-s ::= ws grammar ws => "gram"
-ws !::= w**
-grammar ::= r+/ws => "grammar"
-r ::= word ^"::=" alternatives /ws
- | word ^"!::=" alternatives /ws
+//funkanomitron
+s = ws Grammar ws
-ec ::= [~\]\\\-\~] | escaped
+Grammar:: = Declaration +/ ws
-alternatives ::= equiAlt +/ (ws ">" ws)
-equiAlt ::= conjuncts +/ (ws "|" ws) => "alternatives"
+Declaration = NonTerminal
+ | ^"#import" FileName /ws
+ | ^"#import" FileName "as" Word /ws
-sequence ::= Es
- > Es ^"/" e /ws
-Es ::= e+
-es ::= e+/ws
+FileName:: = (~[\r\n ] | escaped)+ -> [\r\n ]
+NonTerminal = NonTerminal:: Word ws "=" ws RHS
+ | DropNT:: Word "!" ws "=" ws RHS
+ | Colons:: Word "::" ws "=" ws RHS
+ | Word "*" ws ^"=" ws RHS
+ | Word "*/" Word ws ^"=" ws RHS
+
+RHS:: = ("|":: Sequence +/ (ws "|" ws)) +/ (ws (">" -> ~">") ws)
-conjuncts ::= rewrite
- | rewrite ^"&" sequence /ws
- | rewrite ^"&~" sequence /ws
+Elements:: = e*/ws
-rewrite ::= sequence /ws => "rewrite"
- | sequence ^"=>" word /ws
- | sequence ^"=>" quoted /ws
- | sequence "=>" "()" /ws => "wrap"
+PreSequence = Elements
+ | (Quoted|Word) ^"::" PreSequence /ws
+ > PreSequence ^"/" e /ws
+ | PreSequence ^"->" e /ws
-range ::= ec => "range0"
- | ec ^"-" ec => "range0"
+Sequence = PreSequence
+ | Sequence ^"&" Elements /ws
+ | ^"~~" Elements /ws
+ | Sequence ^"&~" Elements /ws
-e ::= word => "nonTerminalY"
- | [(][)] => "epsilon"
- | ^"{" alternatives "}" /ws
- | "[" [\~]? range* "]" => "range"
- | e ^"+/" e /ws
- | e ^"%%" e /ws
- | e ^"$$" e /ws
- | e ^"?" /ws
- | e ^"~/~" /ws
+e = e ^"!"
+ > (Quoted|Word) ^":" e
+ > NonTerminalReference:: Word
+ | Literal:: Quoted
+ | ^"()"
+ | ^"{" PreSequence "}" /ws
+ | ^"[" Range* "]"
+ | e ^"++" /ws -> ~[/]
+ | e ^"+" /ws -> ~[+]
+ | e ^"++/" e /ws
+ | e ^"+/" e /ws
+ | e ^"**" /ws -> ~[/]
+ | e ^"*" /ws -> ~[*]
+ | e ^"**/" e /ws
+ | e ^"*/" e /ws
+ | e ^"?" /ws
+ | ^"^" Quoted
+ | ^"`" e
+ | ^"..."
+ | "(" Word ^")"
+ > ^"(" RHS ")" /ws
+ | "~":: ("~" -> ~"~")! e
+ | ^"\\{"
+ | ^"\\}"
+ | ^">>"
+ | ^"<<"
- | e ^"-" e /ws
+Word:: = [.a-zA-Z0-9_]++ &~ "."+
+Quoted:: = "\"" (~[\"\\] | escaped)+ "\""
+ | "\"\""
- | ^"!" e /ws
- | "^" quoted /ws => "care"
- | ^"`" e /ws
- | e ^"#" /ws
- | quoted => "literal"
-
- | (e ws ^"**" > e ws ^"*")
- | (e ws ^"++" > e ws ^"+")
-
- | "(" word ^")" /ws
- > ^"(" alternatives ")" /ws
-
-w !::= " "
- | "//" [~\n]* "\n"
- | "\n"
- | "\r"
-an ::= [a-zA-Z0-9_]
-word ::= an++ => "sify"
-quoted ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
-escaped ::= "\\n" => "\n"
- | "\\r" => "\r"
- | "\\" [~nr]
+Range:: = ec
+ | ec "-" ec
+ | "<<":: [<][<]
+ | ">>":: [>][>]
+ec = ~[\-\]\\<>]
+ | [>] -> ~[>]
+ | [<] -> ~[<]
+ | escaped
+escaped = "\n":: "\\n"
+ | "\r":: "\\r"
+ | "\\" ~[nr]
+ws! = [ \r\n]**
+ | [ \r\n]** "//" ~[\n]* "\n" ws