dbus_message_parser/match_rule/
arg.rs

1use super::{escape::escape, MatchRuleError};
2use std::{
3    convert::TryFrom,
4    fmt::{Display, Formatter, Result as FmtResult},
5};
6
7pub const MAXIMUM_ARG_INDEX: usize = 64;
8
9#[derive(Debug, PartialEq, Eq)]
10pub struct Arg(usize, String);
11
12impl Arg {
13    pub fn get_key(&self) -> String {
14        format!("arg{}", self.get_index())
15    }
16
17    pub fn get_index(&self) -> usize {
18        self.0
19    }
20
21    pub fn get_value(&self) -> &str {
22        self.1.as_str()
23    }
24}
25
26impl TryFrom<(usize, String)> for Arg {
27    type Error = MatchRuleError;
28
29    fn try_from(arg: (usize, String)) -> Result<Self, Self::Error> {
30        if MAXIMUM_ARG_INDEX <= arg.0 {
31            return Err(MatchRuleError::ArgIndexTooBig(arg.0));
32        }
33        Ok(Arg(arg.0, arg.1))
34    }
35}
36
37impl Display for Arg {
38    fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
39        write!(f, "{}", escape(self.1.as_str()))
40    }
41}