full path to source file __FILE__

[Jonathan Marler via Digitalmars-d-learn]

On Friday, 22 July 2016 at 09:37:24 UTC, sdhdfhed wrote:
> On Friday, 22 July 2016 at 08:36:37 UTC, Jonathan Marler wrote:
>> On Friday, 22 July 2016 at 07:57:35 UTC, sdhdfhed wrote:
>>> On Friday, 22 July 2016 at 07:47:14 UTC, Jonathan Marler 
>>> wrote:
>>>> On Friday, 22 July 2016 at 05:41:00 UTC, fdgdsgf wrote:
>>>>> What's wrong with __FILE__.dirName ?
>>>>
>>>> It's kinda weird, sometimes I've noticed that the __FILE__ 
>>>> keyword is an absolute path, and sometimes it isn't.  If it 
>>>> was always an absolute path, that would work.  I decided to 
>>>> take a stab at implementing this in the dmd compiler:
>>>>
>>>> https://github.com/dlang/dmd/pull/5959
>>>>
>>>> It adds a __FILE_FULL_PATH__ trait which would solve the 
>>>> issue.
>>>
>>> Personally I've never seen a relative __FILE__. Is this an 
>>> issue that's confirmed ?
>>>
>>> I mean  that it would be better to fix __FILE__ so that its 
>>> result is always absolute then. I think that such a "PPR" 
>>> (punk-pull-request) has 0% chance of being accepted, 
>>> especially since it adds a special keyword !
>>
>> It's definitely confirmed.  And now that I've walked through 
>> the source code, I see that it wasn't implemented to be an 
>> absolute path, it just happens to be some of the time 
>> depending on how the file is found.  I'm sure Walter will have 
>> an opinion as to what solution he prefers.  Either redefining 
>> the __FILE__ trait or adding a new one. He's communicating 
>> fixes to the PR on github so that a good sign.  We'll see.
>
> Yes, i've seen he 's started to review.
>
> I don't know if you've seen my other suggestion but another 
> solution would be to force relative fnames passed to the 
> compiler to be translated to absolute. This is also why I've 
> never seen a relative __FILE__. The build tool I use always 
> does the expansion in intern before calling the compiler.

Again that's Walter's call.  The __FILE__ trait seems to be used 
most useful for error messages.  I could see him wanting it to be 
a relative path sometimes and an absolute one other times.  By 
redefining it to always be absolute would solve this problem, but 
might make others things harder.  I'm not particularly for or 
against either solution (not sure why you're trying to convince 
me of this one), that would be up to the owners of the language :)