Re: C++11/14

[Hans Aberg]

> On 20 Jan 2015, at 09:57, Akim Demaille <a...@lrde.epita.fr> wrote:
> 
> 
>> Le 19 janv. 2015 à 23:14, Hans Aberg <haber...@telia.com> a écrit :
>> 
>> 
>>> On 19 Jan 2015, at 18:35, Akim Demaille <a...@lrde.epita.fr> wrote:
>>> 
>>>> Le 19 janv. 2015 à 14:28, Hans Aberg <haber...@telia.com> a écrit :
>>>> 
>>>> So it may suffice to have move constructors in the class variant.
>>> 
>>> Right.  With #if around them :)
>> 
>> I succeeded in replacing all copying with move operations in the calc++ 
>> example!
> 
> That's good news, thanks for the experimentation!

Just for the record, I was able to fix the combined r- and r-value template:
    template <typename T>
    variant (T&& t)
      : yytypeid_ (&typeid (T))
    {
      YYASSERT (sizeof (T) <= S);
      typedef std::remove_reference_t<T> T1;
      new (yyas_<T1> ()) T1 (std::forward<T>(t));
    }

One then has to add
    template <typename T>
    T*
    yyas_ () &
    {
      void *yyp = yybuffer_.yyraw;
      return static_cast<T*> (yyp);
     }

And in addition l-value calls:
  basic_symbol (typename Base::kind_type t, const Int& v, const location_type& 
l);
  basic_symbol (typename Base::kind_type t, Int& v, const location_type& l);
  basic_symbol (typename Base::kind_type t, Int&& v, const location_type& l);

    static inline
    symbol_type
    make_NUMBER (const Int& v, const location_type& l);

    static inline
    symbol_type
    make_NUMBER (Int& v, const location_type& l);

    static inline
    symbol_type
    make_NUMBER (Int&& v, const location_type& l);


  template <typename Base>
  calcxx_parser::basic_symbol<Base>::basic_symbol (typename Base::kind_type t, 
const Int& v, const location_type& l)
    : Base (t)
    , value (v)
    , location (l)
  {}

  template <typename Base>
  calcxx_parser::basic_symbol<Base>::basic_symbol (typename Base::kind_type t, 
Int& v, const location_type& l)
    : Base (t)
    , value (v)
    , location (l)
  {}

  template <typename Base>
  calcxx_parser::basic_symbol<Base>::basic_symbol (typename Base::kind_type t, 
Int&& v, const location_type& l)
    : Base (t)
    , value (std::move(v))
    , location (l)
  {}


  calcxx_parser::symbol_type
  calcxx_parser::make_NUMBER (const Int& v, const location_type& l)
  {
    return symbol_type (token::TOK_NUMBER, v, l);
  }

  calcxx_parser::symbol_type
  calcxx_parser::make_NUMBER (Int& v, const location_type& l)
  {
    return symbol_type (token::TOK_NUMBER, v, l);
  }

  calcxx_parser::symbol_type
  calcxx_parser::make_NUMBER (Int&& v, const location_type& l)
  {
    return symbol_type (token::TOK_NUMBER, std::move(v), l);
  }