Source code for lib.CallBy

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# ==============================================================================
# Authors:            Patrick Lehmann
#
# Auxillary Classes:  Auxillary classes to implement call by reference.
#
# License:
# ==============================================================================
# Copyright 2017-2018 Patrick Lehmann - Bötzingen, Germany
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
#
# load dependencies


__api__ = [
	'CallByRefParam',
	'CallByRefBoolParam',
	'CallByRefIntParam'
]
__all__ = __api__

[docs]class CallByRefParam: """Implements a "call by reference" parameter. .. seealso:: :py:class:`CallByRefBoolParam` A special "call by reference" implementation for boolean reference types. :py:class:`CallByRefIntParam` A special "call by reference" implementation for integer reference types. """ def __init__(self, value=None): self.value = value def __ilshift__(self, other): self.value = other return self def __eq__(self, other): return self.value == other def __ne__(self, other): return self.value != other def __repr__(self): return repr(self.value) def __str__(self): return str(self.value)
[docs]class CallByRefBoolParam(CallByRefParam): """A special "call by reference" implementation for boolean reference types.""" # unary operators def __neg__(self): return not self.value # binary operators - logical def __and__(self, other): return self.value and other def __or__(self, other): return self.value or other # binary inplace operators def __iand__(self, other): self.value = self.value and other return self def __ior__(self, other): self.value = self.value or other return self # type conversion operators def __bool__(self): return self.value def __int__(self): return int(self.value)
[docs]class CallByRefIntParam(CallByRefParam): """A special "call by reference" implementation for integer reference types.""" # unary operators def __neg__(self): return not self.value # binary operators - arithmetic def __add__(self, other): return self.value + other def __sub__(self, other): return self.value - other def __truediv__(self, other): return self.value / other def __mul__(self, other): return self.value * other def __mod__(self, other): return self.value % other def __pow__(self, other): return self.value ** other # binary operators - comparison def __eq__(self, other): return self.value == other def __ne__(self, other): return self.value != other def __lt__(self, other): return self.value < other def __le__(self, other): return self.value <= other def __gt__(self, other): return self.value > other def __ge__(self, other): return self.value >= other # type conversion operators def __bool__(self): return bool(self.value) def __int__(self): return self.value