"""Fixer for __nonzero__ -> __bool__ methods."""

# Author: Collin Winter

# Local imports

from .. import fixer_base

from ..fixer_util import Name, syms

class FixNonzero(fixer_base.BaseFix):

    PATTERN = """

    classdef< 'class' any+ ':'

              suite< any*

                     funcdef< 'def' name='__nonzero__'

                              parameters< '(' NAME ')' > any+ >

                     any* > >

    """

    def transform(self, node, results):

        name = results["name"]

        new = Name("__bool__", prefix=name.get_prefix())

        name.replace(new)