org_rust_parser/element/
comment.rs

1use crate::constants::NEWLINE;
2use crate::node_pool::NodeID;
3use crate::types::{Cursor, ParseOpts, Parseable, Parser, Result};
4use crate::utils::bytes_to_str;
5
6#[derive(Debug, Clone, Copy)]
7pub struct Comment<'a>(pub &'a str);
8
9impl<'a> Parseable<'a> for Comment<'a> {
10    fn parse(
11        parser: &mut Parser<'a>,
12        mut cursor: Cursor<'a>,
13        parent: Option<NodeID>,
14        parse_opts: ParseOpts,
15    ) -> Result<NodeID> {
16        let start = cursor.index;
17        if cursor.peek(1)?.is_ascii_whitespace() {
18            let prev = cursor.index;
19            cursor.adv_till_byte(NEWLINE);
20            let val = bytes_to_str(&cursor.byte_arr[(prev + 2)..cursor.index]);
21            // TODO: use an fn_until_inclusive to not have to add 1 to the end
22            // (we want to eat the ending nl too)
23            Ok(parser.alloc(Self(val), start, cursor.index + 1, parent))
24        } else {
25            Err(crate::types::MatchError::InvalidLogic)
26        }
27    }
28}
29
30#[cfg(test)]
31mod tests {
32    use crate::types::Expr;
33    use crate::{expr_in_pool, parse_org};
34
35    #[test]
36    fn basic_comment() {
37        let inp = "# this is a comment\n";
38
39        let parsed = parse_org(inp);
40
41        let l = expr_in_pool!(parsed, Comment).unwrap();
42        assert_eq!(l.0, "this is a comment")
43    }
44
45    #[test]
46    fn comment_eof() {
47        let inp = "# this is a comment";
48
49        let parsed = parse_org(inp);
50
51        let l = expr_in_pool!(parsed, Comment).unwrap();
52        assert_eq!(l.0, "this is a comment")
53    }
54
55    #[test]
56    fn basic_comment_not() {
57        let inp = "#this is not a comment";
58        let parsed = parse_org(inp);
59        let c = expr_in_pool!(parsed, Comment);
60        assert!(c.is_none());
61    }
62}
org_rust_parser/element/comment.rs

org_rust_parser/element/
comment.rs
