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digitalmars.D.bugs - [Issue 8260] New: * used three or more times on an array inside std.format.formattedRead

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8260

           Summary: * used three or more times on an array inside
                    std.format.formattedRead
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc


--- Comment #0 from bearophile_hugs eml.cc 2012-06-18 05:12:17 PDT ---
import std.format;
void main() {
    int[3] row;
    auto text = "10 20 30";
    formattedRead(text, "%(%d %)", row);
}


DMD 2.060alpha:

...\dmd2\src\phobos\std\format.d(555): Error: using * on an array is
deprecated; use *(_param_2).ptr instead
...\dmd2\src\phobos\std\format.d(566): Error: using * on an array is
deprecated; use *(_param_2).ptr instead
test.d(5): Error: template instance
std.format.formattedRead!(string,char,uint[3u]) error instantiating


Part inside formattedRead, that uses * three times:

        alias typeof(*args[0]) A;
        static if (isTuple!A)
        {
            foreach (i, T; A.Types)
            {
                (*args[0])[i] = unformatValue!(T)(r, spec);
                skipUnstoredFields();
            }
        }
        else
        {
            *args[0] = unformatValue!(A)(r, spec);

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8260


Kenji Hara <k.hara.pg gmail.com> changed:

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


--- Comment #1 from Kenji Hara <k.hara.pg gmail.com> 2012-06-18 05:47:29 PDT ---
The bug is in your code.

void main() {
    int[3] row;
    auto text = "10 20 30";
  //formattedRead(text, "%(%d %)", row);   // bad
    formattedRead(text, "%(%d %)", &row);  // OK
}

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prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=8260


timon.gehr gmx.ch changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |timon.gehr gmx.ch
         Resolution|INVALID                     |
            Summary|* used three or more times  |* used three or more times
                   |on an array inside          |on an array inside
                   |std.format.formattedRead    |std.format.formattedRead
                   |                            |and not guarded by template
                   |                            |constraint


--- Comment #2 from timon.gehr gmx.ch 2012-06-18 06:11:30 PDT ---
Phobos should catch the error with a template constraint instead of showing
confusing errors in the template body.

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