Efficiently exchange the values of the specified a and b objects. This method provides the no-throw exception-safety guarantee if a and b allocators compare equal. Note that this function is only available for C++11 (and later) language standards.
Declared in <bslstl_ostringstream.h>
template<
class CHAR_TYPE,
class CHAR_TRAITS,
class ALLOCATOR>
void
swap(
basic_ostringstream<CHAR_TYPE, CHAR_TRAITS, ALLOCATOR>& a,
basic_ostringstream<CHAR_TYPE, CHAR_TRAITS, ALLOCATOR>& b);