Paul Pluzhnikov wrote:

> $ aCC -c junk.cpp
> Error (future) 641: "junk.cpp", line 15 # Undeclared variable 'is_ok'.
> A variable with the same name exists in a template base class,
> but is not visible according to the Standard lookup rules
> (See [temp.dep], 14.6.2(3) in the C++ Standard).
> You can make it visible by writing 'this->is_ok'.

It is pity, i have no "[temp.dep], 14.6.2(3) in the C++ Standard".
So can you explain me the reason of the hiding?

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