2017-03-24 Paul Boddie Added tests for integer operands, invoking integer-specific functions directly. This is similar to the special-casing that CPython does, and it speeds up certain programs enormously. integer-fast-paths
     1 #!/usr/bin/env python     2      3 """     4 Operator support.     5      6 Copyright (C) 2010, 2013, 2015, 2017 Paul Boddie <>     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 <>.    20 """    21     22 from operator.core import augassign    23 from native import int_add, int_div, int_mod, int_mul, int_pow, int_sub, \    24                    int_and, int_or, int_xor, \    25                    is_int    26     27 # These functions defer method lookup by wrapping the attribute access in    28 # lambda functions. Thus, the appropriate methods are defined locally, but no    29 # attempt to obtain them is made until the generic function is called.    30     31 # NOTE: The compiler should make it possible for the following functions to call    32 # NOTE: the generic operator implementations with no additional call overhead.    33     34 # Augmented assignment functions.    35     36 def iadd(a, b):    37     if is_int(a) and is_int(b):    38         return int_add(a, b)    39     return augassign(a, b, lambda a: a.__iadd__, lambda a: a.__add__, lambda b: b.__radd__)    40     41 def iand_(a, b):    42     if is_int(a) and is_int(b):    43         return int_and(a, b)    44     return augassign(a, b, lambda a: a.__iand__, lambda a: a.__and__, lambda b: b.__rand__)    45     46 def idiv(a, b):    47     if is_int(a) and is_int(b):    48         return int_div(a, b)    49     return augassign(a, b, lambda a: a.__idiv__, lambda a: a.__div__, lambda b: b.__rdiv__)    50     51 def ifloordiv(a, b):    52     return augassign(a, b, lambda a: a.__ifloordiv__, lambda a: a.__floordiv__, lambda b: b.__rfloordiv__)    53     54 def ilshift(a, b):    55     return augassign(a, b, lambda a: a.__ilshift__, lambda a: a.__lshift__, lambda b: b.__rlshift__)    56     57 def imod(a, b):    58     if is_int(a) and is_int(b):    59         return int_mod(a, b)    60     return augassign(a, b, lambda a: a.__imod__, lambda a: a.__mod__, lambda b: b.__rmod__)    61     62 def imul(a, b):    63     if is_int(a) and is_int(b):    64         return int_mul(a, b)    65     return augassign(a, b, lambda a: a.__imul__, lambda a: a.__mul__, lambda b: b.__rmul__)    66     67 def ior_(a, b):    68     if is_int(a) and is_int(b):    69         return int_or(a, b)    70     return augassign(a, b, lambda a: a.__ior__, lambda a: a.__or__, lambda b: b.__ror__)    71     72 def ipow(a, b):    73     if is_int(a) and is_int(b):    74         return int_pow(a, b)    75     return augassign(a, b, lambda a: a.__ipow__, lambda a: a.__pow__, lambda b: b.__rpow__)    76     77 def irshift(a, b):    78     return augassign(a, b, lambda a: a.__irshift__, lambda a: a.__rshift__, lambda b: b.__rrshift__)    79     80 def isub(a, b):    81     if is_int(a) and is_int(b):    82         return int_sub(a, b)    83     return augassign(a, b, lambda a: a.__isub__, lambda a: a.__sub__, lambda b: b.__rsub__)    84     85 def ixor(a, b):    86     if is_int(a) and is_int(b):    87         return int_xor(a, b)    88     return augassign(a, b, lambda a: a.__ixor__, lambda a: a.__xor__, lambda b: b.__rxor__)    89     90 # vim: tabstop=4 expandtab shiftwidth=4