Check if given for Node can use autoFor syntax.

        To use auto_for:
            - iterator should have local scope
            - yield should not be use
            - OpenMP pragma should not be use

        TODO : Yield should block only if it is use in the for loop, not in the
               whole function.

def can_use_autofor(self, node):
        """
        Check if given for Node can use autoFor syntax.

        To use auto_for:
            - iterator should have local scope
            - yield should not be use
            - OpenMP pragma should not be use

        TODO : Yield should block only if it is use in the for loop, not in the
               whole function.
        """
        auto_for = (isinstance(node.target, ast.Name) and
                    node.target.id in self.scope[node] and
                    node.target.id not in self.openmp_deps)
        auto_for &= not metadata.get(node, OMPDirective)
        auto_for &= node.target.id not in self.openmp_deps
        return auto_for