[utilities.general]

This Clause describes utilities that are generally useful in C++ programs; some of these utilities are used by other elements of the C++ standard library.

These utilities are summarized in Table 34 .

Table 34 — General utilities library summary

Subclause		Header(s)
[utility]	Utility components	<utility>
[intseq]	Compile-time integer sequences	<utility>
[pairs]	Pairs	<utility>
[tuple]	Tuples	<tuple>
[optional]	Optional objects	<optional>
[variant]	Variants	<variant>
[any]	Storage for any type	<any>
[bitset]	Fixed-size sequences of bits	<bitset>
[memory]	Memory	<memory>
		<cstdlib>
[smartptr]	Smart pointers	<memory>
[mem.res]	Memory resources	<memory_resource>
[allocator.adaptor]	Scoped allocators	<scoped_allocator>
[function.objects]	Function objects	<functional>
[meta]	Type traits	<type_traits>
[ratio]	Compile-time rational arithmetic	<ratio>
[time]	Time utilities	<chrono>
		<ctime>
[type.index]	Type indexes	<typeindex>
[execpol]	Execution policies	<execution>

23 General utilities library [utilities]

23.1 General [utilities.general]