Would the ownership model make D lang as complicated as Rust?

[Paul Backus]

On Wednesday, 18 November 2020 at 01:21:12 UTC, Walter Bright 
wrote:
> On 11/15/2020 6:34 AM, Timon Gehr wrote:
>> And an unsound interface between the two so you can have your 
>> O/B and safety type checks and even get the luxury of some 
>> memory corruption anyway.
>
> In Rust there are unsafe (i.e. unsound) functions, too. It's 
> not possible to make Rust work without them.

In Rust, the borrow checker is still enabled in unsafe functions:

> You can take five actions in unsafe Rust, called unsafe 
> superpowers, that you can’t in safe Rust. Those superpowers 
> include the ability to:
>
>    * Dereference a raw pointer
>    * Call an unsafe function or method
>    * Access or modify a mutable static variable
>    * Implement an unsafe trait
>    * Access fields of unions
>
> It’s important to understand that unsafe doesn’t turn off the 
> borrow checker or disable any other of Rust’s safety checks: if 
> you use a reference in unsafe code, it will still be checked.

Source: https://doc.rust-lang.org/book/ch19-01-unsafe-rust.html