From 37d907f7c5670efb8f44a3fa2aabb7c04075e2ae Mon Sep 17 00:00:00 2001
From: jbevain <jbevain@gmail.com>
Date: Tue, 7 Sep 2010 17:20:59 +0200
Subject: Fix constant type coalescing

---
 Mono.Cecil/AssemblyWriter.cs | 58 +++++++++++++++++++++++++++++---------------
 1 file changed, 38 insertions(+), 20 deletions(-)

diff --git a/Mono.Cecil/AssemblyWriter.cs b/Mono.Cecil/AssemblyWriter.cs
index 8dbc117..3c64145 100644
--- a/Mono.Cecil/AssemblyWriter.cs
+++ b/Mono.Cecil/AssemblyWriter.cs
@@ -1646,6 +1646,21 @@ namespace Mono.Cecil {
 			case ElementType.ByRef:
 			case ElementType.Sentinel:
 				return GetConstantType (((TypeSpecification) constant_type).ElementType, constant);
+			case ElementType.Boolean:
+			case ElementType.Char:
+			case ElementType.I:
+			case ElementType.I1:
+			case ElementType.I2:
+			case ElementType.I4:
+			case ElementType.I8:
+			case ElementType.U:
+			case ElementType.U1:
+			case ElementType.U2:
+			case ElementType.U4:
+			case ElementType.U8:
+			case ElementType.R4:
+			case ElementType.R8:
+				return constant == null ? etype : GetConstantType (constant.GetType ());
 			default:
 				return etype;
 			}
@@ -1891,7 +1906,7 @@ namespace Mono.Cecil {
 				signature.WriteConstantString ((string) value);
 				break;
 			default:
-				signature.WriteConstantPrimitive (type, value);
+				signature.WriteConstantPrimitive (value);
 				break;
 			}
 
@@ -2200,9 +2215,9 @@ namespace Mono.Cecil {
 			WriteBytes (Encoding.Unicode.GetBytes (value));
 		}
 
-		public void WriteConstantPrimitive (ElementType type, object value)
+		public void WriteConstantPrimitive (object value)
 		{
-			WritePrimitiveValue (type, value);
+			WritePrimitiveValue (value);
 		}
 
 		public void WriteCustomAttributeConstructorArguments (CustomAttribute attribute)
@@ -2285,52 +2300,55 @@ namespace Mono.Cecil {
 					WriteCustomAttributeEnumValue (type, value);
 				break;
 			default:
-				WritePrimitiveValue (etype, value);
+				WritePrimitiveValue (value);
 				break;
 			}
 		}
 
-		void WritePrimitiveValue (ElementType type, object value)
+		void WritePrimitiveValue (object value)
 		{
-			switch (type) {
-			case ElementType.Boolean:
+			if (value == null)
+				throw new ArgumentNullException ();
+
+			switch (Type.GetTypeCode (value.GetType ())) {
+			case TypeCode.Boolean:
 				WriteByte ((byte) (((bool) value) ? 1 : 0));
 				break;
-			case ElementType.U1:
+			case TypeCode.Byte:
 				WriteByte ((byte) value);
 				break;
-			case ElementType.I1:
-				WriteByte ((byte) (sbyte) value);
+			case TypeCode.SByte:
+				WriteSByte ((sbyte) value);
 				break;
-			case ElementType.I2:
+			case TypeCode.Int16:
 				WriteInt16 ((short) value);
 				break;
-			case ElementType.U2:
+			case TypeCode.UInt16:
 				WriteUInt16 ((ushort) value);
 				break;
-			case ElementType.Char:
+			case TypeCode.Char:
 				WriteInt16 ((short) (char) value);
 				break;
-			case ElementType.I4:
+			case TypeCode.Int32:
 				WriteInt32 ((int) value);
 				break;
-			case ElementType.U4:
+			case TypeCode.UInt32:
 				WriteUInt32 ((uint) value);
 				break;
-			case ElementType.R4:
+			case TypeCode.Single:
 				WriteSingle ((float) value);
 				break;
-			case ElementType.I8:
+			case TypeCode.Int64:
 				WriteInt64 ((long) value);
 				break;
-			case ElementType.U8:
+			case TypeCode.UInt64:
 				WriteUInt64 ((ulong) value);
 				break;
-			case ElementType.R8:
+			case TypeCode.Double:
 				WriteDouble ((double) value);
 				break;
 			default:
-				throw new NotSupportedException (type.ToString ());
+				throw new NotSupportedException (value.GetType ().FullName);
 			}
 		}
 
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