def expand(self, e: ExprModel) -> ExprModel:
if ForeachRefExpander.EN_DEBUG > 0:
print("--> ForeachRefExpander::expand")
self._field = None
self._expr = None
# Tracks whether a foreach index is used anywhere in the expression
self._refs_index_var = False
e.accept(self)
if self._refs_index_var:
if self._expr is not None:
ret = self._expr
elif self._field is not None:
ret = ExprFieldRefModel(self._field)
else:
raise Exception(
"references index vars, but failed to resolve field")
else:
ret = None
if ForeachRefExpander.EN_DEBUG > 0:
print("<-- ForeachRefExpander::expand ret=%s" % str(ret))
return ret
def field(self, e: ExprModel, fail_on_failure=True):
e.accept(self)
if self.fm is None and fail_on_failure:
from vsc.visitors.model_pretty_printer import ModelPrettyPrinter
raise Exception("Failed to obtain field from expression %s" %
(ModelPrettyPrinter.print(e)))
return self.fm
def build(self, btor: Boolector):
ret = None
if self.op == UnaryExprType.Not:
ret = btor.Not(self.expr.build(btor))
return ret
ExprModel.build(self, btor)
def build(self, btor):
from vsc.visitors.model_pretty_printer import ModelPrettyPrinter
cond = ExprModel.toBool(btor, self.cond.build(btor))
true_c = self.true_c.build(btor)
if self.false_c == None:
ret = btor.Implies(cond, true_c)
else:
false_c = self.false_c.build(btor)
ret = btor.Cond(cond, true_c, false_c)
return ret
def build(self, btor):
return ExprModel.toBool(btor, self.e.build(btor))
def build(self, btor):
cond = ExprModel.toBool(btor, self.cond.build(btor))
body = super().build(btor)
return btor.Implies(cond, body)
def build(self, btor):
raise Exception("")
ExprModel.build(self, btor)
def val(self):
# TODO: return min or max value of the propagator
ExprModel.val(self)