Add eval method to DtypeExpr
Add eval method to DtypeExpr

keisuke-umezawa/chainer,cupy/cupy,truongdq/chainer,ronekko/chainer,truongdq/chainer,benob/chainer,okuta/chainer,chainer/chainer,cupy/cupy,tigerneil/chainer,wkentaro/chainer,okuta/chainer,keisuke-umezawa/chainer,cupy/cupy,niboshi/chainer,AlpacaDB/chainer,okuta/chainer,ktnyt/chainer,wkentaro/chainer,niboshi/chainer,ikasumi/chainer,sinhrks/chainer,jnishi/chainer,hvy/chainer,cupy/cupy,kuwa32/chainer,sinhrks/chainer,kikusu/chainer,benob/chainer,rezoo/chainer,woodshop/chainer,yanweifu/chainer,pfnet/chainer,elviswf/chainer,ytoyama/yans_chainer_hackathon,wavelets/chainer,minhpqn/chainer,hvy/chainer,ktnyt/chainer,kashif/chainer,aonotas/chainer,anaruse/chainer,laysakura/chainer,ktnyt/chainer,bayerj/chainer,hvy/chainer,delta2323/chainer,chainer/chainer,niboshi/chainer,kiyukuta/chainer,okuta/chainer,tscohen/chainer,tereka114/chainer,hidenori-t/chainer,muupan/chainer,ktnyt/chainer,woodshop/complex-chainer,t-abe/chainer,keisuke-umezawa/chainer,tkerola/chainer,t-abe/chainer,AlpacaDB/chainer,jnishi/chainer,Kaisuke5/chainer,masia02/chainer,jnishi/chainer,chainer/chainer,chainer/chainer,wkentaro/chainer,umitanuki/chainer,jnishi/chainer,sou81821/chainer,jfsantos/chainer,cemoody/chainer,muupan/chainer,1986ks/chainer,keisuke-umezawa/chainer,ysekky/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,kikusu/chainer