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let bot = !(/rec/ "a" . rec);
let zero = /zero suc/ zero;
let suc n = /zero suc/ suc (n zero suc);
let opt some = _ : None | some;
let plus iter = !(/plus/ iter . (opt plus));
let star iter = opt (plus iter);
let up_to x n = n bot (/rec/ x . opt rec);
let Pattern_Whitespace = "\t"|"\n"|"\x0B"|"\x0c"|"\r"|" "|"\u{85}"|"\u{200e}"|"\u{200f}"|"\u{2028}"|"\u{2029}";
let oct_digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" ;
let digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9";
let hex_digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" |
"a" | "b" | "c" | "d" | "e" | "f" |
"A" | "B" | "C" | "D" | "E" | "F" ;
let XID_Start =
"a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" |
"i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" |
"q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" |
"y" | "z" |
"A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" |
"I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" |
"Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" |
"Y" | "Z" ;
let XID_Continue =
XID_Start | "_" | "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
match
(" " | "!" | "#" | "$" | "%" | "&" | "'" |
"(" | ")" | "*" | "+" | "," | "-" | "." | "/" |
"0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" |
"8" | "9" | ":" | ";" | "<" | "=" | ">" | "?" |
"@" | "A" | "B" | "C" | "D" | "E" | "F" | "G" |
"H" | "I" | "J" | "K" | "L" | "M" | "N" | "O" |
"P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" |
"X"|"Y"
);
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