This base class version simply returns 0 but a derived class should override this function if it needs to construct and run a NxsSetReader object to read a set involving characters. The NxsSetReader object may need to use this function to look up a character label encountered in the set. A class that overrides this method should return the character index in the range [1..nchar]. Reimplemented from NxsBlock. Definition at line 1876 of file nxscharactersblock.h. |