nom_kconfig/attribute/
depends_on.rs

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

nom_kconfig/attribute/
depends_on.rs
