vendor/annotate-snippets/examples/format.rs

   1 use annotate_snippets::{
   2     display_list::{DisplayList, FormatOptions},
   3     snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},
   4 };
   5
   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 }