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151 lines
3.3 KiB
151 lines
3.3 KiB
/*
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* BoundedUntil.h
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*
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* Created on: 27.11.2012
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* Author: Christian Dehnert
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*/
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#ifndef STORM_FORMULA_BOUNDEDEVENTUALLY_H_
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#define STORM_FORMULA_BOUNDEDEVENTUALLY_H_
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#include "PctlPathFormula.h"
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#include "PctlStateFormula.h"
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#include "boost/integer/integer_mask.hpp"
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#include <string>
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namespace storm {
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namespace formula {
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/*!
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* @brief
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* Class for a PCTL (path) formula tree with a BoundedEventually node as root.
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*
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* Has one PCTL state formulas as sub formula/tree.
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*
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* @par Semantics
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* The formula holds iff in at most \e bound steps, formula \e child holds.
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*
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* The subtrees are seen as part of the object and deleted with the object
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* (this behavior can be prevented by setting them to NULL before deletion)
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*
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* @see PctlPathFormula
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* @see PctlFormula
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*/
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template <class T>
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class BoundedEventually : public PctlPathFormula<T> {
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public:
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/*!
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* Empty constructor
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*/
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BoundedEventually() {
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this->child = nullptr;
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bound = 0;
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}
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/*!
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* Constructor
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*
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* @param child The child formula subtree
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* @param bound The maximal number of steps
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*/
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BoundedEventually(PctlStateFormula<T>* child, uint_fast64_t bound) {
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this->child = child;
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this->bound = bound;
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}
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/*!
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* Destructor.
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*
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* Also deletes the subtrees.
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* (this behaviour can be prevented by setting the subtrees to NULL before deletion)
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*/
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virtual ~BoundedEventually() {
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if (child != nullptr) {
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delete child;
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}
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}
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/*!
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* @returns the child node
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*/
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const PctlStateFormula<T>& getChild() const {
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return *child;
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}
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/*!
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* Sets the subtree
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* @param child the new child node
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*/
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void setChild(PctlStateFormula<T>* child) {
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this->child = child;
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}
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/*!
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* @returns the maximally allowed number of steps for the bounded until operator
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*/
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uint_fast64_t getBound() const {
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return bound;
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}
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/*!
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* Sets the maximally allowed number of steps for the bounded until operator
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*
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* @param bound the new bound.
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*/
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void setBound(uint_fast64_t bound) {
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this->bound = bound;
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}
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/*!
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* @returns a string representation of the formula
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*/
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virtual std::string toString() const {
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std::string result = "F<=";
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result += std::to_string(bound);
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result += " ";
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result += child->toString();
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return result;
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}
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/*!
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* Clones the called object.
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*
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* Performs a "deep copy", i.e. the subtrees of the new object are clones of the original ones
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*
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* @returns a new BoundedUntil-object that is identical the called object.
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*/
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virtual PctlPathFormula<T>* clone() const {
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BoundedEventually<T>* result = new BoundedEventually<T>();
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result->setBound(bound);
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if (child != nullptr) {
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result->setChild(child->clone());
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}
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return result;
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}
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/*!
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* Calls the model checker to check this formula.
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* Needed to infer the correct type of formula class.
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*
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* @note This function should only be called in a generic check function of a model checker class. For other uses,
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* the methods of the model checker should be used.
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*
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* @returns A vector indicating the probability that the formula holds for each state.
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*/
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virtual std::vector<T> *check(const storm::modelChecker::DtmcPrctlModelChecker<T>& modelChecker) const {
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return modelChecker.checkBoundedEventually(*this);
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}
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private:
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PctlStateFormula<T>* child;
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uint_fast64_t bound;
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};
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} //namespace formula
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} //namespace storm
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#endif /* STORM_FORMULA_BOUNDEDUNTIL_H_ */
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