Use std::conditional_t
Use std::conditional_t

hvy/chainer,hvy/chainer,chainer/chainer,chainer/chainer,ktnyt/chainer,okuta/chainer,wkentaro/chainer,pfnet/chainer,niboshi/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,chainer/chainer,keisuke-umezawa/chainer,hvy/chainer,okuta/chainer,jnishi/chainer,ktnyt/chainer,wkentaro/chainer,tkerola/chainer,niboshi/chainer,keisuke-umezawa/chainer,ktnyt/chainer,chainer/chainer,okuta/chainer,wkentaro/chainer,jnishi/chainer,keisuke-umezawa/chainer,hvy/chainer,niboshi/chainer,keisuke-umezawa/chainer,wkentaro/chainer,jnishi/chainer,niboshi/chainer