reuse the type of args

sw1tch3roo · sw1tch3roo · commit 554ecd64c6d3 · 2025-08-02T20:37:11.000+03:00
diff --git a/types/stylelint/index.d.ts b/types/stylelint/index.d.ts
@@ -36,18 +36,20 @@ type FileCache = {
 	removeEntry: (absoluteFilepath: string) => void;
 };
 
+type RuleFuncArgs = (string | number | boolean | RegExp | string[])[];
+
 // Note: With strict function types enabled, function signatures are checked contravariantly.
 // This means that it would not be possible for rule authors to narrow the message function
 // parameters to e.g. just `string`. Declaring the type for rule message functions through
 // method declarations tricks TypeScript into bivariant signature checking. More details can
 // be found here: https://stackoverflow.com/questions/52667959/what-is-the-purpose-of-bivariancehack-in-typescript-types.
 // and in the original discussion: https://github.com/stylelint/stylelint/pull/6147#issuecomment-1155337016.
 type RuleMessageFunc = {
-	bivariance(...args: (string | number | boolean | RegExp | string[])[]): string;
+	bivariance(...args: RuleFuncArgs): string;
 }['bivariance'];
 
 type RuleSeverityFunc = {
-	bivariance(...args: (string | number | boolean | RegExp | string[])[]): stylelint.Severity | null;
+	bivariance(...args: RuleFuncArgs): stylelint.Severity | null;
 }['bivariance'];
 
 type RuleOptionsPossibleFunc = (value: unknown) => boolean;
