1 #!/usr/bin/env python 2 3 """ 4 Operator support. 5 6 Copyright (C) 2010, 2013, 2015, 2016, 2017 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from operator.core import unary_op 23 from native.int import int_neg, int_not, is_int 24 25 # These functions defer method lookup by wrapping the attribute access in 26 # lambda functions. Thus, the appropriate methods are defined locally, but no 27 # attempt to obtain them is made until the generic function is called. 28 29 # Unary operator functions. 30 31 def invert(a): 32 return unary_op(a, lambda a: a.__invert__) 33 34 def neg(a): 35 if is_int(a): 36 return int_neg(a) 37 return unary_op(a, lambda a: a.__neg__) 38 39 def not_(a): 40 if is_int(a): 41 return int_not(a) 42 return not a 43 44 def pos(a): 45 if is_int(a): 46 return a 47 return unary_op(a, lambda a: a.__pos__) 48 49 # vim: tabstop=4 expandtab shiftwidth=4
