• d-bugmail puremagic.com (35/35) Feb 21 2018 https://issues.dlang.org/show_bug.cgi?id=18486

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=18486

          Issue ID: 18486
           Summary: std.format cannot format const objects
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody puremagic.com
          Reporter: jack jackstouffer.com

========
import std.format;

void main()
{
    static class C {}
    const(C) c;
    format("%s", c);
}
========

/dlang/dmd/linux/bin64/../../src/phobos/std/format.d(3570): Error: template
instance std.format.formatObject!(Appender!string, const(C), char) does not
match template declaration formatObject(Writer, T, Char)(ref Writer w, ref T
val, ref const FormatSpec!Char f) if (hasToString!(T, Char))
/dlang/dmd/linux/bin64/../../src/phobos/std/format.d(1753): Error: template
instance std.format.formatValueImpl!(Appender!string, const(C), char) error
instantiating
/dlang/dmd/linux/bin64/../../src/phobos/std/format.d(567):        instantiated
from here: formatValue!(Appender!string, const(C), char)
/dlang/dmd/linux/bin64/../../src/phobos/std/format.d(5831):        instantiated
from here: formattedWrite!(Appender!string, char, const(C))
onlineapp.d(7):        instantiated from here: format!(char, const(C))

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