/usr/lib/python2.7/dist-packages/ufl/restriction.py is in python-ufl 1.6.0-1.
This file is owned by root:root, with mode 0o644.
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# Copyright (C) 2008-2015 Martin Sandve Alnes
#
# This file is part of UFL.
#
# UFL is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# UFL 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with UFL. If not, see <http://www.gnu.org/licenses/>.
from ufl.log import error
from ufl.core.operator import Operator
from ufl.precedence import parstr
from ufl.core.ufl_type import ufl_type
#--- Restriction operators ---
@ufl_type(is_abstract=True,
num_ops=1,
inherit_shape_from_operand=0,
inherit_indices_from_operand=0,
is_restriction=True)
class Restricted(Operator):
__slots__ = ()
# TODO: Add __new__ operator here, e.g. restricted(literal) == literal
def __init__(self, f):
Operator.__init__(self, (f,))
def side(self):
return self._side
def evaluate(self, x, mapping, component, index_values):
return self.ufl_operands[0].evaluate(x, mapping, component, index_values)
def __str__(self):
return "%s('%s')" % (parstr(self.ufl_operands[0], self), self._side)
def __repr__(self):
return "%s(%r)" % (self._ufl_class_.__name__, self.ufl_operands[0])
@ufl_type(is_terminal_modifier=True)
class PositiveRestricted(Restricted):
__slots__ = ()
_side = "+"
@ufl_type(is_terminal_modifier=True)
class NegativeRestricted(Restricted):
__slots__ = ()
_side = "-"
# TODO: Place in a better file?
@ufl_type(is_index_free=True,
num_ops=1,
is_terminal_modifier=True,
is_evaluation=True)
class CellAvg(Operator):
__slots__ = ()
# TODO: Add __new__ operator here, e.g. cell_avg(literal) == literal
def __init__(self, f):
Operator.__init__(self, (f,))
@property
def ufl_shape(self):
return self.ufl_operands[0].ufl_shape
def evaluate(self, x, mapping, component, index_values):
"Performs an approximate symbolic evaluation, since we dont have a cell."
return self.ufl_operands[0].evaluate(x, mapping, component, index_values)
def __str__(self):
return "cell_avg(%s)" % (self.ufl_operands[0],)
def __repr__(self):
return "CellAvg(%r)" % self.ufl_operands[0]
# TODO: Place in a better file?
@ufl_type(is_index_free=True,
num_ops=1,
is_terminal_modifier=True,
is_evaluation=True)
class FacetAvg(Operator):
__slots__ = ()
# TODO: Add __new__ operator here, e.g. facet_avg(literal) == literal
def __init__(self, f):
Operator.__init__(self, (f,))
@property
def ufl_shape(self):
return self.ufl_operands[0].ufl_shape
def evaluate(self, x, mapping, component, index_values):
"Performs an approximate symbolic evaluation, since we dont have a cell."
return self.ufl_operands[0].evaluate(x, mapping, component, index_values)
def __str__(self):
return "facet_avg(%s)" % (self.ufl_operands[0],)
def __repr__(self):
return "FacetAvg(%r)" % self.ufl_operands[0]
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