why is the 'return' attribute not working?

[vit]

On Sunday, 1 May 2022 at 21:09:14 UTC, mesni wrote:
> It doesn't throw any error
> ```d
> import std.stdio;
>
> void main()
> {
>     int id = IdWrap().getID;
>     writeln("use: ", id);
> }
>
> struct IdWrap
> {
>     private int _id;
>
>     int getID() return
>     {
>     	return _id;
>     }
>
>     ~this(){
>     	writeln("delete id:(");
>     }
> }
> ```
>
> Moreover, if you return `this.someSlice.ptr` in the return 
> method in a structure, there will also be no error.

`return` attribute has effect only if return type of function has 
indirection. For basic types like int has no effect.

Example:
```d
import std.stdio;

void main()@safe
{
     int* id = IdWrap().getID;  //Error: address of variable 
`__slIdWrap40` assigned to `id` with longer lifetime
     writeln("use: ", id);
}

struct IdWrap
{
     private int _id;

     @property int* getID()@safe return
     {
     	return &_id;
     }

     ~this()@safe{
     	writeln("delete id:(");
     }
}
```