Mercurial > repo
view interps/rail/src/NilVar.h @ 5987:0dc03a98eb58
<oerjan> rm wisdom/v\xc3\xa4lkommen
author | HackBot |
---|---|
date | Mon, 14 Sep 2015 17:51:14 +0000 |
parents | 859f9b4339e6 |
children |
line wrap: on
line source
// NilVar.h #ifndef NIL_VAR_H_RAIL_1 #define NIL_VAR_H_RAIL_1 #include "Var.h" class NilVar : public Var { public: NilVar() {} virtual ~NilVar() {} virtual StringVar * getString(void) { return NULL; } virtual ListVar * getList(void) { return NULL; } virtual NilVar * getNil(void) { return this; } virtual Closure * getClosure(void) { return NULL; } virtual std::string toString(void) const { return "<NIL>"; } private: NilVar(NilVar const &) {} NilVar & operator=(NilVar const &) { return *this; } }; #endif