gistfile1.rs

/*
  Syntax (whitespace is ignored):

  expr := '(' name (expr|val)* ')'
  val := symbol|int|bool|string|list|name
  symbol := ':' name
  int := 0..9+
  bool := 'true'|'false'
  string := '"' (escape|char)* '"'
  escape := '\\'|'\n'|'\t'|'\"'
  char := -('\n'|'\r'|'"')
  list := '[' atom* ']'
  name := (a..z|A..Z|_)+(a..z|A..Z|0..9|_)*
*/