1pub fn is转义(line: impl AsRef<str>) -> bool { 2 let mut n = 0; 3 let line = line.as_ref(); 4 for c in line.chars().rev() { 5 if c == '\\' { 6 n += 1; 7 } else { 8 break; 9 } 10 } 11 n % 2 == 1 12}