Re: [Boost-users] [Singleton] When CRTP won't work

AMDG Alexander wrote:

The current version of Boost candidate Signelton as well as other implementation is CRTP base. However, one may want to use it as local class

my_class& get_something(std::string const& param) { struct local : singleton<local> { ... }; return local::instance->some_method(param); }

The problem is not CRTP, per se, but templates. It is not legal to pass a local class as a template parameter. I don't see how you can implement a singleton generically without using templates. Sorry, but I think the only solution is to move the local class to namespace scope. In Christ, Steven Watanabe