On 19/03/12 06:43, H. S. Teoh wrote:
While testing my AA implementation on existing AA-related bug, I came
across this issue:
http://d.puremagic.com/issues/show_bug.cgi?id=7602
Upon playing around a bit with the sample code given in the bug, I
managed to find a code snippet that would cause this code:
if (impl !is null) { ... }
to actually execute the code inside the if-statement body ***even when
impl is null***, while running in CTFE.
I've bumped the severity to critical because something is very very
wrong with this.
T
Yes. The existing D2 AA implementation is hopelessly broken.
You have to understand that the whole implementation of AAs in D2 is a
HACK. It is extremely complicated and the slightest change to any code
in the compiler or the runtime can break it. Basically CTFE has to
reverse-engineer the druntime code in order to make it to work.
It's not an implementation issue, it's a fundamental design flaw.
I do not understand why it still part of the compiler after we agreed to
roll back to the D1 version.
