• Andrey (4/12) Aug 30 2018 Hello,
• Basile B. (7/20) Aug 30 2018 Add a scope :
• drug (46/59) Aug 30 2018 static foreach will be lowered to:
• Andrey (2/3) Aug 30 2018 Thanks everybody. Works!

Andrey <saasecondbox yandex.ru> writes:

Hello,
is it possible to declare an internal variable in "static 
foreach" and on each iteration assign something to it?
Example:
static foreach(arg; SomeAliasSeq)
{
    internal = arg[0].converted;    // a shortcut for expression 
 "arg[0].converted"

    static if(internal.length == 0) { ... }
    else static if(internal.isNull) { ... }
    else { ... }
}

Basile B. <b2.temp gmx.com> writes:

On Thursday, 30 August 2018 at 08:19:47 UTC, Andrey wrote:
 Hello,
 is it possible to declare an internal variable in "static 
 foreach" and on each iteration assign something to it?
 Example:
static foreach(arg; SomeAliasSeq)
{
    internal = arg[0].converted;    // a shortcut for 
 expression "arg[0].converted"

    static if(internal.length == 0) { ... }
    else static if(internal.isNull) { ... }
    else { ... }
}


Add a scope :

static foreach(arg; SomeAliasSeq)
{{
}}

And this should work without complaint about "internal" already 
existing.

drug <drug2004 bk.ru> writes:

30.08.2018 11:19, Andrey пишет:
 Hello,
 is it possible to declare an internal variable in "static foreach" and 
 on each iteration assign something to it?
 Example:
 static foreach(arg; SomeAliasSeq)
 {
    internal = arg[0].converted;    // a shortcut for expression 
 "arg[0].converted"

    static if(internal.length == 0) { ... }
    else static if(internal.isNull) { ... }
    else { ... }
 }


static foreach will be lowered to:
```
{
     auto internal = SomeAliasSeq[0][0].converted;

     static if(internal.length == 0) { ... }
     else static if(internal.isNull) { ... }
     else { ... }

     auto internal = SomeAliasSeq[1][0].converted;

     static if(internal.length == 0) { ... }
     else static if(internal.isNull) { ... }
     else { ... }

     ...

     auto internal = SomeAliasSeq[N][0].converted;   // N == 
SomeAliasSeq.length

     static if(internal.length == 0) { ... }
     else static if(internal.isNull) { ... }
     else { ... }
}
```
if you use scope it will be
```
{
     {
         auto internal = SomeAliasSeq[0][0].converted;

         static if(internal.length == 0) { ... }
         else static if(internal.isNull) { ... }
         else { ... }
     }

     {
         auto internal = SomeAliasSeq[1][0].converted;

         static if(internal.length == 0) { ... }
         else static if(internal.isNull) { ... }
         else { ... }
     }

     ...

     {
         auto internal = SomeAliasSeq[N][0].converted;   // N == 
SomeAliasSeq.length

         static if(internal.length == 0) { ... }
         else static if(internal.isNull) { ... }
         else { ... }
     }
}
```
every instance of internal variable will be defined in its own scope

Andrey <saasecondbox yandex.ru> writes:

On Thursday, 30 August 2018 at 09:49:15 UTC, drug wrote:
 30.08.2018 11:19, Andrey пишет:

Thanks everybody. Works!