nom_kconfig/attribute/
depends_on.rs

1use nom::{
2    bytes::complete::tag,
3    combinator::{map, opt},
4    sequence::tuple,
5    IResult,
6};
7
8use crate::{util::wsi, KconfigInput};
9
10use super::{expression::parse_expression, Attribute};
11
12/// Parses a `depends on` attribute.
13/// If multiple dependencies are defined, they are connected with '&&'.
14/// Dependencies are applied to all other options within this menu entry (which also accept an "if" expression).
15/// See [https://www.kernel.org/doc/html/next/kbuild/kconfig-language.html#menu-attributes](https://www.kernel.org/doc/html/next/kbuild/kconfig-language.html#menu-attributes) for more information.
16///
17/// # Example
18/// ```
19/// use nom_kconfig::{
20///     assert_parsing_eq,
21///     attribute::{
22///         parse_depends_on,
23///         AndExpression, Atom, Expression, OrExpression, Term,
24///     },
25///     symbol::Symbol,
26///     Attribute
27/// };
28///
29/// assert_parsing_eq!(
30///     parse_depends_on,
31///     "depends on PCI",
32///     Ok((
33///         "",
34///         Attribute::DependsOn(Expression::Term(AndExpression::Term(
35///             Term::Atom(Atom::Symbol(Symbol::Constant("PCI".to_string())))
36///         )))
37///     ))
38/// )
39/// ```
40pub fn parse_depends_on(input: KconfigInput) -> IResult<KconfigInput, Attribute> {
41    map(
42        tuple((tag("depends"), wsi(opt(tag("on"))), wsi(parse_expression))),
43        |(_, _, e)| Attribute::DependsOn(e),
44    )(input)
45}
nom_kconfig/attribute/depends_on.rs

nom_kconfig/attribute/
depends_on.rs
