RE: Adding scoped local set/param declaration to GMPL

On a more serious note...

I don’t think local set/param declaration is that useful.  In the example given, you could create a one-dimensional array of sets and params that does the same thing.

-Marc

-----Original Message-----
From: Help-glpk <[email protected]> On Behalf Of Andrew Makhorin
Sent: Tuesday, August 25, 2020 5:03 PM
To: Domingo Alvarez Duarte <[email protected]>; [email protected]
Subject: Re: Adding scoped local set/param declaration to GMPL

On Tue, 2020-08-25 at 22:12 +0200, Domingo Alvarez Duarte wrote:
> Hello !
>
> I'm experimenting with allow local set/param declarations inside
> scoped blocks (for/if/then/else), it's the base to possibly experiment
> further with problem/callback/function declarations you can
> see/experiment with it in this branch
> https://github.com/mingodad/GLPK/tree/local-set-para
> m
> , look at
> https://github.com/mingodad/GLPK/blob/local-set-param/examples/shikaku
> -if.mod
> and
> https://github.com/mingodad/GLPK/blob/local-set-param/examples/test-if
> .mod
> to see it's usage.
>
> ====
>
> for{i in 1..4} {
>      printf "now we are at %d\n", i;
>      if i mod 2 = 0 then { #assert when missing "= 0"
>          param lp := i+10;
>          set ls := {1..i+1};
>          printf "nested if lp = %d\n", lp;
>          display ls;
>      }
>      param lp := i+20;
>      set ls := {1..i+2};
>      printf "nested for lp = %d\n", lp;
>      display ls;
> }
>
> ====
>
> Any comment/suggestion is welcome !
>
> Cheers !
>
>
>

I guess the next step will be implementation of classes? ;)



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