On Tuesday, 28 August 2018 at 17:53:36 UTC, H. S. Teoh wrote:
On Tue, Aug 28, 2018 at 10:20:06AM -0700, Manu via
D has no way to express head-const, and it turns out it's a
tremendously useful concept.
I can live without head-const... but what *really* makes const
painful for me is the lack of head-mutable. I.e., given a const
container (which implies const objects), there is no universal
way to obtain a mutable reference to said const objects, unless
you tread into UB territory by forcefully casting it away.
This makes const so limited in applicability that, for the most
part, I've given up using const at all, in spite of having
tried quite hard to use it as much as possible for years.
Simen's opHeadMutable [0] was pretty good solution to this const
range stuff, but for some reason (not specified by anyone in the
thread) it didn't seem to catch on :/
[0]
https://forum.dlang.org/post/[email protected]
