www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 22174] New: destroy should be nogc when class destructor is

https://issues.dlang.org/show_bug.cgi?id=22174

          Issue ID: 22174
           Summary: destroy should be  nogc when class destructor is  nogc
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: druntime
          Assignee: nobody puremagic.com
          Reporter: sbuhesap gmail.com

Pretty much same as the issue summary: destroy should be  nogc when class
destructor is  nogc.

A piece of code that should work but doesn't:

```D
import core.stdc.stdlib;
import core.lifetime;

class Example {
    int x;

    ~this()  nogc {}
}

void main()  nogc {
    enum size = __traits(classInstanceSize, Example);
    auto pointer = malloc(size)[0..size];
    scope(exit) free(pointer.ptr);

    Example ex = emplace!(Example)(pointer); // Error: ` nogc` function `D
main` cannot call non- nogc function `object.destroy!(true, Example).destroy`
    destroy(ex);
}
```

There should be a  nogc overload for destroy that allows people to use class
destructors. Currently there is no way to call destroy in a  nogc function
without breaking the type system. 

Or just un-deprecating class allocators / dealloctors would work too.

A recent discussion I found about this:
https://forum.dlang.org/thread/jsrjgmeblfukwhqbwjab forum.dlang.org

--
Aug 03