def _create_operation_expression(self, op, args):
""" Create a model operation
Args:
op: Operation descriptor
args: Operation arguments
Returns:
Model expression
Raises:
Cpo exception if error
"""
# Check interval operator
if op is _OPER_INTERVAL:
return tuple(args)
# Check unary minus on constant value
if (op is Oper_minus) and (len(args) == 1) and is_number(args[0]):
return -args[0]
if (op is Oper_plus) and (len(args) == 1) and is_number(args[0]):
return args[0]
try:
return _create_operation(op, args)
except Exception as e:
lastex = Exception("No valid operation found for {}: {}".format(op.cpo_name, e))
self._raise_exception(str(lastex))
def _create_operation_expression(self, op, args):
""" Create a model operation
Args:
op: Operation descriptor
args: Operation arguments
Returns:
Model expression
Raises:
Cpo exception if error
"""
# # Check unary minus on constant value
# if (op is Oper_minus) and (len(args) == 1) and is_number(args[0]):
# return -args[0]
# if (op is Oper_plus) and (len(args) == 1) and is_number(args[0]):
# return args[0]
# Check special operators
if op is Oper_imply:
return modeler.if_then(args[0], args[1])
if op is Oper_imply_back:
return modeler.if_then(args[1], args[0])
if op is Oper_equiv:
return modeler.equal(args[0], args[1])
try:
return _create_operation(op, args)
except Exception as e:
lastex = Exception("No valid operation found for {}: {}".format(
op.cpo_name, e))
self._raise_exception(str(lastex))