0 not a valid FILE* when provided as a template argument

Posted by Seva Alekseyev on Stack Overflow See other posts from Stack Overflow or by Seva Alekseyev
Published on 2010-03-30T21:30:03Z Indexed on 2010/03/30 21:33 UTC
Read the original article Hit count: 308

Filed under:

c++

|

objective-c++

|

xcode

The following code

#include <stdio.h>
template <typename T, T v> class Tem
{
    T t;
    Tem()
    {
        t = v;
    }
};

typedef Tem<FILE*,NULL> TemFile;

when compiled in a .mm file (Objective C++) by Xcode on MacOS X, throws the following error:

error: could not convert template argument '0' to 'FILE*'.

What's going on, please? The code in question compiled fine under MSVC. Since when is the 0 constant not a valid pointer to anything? Is this an artifact of Objective C++ (as opposed to vanilla C++)?

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