https://issues.dlang.org/show_bug.cgi?id=15941
Issue ID: 15941 Summary: Regression: rbtree no longer supports classes Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: regression Priority: P1 Component: phobos Assignee: nob...@puremagic.com Reporter: jbc.enge...@gmail.com ``` class A {} RedBlackTree!(A, "cast(void*)a < cast(void*)b") tree; ``` This used to work, but now no longer works because of the addition of rbtree.toString. With a nice instantiation error: /Library/D/dmd/src/phobos/std/format.d(2916): Error: template instance std.format.formatObject!(void delegate(const(char)[]), const(A), char) does not match template declaration formatObject(Writer, T, Char)(ref Writer w, ref T val, ref FormatSpec!Char f) if (hasToString!(T, Char)) /Library/D/dmd/src/phobos/std/format.d(2649): Error: template instance std.format.formatValue!(void delegate(const(char)[]), const(A), char) error instantiating /Library/D/dmd/src/phobos/std/format.d(2435): instantiated from here: formatElement!(void delegate(const(char)[]), const(A), char) /Library/D/dmd/src/phobos/std/format.d(3142): instantiated from here: formatRange!(void delegate(const(char)[]), RBRange!(const(RBNode!(A))*), char) /Library/D/dmd/src/phobos/std/container/rbtree.d(1679): instantiated from here: formatValue!(void delegate(const(char)[]), RBRange!(const(RBNode!(A))*), char) /Users/johan/ldc/johan/ddmd/root/array.d(217): instantiated from here: RedBlackTree!(A, "cast(void*)a < cast(void*)b", false) --