http://d.puremagic.com/issues/show_bug.cgi?id=10904

           Summary: "%(%s %)" format string support for
                    std.container.Array too
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: bearophile_hugs@eml.cc


--- Comment #0 from bearophile_hugs@eml.cc 2013-08-26 14:02:29 PDT ---
import std.stdio: writefln;
import std.container: Array;
void main() {
    int[10] a1;
    writefln("%(%d %)", a1);
    Array!int a2;
    a2.length = 10;
    writefln("%(%d %)", a2);
}


With dmd 2.064alpha it gives a run-time error:

std.format.FormatException@...\dmd2\src\phobos\std\format.d(2472): Expected '%s' format specifier for type 'Array!int'

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hsteoh@quickfur.ath.cx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hsteoh@quickfur.ath.cx


--- Comment #1 from hsteoh@quickfur.ath.cx 2013-08-26 22:09:28 PDT ---
Hmm. Looking at the code, it seems that %(...%) _should_ be able to support any
input range, so if you write writefln("%(...%)", a1[]);, it should work, I
think.

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--- Comment #2 from hsteoh@quickfur.ath.cx 2013-08-26 22:11:26 PDT ---
OK, confirmed that using opSlice (i.e., a2[]) works.

It's not as nice, though. We *could* implement a suitable version of toString that will get picked up by std.format without needing to write [].

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Dmitry Olshansky <dmitry.olsh@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dmitry.olsh@gmail.com


--- Comment #3 from Dmitry Olshansky <dmitry.olsh@gmail.com> 2013-08-27 05:19:47 PDT ---
(In reply to comment #2)
> OK, confirmed that using opSlice (i.e., a2[]) works.
> 
> It's not as nice, though. We *could* implement a suitable version of toString that will get picked up by std.format without needing to write [].

Well, that would going way too long in the wrong direction. %(..%) prints
ranges, period. Leave containers alone :)

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bearophile_hugs@eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


--- Comment #4 from bearophile_hugs@eml.cc 2013-08-27 05:56:43 PDT ---
(In reply to comment #3)

> Well, that would going way too long in the wrong direction. %(..%) prints
> ranges, period. Leave containers alone :)

OK, I close down this ER. Thank you for all the answers.

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