[Issue 3180] Covariance of delegates/function pointers
https://issues.dlang.org/show_bug.cgi?id=3180 Andrei Alexandrescu changed: What|Removed |Added Version|unspecified |D2 --
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 --- Comment #16 from yebblies 2011-09-18 12:17:32 EST --- (In reply to comment #15) > > Why is "Status" "RESOLVED-FIXED"? I assume you're asking why this report was marked as fixed when delegate contravariance hasn't been implemented? See comment #6 and issue 3075, this is covered by another report which has been rejected. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180
--- Comment #15 from Haruki Shigemori 2011-09-17
09:04:50 PDT ---
import std.stdio;
class Base {}
class Derived : Base {}
class X
{
Base foo() { return new Base; }
}
class Y : X
{
Derived foo() { return new Derived; }
}
void main()
{
// Covariance is good
{
Base delegate() f = delegate Derived() { return new Derived; };
writefln("delegate convariance is <%s>", f().toString() == "a.Derived"
? "OK" : "NG");
}{
static Derived fp() { return new Derived; }
Base function() f = &fp;
writefln("function pointer covariance is <%s>", f().toString() ==
"a.Derived" ? "OK" : "NG");
}
// Contravariance is BAD
{
auto c = new class { void foo(Base){} };
// GOOD
void delegate(Base) f = &c.foo;
f(new Base);
f(new Derived);
// BAD
void delegate(Derived) g = &c.foo;
g(new Derived);
}
}
a.d(33): Error: cannot implicitly convert expression (&c.foo) of type void
delegate(Base) to void delegate(Derived)
---
Why is "Status" "RESOLVED-FIXED"?
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[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added Keywords||patch Severity|normal |critical Walter Bright changed: What|Removed |Added Status|REOPENED|RESOLVED Resolution||FIXED --- Comment #12 from yebblies 2011-09-06 02:02:19 PDT --- Part was fixed by https://github.com/D-Programming-Language/dmd/commit/dfb683f63ec89709b0bf2760ef3b2a249ce320eb Raising importance as while not a regression, this fixes one. (bug 6352) Pull for the remaining common type bugs: https://github.com/D-Programming-Language/dmd/pull/368 --- Comment #13 from yebblies 2011-09-06 02:03:45 PDT --- Part was fixed by https://github.com/D-Programming-Language/dmd/commit/dfb683f63ec89709b0bf2760ef3b2a249ce320eb Raising importance as while not a regression, this fixes one. (bug 6352) Pull for the remaining common type bugs: https://github.com/D-Programming-Language/dmd/pull/368 --- Comment #14 from Walter Bright 2011-09-16 23:28:48 PDT --- https://github.com/D-Programming-Language/dmd/commit/77bed134d06e6314c5b65465068f554b3f2c2e8d -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added Keywords||patch Severity|normal |critical --- Comment #12 from yebblies 2011-09-06 19:02:19 EST --- Part was fixed by https://github.com/D-Programming-Language/dmd/commit/dfb683f63ec89709b0bf2760ef3b2a249ce320eb Raising importance as while not a regression, this fixes one. (bug 6352) Pull for the remaining common type bugs: https://github.com/D-Programming-Language/dmd/pull/368 --- Comment #13 from yebblies 2011-09-06 19:03:45 EST --- Part was fixed by https://github.com/D-Programming-Language/dmd/commit/dfb683f63ec89709b0bf2760ef3b2a249ce320eb Raising importance as while not a regression, this fixes one. (bug 6352) Pull for the remaining common type bugs: https://github.com/D-Programming-Language/dmd/pull/368 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added Keywords||patch Severity|normal |critical --- Comment #12 from yebblies 2011-09-06 19:02:19 EST --- Part was fixed by https://github.com/D-Programming-Language/dmd/commit/dfb683f63ec89709b0bf2760ef3b2a249ce320eb Raising importance as while not a regression, this fixes one. (bug 6352) Pull for the remaining common type bugs: https://github.com/D-Programming-Language/dmd/pull/368 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added CC||clugd...@yahoo.com.au --- Comment #11 from yebblies 2011-09-06 18:49:34 EST --- *** Issue 3267 has been marked as a duplicate of this issue. *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added Keywords|patch | Status|RESOLVED|REOPENED Platform|Other |All Resolution|FIXED | OS/Version|Windows |All --- Comment #10 from yebblies 2011-09-06 18:12:49 EST --- Partial is partial. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 Walter Bright changed: What|Removed |Added Status|NEW |RESOLVED CC||bugzi...@digitalmars.com Resolution||FIXED --- Comment #9 from Walter Bright 2011-09-02 02:38:23 PDT --- Partial fix: https://github.com/D-Programming-Language/dmd/commit/306df8eaa6f8a987f76f401a1e03d8edf1f1e2ae -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added CC||bugzi...@kyllingen.net --- Comment #8 from yebblies 2011-08-19 01:50:28 EST --- *** Issue 6524 has been marked as a duplicate of this issue. *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added CC||zan77...@nifty.com --- Comment #7 from yebblies 2011-06-13 12:16:14 PDT --- *** Issue 4218 has been marked as a duplicate of this issue. *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 3180] Covariance of delegates/function pointers
http://d.puremagic.com/issues/show_bug.cgi?id=3180 yebblies changed: What|Removed |Added Keywords|spec|patch, rejects-valid CC||yebbl...@gmail.com Summary|Need delegate covariance|Covariance of |and contravariance |delegates/function pointers Severity|enhancement |normal --- Comment #6 from yebblies 2011-06-08 22:54:07 PDT --- The enhancement portion of the original report is a dupe of Issue 3075, which has been marked INVALID by Walter. In the comments he states that delegate covariance is supposed to work, so that part of the report is definitely a bug. https://github.com/D-Programming-Language/dmd/pull/96 should fix this report for function pointers. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
