OpenEuphoria

Re: include statement bugs

• Posted by Robert Craig <rds at RapidEuphoria.com> Oct 18, 2004
• 724 views

Derek Parnell wrote:
> Do you believe that two files always have the same content if
> the have the same name but reside in different folders?
> 
> For example, given these two files ...
> 
>   myfolder\abc.ew
>   yourfolder\abc.ew
> 
> do you believe that their contents must therefore also be
> identical, just because their names are the same?

The second include is ignored on the assumption that they
are essentially the same. ("belief" that they are "identical" 
overstates things a bit)
 
> If not, will v2.5 use the entire canonical path name when it
> determines whether or not to instantiate a new included file?

No it won't. 
I consider this to be a tiny issue that affects maybe 1% or less
of all programs. I think it took several years for anyone to 
even notice how it works. How many people want to include two files
in one program, where the files have the same name, but 
different content?

As I think back 10 years or so, I think I did it
this way because I didn't want:
           graphics.e
           .\graphics.e
           ./graphics.e
           c:\euphoria\include\graphics.e
           \euphoria\include\graphics.e
           c:graphics.e
       to be considered "different" files, leading to 
       multiply-defined symbol error messages,
       when in fact they might be exactly the same file,
       or at least a copy of a file. I didn't want to write code 
       to resolve the paths, to prove that one of them was in fact 
       the same file as another.

If this bothers you, just rename one of your files (and avoid
confusing the reader of your code).

By the way, this and the backslash vs. forward slash thing
can be changed easily by anyone in the new source code. 
e.g. copied from global.e in the 2.5 front-end...

global integer PATH_SEPARATOR, SLASH
global sequence SLASH_CHARS
if ELINUX then
    PATH_SEPARATOR = ':' -- in PATH environment variable
    SLASH = '/'          -- preferred on Linux/FreeBSD
    SLASH_CHARS =  "/"   -- special chars allowed in a path
else
    PATH_SEPARATOR = ';'
    SLASH = '\\'
    SLASH_CHARS = "\\/:"
end if

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com