Functional

template <typename T> less

Function object for performing comparisons. Unless specialized, invokes operator< on type T.

constexpr bool operator()(T const &lhs, T const &rhs) const

Checks if lhs is less than rhs.

result_type = bool

first_argument_type = T

second_argument_type = T

template <typename T> less_equal

Function object for performing comparisons. Unless specialized, invokes operator<= on type T.

constexpr bool operator()(T const &lhs, T const &rhs) const

Checks if lhs is less or equal than rhs.

result_type = bool

first_argument_type = T

second_argument_type = T

template <typename T> greater

Function object for performing comparisons. Unless specialized, invokes operator> on type T.

constexpr bool operator()(T const &lhs, T const &rhs) const

Checks if lhs is greater than rhs.

result_type = bool

first_argument_type = T

second_argument_type = T

template <typename T> greater_equal

Function object for performing comparisons. Unless specialized, invokes operator>= on type T.

constexpr bool operator()(T const &lhs, T const &rhs) const

Checks if lhs is greater or equal than rhs.

result_type = bool

first_argument_type = T

second_argument_type = T

template <typename T, typename Compare = std::less<T>> less_than

Unary predicate that is constructed with a given pivot element and then returns true for elements that are less than the pivot, and false otherwise.

explicit less_than(T const &pivot, Compare compare = Compare())

Constructor. Saves a copy of the pivot in m_pivot and a copy of the compare object in m_compare.

bool operator()(T const &value) const

Returns the value of evaluating m_compare(value, m_pivot).

result_type = bool

argument_type = T

protected T m_pivot

protected Compare m_compare

template <typename T, typename Compare = std::greater<T>> greater_than

Unary predicate that is constructed with a given pivot element and then returns true for elements that are greater than the pivot, and false otherwise.

explicit greater_than(T const &pivot, Compare compare = Compare())

Constructor. Saves a copy of the pivot in m_pivot and a copy of the compare object in m_compare.

bool operator()(T const &value) const

Returns the value of evaluating m_compare(value, m_pivot).

result_type = bool

argument_type = T

protected T m_pivot

protected Compare m_compare

template <typename T> equal_to

Unary predicate that is constructed with a given pivot element and then returns true for elements that compare equal to the pivot.

explicit equal_to

Constructor. Saves a copy of the pivot in m_pivot.

template <typename U> bool operator()(U const& value) const

Returns the value of evaluating std::equal_to<T>(value, m_pivot). value is implicitly converted to type T.

result_type = bool

argument_type = T

protected T m_pivot