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// re2rust $INPUT -o $OUTPUT
/*!max:re2c*/
fn lex(s: &[u8]) -> isize {
let mut count = 0;
let mut cur = 0;
let lim = s.len() + YYMAXFILL;
// Copy string to a buffer and add YYMAXFILL zero padding.
let mut buf = Vec::with_capacity(lim);
buf.extend(s.iter());
buf.extend(vec![0; YYMAXFILL]);
'lex: loop {/*!re2c
re2c:define:YYCTYPE = u8;
re2c:define:YYPEEK = "*buf.get_unchecked(cur)";
re2c:define:YYSKIP = "cur += 1;";
re2c:define:YYFILL = "return -1;";
re2c:define:YYLESSTHAN = "cur + @@ > lim";
str = ['] ([^'\\] | [\\][^])* ['];
[\x00] {
// Check that it is the sentinel, not some unexpected null.
return if cur == s.len() + 1 { count } else { -1 }
}
str { count += 1; continue 'lex; }
[ ]+ { continue 'lex; }
* { return -1; }
*/}
}
fn main() {
assert_eq!(lex(b""), 0);
assert_eq!(lex(b"'qu\0tes' 'are' 'fine: \\'' "), 3);
assert_eq!(lex(b"'unterminated\\'"), -1);
assert_eq!(lex(b"'unexpected \0 null"), -1);
}