# Licensed to the Apache Software Foundation (ASF) under one
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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
#
# 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.
# Created on Jul 28, 2019
#
# @author: ballance
from vsc.model.constraint_model import ConstraintModel
from vsc.model.constraint_scope_model import ConstraintScopeModel
from vsc.model.expr_model import ExprModel
[docs]class ConstraintIfElseModel(ConstraintModel):
def __init__(self,
cond : ExprModel,
true_c : ConstraintScopeModel = None,
false_c : ConstraintScopeModel = None):
super().__init__()
self.cond = cond
self.true_c : ConstraintModel = true_c
self.false_c : ConstraintModel = false_c
[docs] def build(self, btor, soft=False):
from vsc.visitors.model_pretty_printer import ModelPrettyPrinter
cond = ExprModel.toBool(btor, self.cond.build(btor))
true_c = self.true_c.build(btor, soft)
if self.false_c == None:
ret = btor.Implies(cond, true_c)
else:
false_c = self.false_c.build(btor, soft)
ret = btor.Cond(cond, true_c, false_c)
return ret
def __str__(self):
ret = "if (" + str(self.cond) + ") { " + str(self.true_c) + " }"
if self.false_c != None:
ret += " else { " + str(self.false_c) + " }"
return ret
[docs] def accept(self, visitor):
visitor.visit_constraint_if_else(self)
[docs] def clone(self, deep=False)->'ConstraintModel':
ret = ConstraintIfElseModel(self.cond)
if deep:
ret.true_c = self.true_c.clone()
ret.false_c = None if self.false_c is None else self.false_c.clone()
else:
ret.true_c = self.true_c
ret.false_c = None if self.false_c is None else self.false_c
return ret