log_init 0.1.39

Smart logging initialization with automatic backend detection / 智能日志初始化与自动后端检测
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

use std::fmt::Write;

use log::kv;
use logforth::{
  Error as LogforthError,
  kv::{KeyView, ValueView, Visitor},
};

#[derive(Debug, Default)]
pub struct Kv {
  pub text: String,
}

impl Kv {
  pub const fn new() -> Self {
    Self { text: String::new() }
  }

  pub fn with_capacity(capacity: usize) -> Self {
    Self {
      text: String::with_capacity(capacity),
    }
  }
}

impl<'kvs> kv::VisitSource<'kvs> for Kv {
  fn visit_pair(&mut self, key: kv::Key<'kvs>, value: kv::Value<'kvs>) -> Result<(), kv::Error> {
    KvRef(&mut self.text).visit_pair(key, value)
  }
}

impl Visitor for Kv {
  fn visit(&mut self, key: KeyView<'_>, value: ValueView<'_>) -> Result<(), LogforthError> {
    KvRef(&mut self.text).visit(key, value)
  }
}

pub(crate) struct KvRef<'a>(pub &'a mut String);

impl<'kvs> kv::VisitSource<'kvs> for KvRef<'_> {
  fn visit_pair(&mut self, key: kv::Key<'kvs>, value: kv::Value<'kvs>) -> Result<(), kv::Error> {
    let _ = write!(self.0, " {key}={value}");
    Ok(())
  }
}

impl Visitor for KvRef<'_> {
  fn visit(&mut self, key: KeyView<'_>, value: ValueView<'_>) -> Result<(), LogforthError> {
    let _ = write!(self.0, " {key}={value}");
    Ok(())
  }
}