On Tuesday, 25 February 2020 at 11:49:50 UTC, Petar Kirov
[ZombineDev] wrote:
On Tuesday, 25 February 2020 at 11:02:40 UTC, wjoe wrote:
[...]
opIndexAssign is the operator used in the following code:
arr[1] = 8;
It returns the element at index 1 (so 8 in this case) by
reference.
This allows you to do:
(arr[1] = 8)++;
assert(arr[1] == 9);
Whether or not you want to support this behavior in your custom
data structure is up to you. It's perfectly valid to return the
element by value or even return void.
Returning void from any custom assignment operator is always a
safe choice. It's possible that some algorithms (e.g. in Phobos
or third-party libraries) may need op*Assign to return
something, but in that unlikely case you'll get a compile-time
error, so it will be an easy fix.
Excellent answer ! Thanks for your fast reply :)
