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 function: 49 50 """ 51 The class of all function objects. 52 Note that as a special case, function does not inherit from object. 53 """ 54 55 def __init__(self): 56 57 """ 58 Reserve special attributes for function instances. 59 """ 60 61 self.__fn__ = None 62 self.__args__ = None 63 self.__fname__ = None 64 65 def __bool__(self): 66 67 "Functions are true by default." 68 69 return True 70 71 def __str__(self): 72 73 "Return a string representation." 74 75 return self.__fname__ 76 77 __repr__ = __str__ 78 79 class type(object): 80 81 "The class of all classes." 82 83 # __str__ and __repr__ are handled by str and repr for classes. 84 85 pass 86 87 class BaseException: 88 89 "The root of all exception types." 90 91 pass 92 93 class Exception(BaseException): pass 94 class MemoryError(Exception): pass 95 class TypeError(Exception): pass 96 class UnboundMethodInvocation(Exception): pass 97 class Warning(object): pass 98 99 def get_using(callable, instance): 100 101 "Return 'callable' bound to 'instance'." 102 103 return _get_using(callable, instance) 104 105 # vim: tabstop=4 expandtab shiftwidth=4