Re: File_Exists (Was: Press Release - Ada 2012 Language Standard Approved by ISO)

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Fri, 11 Jan 2013 17:19:37 +0100, Jacob Sparre Andersen <sparre@nbi.dk>  
a écrit:

> Dmitry A. Kazakov wrote:
>
>> Never use File_Exists if you can.
>
> One of my colleagues could come up with a sensible use case for
> "File_Missing": When a web service wants to know if it should ask a user
> to upload a profile image (stored in a file).
>
> Some applications use the existence of certain files as a simple
> external management interface.  Although I consider this bad style and
> prefer a socket based management interface, it might be considered a
> reasonable use as well.
>
> Can anybody supply some other sensible use cases for
> File_Exists/File_Missing.

A build system? (not restricted to building applications). One may want to  
check if the file exist, instead of trying to create or open it for  
rewrite and only then getting an exception if the file does not exist.


-- 
“Syntactic sugar causes cancer of the semi-colons.” [1]
“Structured Programming supports the law of the excluded muddle.” [1]
[1]: Epigrams on Programming — Alan J. — P. Yale University