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
|
//! Minimal stderr logging utilities.
/// Logging verbosity level.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum Verbosity {
/// Suppress warnings and informational messages.
Quiet,
/// Emit warnings but suppress informational messages.
Normal,
/// Emit warnings and informational messages.
Verbose,
}
/// Lightweight logger used by renderers and generators.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct Logger {
verbosity: Verbosity,
}
impl Logger {
/// Creates a logger with the given verbosity.
pub fn new(verbosity: Verbosity) -> Self {
Self { verbosity }
}
/// Emits a warning unless verbosity is [`Verbosity::Quiet`].
pub fn warn(&self, message: impl AsRef<str>) {
if self.verbosity != Verbosity::Quiet {
eprintln!("Warning: {}", message.as_ref());
}
}
/// Emits an informational message only when verbosity is [`Verbosity::Verbose`].
pub fn info(&self, message: impl AsRef<str>) {
if self.verbosity == Verbosity::Verbose {
eprintln!("Info: {}", message.as_ref());
}
}
}
impl Default for Logger {
fn default() -> Self {
Self {
verbosity: Verbosity::Quiet,
}
}
}
|
