From 08161f96ed9842910f4a35fe339d6c34605fac35 Mon Sep 17 00:00:00 2001
From: Yao Zhang <psyyz10@nottingham.ac.uk>
Date: Mon, 25 Sep 2017 15:22:15 +0800
Subject: [PATCH] Add Assign, Cast, ExpandDims, MaxPool operations (#1562)

* add assign

* Add Cast and ExpandDims

* meet code review

* meet code reiew

* meet code review

* meet code review

* meet code review

* add comment to NumericWildcard type

* try to fix an AbstractMethod error in Cast method

* fix test failure