-s ::= w* Grammar w* => "gram"
-ws !::= w*
-grammar ::= R+/ws => "grammar"
-Grammar ::= R+ => "grammar"
-R ::= word ^"::=" Alternatives
- | word ^"!::=" Alternatives
+s ::= ws grammar ws => "gram"
+ws !::= w**
+grammar ::= r $$ ws => "grammar"
+r ::= word ^"::=" alternatives /ws
+ | word ^"!::=" alternatives /ws
-ec ::= [~\]\\\-\~] | escaped
+alternatives ::= equiAlt $$ (ws ">" ws)
+equiAlt ::= conjuncts $$ (ws "|" ws) => "alternatives"
-Alternatives ::= EquiAlt +/ ">"
-EquiAlt ::= Conjuncts +/ "|" => "alternatives"
+sequence ::= es
+ > es ws ^"/" e
+Es ::= e %% (w**)
+es ::= e %% (w**)
-Sequence ::= E+ ^"/" E
- > E+
+ss ::= es | es ^"/" e /ws
-Conjuncts ::= Rewrite
- | Rewrite ^"&" Sequence
- | Rewrite ^"&~" Sequence
+conjuncts ::= rewrite
+ | rewrite ^"&" e%%ws /ws
+ | rewrite ^"&~" e%%ws /ws
-Rewrite ::= Sequence => "rewrite"
- | Sequence ^"=>" word
- | Sequence ^"=>" quoted
- | Sequence "=>" "()" => "wrap"
+rewrite ::= sequence /ws => "rewrite"
+ | sequence ^"=>" word /ws
+ | sequence ^"=>" quoted /ws
+ | sequence "=>" "()" /ws => "wrap"
-range ::= ec => "range0" | ec ^"-" ec => "range0"
-E ::= word => "nonTerminalY"
+ec ::= [~\-\]\\\~]
+ | escaped
+
+range ::= ec => "range0"
+ | ec ^"-" ec => "range1"
+
+e ::= word => "nonTerminalY"
| [(][)] => "epsilon"
- | ^"{" Alternatives "}"
- | "[" [\~]? range* "]" => "range"
- | E ^"*/" E
- | E ^"+/" E
- | E ^"?"
- | E ^"~/~"
-
- | E ^"-" E
-
- | ^"!" E
- | "^" quoted => "care"
- | ^"`" E
- | E ^"#"
+ | ^"{" alternatives "}" /ws
+ | "[" (range*) "]" => "range"
+ | "[~" (range*) "]" => "rangex"
+ | e ^"%%" e /ws
+ | e ^"$$" e /ws
+ | e ^"?" /ws
+ | e ^"~/~" /ws
+
+ | e ^"-" e /ws
+
+ | ^"!" e /ws
+ | "^" quoted /ws => "care"
+ | ^"`" e /ws
+ | e ^"#" /ws
| quoted => "literal"
- | (E ^"**" > E ^"*")
- | (E ^"++" > E ^"+")
+ | (e ws ^"**" > e ws ^"*")
+ | (e ws ^"++" > e ws ^"+")
- | "(" word ^")"
- > ^"(" Alternatives ")"
+ | "(" word ^")" /ws
+ > ^"(" alternatives ")" /ws
w !::= " "
- | "//" [~\n]* "\n"
+ | "//" ([~\n]*) "\n"
| "\n"
| "\r"
an ::= [a-zA-Z0-9_]
word ::= an++ => "sify"
-quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
+quoted ::= "\"" (([~\"\\] | escaped)*) "\"" => "sify"
escaped ::= "\\n" => "\n"
| "\\r" => "\r"
| "\\" [~nr]
+
+