syncat_stylesheet/ast/
helper.rs

1use tree_sitter::TreeCursor;
2
3macro_rules! extras {
4    ($tree:ident, $context:literal) => {
5        while $tree.node().is_extra() || !$tree.node().is_named() {
6            if !$tree.goto_next_sibling() {
7                return Err($crate::Error::invalid(
8                    concat!("extras(", $context, ")"),
9                    "no more children",
10                ));
11            }
12        }
13    };
14}
15
16#[macro_export]
17macro_rules! children {
18    ($tree:ident, $name:literal) => {{
19        extras!($tree, $name);
20        match $tree.node().kind() {
21            $name => $tree.goto_first_child(),
22            name => {
23                return Err($crate::Error::invalid(
24                    concat!("children(", $name, ")"),
25                    name,
26                ));
27            }
28        }
29    }};
30}
31
32#[macro_export]
33macro_rules! text {
34    ($tree:ident, $source:expr, $name:literal) => {{
35        extras!($tree, $name);
36        match $tree.node().kind() {
37            $name => $tree.node().utf8_text($source),
38            name => return Err($crate::Error::invalid(concat!("text(", $name, ")"), name)),
39        }
40    }};
41}
42
43pub(super) trait FromSource: Sized {
44    fn from_source(tree: &mut TreeCursor, source: &[u8]) -> Result<Self, crate::Error>;
45}
syncat_stylesheet/ast/helper.rs

syncat_stylesheet/ast/
helper.rs
