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: nob...@puremagic.com Reporter: j...@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)) --