[Mono-bugs] [Bug 78000][Nor] New - Change in C# invalid conversion.

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Mon Apr 3 15:01:52 EDT 2006


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Changed by miguel at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=78000

--- shadow/78000	2006-04-03 15:01:52.000000000 -0400
+++ shadow/78000.tmp.28008	2006-04-03 15:01:52.000000000 -0400
@@ -0,0 +1,46 @@
+Bug#: 78000
+Product: Mono: Compilers
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: C#
+AssignedTo: rharinath at novell.com                            
+ReportedBy: miguel at ximian.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Change in C# invalid conversion.
+
+Seems like Microsoft fixed a bug in their C# 1.0 compiler, as reported by
+Jon Jagger:
+
+
+interface I { }
+class A : I { }
+class B
+{
+    public static implicit operator A(B from)
+    {
+        return new A();
+    }
+}
+
+class App
+{
+    public static void Main()
+    {
+        B b = new B();
+        I i = b;
+    }
+}
+
+Under .NET the last line (converting from B to I) does _not_ compile. 
+Under Mono it does.
+In .NET 1.1 it _did_ compile but after I queried it with Peter Hallam he 
+confirmed it was a bug.
+As far as I can tell the spec needs tightening to cover this case.


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