terminator 0.3.2

Formatter for pretty panics and errors
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

use std::fmt::Result;
use std::fmt::Write;

pub struct Indent<'a, F>
where
    F: Write + ?Sized,
{
    indentation: &'a str,
    writer: &'a mut F,
    requires: bool,
}

impl<'a, F> Indent<'a, F>
where
    F: Write + ?Sized,
{
    pub fn new(writer: &'a mut F, indentation: &'a str) -> Self {
        Self {
            indentation,
            writer,
            requires: true,
        }
    }

    pub fn double(writer: &'a mut F) -> Self {
        Self::new(writer, "  ")
    }
}

impl<F> Write for Indent<'_, F>
where
    F: Write + ?Sized,
{
    fn write_str(&mut self, s: &str) -> Result {
        for (ind, line) in s.split('\n').enumerate() {
            if ind > 0 {
                self.writer.write_char('\n')?;
                self.requires = true;
            }

            // Don't render the line unless its actually got text on it
            if line.is_empty() {
                continue;
            }

            if self.requires {
                self.writer.write_str(self.indentation)?;
                self.requires = false;
            }

            self.writer.write_str(line)?;
        }

        Ok(())
    }
}