Source code for ufl.duals

# -*- coding: utf-8 -*-
"""Predicates for recognising duals"""

# Copyright (C) 2021 India Marsden
#
# This file is part of UFL (https://www.fenicsproject.org)
#
# SPDX-License-Identifier:    LGPL-3.0-or-later
#


[docs]def is_primal(object): """Determine if the object belongs to a primal space This is not simply the negation of :func:`is_dual`, because a mixed function space containing both primal and dual components is neither primal nor dual.""" return hasattr(object, '_primal') and object._primal
[docs]def is_dual(object): """Determine if the object belongs to a dual space This is not simply the negation of :func:`is_primal`, because a mixed function space containing both primal and dual components is neither primal nor dual.""" return hasattr(object, '_dual') and object._dual