C++17 Backports

Backports from C++17.

A listing of some of the features backported:

• From the language proper: std::byte (see also to_byte() ) .
• From <algorithm>: clamp() .
• From <cstddef>: to_integral() .
• From <functional> : not_fn() , invoke() (down to C++11 only).
• From <iterator>: container data globals data() , size() , empty() .
• From <numeric> : gcd() , lcm() .
• From <tuple>: make_from_tuple() , apply() .
• From <type_traits>: make_void , void_t , bool_constant , etc.
• From <utility>: as_const(), in_place_type , in_place_index etc.

See also: C++14 Backports C++20 Backports .

Class bool_constant< B >

Implementation of bool_constant (bool specialization of integral_constant ).

Class byte

Standard declaration of a raw data, non-integral byte type.

Member cxxomfort::cxxostd::apply (F f, Tuple &t)

Invokes a callable f using the elements of the tuple t as arguments.

Member cxxomfort::cxxostd::as_ptr_const (T *const t) noexcept

"Type Utilities" as_const

Member cxxomfort::cxxostd::clamp (T const &val, T const &lo, T const &hi, Compare comp)

Clamps a value val within a range

Member cxxomfort::cxxostd::count (It ini, It fin, T const &tv)

Count the number of elements matching a given value

Member cxxomfort::cxxostd::count_if (It ini, It fin, Pred p)

Count the number of elements matching a predicate

Member cxxomfort::cxxostd::data (C &container) -> decltype(container.data())

Invoked c.data() or a similar construct for contiguous-storage sequences.

Member cxxomfort::cxxostd::data (C const &container)

"Iterators" empty

Member cxxomfort::cxxostd::for_each_n (II first, Size n, UnaryFunction f)

Invoke a function over the elements of a sequence.

Member cxxomfort::cxxostd::gcd (Num1 n1, Num2 n2) CXXO_NOEXCEPT

"Numeric" gcd

Member cxxomfort::cxxostd::invoke (F &&callable, Args &&... args)

Invokes callables via callable( args... ), accounting for eg.: member-pointer callables.

Member cxxomfort::cxxostd::lcm (Num1 n1, Num2 n2) CXXO_NOEXCEPT

"Numeric" lcm

Member cxxomfort::cxxostd::make_from_tuple (std::tuple< TupleArgs... > &&Tuple)

Constructs an object of type T using the tuple's elements for the constructor.

Member cxxomfort::cxxostd::not_fn (Fn &&f)

not_fn() from Fundamentals v2: a generic functor negator.

Member cxxomfort::cxxostd::size (C &c)

Invokes c.size() or an equivalent construct for a sequence.

Member cxxomfort::cxxostd::timespec_get (struct timespec *ts, int base)

Fetches timespec information from the system clock.

Member cxxomfort::cxxostd::to_integer (byte b)

Converts a byte to an integral value.

Class make_void< Arglist >

Constructs void from an instantiation.

Class timespec

timespec, from POSIX.

Class void_t

void type