Re: template const trick versus myers singleton - global data revisited

Technical <>
Sun, 21 Jun 2009 18:13:35 -0700 (PDT)
On Jun 20, 10:40 pm, "Alf P. Steinbach" <> wrote:

Depends what you mean. The templated const trick is mostly for where you =

need a

/non-integral/ type constant. That is, except for possible static initial=


fiasco issues you can safely do this, in a header file:

   template< typename Dummy >
   struct Names_ { static std::string const cppLanguageCreator; };

   template< typename Dummy >
   std::string const Names_<Dummy>::cppLanguageCreator = "Bjarne St=


   typedef Names_<void> Names;

It's slowly coming together for me. Last(hopefully) quesiton.

  template < typename dummy >
  struct consts // constants
    static double const PI;
    inline static std::string const& creator()
      static std::string const cppLanguageCreator = "Bjarne
      return ( cppLanguageCreator );

  template< typename dummy > double const consts<dummy>::PI =
  typedef consts<void> constants;

Would the creator method within the struct be a a suitable alternative
to circumventing the possible static initialization fiasco?

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