AstNode: add Invoke() methods to AstType (builds InvocationExpression for static methods)

NRefactory/ICSharpCode.NRefactory/CSharp/Ast/AstType.cs

@@ -53,6 +53,30 @@ namespace ICSharpCode.NRefactory.CSharp
 			return new TypeReferenceExpression { Type = this }.Member(memberName);
 		}
 		
+		/// <summary>
+		/// Builds an invocation expression using this type as target.
+		/// </summary>
+		public InvocationExpression Invoke(string methodName, IEnumerable<Expression> arguments)
+		{
+			return new TypeReferenceExpression { Type = this }.Invoke(methodName, arguments);
+		}
+		
+		/// <summary>
+		/// Builds an invocation expression using this type as target.
+		/// </summary>
+		public InvocationExpression Invoke(string methodName, params Expression[] arguments)
+		{
+			return new TypeReferenceExpression { Type = this }.Invoke(methodName, arguments);
+		}
+		
+		/// <summary>
+		/// Builds an invocation expression using this type as target.
+		/// </summary>
+		public InvocationExpression Invoke(string methodName, IEnumerable<AstType> typeArguments, IEnumerable<Expression> arguments)
+		{
+			return new TypeReferenceExpression { Type = this }.Invoke(methodName, typeArguments, arguments);
+		}
+		
 		public static AstType Create(Type type)
 		{
 			switch (Type.GetTypeCode(type)) {

NRefactory/ICSharpCode.NRefactory/CSharp/Ast/PatternMatching/Pattern.cs

@@ -34,6 +34,11 @@ namespace ICSharpCode.NRefactory.CSharp.PatternMatching
 			return p != null ? new TypePlaceholder(p) : null;
 		}
 		
+		public AstType ToType()
+		{
+			return new TypePlaceholder(this);
+		}
+		
 		public static implicit operator Expression(Pattern p)
 		{
 			return p != null ? new ExpressionPlaceholder(p) : null;