nom::escaped

macro_rules! escaped {
    ($i:expr, $submac:ident!( $($args:tt)* ), $control_char: expr, $($rest:tt)+) => { ... };
    ($i:expr, $f:expr, $control_char: expr, $($rest:tt)+) => { ... };
}

escaped!(&[T] -> IResult<&[T], &[T]>, T, &[T] -> IResult<&[T], &[T]>) => &[T] -> IResult<&[T], &[T]> matches a byte string with escaped characters.

The first argument matches the normal characters (it must not accept the control character), the second argument is the control character (like \ in most languages), the third argument matches the escaped characters

 named!(esc, escaped!(call!(alpha), '\\', is_a_bytes!(&b"\"n\\"[..])));
 assert_eq!(esc(&b"abcd"[..]), Done(&b""[..], &b"abcd"[..]));
 assert_eq!(esc(&b"ab\\\"cd"[..]), Done(&b""[..], &b"ab\\\"cd"[..]));