C++ Library - <utility>

Introduction

It contains utilities in unrelated domains.

Pairs − these objects can hold two values of different types: pair, make_pair, piecewise_construct, piecewise_construct_t.
Generic relational operators − It is a standard definitions for the relational operators !=, >, <= and >= under a specific namespace: rel_ops.
Rvalue casts (C++11) − It allows the generation of rvalue references: forward, move, move_if_noexcept, declval.
Generic swap function − This a standard definition used by default by the components of the standard library for all types that do not provide their own overload: swap.

Sr.No.	Function & description
1	swap It exchanges values of two objects.
2	make_pair It constructs the pair objects.
3	forward It is a forward argument.
4	move It moves as rvalue.
5	move_if_noexcept It moves if noexcept.
6	declval It is a declaration value.

Sr.No.	Constant & description
1	piecewise_construct It is a piecewise construct constant.

Sr.No.	Namespace & description
1	rel_ops It is a relational Operators.