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From: Mild Shock <janburse@fastmail.fm>
Newsgroups: comp.lang.prolog
Subject: Is old school mode directed compilation dead? (Was: thank you for the
 FLOPs)
Date: Fri, 24 Jan 2025 17:57:17 +0100
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Hi,

Just noticed that SICStus Prolog says that
their mode declaration is a dummy declaration,
does nothing. Now I tried whether I can force

SWI Prolog to accept different manually compiled clauses:

test1(X,Y) :- Y = j(C,D), g(C) = A, h(D) = B, f(A,B) = X.

test2(X,Y) :- X = f(A,B), A = g(C), B = h(D), j(C,D) = Y.

Difficult to archive in SWI-Prolog, since it
orders unification on its own, test1/2 and test2/2
will behave the same, since they are essentially the same:

/* SWI-Prolog 9.3.19 */
?- listing(test1/2), listing(test2/2).
test1(f(A, B), j(C, D)) :-
     A=g(C),
     B=h(D).

test2(f(A, B), j(C, D)) :-
     A=g(C),
     B=h(D).

But maybe not necessary since SWI-Prolog has an
advanced instruction set and advanced Prolog
logical variable representation?

Bye

Mild Shock schrieb:
> Hi,
> 
> Given that Scryer Prolog is dead.
> This made me smile, traces of Scryer Prolog
> 
> are found in FLOPs 2024 proceedings:
> 
> 7th International Symposium, FLOPS 2024,
> Kumamoto, Japan, May 15–17, 2024, Proceedings
> https://www.cs.ox.ac.uk/jeremy.gibbons/flops2024.pdf
> 
> So why did it flop? Missing garbage collection
> in the Prolog System? Or did or is it to estimate
> that ChatGPT will also kill Scryer Prolog?
> 
> Or simply a problem of using Rust as the
> underlying host language?
> 
> Bye