Lichen

lib/operator/comparison.py

932:c07b0dd14f85
11 months ago Paul Boddie Moved integer instantiation support to library functions.
     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 binary_op    23 from native import int_eq, int_ge, int_gt, int_le, int_lt, int_ne, 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 # Comparison functions.    30     31 def eq(a, b):    32     if is_int(a) and is_int(b):    33         return int_eq(a, b)    34     return binary_op(a, b, lambda a: a.__eq__, lambda b: b.__eq__, False)    35     36 def ge(a, b):    37     if is_int(a) and is_int(b):    38         return int_ge(a, b)    39     return binary_op(a, b, lambda a: a.__ge__, lambda b: b.__le__)    40     41 def gt(a, b):    42     if is_int(a) and is_int(b):    43         return int_gt(a, b)    44     return binary_op(a, b, lambda a: a.__gt__, lambda b: b.__lt__)    45     46 def le(a, b):    47     if is_int(a) and is_int(b):    48         return int_le(a, b)    49     return binary_op(a, b, lambda a: a.__le__, lambda b: b.__ge__)    50     51 def lt(a, b):    52     if is_int(a) and is_int(b):    53         return int_lt(a, b)    54     return binary_op(a, b, lambda a: a.__lt__, lambda b: b.__gt__)    55     56 def ne(a, b):    57     if is_int(a) and is_int(b):    58         return int_ne(a, b)    59     return binary_op(a, b, lambda a: a.__ne__, lambda b: b.__ne__, True)    60     61 # vim: tabstop=4 expandtab shiftwidth=4