tests/meta.g

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