Why are immutable fields with initializers deprecated?
A recent discussion https://github.com/D-Programming-Language/dmd/pull/3452 brought up a matter I'd forgotten - struct fields that are immutable and have initializer are deprecated. Why? Andrei
Re: Why are immutable fields with initializers deprecated?
On Tue, 29 Apr 2014 13:09:01 -0400, Andrei Alexandrescu seewebsiteforem...@erdani.org wrote: A recent discussion https://github.com/D-Programming-Language/dmd/pull/3452 brought up a matter I'd forgotten - struct fields that are immutable and have initializer are deprecated. Why? I think possibly it has to do with the fact that they originally did not get stored per-instance. I remember a conversation about this (being a bad thing), but have not searched the NG for it. -Steve
Re: Why are immutable fields with initializers deprecated?
In future release, non-static const or immutable field will be made an
instance field.
struct S
{
immutable int x = 1;
}
static assert(S.sizeof == int.sizeof); // will succeed in the future
So current implicit static behavior is now deprecated.
Related:
http://dlang.org/changelog#staticfields
http://dlang.org/changelog#staticfields2
Kenji Hara
2014-04-30 2:09 GMT+09:00 Andrei Alexandrescu via Digitalmars-d
digitalmars-d@puremagic.com:
A recent discussion https://github.com/D-Programming-Language/dmd/pull/
3452 brought up a matter I'd forgotten - struct fields that are immutable
and have initializer are deprecated.
Why?
Andrei
Re: Why are immutable fields with initializers deprecated?
On Tuesday, 29 April 2014 at 17:11:50 UTC, Steven Schveighoffer wrote: On Tue, 29 Apr 2014 13:09:01 -0400, Andrei Alexandrescu seewebsiteforem...@erdani.org wrote: A recent discussion https://github.com/D-Programming-Language/dmd/pull/3452 brought up a matter I'd forgotten - struct fields that are immutable and have initializer are deprecated. Why? I think possibly it has to do with the fact that they originally did not get stored per-instance. I remember a conversation about this (being a bad thing), but have not searched the NG for it. http://dlang.org/changelog#staticfields2
Re: Why are immutable fields with initializers deprecated?
On 4/29/14, 10:18 AM, Kenji Hara via Digitalmars-d wrote:
In future release, non-static const or immutable field will be made an
instance field.
struct S
{
immutable int x = 1;
}
static assert(S.sizeof == int.sizeof); // will succeed in the future
So current implicit static behavior is now deprecated.
Related:
http://dlang.org/changelog#staticfields
http://dlang.org/changelog#staticfields2
Kenji Hara
That makes sense - thanks Nick and Kenji! -- Andrei
