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# Copyright 2008-2017 Free Software Foundation, Inc.
# This file is part of GNU Radio
#
# GNU Radio Companion is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# GNU Radio Companion is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
from __future__ import absolute_import
class TemplateArg(str):
"""
A cheetah template argument created from a param.
The str of this class evaluates to the param's to code method.
The use of this class as a dictionary (enum only) will reveal the enum opts.
The __call__ or () method can return the param evaluated to a raw python data type.
"""
def __new__(cls, param):
value = param.to_code()
instance = str.__new__(cls, value)
setattr(instance, '_param', param)
return instance
def __getitem__(self, item):
return str(self._param.get_opt(item)) if self._param.is_enum() else NotImplemented
def __getattr__(self, item):
if not self._param.is_enum():
raise AttributeError()
try:
return str(self._param.get_opt(item))
except KeyError:
raise AttributeError()
def __str__(self):
return str(self._param.to_code())
def __call__(self):
return self._param.get_evaluated()
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