value::swap

`value::swap`

Swap the given values.

Synopsis

Defined in header <boost/json/value.hpp>.

void
swap(
    value& lhs,
    value& rhs);

Description

Exchanges the contents of value lhs with another value rhs. Ownership of the respective boost::container::pmr::memory_resource objects is not transferred.

If *lhs.storage() == *rhs.storage(), ownership of the underlying memory is swapped in constant time, with no possibility of exceptions. All iterators and references remain valid.
If *lhs.storage() != *rhs.storage, the contents are logically swapped by a copy, which can throw. In this case all iterators and references are invalidated.

Effects

lhs.swap( rhs );

Complexity

Constant or linear in the sum of the sizes of the values.

Exception Safety

Strong guarantee. Calls to memory_resource::allocate may throw.

Parameters

Name Description

Name	Description
`lhs`	The value to exchange.
`rhs`	The value to exchange. If `&lhs == &rhs`, this function call has no effect.

lhs

The value to exchange.

rhs

The value to exchange. If &lhs == &rhs, this function call has no effect.