css_ast/functions/
first_valid_function.rs

1use super::prelude::*;
2
3/// first-valid() function: returns the first syntactically valid value from a comma list.
4///
5/// <https://drafts.csswg.org/css-values-5/#first-valid>
6///
7/// ```text,ignore
8/// first-valid() = first-valid( <declaration-value># )
9/// ```
10#[node]
11#[derive(Parse, Peek, ToCursors, ToSpan, SemanticEq, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
12#[cfg_attr(feature = "serde", derive(serde::Serialize), serde())]
13#[cfg_attr(feature = "visitable", derive(csskit_derives::Visitable), visit)]
14#[derive(csskit_derives::NodeWithMetadata)]
15#[metadata(declaration_kinds = Computed)]
16pub struct FirstValidFunction<'a, V> {
17	#[cfg_attr(feature = "visitable", visit(skip))]
18	#[semantic_eq(skip)]
19	#[atom(CssAtomSet::FirstValid)]
20	pub name: Function,
21	pub body: CommaSeparated<'a, V>,
22	#[cfg_attr(feature = "visitable", visit(skip))]
23	#[semantic_eq(skip)]
24	pub close: RightParen,
25}
26
27#[cfg(test)]
28mod tests {
29	use super::*;
30	use crate::{CalcableValue, CssAtomSet, Length, Value};
31	use css_parse::assert_parse;
32
33	type FirstValidLength<'a> = FirstValidFunction<'a, Value<'a, Length>>;
34	type CalcableFirstValidLength<'a> = FirstValidFunction<'a, CalcableValue<'a, Length>>;
35
36	#[test]
37	fn test_first_valid_function() {
38		assert_parse!(CssAtomSet::ATOMS, FirstValidLength, "first-valid(1px, 2em, 3rem)");
39		assert_parse!(CssAtomSet::ATOMS, FirstValidLength, "first-valid(var(--x), 10px)");
40	}
41
42	#[test]
43	fn test_calcable_first_valid_function() {
44		assert_parse!(CssAtomSet::ATOMS, CalcableFirstValidLength, "first-valid(calc(1px + 2px), 10px)");
45	}
46}
css_ast/functions/first_valid_function.rs

css_ast/functions/
first_valid_function.rs
