C++ VS2013 strange error C2247?

Asked Sep 13 '16 at 14:30

Active Sep 13 '16 at 14:37

Viewed 149 times

I faced up a very strange error that I don't understand (using Visual Studio 2013). With the following example:

class a {
public:
    a() = default;
};

class b : private a {
public:
    b() = default;
};

class c : public b {
public:
    c() = default;
    a var;    // ERROR C2247
};

I got following error:

error C2247: 'a' not accessible because 'b' uses 'private' to inherit from 'a'

The only way to get it compiled is to change the declaration of 'var' as following:

::a var;

I'm just curious to understand why do the compiler misinterpret the first declaration of 'var' ? what can it imagine ?

edited Sep 13 '16 at 14:37

asked Sep 13 '16 at 14:30

Patrick Colis

3

This is a duplicate. I am just trying to find it. – NathanOliver Sep 13 '16 at 14:32
`a` is injected. This is WAI. – Kerrek SB Sep 13 '16 at 14:33
@NathanOliver Oh I think I've seen it? Was it a recent thing about injected name or something? – Borgleader Sep 13 '16 at 14:33
1

@Borgleader Yes. I just can't find it. I forgot to favorite it. – NathanOliver Sep 13 '16 at 14:34
http://stackoverflow.com/questions/5634637/private-inheritance-name-lookup-error this? – Hayt Sep 13 '16 at 14:34
@Borgleader Thanks for finding that – NathanOliver Sep 13 '16 at 14:37
or http://stackoverflow.com/questions/15342410/passing-a-pointer-of-inaccessible-private-base-type-to-the-derived-class-method – stijn Sep 13 '16 at 14:37
Thank you very much for the links and your help. It's obvious now :-) – Patrick Colis Sep 13 '16 at 14:43

C++ VS2013 strange error C2247?

0 Answers0