• ryuukk_ (12/12) Jan 25 2024 ```D
• Hipreme (5/17) Jan 25 2024 You need to slice your `id` variable to be the required size.
• ryuukk_ (4/27) Jan 25 2024 That's dumb, compiler knows that ``id`` has enough room and it
• ryuukk_ (8/8) Jan 25 2024 ```D
• Stefan Koch (2/11) Jan 25 2024 Raise a bug, I'll fix it.
• Johan (11/24) Jan 25 2024 Hmm.
• ryuukk_ (3/28) Jan 25 2024 I created an issue and included that case

ryuukk_ <ryuukk.dev gmail.com> writes:

```D
void main()
{
     char[32] id = 0;
     const(char)* str = "hello";

     id = str[0 .. 6];
}

```


it should be a simple memcpy, why DMD complain?

``onlineapp.d(6): Error: mismatched array lengths 32 and 6 for 
assignment `id[] = str[0..6]```

I'm too tired to notice something obvious?

Hipreme <msnmancini hotmail.com> writes:

On Thursday, 25 January 2024 at 15:20:01 UTC, ryuukk_ wrote:
 ```D
 void main()
 {
     char[32] id = 0;
     const(char)* str = "hello";

     id = str[0 .. 6];
 }

 ```


 it should be a simple memcpy, why DMD complain?

 ``onlineapp.d(6): Error: mismatched array lengths 32 and 6 for 
 assignment `id[] = str[0..6]```

 I'm too tired to notice something obvious?


You need to slice your `id` variable to be the required size. 
You're trying to assign the complete `id` variable to a slice of 
size 6.

i.e: that should be used instead `id[0..6] = str[0..6]`

ryuukk_ <ryuukk.dev gmail.com> writes:

On Thursday, 25 January 2024 at 15:22:35 UTC, Hipreme wrote:
 On Thursday, 25 January 2024 at 15:20:01 UTC, ryuukk_ wrote:
 ```D
 void main()
 {
     char[32] id = 0;
     const(char)* str = "hello";

     id = str[0 .. 6];
 }

 ```


 it should be a simple memcpy, why DMD complain?

 ``onlineapp.d(6): Error: mismatched array lengths 32 and 6 for 
 assignment `id[] = str[0..6]```

 I'm too tired to notice something obvious?


 You need to slice your `id` variable to be the required size. 
 You're trying to assign the complete `id` variable to a slice 
 of size 6.

 i.e: that should be used instead `id[0..6] = str[0..6]`

That's dumb, compiler knows that ``id`` has enough room and it 
should do a simple memcpy, i shouldn't have to do that myself..

i'll stick to calling memcpy.. why stray away from C to do worse

ryuukk_ <ryuukk.dev gmail.com> writes:

```D
void main()
{
     char[32] id = 0;
     id = "hello";
}

```

this works fine, and that is what i expect for the example above..

Stefan Koch <uplink.coder googlemail.com> writes:

On Thursday, 25 January 2024 at 15:39:08 UTC, ryuukk_ wrote:
 ```D
 void main()
 {
     char[32] id = 0;
     id = "hello";
 }

 ```

 this works fine, and that is what i expect for the example 
 above..

Raise a bug, I'll fix it.

Johan <j j.nl> writes:

On Thursday, 25 January 2024 at 16:07:44 UTC, Stefan Koch wrote:
 On Thursday, 25 January 2024 at 15:39:08 UTC, ryuukk_ wrote:
 ```D
 void main()
 {
     char[32] id = 0;
     id = "hello";
 }

 ```

 this works fine, and that is what i expect for the example 
 above..

 Raise a bug, I'll fix it.

Hmm.

To me, the bug is that string assignment to the array is allowed. 
Because this also compiles without any compile error:

```D
void main()
{
     char[4] id;
     id = "hello asdad";
}
```

ryuukk_ <ryuukk.dev gmail.com> writes:

On Thursday, 25 January 2024 at 17:50:57 UTC, Johan wrote:
 On Thursday, 25 January 2024 at 16:07:44 UTC, Stefan Koch wrote:
 On Thursday, 25 January 2024 at 15:39:08 UTC, ryuukk_ wrote:
 ```D
 void main()
 {
     char[32] id = 0;
     id = "hello";
 }

 ```

 this works fine, and that is what i expect for the example 
 above..

 Raise a bug, I'll fix it.

 Hmm.

 To me, the bug is that string assignment to the array is 
 allowed. Because this also compiles without any compile error:

 ```D
 void main()
 {
     char[4] id;
     id = "hello asdad";
 }
 ```


I created an issue and included that case


https://issues.dlang.org/show_bug.cgi?id=24355