diff options
Diffstat (limited to 'src/dpl/core/include/cchecker/dpl/optional.h')
| -rw-r--r-- | src/dpl/core/include/cchecker/dpl/optional.h | 274 |
1 files changed, 138 insertions, 136 deletions
diff --git a/src/dpl/core/include/cchecker/dpl/optional.h b/src/dpl/core/include/cchecker/dpl/optional.h index 42d1bd4..0f19d86 100644 --- a/src/dpl/core/include/cchecker/dpl/optional.h +++ b/src/dpl/core/include/cchecker/dpl/optional.h @@ -26,135 +26,137 @@ namespace CCHECKER { template <typename Type> -class Optional -{ - class Exception - { - public: - DECLARE_EXCEPTION_TYPE(CCHECKER::Exception, Base) - DECLARE_EXCEPTION_TYPE(Base, NullReference) - }; - - public: - Optional() : - m_null(true), - m_value() - {} - - Optional(const Type& t) : - m_null(false), - m_value(t) - {} - - bool IsNull() const - { - return m_null; - } - - Type& operator*() - { - if (m_null) { - Throw(typename Exception::NullReference); - } - return m_value; - } - - const Type& operator*() const - { - if (m_null) { - Throw(typename Exception::NullReference); - } - return m_value; - } - - const Type* operator->() const - { - if (m_null) { - Throw(typename Exception::NullReference); - } - return &m_value; - } - - Type* operator->() - { - if (m_null) { - Throw(typename Exception::NullReference); - } - return &m_value; - } - - bool operator!() const - { - return m_null; - } - - Optional<Type>& operator=(const Type& other) - { - m_null = false; - m_value = other; - return *this; - } - - bool operator==(const Optional<Type>& aSecond) const - { - return LogicalOperator<true>(*this, aSecond, - std::equal_to<Type>(), std::equal_to<bool>()); - } - - bool operator==(const Type& aSecond) const - { - return Optional<Type>(aSecond) == *this; - } - - bool operator!=(const Optional<Type>& aSecond) const - { - return !(*this == aSecond); - } - - bool operator<(const Optional<Type>& aSecond) const - { - return LogicalOperator<false>(*this, aSecond, - std::less<Type>(), std::less<bool>()); - } - - bool operator>(const Optional<Type>& aSecond) const - { - return LogicalOperator<false>(*this, aSecond, - std::greater<Type>(), std::greater<bool>()); - } - - bool operator<=(const Optional<Type>& aSecond) const - { - return *this == aSecond || *this < aSecond; - } - - bool operator>=(const Optional<Type>& aSecond) const - { - return *this == aSecond || *this > aSecond; - } - - static Optional<Type> Null; - - private: - bool m_null; - Type m_value; - - template <bool taEquality, typename taComparator, typename taNullComparator> - static bool LogicalOperator(const Optional<Type>& aFirst, - const Optional<Type>& aSecond, - taComparator aComparator, - taNullComparator aNullComparator) - { - if (aFirst.m_null == aSecond.m_null) { - if (aFirst.m_null) { - return taEquality; - } else { - return aComparator(aFirst.m_value, aSecond.m_value); - } - } else { - return aNullComparator(aFirst.m_null, aSecond.m_null); - } - } +class Optional { + class Exception { + public: + DECLARE_EXCEPTION_TYPE(CCHECKER::Exception, Base) + DECLARE_EXCEPTION_TYPE(Base, NullReference) + }; + +public: + Optional() : + m_null(true), + m_value() + {} + + Optional(const Type &t) : + m_null(false), + m_value(t) + {} + + bool IsNull() const + { + return m_null; + } + + Type &operator*() + { + if (m_null) { + Throw(typename Exception::NullReference); + } + + return m_value; + } + + const Type &operator*() const + { + if (m_null) { + Throw(typename Exception::NullReference); + } + + return m_value; + } + + const Type *operator->() const + { + if (m_null) { + Throw(typename Exception::NullReference); + } + + return &m_value; + } + + Type *operator->() + { + if (m_null) { + Throw(typename Exception::NullReference); + } + + return &m_value; + } + + bool operator!() const + { + return m_null; + } + + Optional<Type> &operator=(const Type &other) + { + m_null = false; + m_value = other; + return *this; + } + + bool operator==(const Optional<Type> &aSecond) const + { + return LogicalOperator<true>(*this, aSecond, + std::equal_to<Type>(), std::equal_to<bool>()); + } + + bool operator==(const Type &aSecond) const + { + return Optional<Type>(aSecond) == *this; + } + + bool operator!=(const Optional<Type> &aSecond) const + { + return !(*this == aSecond); + } + + bool operator<(const Optional<Type> &aSecond) const + { + return LogicalOperator<false>(*this, aSecond, + std::less<Type>(), std::less<bool>()); + } + + bool operator>(const Optional<Type> &aSecond) const + { + return LogicalOperator<false>(*this, aSecond, + std::greater<Type>(), std::greater<bool>()); + } + + bool operator<=(const Optional<Type> &aSecond) const + { + return *this == aSecond || *this < aSecond; + } + + bool operator>=(const Optional<Type> &aSecond) const + { + return *this == aSecond || *this > aSecond; + } + + static Optional<Type> Null; + +private: + bool m_null; + Type m_value; + + template <bool taEquality, typename taComparator, typename taNullComparator> + static bool LogicalOperator(const Optional<Type> &aFirst, + const Optional<Type> &aSecond, + taComparator aComparator, + taNullComparator aNullComparator) + { + if (aFirst.m_null == aSecond.m_null) { + if (aFirst.m_null) { + return taEquality; + } else { + return aComparator(aFirst.m_value, aSecond.m_value); + } + } else { + return aNullComparator(aFirst.m_null, aSecond.m_null); + } + } }; template<typename Type> @@ -162,14 +164,14 @@ Optional<Type> Optional<Type>::Null = Optional<Type>(); } //namespace CCHECKER template<typename Type> -std::ostream& operator<<(std::ostream& aStream, - const CCHECKER::Optional<Type>& aOptional) +std::ostream &operator<<(std::ostream &aStream, + const CCHECKER::Optional<Type> &aOptional) { - if (aOptional.IsNull()) { - return aStream << "null optional"; - } else { - return aStream << *aOptional; - } + if (aOptional.IsNull()) { + return aStream << "null optional"; + } else { + return aStream << *aOptional; + } } #endif // CCHECKER_OPTIONAL_VALUE_H |