Implement a dead simple pseudo-EBNF to Pest translator, which works on Conlang's EBNF

test.grammatical

@@ -0,0 +1,18 @@
+(* Grammatical EBNF *)
+Ruleset     = (COMMENT? Rule)* EOI ;
+Rule        = ident '=' Either? ';' ;
+Either      = Follow ('|' Follow)* ;
+Follow      = (Any | Many | Maybe | Not)+ ;
+Any         = Not '*' ;
+Many        = Not '+' ;
+Maybe       = Not '?' ;
+Not         = '!'? Prime ;
+Prime       = Group | chr | str | ident ;
+Group       = '(' Either ')' ;
+
+ident       = XID_START XID_CONTINUE* ;
+str         = '"' (!'"' ANY)* '"' ;
+chr         = "'" (!"'" ANY)* "'" ;
+
+WHITESPACE  = WHITE_SPACE ;
+COMMENT     = "(*" (COMMENT | !"*)" ANY)* "*)" ;