Command: Added DNA for commands

src/commands/Command.cpp

@@ -218,6 +218,10 @@ Command::Command ()
 , _read_only (true)
 , _displays_id (true)
 , _needs_confirm (false)
+, _needs_gc (true)
+, _uses_context (true)
+, _accepts_filter (true)
+, _accepts_modifications (true)
 , _permission_quit (false)
 , _permission_all (false)
 , _first_iteration (true)
@@ -259,6 +263,36 @@ bool Command::displays_id () const
   return _displays_id;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool Command::needs_gc () const
+{
+  return _needs_gc;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Command::uses_context () const
+{
+  return _uses_context;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Command::accepts_filter () const
+{
+  return _accepts_filter;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Command::accepts_modifications () const
+{
+  return _accepts_modifications;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+bool Command::accepts_miscellaneous () const
+{
+  return _accepts_miscellaneous;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Returns true or false indicating whether to proceed with a write command, on
 // a per-task basis, after (potentially) asking for permission.

src/commands/Command.h

@@ -45,6 +45,11 @@ public:
   std::string description () const;
   bool read_only () const;
   bool displays_id () const;
+  bool needs_gc () const;
+  bool uses_context () const;
+  bool accepts_filter () const;
+  bool accepts_modifications () const;
+  bool accepts_miscellaneous () const;
   virtual int execute (std::string&) = 0;
 
   enum class Category
@@ -76,6 +81,11 @@ protected:
   bool        _read_only;
   bool        _displays_id;
   bool        _needs_confirm;
+  bool        _needs_gc;
+  bool        _uses_context;
+  bool        _accepts_filter;
+  bool        _accepts_modifications;
+  bool        _accepts_miscellaneous;
 
   // Permission support
   bool        _permission_quit;