Re: pascal equivalent of python "sleep"
- From: Marco van de Voort <marcov@xxxxxxxx>
- Date: Thu, 8 May 2008 15:34:45 +0000 (UTC)
On 2008-05-08, thomas.mertes@xxxxxx <thomas.mertes@xxxxxx> wrote:
(snip)
With such tings as 'sleep' and many other functionality
your program will depend on your Pascal compiler and
become unportable. This is a sad story.
(snip)
That I still admire Pascal's concepts can be seen
when you look at Seed7.
It is really fatigueing to plug seed7 as a resolution for inter-compiler
compability if there is only one implementation of seed(n)
I did not plug Seed7 as a solution for incompatible
Pascal dialects
Then for what did you plug it?
The beginning of the mail contains
information about the 'sleep' function and the
paragraph about Pascal and portability can also be
helpful.
Was already posted.
The last paragraph should just show that although I am a critic of Pascal
I do not hate it.
IMHO the number of implementations does not play a role
for portability
No but it is needed for standard purposes. Since there is no need for a
standards without. (ok, maybe for compat between versions, but that is
already a magnitude less important)
C has many implementations and the
portability problems which exist in Pascal are simply
not present.
Then find a sleep() in a strictly conforming C compiler! You won't find it,
it is POSIX, not C. (not to forget that even then there are several, and
various implementations have varying units for the arguments, from ns to
seconds)
The problem is that many of the early proponents of Pascal (and if you
look at this discussion also current proponents) simply do not care about
portability.
That is IMHO revisionism. The early C code was a dirty as Pascal. Still to
this day, most of the C++ code is intrinsically tied to a certain VS
version.
And even for basic stuff Simply because only the more recent POSIX standards unified this kind of
behaviour, and the non (Open Source) Unix state is still doubtful at best.
This has to do with the areas where C and Pascal came from.
BTW. There is some classic article about Pascal and C from Brian W.
Kernighan: http://www.lysator.liu.se/c/bwk-on-pascal.html
Which is IMHO incorrect. And even if there ever was truth about it, it
ceased after the first half of the eighties.
Pascal was simply popular at an earlier state, while C was still tied to
Unix.
You are right that there is currently only one
implementation of Seed7, but this implementation
runs on various operating systems (unix, bsd, linux
windows) on different hardware and with several C
compilers.
Windows= Windows 32/64/ce ?
Additionally this implementation is open
source (GPL) and therefore can be used to port Seed7
to even more places. I tried to reach that level of
portability with Pascal (a predecessor of the current
Seed7 interpreter was implemented in Pascal) and
failed tatally because of the incompatible Pascal
dialects.
Or , actually more a multitarget compiler. Strike out gcc, and see how far you get with C.
Luckily there is now FPC (and even GPC would already target all those)
.
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