Re: need help to work around float union non-zero init

[monkyyy via Digitalmars-d-learn]

On Friday, 20 September 2024 at 09:38:54 UTC, Dakota wrote:
I need my struct defined as `isZeroInit`,  so can I can import 
them as `di` file.  (this also reduce build size)


But I find this problem with float inside union:


```d
struct test_t {
    union {
        int i32;
        float f32;
    }
}

static assert(__traits(isZeroInit, test_t) );
```

```sh
Error: static assert:  `__traits(isZeroInit, test_t)` is false
```

I consider this is compiler bug (it may take years to get 
fixed), so I am here to ask any way to workaround this problem?

```d
union somevalue{
    int i32;
    float f32;
}

struct test_t{
    somevalue a=void;
}

static assert(__traits(isZeroInit, test_t));
unittest{
  test_t foo;
  assert(foo.a.i32==0);
}
```

this version compiles, but you probably need to provide more 
details