/usr/lib/python3/dist-packages/ufl/referencevalue.py is in python3-ufl 2017.2.0.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | # -*- coding: utf-8 -*-
"Representation of the reference value of a function."
# Copyright (C) 2008-2016 Martin Sandve Alnæs
#
# 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.core.ufl_type import ufl_type
from ufl.core.operator import Operator
from ufl.core.terminal import FormArgument
from ufl.log import error
@ufl_type(num_ops=1,
is_index_free=True,
is_terminal_modifier=True,
is_in_reference_frame=True)
class ReferenceValue(Operator):
"Representation of the reference cell value of a form argument."
__slots__ = ()
def __init__(self, f):
if not isinstance(f, FormArgument):
error("Can only take reference value of form arguments.")
Operator.__init__(self, (f,))
@property
def ufl_shape(self):
return self.ufl_operands[0].ufl_element().reference_value_shape()
def evaluate(self, x, mapping, component, index_values, derivatives=()):
"Get child from mapping and return the component asked for."
error("Evaluate not implemented.")
def __str__(self):
return "reference_value(%s)" % self.ufl_operands[0]
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