Class member initialization with new points to a single instance?

evilrat evilrat666 at gmail.com
Wed Jun 9 18:04:54 UTC 2021


On Wednesday, 9 June 2021 at 17:56:24 UTC, Gregor Mückl wrote:
> Consider the following code:
>
> ```d
> class Foo {  }
>
> class Bar { Foo foo = new Foo(); }
>
> void main()
> {
> 	Bar b1 = new Bar();
> 	Bar b2 = new Bar();
>
> 	assert(b1.foo != b2.foo);
> }
> ```
>
> The assert fails. This is completely surprising to me. Is this 
> actually expected?

By design.
What you see is CTFE instance shared through class member 
initializer.

Use Bar ctor instead if you want them to be unique.

Yep, confusing for the first time.


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