1 #!/usr/bin/env python 2 3 """ 4 Core objects. 5 6 Copyright (C) 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 native import _get_using 23 24 class object: 25 26 "The root class of all objects except functions." 27 28 def __init__(self): 29 30 "No-operation." 31 32 pass 33 34 def __bool__(self): 35 36 "Objects are true by default." 37 38 return True 39 40 def __str__(self): 41 42 "Return a string representation." 43 44 return str(buffer(["<", self.__name__, " instance>"])) 45 46 __repr__ = __str__ 47 48 class module: 49 50 "The class of module objects." 51 52 def __init__(self): 53 54 """ 55 Reserve special attributes for module instances. 56 """ 57 58 self.__file__ = None 59 self.__mname__ = None 60 61 def __str__(self): 62 63 "Return a string representation." 64 65 return self.__mname__ 66 67 __repr__ = __str__ 68 69 class function: 70 71 """ 72 The class of all function objects. 73 Note that as a special case, function does not inherit from object. 74 """ 75 76 def __init__(self): 77 78 """ 79 Reserve special attributes for function instances. 80 """ 81 82 self.__fn__ = None 83 self.__args__ = None 84 self.__fname__ = None 85 86 def __bool__(self): 87 88 "Functions are true by default." 89 90 return True 91 92 def __str__(self): 93 94 "Return a string representation." 95 96 return self.__fname__ 97 98 __repr__ = __str__ 99 100 class type(object): 101 102 "The class of all classes." 103 104 # __str__ and __repr__ are handled by str and repr for classes. 105 106 pass 107 108 class BaseException: 109 110 "The root of all exception types." 111 112 pass 113 114 class Exception(BaseException): pass 115 class MemoryError(Exception): pass 116 class TypeError(Exception): pass 117 class UnboundMethodInvocation(Exception): pass 118 class Warning(object): pass 119 120 def get_using(callable, instance): 121 122 "Return 'callable' bound to 'instance'." 123 124 return _get_using(callable, instance) 125 126 # vim: tabstop=4 expandtab shiftwidth=4