nom-kconfig 0.9.0

A Kconfig parser
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

pub mod atom;
pub mod compare;
#[cfg(test)]
mod mod_test;
pub mod term;

pub use atom::*;
pub use compare::*;
pub use term::*;

#[cfg(feature = "display")]
use std::fmt::Display;

use nom::{
    bytes::complete::tag,
    combinator::{map, opt},
    multi::many0,
    sequence::{pair, preceded},
    IResult, Parser,
};
#[cfg(feature = "deserialize")]
use serde::Deserialize;
#[cfg(feature = "serialize")]
use serde::Serialize;

use crate::{util::wsi, KconfigInput};

#[derive(Debug, PartialEq, Clone)]
#[cfg_attr(feature = "serialize", derive(Serialize))]
#[cfg_attr(feature = "deserialize", derive(Deserialize))]
pub enum Operator {
    And,
    Or,
}

// https://stackoverflow.com/questions/9509048/antlr-parser-for-and-or-logic-how-to-get-expressions-between-logic-operators
pub type Expression = OrExpression;
#[cfg_attr(feature = "hash", derive(Hash))]
#[cfg_attr(feature = "serialize", derive(Serialize))]
#[cfg_attr(feature = "deserialize", derive(Deserialize))]
#[derive(Debug, PartialEq, Clone)]
pub enum AndExpression {
    #[cfg_attr(feature = "serialize", serde(rename = "AndTerm"))]
    Term(Term),
    #[cfg_attr(feature = "serialize", serde(rename = "And"))]
    Expression(Vec<Term>),
}

#[derive(Debug, PartialEq, Clone)]
#[cfg_attr(feature = "hash", derive(Hash))]
#[cfg_attr(feature = "serialize", derive(Serialize))]
#[cfg_attr(feature = "deserialize", derive(Deserialize))]
pub enum OrExpression {
    #[cfg_attr(feature = "serialize", serde(rename = "OrTerm"))]
    Term(AndExpression),
    #[cfg_attr(feature = "serialize", serde(rename = "Or"))]
    Expression(Vec<AndExpression>),
}

#[cfg(feature = "display")]
impl Display for AndExpression {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Self::Term(t) => write!(f, "{}", t),
            Self::Expression(t) => write!(
                f,
                "{}",
                t.iter()
                    .map(|a| a.to_string())
                    .collect::<Vec<_>>()
                    .join(" && ")
            ),
        }
    }
}

#[cfg(feature = "display")]
impl Display for OrExpression {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Self::Term(t) => write!(f, "{}", t),
            Self::Expression(t) => write!(
                f,
                "{}",
                t.iter()
                    .map(|a| a.to_string())
                    .collect::<Vec<_>>()
                    .join(" || ")
            ),
        }
    }
}

pub fn parse_or_expression(input: KconfigInput) -> IResult<KconfigInput, OrExpression> {
    map(
        (
            wsi(parse_and_expression),
            many0(preceded(wsi(tag("||")), wsi(parse_and_expression))),
        ),
        |(l, ee)| {
            if ee.is_empty() {
                OrExpression::Term(l)
            } else {
                let mut ll = vec![l];
                ll.extend(ee);
                OrExpression::Expression(ll)
            }
        },
    )
    .parse(input)
}

pub fn parse_and_expression(input: KconfigInput) -> IResult<KconfigInput, AndExpression> {
    map(
        (
            wsi(parse_term),
            many0(preceded(wsi(tag("&&")), wsi(parse_term))),
        ),
        |(l, ee)| {
            if ee.is_empty() {
                AndExpression::Term(l)
            } else {
                let mut ll = vec![l];
                ll.extend(ee);
                AndExpression::Expression(ll)
            }
        },
    )
    .parse(input)
}

pub fn parse_expression(input: KconfigInput) -> IResult<KconfigInput, Expression> {
    parse_or_expression(input)
}

pub fn parse_if_attribute(input: KconfigInput) -> IResult<KconfigInput, Option<Expression>> {
    opt(parse_if_expression).parse(input)
}

pub fn parse_if_expression(input: KconfigInput) -> IResult<KconfigInput, Expression> {
    map(pair(wsi(tag("if")), wsi(parse_expression)), |(_, e)| e).parse(input)
}