1 use annotate_snippets::{
2 display_list::{DisplayList, FormatOptions},
3 snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},
4 };
5
main()6 fn main() {
7 let snippet = Snippet {
8 slices: vec![Slice {
9 source: r#") -> Option<String> {
10 for ann in annotations {
11 match (ann.range.0, ann.range.1) {
12 (None, None) => continue,
13 (Some(start), Some(end)) if start > end_index => continue,
14 (Some(start), Some(end)) if start >= start_index => {
15 let label = if let Some(ref label) = ann.label {
16 format!(" {}", label)
17 } else {
18 String::from("")
19 };
20
21 return Some(format!(
22 "{}{}{}",
23 " ".repeat(start - start_index),
24 "^".repeat(end - start),
25 label
26 ));
27 }
28 _ => continue,
29 }
30 }"#,
31 line_start: 51,
32 origin: Some("src/format.rs"),
33 fold: false,
34 annotations: vec![
35 SourceAnnotation {
36 label: "expected `Option<String>` because of return type",
37 annotation_type: AnnotationType::Warning,
38 range: (5, 19),
39 },
40 SourceAnnotation {
41 label: "expected enum `std::option::Option`",
42 annotation_type: AnnotationType::Error,
43 range: (26, 724),
44 },
45 ],
46 }],
47 title: Some(Annotation {
48 label: Some("mismatched types"),
49 id: Some("E0308"),
50 annotation_type: AnnotationType::Error,
51 }),
52 footer: vec![],
53 opt: FormatOptions {
54 color: true,
55 ..Default::default()
56 },
57 };
58
59 let dl = DisplayList::from(snippet);
60 println!("{}", dl);
61 }
62