feat: add range_description and info to diagnostic (#1298)

src/context.rs

@@ -442,6 +442,8 @@ impl<'a> Context<'a> {
  hint: maybe_hint,
  fixes,
  custom_docs_url: None,
+ range_description: None,
+ info: vec![],
  }
  }
 }

src/diagnostic.rs

@@ -44,6 +44,10 @@ pub struct LintDiagnostic {
  /// URL to the lint rule documentation. By default, the url uses the
  /// code to link to lint.deno.land
  pub custom_docs_url: Option<String>,
+ /// Additional information displayed beside the highlighted range.
+ pub range_description: Option<String>,
+ /// Displays additional information at the end of a diagnostic.
+ pub info: Vec<Cow<'static, str>>,
 }
 
 impl Diagnostic for LintDiagnostic {
@@ -77,7 +81,7 @@ impl Diagnostic for LintDiagnostic {
  highlights: vec![DiagnosticSnippetHighlight {
  range,
  style: DiagnosticSnippetHighlightStyle::Error,
- description: None,
+ description: self.range_description.as_deref().map(Cow::Borrowed),
  }],
  })
  }
@@ -91,7 +95,7 @@ impl Diagnostic for LintDiagnostic {
  }
 
  fn info(&self) -> Cow<'_, [std::borrow::Cow<'_, str>]> {
- Cow::Borrowed(&[])
+ Cow::Borrowed(&self.info)
  }
 
  fn docs_url(&self) -> Option<Cow<'_, str>> {