class_docstr: Cast function.
class_docstr_tok: ["Cast","function","."]
code: def forward(self, x):
      self._in_type = x[0].dtype.type
      return (x[0].astype(self.type, copy=False),)
  
file_path: chainer/chainer/functions/array/cast.py
imports: import numpy
  import chainer
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 3 for calling the Cast obj's underlying member method code with example usage: obj.forward(x) and returns: x