1.1 --- a/lib/__builtins__/core.py	Thu Jan 12 23:29:39 2017 +0100
     1.2 +++ b/lib/__builtins__/core.py	Thu Jan 12 23:50:26 2017 +0100
     1.3 @@ -3,7 +3,7 @@
     1.4  """
     1.5  Core objects.
     1.6  
     1.7 -Copyright (C) 2015, 2016 Paul Boddie <paul@boddie.org.uk>
     1.8 +Copyright (C) 2015, 2016, 2017 Paul Boddie <paul@boddie.org.uk>
     1.9  
    1.10  This program is free software; you can redistribute it and/or modify it under
    1.11  the terms of the GNU General Public License as published by the Free Software
    1.12 @@ -113,18 +113,57 @@
    1.13  
    1.14      __repr__ = __str__
    1.15  
    1.16 -class BaseException:
    1.17 +class Exception:
    1.18  
    1.19      "The root of all exception types."
    1.20  
    1.21      pass
    1.22  
    1.23 -class Exception(BaseException): pass
    1.24 -class MemoryError(Exception): pass
    1.25 -class OverflowError(Exception): pass
    1.26 -class TypeError(Exception): pass
    1.27 -class UnboundMethodInvocation(Exception): pass
    1.28 -class Warning: pass
    1.29 -class ZeroDivisionError(Exception): pass
    1.30 +# Fundamental exceptions 
    1.31 +
    1.32 +class MemoryError(Exception):
    1.33 +
    1.34 +    "An error indicating failure to allocate or manage memory."
    1.35 +
    1.36 +    pass
    1.37 +
    1.38 +class TypeError(Exception):
    1.39 +
    1.40 +    "An error indicating unsuitable type usage."
    1.41 +
    1.42 +    pass
    1.43 +
    1.44 +class UnboundMethodInvocation(Exception):
    1.45 +
    1.46 +    "An error indicating an attempt to call an unbound method."
    1.47 +
    1.48 +    pass
    1.49 +
    1.50 +class ArithmeticError(Exception):
    1.51 +
    1.52 +    "A general arithmetic operation error."
    1.53 +
    1.54 +    pass
    1.55 +
    1.56 +class FloatingPointError(Exception):
    1.57 +
    1.58 +    "A floating point operation error."
    1.59 +
    1.60 +    pass
    1.61 +
    1.62 +class OverflowError(ArithmeticError):
    1.63 +
    1.64 +    """
    1.65 +    Indicates that an arithmetic operation produced a result that could not be
    1.66 +    represented.
    1.67 +    """
    1.68 +
    1.69 +    pass
    1.70 +
    1.71 +class ZeroDivisionError(ArithmeticError):
    1.72 +
    1.73 +    "An error occurring when an attempt was made to divide an operand by zero."
    1.74 +
    1.75 +    pass
    1.76  
    1.77  # vim: tabstop=4 expandtab shiftwidth=4