[Mono-bugs] [Bug 21255] Changed - CS527 error incorrectly reported + segfault
6 Mar 2002 01:15:07 -0000
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Changed by email@example.com.
--- shadow/21255 Tue Mar 5 16:06:10 2002
+++ shadow/21255.tmp.1115 Tue Mar 5 20:15:07 2002
@@ -1,22 +1,21 @@
Product: Mono/Class Libraries
Summary: CS527 error incorrectly reported + segfault
Description of Problem:
mcs built on win32 from CVS update at approx 12:00 AM 3/1/02
mono on linux built from CVS update at approx 12:00 AM 3/2/02
@@ -115,7 +114,31 @@
Well, this is also a bug in Windows anyways. The problem is that we
only look for implementation methods that are being defined by the
current class. It did not occur to me that the implementation might
be on a parent.
I will start working on this now.
+------- Additional Comments From firstname.lastname@example.org 2002-03-05 20:15 -------
+OK, on the C# end of things, this turned out to be a nasty little
+"feature" of the runtime and the compiler.
+The attached program will compile with some bizarre flags to allow the
+`look in my parent for an interface method implementation' (hidebysig,
+ewslot, virtual, final). Otherwise this hack does not work.
+Now, this is tricky, because if nobody ever implements the interface,
+the flags are completely different *IN THE BASE METHOD*.
+So this sounded fishy. I split up the code in two: the interface and
+the base class from the class that inherits the class and implements
+And surprise: to work around this problem, they do create an explicit
+implementation that proxies the call to the original caller. So this
+is more inneficient than the plain call.
+Since I can not change the method definition once I have created the
+MethodBuilder without major changes to the compiler, I will just keep
+the proxy code in place.