1 #!/usr/bin/env python 2 3 """ 4 Operator support. 5 6 Copyright (C) 2010, 2013, 2015, 2016 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 binary_op, is_, is_not 23 24 # These functions defer method lookup by wrapping the attribute access in 25 # lambda functions. Thus, the appropriate methods are defined locally, but no 26 # attempt to obtain them is made until the generic function is called. 27 28 # NOTE: The compiler should make it possible for the following functions to call 29 # NOTE: the generic operator implementations with no additional call overhead. 30 31 # Binary operator functions. 32 33 def add(a, b): 34 return binary_op(a, b, lambda a: a.__add__, lambda b: b.__radd__) 35 36 def and_(a, b): 37 return binary_op(a, b, lambda a: a.__and__, lambda b: b.__rand__) 38 39 def contains(a, b): 40 return in_(b, a) 41 42 def div(a, b): 43 return binary_op(a, b, lambda a: a.__div__, lambda b: b.__rdiv__) 44 45 def floordiv(a, b): 46 return binary_op(a, b, lambda a: a.__floordiv__, lambda b: b.__rfloordiv__) 47 48 def in_(a, b): 49 return a.__contains__(b) 50 51 def not_in(a, b): 52 return not a.__contains__(b) 53 54 def lshift(a, b): 55 return binary_op(a, b, lambda a: a.__lshift__, lambda b: b.__rlshift__) 56 57 def mod(a, b): 58 return binary_op(a, b, lambda a: a.__mod__, lambda b: b.__rmod__) 59 60 def mul(a, b): 61 return binary_op(a, b, lambda a: a.__mul__, lambda b: b.__rmul__) 62 63 def or_(a, b): 64 return binary_op(a, b, lambda a: a.__or__, lambda b: b.__ror__) 65 66 def pow(a, b): 67 return binary_op(a, b, lambda a: a.__pow__, lambda b: b.__rpow__) 68 69 def rshift(a, b): 70 return binary_op(a, b, lambda a: a.__rshift__, lambda b: b.__rrshift__) 71 72 def sub(a, b): 73 return binary_op(a, b, lambda a: a.__sub__, lambda b: b.__rsub__) 74 75 def xor(a, b): 76 return binary_op(a, b, lambda a: a.__xor__, lambda b: b.__rxor__) 77 78 # vim: tabstop=4 expandtab shiftwidth=4
