Implement the hash pattern matching interface for ParseLexResult.
Implement the hash pattern matching interface for Token.
Implement the pretty print interface for Token.
Shortcut for combining two procs into one that returns true if either returns true.
Raise an error because the given node is not supported.
GNU Readline watis for “keyseq-timeout” milliseconds when the input is ambiguous whether it is matching or matched. If the next character does not arrive within the specified timeout, input is considered as matched. ‘ESC` is ambiguous because it can be a standalone ESC (matched) or part of `ESC char` or part of CSI sequence (matching).