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152 lines
3.0 KiB
152 lines
3.0 KiB
/*
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* Until.h
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*
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* Created on: 19.10.2012
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* Author: Thomas Heinemann
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*/
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#ifndef STORM_FORMULA_ABSTRACT_UNTIL_H_
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#define STORM_FORMULA_ABSTRACT_UNTIL_H_
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#include "src/formula/abstract/AbstractFormula.h"
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#include "src/formula/abstract/AbstractFormula.h"
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#include "src/formula/AbstractFormulaChecker.h"
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namespace storm {
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namespace formula {
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namespace abstract {
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/*!
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* @brief
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* Class for a Abstract (path) formula tree with an Until node as root.
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*
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* Has two Abstract state formulas as sub formulas/trees.
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*
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* @par Semantics
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* The formula holds iff eventually, formula \e right (the right subtree) holds, and before,
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* \e left holds always.
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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 AbstractFormula
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* @see AbstractFormula
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*/
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template <class T, class FormulaType>
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class Until : public AbstractFormula<T> {
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public:
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/*!
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* Empty constructor
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*/
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Until() {
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this->left = NULL;
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this->right = NULL;
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}
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/*!
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* Constructor
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*
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* @param left The left formula subtree
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* @param right The left formula subtree
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*/
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Until(FormulaType* left, FormulaType* right) {
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this->left = left;
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this->right = right;
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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 ~Until() {
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if (left != NULL) {
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delete left;
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}
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if (right != NULL) {
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delete right;
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}
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}
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/*!
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* Sets the left child node.
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*
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* @param newLeft the new left child.
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*/
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void setLeft(FormulaType* newLeft) {
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left = newLeft;
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}
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/*!
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* Sets the right child node.
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*
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* @param newRight the new right child.
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*/
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void setRight(FormulaType* newRight) {
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right = newRight;
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}
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/*!
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* @returns a pointer to the left child node
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*/
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const FormulaType& getLeft() const {
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return *left;
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}
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/*!
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* @returns a pointer to the right child node
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*/
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const FormulaType& getRight() const {
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return *right;
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}
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/*!
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*
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* @return True if the left child is set, i.e. it does not point to nullptr; false otherwise
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*/
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bool leftIsSet() const {
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return left != nullptr;
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}
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/*!
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*
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* @return True if the right child is set, i.e. it does not point to nullptr; false otherwise
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*/
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bool rightIsSet() const {
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return right != nullptr;
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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 = left->toString();
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result += " U ";
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result += right->toString();
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return result;
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}
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/*!
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* @brief Checks if all subtrees conform to some logic.
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*
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* @param checker Formula checker object.
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* @return true iff all subtrees conform to some logic.
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*/
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virtual bool conforms(const AbstractFormulaChecker<T>& checker) const {
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return checker.conforms(this->left) && checker.conforms(this->right);
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}
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private:
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FormulaType* left;
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FormulaType* right;
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};
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} //namespace abstract
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} //namespace formula
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} //namespace storm
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#endif /* STORM_FORMULA_ABSTRACT_UNTIL_H_ */
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