[boost] Re: [Formal review] Singleton library - bcc32 5.6.4 error

From: Russell Hind (rh_gmane_at_[hidden])
Date: 2005-05-05 14:17:03

Jason Hise wrote:
> 
> The previous line makes me worry that CRTP will not work on your 
> compiler.  CRTP is a major foundation for the library, so if it doesn't 
> work it may not be possible to find a work around.  Does the following 
> compile?
> 
> template < typename Type >
> struct Base
> {
>    Type * ptr;
> };
> 
> struct Derived : public Base < Derived >
> {
> };
> 

Yes, this compiles fine.

> 
> These might be the result of some compiler problem with friends inside 
> templated classes.  See if this compiles:
> 
> template < typename Type >
> class Outer
> {
> private:
>    typedef Type some_type;
> 
>    class Inner
>    {
>        typename Outer < Type >::some_type inner;
>    } inner;
> 
>    friend class Inner;
> };
> 
> int main (  )
> {
>    Outer < int > test;
>    return 0;
> }
> 

This also compiles fine.

Thanks

Russell