[Mono-bugs] [Bug 68955][Nor] New - delegate with params array not handled correctly

bugzilla-daemon@bugzilla.ximian.com bugzilla-daemon@bugzilla.ximian.com
Sat, 30 Oct 2004 17:00:49 -0400 (EDT)

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Changed by vgough@pobox.com.


--- shadow/68955	2004-10-30 17:00:49.000000000 -0400
+++ shadow/68955.tmp.21093	2004-10-30 17:00:49.000000000 -0400
@@ -0,0 +1,51 @@
+Bug#: 68955
+Product: Mono: Compilers
+Version: unspecified
+OS Details: Suse 9.1
+Status: NEW   
+Priority: Normal
+Component: C#
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: vgough@pobox.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+Summary: delegate with params array not handled correctly
+Please fill in this template when reporting a bug, unless you know what 
+you are doing. 
+Description of Problem: 
+If you define a delegate with variable number of parameters: 
+   delete void Foo( string format, params object[] args ); 
+Then if you try and call it with no additional arguments, the compiler 
+   void Handler( string format, params object[] args ) {} 
+   Foo foo = new Foo( Handler ); 
+   foo( "hello world" ); 
+error CS1593: Delegate 'Foo' does not take '1' arguments 
+If you try and call it with multiple arguments it also fails: 
+   int i = 10; 
+   foo( "i = %i", i ); 
+error CS1594: Delegate 'Foo' has some invalid arguments. 
+error CS1503: Argument 1: Cannot convert from 'int' to 'object[]' 
+I was following examples of C# found on the net (one of which dates back 
+to 2002), which lead me to believe this is supposed to work. 
+Steps to reproduce the problem: 
+1. define delegate taking multiple parameters (using 'params' keyword) 
+2. attempt to call delegate using any number of parameters.. 
+3. see mcs barf