Re: Using include-file

On 2024-09-04 15:13, dxf wrote:

On 3/09/2024 6:11 am, Ruvim wrote:

Do you know practical cases of using "include-file" in programs?
>
I can't imagine how this word could be used in standard programs.
...

 Here's a question.  Is there a temporal dependency on the 'fileid' passed
to INCLUDE-FILE ?

The section "11.6.1.1717 INCLUDE-FILE" [1] does not impose any such restriction on a program.
A general rule is that a standard program is allowed to do anything that is not explicitly prohibited for a program by the standard, a standard system is only allowed to do anything that is explicitly allowed for a system by the standard or undetectable by a standard program.

On my system 'fileid' for INCLUDE-FILE would need to represent the most
recently opened file.  Otherwise should a compilation error occur the wrong
statistics e.g. file-name will be printed.

A compilation error is an ambiguous condition, so the system is allowed to do whatever it wants. If the systems shows a wrong file name where an error occurred, this does not make it non-compliant.

AFAICS ANS only guarantees the contents of a file represented by 'fileid'.
The issue of filenames - if/when/how they're stored - is a detail left to the
implementer.  It's no problem for INCLUDED which binds opening of the file
with compilation.  However INCLUDE-FILE potentially separates these two.
 

Yes. OTOH, a system can obtain a file name from a file handle, see GetFileInformationByHandleEx in Windows, readlink on /proc/self/fd/NNN in POSIX.
--
Ruvim