Re: New gp features

[hermann@stamm-wilbrandt.de]

Thanks on 2 and 3.

On 2023-08-17 13:59, Bill Allombert wrote:
> This does not work, because user GP functions are 'strict':
> b and c are evaluated before foreach2 is evaluated to a closure.
>
> Instead you can do
> foreach2(a,c) = foreach(a,b,c(b))
> and then
> foreach2(a,t->printf("%d ",t[1]))
which GP version is needed to make that work?

hermann@7600x:~$ gp --version
                  GP/PARI CALCULATOR Version 2.15.3 (released)
          amd64 running linux (x86-64/GMP-6.2.1 kernel) 64-bit version
   compiled: Jun 30 2023, gcc version 11.3.0 (Ubuntu 
11.3.0-1ubuntu1~22.04.1)
                            threading engine: single
               (readline not compiled in, extended help enabled)
hermann@7600x:~$ gp -q
? foreach2(a,c) = foreach(a,b,c(b))
(a,c)->foreach(a,b,c(b))
? foreach2(a,t->printf("%d ",t[1]))
  ***   at top-level: foreach2(a,t->printf("%d ",t[1]))
  ***                 ^---------------------------------
  ***   in function foreach2: foreach(a,b,c(b))
  ***                         ^-----------------
  *** foreach: incorrect type in foreach (t_POL).
  ***   Break loop: type 'break' to go back to GP prompt
break>


Regards,

Hermann.