Method back_peek

crates/sre_engine/src/string.rs:76–78

(cursor: &StringCursor)

    #[inline]
    fn back_peek(cursor: &StringCursor) -> u32 {
        unsafe { *cursor.ptr.offset(-1) as u32 }
    }

    #[inline]
    fn back_skip(cursor: &mut StringCursor, n: usize) {