s ::= ws grammar ws => "gram"
ws !::= w**
-grammar ::= r+/ws => "grammar"
+grammar ::= r $$ ws => "grammar"
r ::= word ^"::=" alternatives /ws
| word ^"!::=" alternatives /ws
-ec ::= [~\]\\\-\~] | escaped
-
-alternatives ::= equiAlt +/ (ws ">" ws)
-equiAlt ::= conjuncts +/ (ws "|" ws) => "alternatives"
+alternatives ::= equiAlt $$ (ws ">" ws)
+equiAlt ::= conjuncts $$ (ws "|" ws) => "alternatives"
sequence ::= Es
- > Es ^"/" e /ws
-Es ::= e+
-es ::= e+/ws
+ > Es ws ^"/" e
+Es ::= e %% (w**)
+es ::= e %% (w**)
+ss ::= es | es ^"/" e /ws
conjuncts ::= rewrite
- | rewrite ^"&" sequence /ws
- | rewrite ^"&~" sequence /ws
+ | rewrite ^"&" e%%ws /ws
+ | rewrite ^"&~" e%%ws /ws
rewrite ::= sequence /ws => "rewrite"
| sequence ^"=>" word /ws
| sequence ^"=>" quoted /ws
| sequence "=>" "()" /ws => "wrap"
+ec ::= [~\-\]\\\~]
+ | escaped
+
range ::= ec => "range0"
- | ec ^"-" ec => "range0"
+ | ec ^"-" ec => "range1"
e ::= word => "nonTerminalY"
| [(][)] => "epsilon"
| ^"{" alternatives "}" /ws
- | "[" [\~]? range* "]" => "range"
- | e ^"+/" e /ws
+ | "[" ranges "]" => "range"
+ | "[~" ranges "]" => "rangex"
| e ^"%%" e /ws
| e ^"$$" e /ws
| e ^"?" /ws
| "(" word ^")" /ws
> ^"(" alternatives ")" /ws
+ranges ::= range*
+
w !::= " "
| "//" [~\n]* "\n"
| "\n"