http://d.puremagic.com/issues/show_bug.cgi?id=8553
Summary: templated interface methods (virutal?) and linker
missing symbols
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nob...@puremagic.com
ReportedBy: michal.min...@gmail.com
--- Comment #0 from Michal Minich <michal.min...@gmail.com> 2012-08-15 13:59:27
PDT ---
module main;
class Visitor (T) {
void visit (KlazzDeriv) { }
}
interface IKlazz {
void accept (R) (Visitor!(R));
}
abstract class Klazz : IKlazz {
// uncomment this to get "non-virtual functions cannot be abstract"
// abstract void accept (R) (Visitor!(R));
// uncomment this line to compile
// void accept (R) (Visitor!(R) v) { }
}
class KlazzDeriv : Klazz {
void accept (R) (Visitor!(R) v) { v.visit(this); }
}
void main () {
// change Klazz to KlazzDeriv and it compiles
Klazz k = new KlazzDeriv;
// is accept virtual call ? is it supported for templated interface methods
?
k.accept (new Visitor!int);
}
dmd 2.060 on both systems
On 64 bit linux
main.o: In function `_Dmain':
main.d:25: undefined reference to
`_D4main6IKlazz13__T6acceptTiZ6acceptMFC4main14__T7VisitorTiZ7VisitorZv'
collect2: error: ld returned 1 exit status
on 32 bit win xp
OPTLINK (R) for Win32 Release 8.00.12
Copyright (C) Digital Mars 1989-2010 All rights reserved.
http://www.digitalmars.com/ctg/optlink.html
main.obj(main)
Error 42: Symbol Undefined
_D4main6IKlazz13__T6acceptTiZ6acceptMFC4main14__T7VisitorTiZ7VisitorZv
--- errorlevel 1
demangled missing symbol is void
main.IKlazz.accept!(int).accept(main.Visitor!(int).Visitor)
are currently templated virutal members supprted? Anyway ... it should not
result in linker error.
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