On Tuesday, 22 December 2020 at 22:12:29 UTC, Rekel wrote:
According to the D slice article
(https://dlang.org/articles/d-array-article.html), slices do
not care where they start, only where they end, when checking
whether expanding in place is permitable, or at least that is
what I understood regarding it.
Now I'm unsure how to check this, I tried to a bit using the
online editor and a bit of pointer usage which seemed to
confirm my suspicion, but does this mean that taking a (small)
slice at the end of a (possibly) very large dynamic array can
lead to problematic behavior?
No there's some runtime and GC magic under the hood. Appending on
the slice is more like a smart "copy on append" operation so "a"
will always ends with -1 and "b" with 2. It's described here :
https://dlang.org/articles/d-array-article.html#how-it-works
