Re: Returning a reference to be manipulated

[Bastiaan Veelo via Digitalmars-d-learn]

On Friday, 14 April 2023 at 00:50:31 UTC, kdevel wrote:
```
ref int foo (ref int i)
{
   return i;
}
ref int bar ()
{
   int i;
   return foo (i);
}

void main ()
{
   import std.stdio;
   auto i = bar;
   i.writeln;
}
```

Up to dmd v2.100.2 I am warned/get an error during compilation:

```
$ dmd returnref2.d
returnref2.d(3): Deprecation: returning `i` escapes a reference 
to parameter `i`
returnref2.d(1):        perhaps annotate the parameter with 
`return`
$ dmd -dip1000 returnref2.d
returnref2.d(3): Error: returning `i` escapes a reference to 
parameter `i`
returnref2.d(1):        perhaps annotate the parameter with 
`return`
```

With later dmd versions (up to including v2.102.2) the code 
compiles without complaints. Is this intended?

I think this is intended. Adding `@safe:` on top makes the 
complaint come back (in dmd  2.102 it is deprecated, in 2.103 it 
is an error).

-- Bastiaan.