@uml Get the index into the current line for the current position in the input stream. The first character on a line has position 0.
@return The line number for the current position in the input stream, or -1 if the current token source does not track character positions.
See Implementation
@uml Get the index into the current line for the current position in the input stream. The first character on a line has position 0.
@return The line number for the current position in the input stream, or -1 if the current token source does not track character positions.