tests/meta.g

   1 s         ::=  ws Grammar ws                  => "gram"
   2 ws       !::=  w**
   3 grammar   ::=  R+/ws => "grammar"
   4 Grammar   ::=  R+ => "grammar"
   5 R         ::=  word  ^"::=" Alternatives
   6             |  word ^"!::=" Alternatives
   7
   8 ec        ::=  [~\]\\\-\~] | escaped
   9
  10 Alternatives  ::=  EquiAlt   +/ ">"
  11 EquiAlt       ::=  Conjuncts +/ "|"                 => "alternatives"
  12
  13 sequence    ::= Es
  14               > Es ^"/" E   /ws
  15 Es          ::= E+
  16 //es          ::= E+/ws
  17
  18 Conjuncts   ::=  rewrite
  19               |  rewrite ^"&"  sequence
  20               |  rewrite ^"&~" sequence
  21
  22 rewrite  ::=  sequence                  /ws        => "rewrite"
  23            |  sequence ^"=>" word       /ws
  24            |  sequence ^"=>" quoted     /ws
  25            |  sequence  "=>" "()"       /ws        => "wrap"
  26
  27 range    ::= ec => "range0" | ec ^"-" ec      => "range0"
  28 E        ::= word                             => "nonTerminalY"
  29            |    [(][)] => "epsilon"
  30            |    ^"{" Alternatives "}"
  31            |     "[" [\~]?  range* "]"        => "range"
  32            |  E ^"*/" E
  33            |  E ^"+/" E
  34            |  E ^"?"
  35            |  E ^"~/~"
  36
  37            |  E ^"-"  E
  38
  39            |    ^"!" E
  40            |     "^" quoted => "care"
  41            |    ^"`" E
  42            |  E ^"#"
  43            |  quoted                        => "literal"
  44
  45            |  (E ^"**" > E ^"*")
  46            |  (E ^"++" > E ^"+")
  47
  48            |     "(" word ^")"
  49            >    ^"(" Alternatives ")"
  50
  51 w       !::= " "
  52            | "//" [~\n]* "\n"
  53            | "\n"
  54            | "\r"
  55 an       ::= [a-zA-Z0-9_]
  56 word     ::= an++                           => "sify"
  57 quoted   ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
  58 escaped  ::= "\\n" => "\n"
  59            | "\\r" => "\r"
  60            | "\\" [~nr]