Function nom::eof

pub fn eof<'a, T: ?Sized>(input: &'a T) -> IResult<&'a T, &'a T> where
    T: Index<Range<usize>, Output = T> + Index<RangeFrom<usize>, Output = T>,
    &'a T: InputLength, 

Recognizes empty input buffers

useful to verify that the previous parsers used all of the input