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-rw-r--r--lib/src/lints/deprecated_is_null.rs19
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/src/lints/deprecated_is_null.rs b/lib/src/lints/deprecated_is_null.rs
index 99fb3fb..fce6931 100644
--- a/lib/src/lints/deprecated_is_null.rs
+++ b/lib/src/lints/deprecated_is_null.rs
@@ -7,6 +7,25 @@ use rnix::{
7 NodeOrToken, SyntaxElement, SyntaxKind, 7 NodeOrToken, SyntaxElement, SyntaxKind,
8}; 8};
9 9
10/// ## What it does
11/// Checks for usage of the `isNull` function.
12///
13/// ## Why is this bad?
14/// `isNull` is deprecated.
15///
16/// ## Example
17///
18/// Instead of `isNull` for `null` checks,
19///
20/// ```nix
21/// isNull e
22/// ```
23///
24/// use the equality operator:
25///
26/// ```nix
27/// e == null
28/// ```
10#[lint( 29#[lint(
11 name = "deprecated isNull", 30 name = "deprecated isNull",
12 note = "Found usage of deprecated builtin isNull", 31 note = "Found usage of deprecated builtin isNull",