bsl::basic_ostringstream::basic_ostringstream

Create a basic_ostringstream object. Use the specified initialString indicating the value that will be returned by a call to str prior to any streaming operations performed on this object. Optionally specify a modeBitMask indicating whether the underlying stream‐buffer may also be read from (rdbuf is created using modeBitMask | ios_base::out). If modeBitMask is not supplied, rdbuf will be created using ios_base::out. Optionally specify the allocator used to supply memory. If allocator is not supplied, the allocator in initialString is used. initialString is left in a valid but unspecified state.