add explainations to each lint

1 files changed, 28 insertions, 0 deletions

diff --git a/lib/src/lints/legacy_let_syntax.rs b/lib/src/lints/legacy_let_syntax.rs
index 8b37df8..139f633 100644
--- a/lib/src/lints/legacy_let_syntax.rs
+++ b/lib/src/lints/legacy_let_syntax.rs
@@ -7,6 +7,34 @@ use rnix::{
     NodeOrToken, SyntaxElement, SyntaxKind,
 };
 
+/// ## What it does
+/// Checks for legacy-let syntax that was never formalized.
+///
+/// ## Why is this bad?
+/// This syntax construct is undocumented, refrain from using it.
+///
+/// ## Example
+///
+/// Legacy let syntax makes use of an attribute set annotated with
+/// `let` and expects a `body` attribute.
+/// ```
+/// let {
+///   body = x + y;
+///   x = 2;
+///   y = 3;
+/// }
+/// ```
+///
+/// This is trivially representible via `rec`, which is documented
+/// and more widely known:
+///
+/// ```
+/// rec {
+///   body = x + y;
+///   x = 2;
+///   y = 3;
+/// }.body
+/// ```
 #[lint(
     name = "legacy let syntax",
     note = "Using undocumented `let` syntax",