nullParser -- a terminal parser that returns the value nil
See also
nil -- a symbol a parser may return to indicate acceptance of the empty string of tokens
Code
-- Parsing.m2:52
terminalParser = val -> new Parser from (c -> if c === null then val)
| symbol class value location of symbol
| ------ ----- ----- ------------------
| val : Symbol -- nil Parsing.m2:52:17-52:17