https://issues.dlang.org/show_bug.cgi?id=8851

Robert Schadek <rburners@gmail.com> changed:

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                 CC|                            |rburners@gmail.com

--- Comment #10 from Robert Schadek <rburners@gmail.com> ---
anyone working on this currently?

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #11 from monarchdodra@gmail.com ---
(In reply to Robert Schadek from comment #10)
> anyone working on this currently?

No one that I know of. Although 'only' was recently introduced that helped work around the issue, it is still in need of fixing.

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #12 from Andrej Mitrovic <andrej.mitrovich@gmail.com> ---
I've tried using only but it didn't really work.

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #13 from Robert Schadek <rburners@gmail.com> ---
(In reply to Andrej Mitrovic from comment #12)
> I've tried using only but it didn't really work.

example?

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #14 from Andrej Mitrovic <andrej.mitrovich@gmail.com> ---
import std.string;

void main()
{
    char sep = '|';
    string z = ["foo", "bar"].join(sep.only);
}

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #15 from monarchdodra@gmail.com ---
(In reply to Andrej Mitrovic from comment #14)
> import std.string;
> 
> void main()
> {
>     char sep = '|';
>     string z = ["foo", "bar"].join(sep.only);
> }

I'll assume you also imported std.range, and got this error?
Error: template std.array.join cannot deduce function from argument types ...

It seems the issue here is that the template restrictions are overzealous in that it checks for exact element type matching, rather than checking if they have a common type (Or at the very least, if ElementType!Sep is implicitly convertible to ElementType!(ElementType!RoR)).

As a workaround, using an (explicit) dchar only works.

//----
import std.range;
import std.stdio;

void main()
{
    ["foo", "bar"].join(dchar('|').only).writeln();
}
//----

So Jonathan's original
assesment(https://issues.dlang.org/show_bug.cgi?id=8851#c1) was also correct
(it's a dual issue I guess)

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #16 from Andrej Mitrovic <andrej.mitrovich@gmail.com> ---
Yeah, looks like we may have to make multiple fixes here? Anyway, it would be nice to get this taken care of. :)

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #17 from Robert Schadek <rburners@gmail.com> ---
I'm on it

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https://issues.dlang.org/show_bug.cgi?id=8851

Andrei Alexandrescu <andrei@erdani.com> changed:

           What    |Removed                     |Added
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           Assignee|nobody@puremagic.com        |rburners@gmail.com

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https://issues.dlang.org/show_bug.cgi?id=8851

--- Comment #18 from Robert Schadek <rburners@gmail.com> ---
issue 5542 refers to the same bug

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