s ::= Grammar ws => "gram"
-ws !::= w** | w** "//" (~[\n]*) "\n" ws
-wp !::= w++
+w ::= " "
+ | "\n"
+ | "\r"
+ws ::= w** => ()
+ | w** "//" (~[\n]*) "\n" ws => ()
+wp ::= w++
Grammar ::= r +/ ws => "grammar"
r ::= word ^"::=" alternatives /ws
| word ^"!::=" alternatives /ws
-alternatives ::= (Conjuncts +/ (ws "|" ws)) +/ (ws ">" ws)
+alternatives ::= (Conjuncts +/ (!ws "|" !ws)) +/ (!ws ">" !ws)
-Conjuncts ::= Sequence
- | Sequence ^"&" e*/ws /ws
- | Sequence ^"&~" e*/ws /ws
+Conjuncts ::= Sequence
+ | Sequence ^"&" e*/ws /ws
+ | Sequence ^"&~" e*/ws /ws
ps ::= e*/ws => "ps"
- | (e+/ws ws)? "^" Quoted (ws e+/ws)? => "ps2"
+ | (e+/ws !ws)? "^" Quoted (!ws e+/ws)? => "ps2"
psy ::= ps
- | ps wp ^"/" ws e
+ | ps !wp ^"/" !ws e
psx ::= psy => "psy"
// | e "<-" psy /ws => "psyl"
| psy "->" e /ws => "psyr"
// | e "<-" psy "->" e /ws => "psylr"
Sequence ::= Quoted => "qprod"
- > psx
+ > psx => "psx"
| psx "=>" ^"[]" /ws
- | psx ^"=>" (word|Quoted) /ws
+ | psx ^"=>" ("()"|word|Quoted) /ws
ec ::= ~[\-\]\\]
| escaped
| (e ^"++/" e /ws > e ^"+/" e /ws)
| (e ^"**" /ws > e ^"*" /ws)
| (e ^"**/" e /ws > e ^"*/" e /ws)
+ | ^"!" e /ws
| e ^"?" /ws
| "(" word ^")" /ws
> ^"(" alternatives ")" /ws
| ^"~" e
-w !::= " "
- | "\n"
- | "\r"
word ::= [a-zA-Z0-9_]++
Quoted ::= "\"" ((~[\"\\] | escaped)+) "\""
| "\"\"" => ""