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