Fixed SD2-1287: Method signatures are not compared correctly

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.1@2339 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Implementations/AbstractReturnType.cs

@@ -31,7 +31,7 @@ namespace ICSharpCode.SharpDevelop.Dom
 		{
 			IReturnType rt = o as IReturnType;
 			if (rt == null) return false;
-			return rt.IsDefaultReturnType && this.FullyQualifiedName == rt.FullyQualifiedName && this.TypeParameterCount == rt.TypeParameterCount;
+			return rt.IsDefaultReturnType && DefaultReturnType.Equals(this, rt);
 		}
 		
 		public override int GetHashCode()

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Implementations/DefaultReturnType.cs

@@ -17,6 +17,11 @@ namespace ICSharpCode.SharpDevelop.Dom
 	/// </summary>
 	public class DefaultReturnType : AbstractReturnType
 	{
+		public static bool Equals(IReturnType rt1, IReturnType rt2)
+		{
+			return rt1.FullyQualifiedName == rt2.FullyQualifiedName && rt1.TypeParameterCount == rt2.TypeParameterCount;
+		}
+		
 		IClass c;
 		
 		public DefaultReturnType(IClass c)

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Implementations/GetClassReturnType.cs

@@ -41,15 +41,11 @@ namespace ICSharpCode.SharpDevelop.Dom
 		
 		public override bool Equals(object o)
 		{
-			GetClassReturnType rt = o as GetClassReturnType;
-			if (rt == null) {
-				IReturnType rt2 = o as IReturnType;
-				if (rt2 != null && rt2.IsDefaultReturnType)
-					return rt2.FullyQualifiedName == fullName && rt2.TypeParameterCount == this.TypeParameterCount;
-				else
-					return false;
-			}
-			return fullName == rt.fullName && typeParameterCount == rt.typeParameterCount && content == rt.content;
+			IReturnType rt = o as IReturnType;
+			if (rt != null && rt.IsDefaultReturnType)
+				return DefaultReturnType.Equals(this, rt);
+			else
+				return false;
 		}
 		
 		public override int GetHashCode()

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/Implementations/SearchClassReturnType.cs

@@ -49,21 +49,9 @@ namespace ICSharpCode.SharpDevelop.Dom
 		
 		public override bool Equals(object o)
 		{
-			SearchClassReturnType rt = o as SearchClassReturnType;
-			if (rt != null) {
-				if (name != rt.name)
-					return false;
-				if (declaringClass.FullyQualifiedName == rt.declaringClass.FullyQualifiedName
-				    && typeParameterCount == rt.typeParameterCount
-				    && caretLine == rt.caretLine
-				    && caretColumn == rt.caretColumn)
-				{
-					return true;
-				}
-			}
 			IReturnType rt2 = o as IReturnType;
 			if (rt2 != null && rt2.IsDefaultReturnType)
-				return rt2.FullyQualifiedName == this.FullyQualifiedName && rt2.TypeParameterCount == this.TypeParameterCount;
+				return DefaultReturnType.Equals(this, rt2);
 			else
 				return false;
 		}