ENH: Add access to last argument parsed

CommandLineArguments.cxx

@@ -485,6 +485,12 @@ const char* CommandLineArguments::GetArgv0()
   return this->Internals->Argv0.c_str();
 }
 
+//----------------------------------------------------------------------------
+unsigned int CommandLineArguments::GetLastArgument()
+{
+  return this->Internals->LastArgument + 1;
+}
+
 //----------------------------------------------------------------------------
 void CommandLineArguments::GenerateHelp()
 {

CommandLineArguments.hxx.in

@@ -142,6 +142,12 @@ public:
    */
   const char* GetArgv0();
 
+  /**
+   * Get index of the last argument parsed. This is the last argument that was
+   * parsed ok in the original argc/argv list.
+   */
+  unsigned int GetLastArgument();
+
 protected:
 
   void GenerateHelp();