Is the following code legal, and does it do what I want (associate
the std::rel_ops templates with class MyClass)?  If not, is there any way
to make this association without wrapping MyClass in its own namespace?
How was std::rel_ops intended to be used?

class MyClass
{
  public:
   friend bool operator<(const MyClass&);
   friend bool operator==(const MyClass&);
   using namespace std::rel_ops;
};

Thanks...

- Marc
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msherman@magma.ca (Marc Sherman) writes:

> Is the following code legal, and does it do what I want (associate
> the std::rel_ops templates with class MyClass)?  If not, is there any way
> to make this association without wrapping MyClass in its own namespace?
> How was std::rel_ops intended to be used?
>
> class MyClass
> {
>   public:
>    friend bool operator<(const MyClass&);
>    friend bool operator==(const MyClass&);
>    using namespace std::rel_ops;
> };

This is not legal. [namespace.udir]/1 specifies:

 A using directive shall not appear in class scope, ...

In order to use them with your class, I believe callers of those
templates should put using directives into the blocks where they
need the operators.

Regards,
Martin
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