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// re2rust $INPUT -o $OUTPUT // Expect a string without terminating null. fn lex(s: &[u8]) -> isize { let (mut cur, mut mar) = (0, 0); let lim = s.len(); let mut count = 0; 'lex: loop {/*!re2c re2c:define:YYCTYPE = u8; re2c:define:YYPEEK = "if cur < lim {*s.get_unchecked(cur)} else {0}"; re2c:define:YYSKIP = "cur += 1;"; re2c:define:YYBACKUP = "mar = cur;"; re2c:define:YYRESTORE = "cur = mar;"; re2c:define:YYLESSTHAN = "cur >= lim"; re2c:yyfill:enable = 0; re2c:eof = 0; str = ['] ([^'\\] | [\\][^])* [']; * { return -1; } $ { return count; } str { count += 1; continue 'lex; } [ ]+ { continue 'lex; } */} } fn main() { assert_eq!(lex(b""), 0); assert_eq!(lex(b"'qu\0tes' 'are' 'fine: \\'' "), 3); assert_eq!(lex(b"'unterminated\\'"), -1); }