Add information about previous / next token to each terminal
add_terminal_token_after(pd_flat)add_terminal_token_before(pd_flat)
remove_terminal_token_before_and_after(pd_flat)
A flat parse table.
remove_terminal_token_before_and_after
: Removes column terimnal_token_before
. Might
be used to prevent the use of invalidated information, e.g. if tokens were
added to the nested parse table.