);
         return sb;
     }

src/commandline/ModeCondition.winxed

@@ -68,7 +68,9 @@ class Rosella.CommandLine.ModeCondition.ScalarExists : Rosella.CommandLine.ModeC
 
     function get_description(var sb)
     {
-        // TODO: This!
+        string name = self.scalarname;
+        push(sb, " ");
+        push(sb, self.__get_flag_name(name));
     }
 }
 
@@ -173,6 +175,25 @@ class Rosella.CommandLine.ModeCondition.NumPositionals : Rosella.CommandLine.Mod
 
     function NumPositionals(int min, int max)
     {
-        // TODO: This
+        self.min_positionals = min;
+        self.max_positionals = max;
+    }
+
+    function is_satisfied(var args)
+    {
+        int min = int(self.min_positionals);
+        int max = int(self.max_positionals);
+        int n = elements(args.pos_cache);
+
+        if (min != -1 && n < min)
+            return false;
+        if (max != -1 && n > max)
+            return false;
+        return true;
+    }
+
+    function get_description(var sb)
+    {
+        //push(sb, " ...");
     }
 }