Template parameter is incompatible with the declaration

Code:

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template<int> class Test2 {};
template<typename A, template<int> class B, int C> class Test
{
        template<typename, template<int> class, int> friend class Test;
};

void FindFiles(Test<int, Test2, 10> pBuffer = 0);

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Error 1 error C3855: 'Test': template parameter 'B' is incompatible with the declaration
Error 2 error C3855: 'Test': template parameter 'C' is incompatible with the declaration

:confused:
If I change the B and C to typename, it compiles fine, though. Any ideas?

The only obvious error I can spot with that code, on an admittedly casual look, is that the default value of the argument for FindFiles() is invalid (no obvious conversion of int to Test<int, Test2, 10> ).

Yes, it would cause a compile error admittedly, but regardless of what I put there, and regardless of if it's a valid or invalid default value, the error still occurs.
If I remove the default value, it compiles.
I also can't get comeau's online compiler to work...

Quote:

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Originally Posted by Elysia

Yes, it would cause a compile error admittedly, but regardless of what I put there, and regardless of if it's a valid or invalid default value, the error still occurs.
If I remove the default value, it compiles.
I also can't get comeau's online compiler to work...

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Can you provide us with the shortest code snippet that produces this error ;-).

That is exactly what I gave you. Add int main(), compile, and lo and behold.

Quote:

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Originally Posted by Elysia

That is exactly what I gave you. Add int main(), compile, and lo and behold.

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Well, your sample compiles fine for me, -pedantic and -Wall and all. G++ version 4.4.1, ubuntu.
So I guess your compiler is buggy.

Just out of interest, what compiler is it?


Edit:

Quote:

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Using: Microsoft Windows™ 7 Professional (x64), Microsoft Visual Studio™ 2008 Team System

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That explains it. Guess you're screwed here :P.

Hrm. Guess I'm going to have to give VS2010 another go.
EDIT: Buggy as hell as always. Crashes as soon as you try to compile. Still gives the same error, too.

interesting code.
Whats it supposed to do?

Quote:

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Originally Posted by Elysia

EDIT: Buggy as hell as always. Crashes as soon as you try to compile. Still gives the same error, too.

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LOL :D.
How can it crash AND produce that error, though? :P

Quote:

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Originally Posted by KIBO

interesting code.
Whats it supposed to do?

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This code? Nothing.
The real code? Make all template instantiations friends of each other.

Quote:

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Originally Posted by EVOEx

LOL :D.
How can it crash AND produce that error, though? :P

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It has enough time to spit out that error before crashing.