[Mono-bugs] [Bug 54928][Cos] New - implicit operator cannot convert from struct to decimal

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Changed by yoonkit@yahoo.com.

http://bugzilla.ximian.com/show_bug.cgi?id=54928

--- shadow/54928	2004-02-27 08:19:55.000000000 -0500
+++ shadow/54928.tmp.6764	2004-02-27 08:19:55.000000000 -0500
@@ -0,0 +1,73 @@
+Bug#: 54928
+Product: Mono/Compilers
+Version: unspecified
+OS: 
+OS Details: Win2K
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Cosmetic
+Component: C#
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: yoonkit@yahoo.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: implicit operator cannot convert from struct to decimal
+
+==== Description of Problem:
+Error during compilation when using implicit operators,
+especially with long -> decimal.
+
+==== Steps to reproduce the problem:
+
+    public struct ObjectID
+    {
+        private long _l;
+
+        public ObjectID( long l )
+        { _l = l; }
+
+        public static implicit operator long( ObjectID p )
+        { return p._l; }
+
+        public static implicit operator ObjectID( long l )
+        { return new ObjectID( l ); }
+    }   
+
+1. Make a struct which has a base type of long integer 
+         private long _l;
+2. have a implicit operator 
+         public static implicit operator long( ObjectID p )  { return p._l; }
+3. use this struct and set it to a decimal variable.
+      ObjectID vID = 45;
+      decimal vDec = 34;
+      vDec = vID;  //  <--- error here during compilation.
+
+
+==== Actual Results:
+compile this with mcs, and it will give an error like:
+TestFrm.cs(371) error CS0029: Cannot convert implicitly from 'ObjectID' to
+`decimal'
+
+
+==== Expected Results:
+With csc this compiles without a problem.
+
+==== How often does this happen? 
+All the time, during compilation
+
+==== Additional Information:
+
+I can do a work-around, by typecasting it to a long, ie.
+  vDec = (long) vID;
+
+This compiles OK.
+
+I havent tried for other datatypes... 
+e.g. int -> decimal, double -> decimal, etc.
+
+Regards,
+
+Yoon Kit.