71 lines
3.3 KiB

#include "storm/storage/expressions/CheckIfThenElseGuardVisitor.h"
#include "storm/storage/expressions/Expressions.h"
namespace storm {
namespace expressions {
CheckIfThenElseGuardVisitor::CheckIfThenElseGuardVisitor(std::set<storm::expressions::Variable> const& variables) : variables(variables) {
// Intentionally left empty.
}
bool CheckIfThenElseGuardVisitor::check(storm::expressions::Expression const& expression) {
return boost::any_cast<bool>(expression.accept(*this, boost::none));
}
boost::any CheckIfThenElseGuardVisitor::visit(IfThenElseExpression const& expression, boost::any const& data) {
// check whether the 'if' condition depends on one of the variables
if (expression.getCondition()->toExpression().containsVariable(variables)) {
return true;
} else {
// recurse
return
boost::any_cast<bool>(expression.getThenExpression()->accept(*this, data)) ||
boost::any_cast<bool>(expression.getElseExpression()->accept(*this, data));
}
}
boost::any CheckIfThenElseGuardVisitor::visit(BinaryBooleanFunctionExpression const& expression, boost::any const& data) {
return
boost::any_cast<bool>(expression.getFirstOperand()->accept(*this, data)) ||
boost::any_cast<bool>(expression.getSecondOperand()->accept(*this, data));
}
boost::any CheckIfThenElseGuardVisitor::visit(BinaryNumericalFunctionExpression const& expression, boost::any const& data) {
return
boost::any_cast<bool>(expression.getFirstOperand()->accept(*this, data)) ||
boost::any_cast<bool>(expression.getSecondOperand()->accept(*this, data));
}
boost::any CheckIfThenElseGuardVisitor::visit(BinaryRelationExpression const& expression, boost::any const& data) {
return
boost::any_cast<bool>(expression.getFirstOperand()->accept(*this, data)) ||
boost::any_cast<bool>(expression.getSecondOperand()->accept(*this, data));
}
boost::any CheckIfThenElseGuardVisitor::visit(VariableExpression const& expression, boost::any const&) {
return false;
}
boost::any CheckIfThenElseGuardVisitor::visit(UnaryBooleanFunctionExpression const& expression, boost::any const& data) {
return expression.getOperand()->accept(*this, data);
}
boost::any CheckIfThenElseGuardVisitor::visit(UnaryNumericalFunctionExpression const& expression, boost::any const& data) {
return expression.getOperand()->accept(*this, data);
}
boost::any CheckIfThenElseGuardVisitor::visit(BooleanLiteralExpression const& expression, boost::any const&) {
return false;
}
boost::any CheckIfThenElseGuardVisitor::visit(IntegerLiteralExpression const& expression, boost::any const&) {
return false;
}
boost::any CheckIfThenElseGuardVisitor::visit(RationalLiteralExpression const& expression, boost::any const&) {
return false;
}
}
}