-s = ws grammar:Grammar ws
+s = !ws Grammar !ws
+
Grammar = NonTerminal +/ ws
-NonTerminal = Word ^"=" RHS /ws
+
+NonTerminal = Word "=" RHS /ws
+
+// use 'a'-'z' or 'a-z' instead of [a-z]?
+// EOF token?
+// #include (with renaming?)
+// ANTLR uses ! and ^ suffixes
RHS = (Sequence +/ (!ws "|" !ws)) +/ (!ws ">" !ws)
> nonTerminal:: Word
| literal:: Quoted
| ^"()"
- | ^"{" Sequence "}" /ws
+ | ^"{" PreSequence "}" /ws
| ^"[" Range* "]"
| e ^"++" /ws -> ~[/]
| e ^"+" /ws -> ~[+]
| "(" Word ^")" /ws
> ^"(" RHS ")" /ws
| ^"~" e
- > "^^":: "^" e
+ > "^^":: "^" e
Word = [a-zA-Z0-9_]++
Quoted = "\"" ((~[\"\\] | escaped)+) "\""
w = " " | "\n" | "\r"
ws = "()":: w**
- | "()":: w** "//" ~[\n]* "\n" ws
+ | "()":: w** "//" (~[\n])* "\n" ws
wp = w++