Is this even possible?

klondike.d(155): Error: no identifier for declarator c
klondike.d(155): Error: declaration expected, not =

struct FoundationPile
{
    Card[] up;    // all cards are face up on the Foundation
}

FoundationPile[4] foundations;


static if(true)
{
    int r = 2;
    int c = 40;
    static foreach(i ; foundations)
    {
        immutable string brackets = "\033[" ~ to!string(r) ~ ";" ~ to!string(c) ~ "H";			
        c = c + 10;   // line 155
    }			
}

On Monday, 9 September 2019 at 19:08:17 UTC, WhatMeWorry wrote:
> Is this even possible?

what are you trying to do?

if c is static, it just needs to be initialized by a helper function, like

int helper() {
    int c = 60;
   foreach(f; foundations)
     c += 10;
   return c;
}

static int c = helper(); // it initializes based on teh function now

On Monday, 9 September 2019 at 19:08:17 UTC, WhatMeWorry wrote:
>
> struct FoundationPile {
>     Card[] up;    // all cards are face up on the Foundation
> }
>
> FoundationPile[4] foundations;
>
> static if(true) {
>     int r = 2;
>     int c = 40;
>     static foreach(i ; foundations) {
>         immutable string brackets = "\033[" ~ to!string(r) ~ ";" ~ to!string(c) ~ "H";			
>         c = c + 10;   // line 155
>     }			
> }

NB
  dont use name "i" for foreach/ranges,
  foreach can be used with index too,
  use "el" as "element" or "it" as "iterator" or just "something"

> static if(true) {
>     enum r = 2, c = 40; // bad names too
>     static foreach( idx, el; foundations) {
>         immutable string brackets = "\033[" ~ to!string(r) ~ ";" ~ to!string(c + idx*10) ~ "H";			
>     }			
> }

On 09/09/2019 12:08 PM, WhatMeWorry wrote:
> Is this even possible?

No because there can't be expressions at module scope.

> static if(true)
> {
>      int r = 2;
>      int c = 40;

Those are fine.

>      static foreach(i ; foundations)
>      {
>          immutable string brackets = "\033[" ~ to!string(r) ~ ";" ~
> to!string(c) ~ "H";

That's fine as well.

>          c = c + 10;   // line 155

That expression cannot appear at module scope. (In case it's not clear, 'static if' and 'static foreach' disappear after a stage of compilation and their contents are left behind at module scope.)

Ali

On 09/09/2019 01:59 PM, Ali Çehreli wrote:
> On 09/09/2019 12:08 PM, WhatMeWorry wrote:
>  > Is this even possible?
>
> No because there can't be expressions at module scope.

Attempting to correct myself: I think only declarations are allowed at module scope. Non-compile-time statements like for, switch, etc. cannot appear at module scope either.

Ali

On Monday, 9 September 2019 at 19:12:34 UTC, Adam D. Ruppe wrote:
> On Monday, 9 September 2019 at 19:08:17 UTC, WhatMeWorry wrote:
>> Is this even possible?
>
> what are you trying to do?
>
> if c is static, it just needs to be initialized by a helper function, like
>
> int helper() {
>     int c = 60;
>    foreach(f; foundations)
>      c += 10;
>    return c;
> }
>
> static int c = helper(); // it initializes based on teh function now

Oops. I'm trying to build up a complex formatting string of Console Virtual Terminal Sequences.  Should be ~= or is that =~.  I never can remember.

immutable string brackets ~= "\033[" ~ to!string(r) ~ ";" ~ to!string(c) ~ "H";