Re: macro to print filename

[Zhongye Jia <jia.zhongye@gmail.com>]

thanks very much! it works very well only except that the
initialization should be placed out of the struct. the compiling time
computation in c++ is really amazing.

2011/6/2 Michal Nazarewicz <mina86@mina86.com>:
> On Wed, 01 Jun 2011 20:45:06 +0200, Zhongye Jia <jia.zhongye@gmail.com>
> wrote:
>>
>> I do not think this can be done in *compiling* time, neither macro in
>> c nor template in c++, so would you be so kind to offer the solution
>> by using template or just give  some tips? Since I'm not that good at
>> c++ :)
>
> I was thinking along the lines of:
>
> template<unsigned offset>
> struct _filename {
>        static const char *const val = __FILE__[offset] == '/'
>                ? __FILE__ + offset + 1
>                : _filename<offset-1>::val;
> };
>
> template<>
> struct _filename<0> {
>        static const char *const val = __FILE__;
> };
>
> static const char *const filename = _filename<sizeof(__FILE__) - 1>;
>
> I'm a bit rusty so I dunno if that'll work in this format.
>
> --
> Best regards,                                         _     _
> .o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
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