2007-07-23 Miguel de Icaza <miguel@novell.com>

	* expression.cs (Binary): Add support for the brain-dead CSC 2.x
	feature that allows structs to be compared against null and inline
	the result as true or false.

	Notice that the same code is not permitted inside a generic block
	of code that would do:

	class Foo<T> where T : struct {
	    bool Eval (T x)
	    {
	         return x == null;
	    }
	}

	It is only allowed if the type of T is not bound (no where
	clause).   In my opinion, this CSC 2 behavior is broken but people
	seem to be using it (IronRuby does, a few bug reports on bugzilla
	have it and some people have complained about it).

	All of the users that depend on this behavior have code that is
	very likely broken. 
	
	* report.cs (Warning, Error): make these take object arguments,
	not strings, as that allows us to take advantage of Format.



svn path=/trunk/mcs/; revision=82517

1 files changed, 24 insertions, 0 deletions

diff --git a/mcs/tests/test-577.cs b/mcs/tests/test-577.cs
new file mode 100644
index 00000000000..2060c6056bd
--- /dev/null
+++ b/mcs/tests/test-577.cs
@@ -0,0 +1,24 @@
+using System;
+
+public class X {
+	public static bool Compute (int x)
+	{
+		return x == null;
+	}
+
+	public static bool Compute2 (int x)
+	{
+		return x != null;
+	}
+	
+	static int Main ()
+	{
+		if (Compute (1) != false)
+			return 1;
+
+		if (Compute2 (1) != true)
+			return 1;
+
+		return 0;
+	}
+}