hayro_syntax/object/
null.rs

1//! The null object.
2
3use crate::object::Object;
4use crate::object::macros::object;
5use crate::reader::Reader;
6use crate::reader::{Readable, ReaderContext, Skippable};
7use core::fmt::{Display, Formatter};
8
9/// The null object.
10#[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
11pub struct Null;
12
13impl Display for Null {
14    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
15        f.write_str("null")
16    }
17}
18
19object!(Null, Null);
20
21impl Skippable for Null {
22    fn skip(r: &mut Reader<'_>, _: bool) -> Option<()> {
23        r.forward_tag(b"null")
24    }
25}
26
27impl Readable<'_> for Null {
28    fn read(r: &mut Reader<'_>, ctx: &ReaderContext<'_>) -> Option<Self> {
29        Self::skip(r, ctx.in_content_stream())?;
30
31        Some(Self)
32    }
33}
34
35#[cfg(test)]
36mod tests {
37    use crate::object::Null;
38    use crate::reader::Reader;
39    use crate::reader::ReaderExt;
40
41    #[test]
42    fn display() {
43        assert_eq!(format!("{}", Null), "null");
44    }
45
46    #[test]
47    fn null() {
48        assert_eq!(
49            Reader::new("null".as_bytes())
50                .read_without_context::<Null>()
51                .unwrap(),
52            Null
53        );
54    }
55
56    #[test]
57    fn null_trailing() {
58        assert_eq!(
59            Reader::new("nullabs".as_bytes())
60                .read_without_context::<Null>()
61                .unwrap(),
62            Null
63        );
64    }
65}
hayro_syntax/object/null.rs

hayro_syntax/object/
null.rs
