object::swap

Swap two objects.

Synopsis

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

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

Description

Exchanges the contents of the object lhs with another object 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 making a copy, which can throw. In this case all iterators and references are invalidated.

Effects

lhs.swap( rhs );

Complexity

Constant or linear in lhs.size() + rhs.size().

Exception Safety

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

Parameters

Name Description

lhs

The object to exchange.

rhs

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

See Also

object::swap

Convenience header <boost/json.hpp>

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