Class StringData.

This private helper class contains the actual string data. It has three fields, all accessible only to string. The only noteworthy field is max, which is 0 in the case of a shared/read-only string, and nonzero in the case of a string which can be modified.

StringData::StringData( int bytes )

Creates a new String with bytes capacity.

StringData::StringData()

Creates a zero-length string. This is naturally read-only.

Reimplements Garbage::Garbage().