[Mono-bugs] [Bug 76133][Maj] New - Fixed statement error within unsafe code

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Changed by rastaman at ceejs.com.

http://bugzilla.ximian.com/show_bug.cgi?id=76133

--- shadow/76133	2005-09-17 03:13:30.000000000 -0400
+++ shadow/76133.tmp.1775	2005-09-17 03:13:30.000000000 -0400
@@ -0,0 +1,104 @@
+Bug#: 76133
+Product: Mono: Compilers
+Version: 1.1
+OS: 
+OS Details: Ubuntu 5.04
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Major
+Component: C#
+AssignedTo: rharinath at novell.com                            
+ReportedBy: rastaman at ceejs.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Fixed statement error within unsafe code
+
+Please fill in this template when reporting a bug, unless you know what you
+are doing.
+Description of Problem:
+
+
+Steps to reproduce the problem:
+compile this code with "mcs -unsafe test.fixed.cs" and i get this error:
+test.fixed.cs(24,22): error CS0213: You cannot use the fixed statement to
+take the address of an already fixed expression
+Compilation failed: 1 error(s), 0 warnings
+
+I compiled it with csc on windows "csc /unsafe test.fixed.cs" and no errors
+ it runs and outputs the correct output:
+ col(0) = ( 1.1, 2.1, 3.1 )
+ col(1) = ( 1.2, 2.2, 3.2 )
+ col(2) = ( 1.3, 2.3, 3.3 )
+
+
+
+-- file test.fixed.cs --
+using System;
+
+public struct Vector3
+{
+	public float x,y,z;
+	public Vector3(float _x, float _y, float _z)
+	{
+		x = _x;
+		y = _y;
+		z = _z;
+	}
+}
+
+public struct Matrix3
+{
+	public float m00, m01, m02;
+	public float m10, m11, m12;
+	public float m20, m21, m22;
+	
+	public Vector3 GetColumn(int col) 
+	{
+		unsafe 
+		{
+			fixed(float* pM = &m00)
+			{
+				return new Vector3(	*(pM + col),   //m[0,col], 
+					*(pM + 3 + col),   //m[1,col], 
+					*(pM + 6 + col));  //m[2,col]);
+			}
+		}
+	}
+
+	public static void Main ()
+	{
+		Matrix3 m = new Matrix3();
+		m.m00 = 1.1f;
+		m.m01 = 1.2f;
+		m.m02 = 1.3f;
+
+		m.m10 = 2.1f;
+		m.m11 = 2.2f;
+		m.m12 = 2.3f;
+
+		m.m20 = 3.1f;
+		m.m21 = 3.2f;
+		m.m22 = 3.3f;
+
+		for (int i=0; i<3; i++)
+		{
+			Vector3 v = m.GetColumn( i );
+			Console.WriteLine(" col({0}) = ( {1}, {2}, {3} ) " , i, v.x, v.y, v.z );
+		}
+	}
+}
+-- test.fixed.cs --
+
+Actual Results:
+
+
+Expected Results:
+
+
+How often does this happen? 
+
+
+Additional Information: