basic_string() [24/28]

template<typename _CharT, typename _Traits, typename _Alloc>

std::basic_string< _CharT, _Traits, _Alloc >::basic_string ( basic_string< _CharT, _Traits, _Alloc > && __str )

inlinenoexcept

Move construct string.

Parameters

__str

Source string.

The newly-created string contains the exact contents of __str. __str is a valid, but unspecified string.

Definition at line 624 of file cow_string.h.

      : _M_dataplus(std::move(__str._M_dataplus))
      {
#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
      // Make __str use the shared empty string rep.
      __str._M_data(_S_empty_rep()._M_refdata());
#else
      // Rather than allocate an empty string for the rvalue string,
      // just share ownership with it by incrementing the reference count.
      // If the rvalue string was the unique owner then there are exactly
      // two owners now.
      if (_M_rep()->_M_is_shared())
        __gnu_cxx::__atomic_add_dispatch(&_M_rep()->_M_refcount, 1);
      else
        _M_rep()->_M_refcount = 1;
#endif
      }