[Issue 12563] std.container.SList.reverse

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12563

--- Comment #2 from bearophile_hugs at eml.cc ---
(In reply to monkeyworks12 from comment #1)
> Why not use std.range.retro? The only downside is that you can't assign the
> result back to the original SList.

A SList is usually implemented with a chain of 2-structs that contain a cargo
plus a forward pointer. So you can't walk them backwards with retro. And indeed
this doesn't compile:

void main() {
    import std.stdio: writeln;
    import std.container: SList;
    import std.range: retro;
    auto list = SList!int([1, 7, 42]);
    list[].writeln;
    list[].retro.writeln;
    list.retro.writeln;
}

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