I was surprised by a compiler message saying that std.stdio.readln() (and specifically the overload without arguments) is not safe but @system.

Actually I was using it only to pause execution until the user presses Enter. So how else could I do this within a @safe environment?

And more generally, is it possible to get user console input in a @safe way?

On Thursday, 9 March 2017 at 22:53:59 UTC, XavierAP wrote:
> And more generally, is it possible to get user console input in a @safe way?

Just wrap it in a @trusted function.

On Thursday, 9 March 2017 at 23:55:35 UTC, Adam D. Ruppe wrote:
> Just wrap it in a @trusted function.

I knew this answer already of course ;) but I take it as implying that there is no other way.

Actually I really wonder why std.stdio.readln() itself is not flagged @trusted. I wouldn't think such a function skips any buffer bounds checking, even in -release -- having to wait for user input anyway performance is no issue.

On Friday, 10 March 2017 at 00:42:35 UTC, XavierAP wrote:
> On Thursday, 9 March 2017 at 23:55:35 UTC, Adam D. Ruppe wrote:
>> Just wrap it in a @trusted function.
>
> I knew this answer already of course ;) but I take it as implying that there is no other way.
>
> Actually I really wonder why std.stdio.readln() itself is not flagged @trusted. I wouldn't think such a function skips any buffer bounds checking, even in -release -- having to wait for user input anyway performance is no issue.

Its use of __gshared. Making it shared is non trivial.