From c70f54fd3a46a12060ae3aec0faae872c431dd88 Mon Sep 17 00:00:00 2001
From: Brad Zacher <brad.zacher@gmail.com>
Date: Tue, 28 Jul 2020 11:00:05 -0700
Subject: [PATCH] fix(eslint-plugin): [no-unused-vars] handle TSCallSignature
 (#2336)

---
 .../eslint-plugin/src/rules/no-unused-vars.ts |  3 ++-
 .../tests/rules/no-unused-vars.test.ts        | 20 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/packages/eslint-plugin/src/rules/no-unused-vars.ts b/packages/eslint-plugin/src/rules/no-unused-vars.ts
index ad5d597edf5..85f80698579 100644
--- a/packages/eslint-plugin/src/rules/no-unused-vars.ts
+++ b/packages/eslint-plugin/src/rules/no-unused-vars.ts
@@ -84,8 +84,9 @@ export default util.createRule<Options, MessageIds>({
 
     return {
       ...rules,
-      'TSConstructorType, TSConstructSignatureDeclaration, TSDeclareFunction, TSEmptyBodyFunctionExpression, TSFunctionType, TSMethodSignature'(
+      'TSCallSignatureDeclaration, TSConstructorType, TSConstructSignatureDeclaration, TSDeclareFunction, TSEmptyBodyFunctionExpression, TSFunctionType, TSMethodSignature'(
         node:
+          | TSESTree.TSCallSignatureDeclaration
           | TSESTree.TSConstructorType
           | TSESTree.TSConstructSignatureDeclaration
           | TSESTree.TSDeclareFunction
diff --git a/packages/eslint-plugin/tests/rules/no-unused-vars.test.ts b/packages/eslint-plugin/tests/rules/no-unused-vars.test.ts
index 588b4141529..6baafcf9d29 100644
--- a/packages/eslint-plugin/tests/rules/no-unused-vars.test.ts
+++ b/packages/eslint-plugin/tests/rules/no-unused-vars.test.ts
@@ -729,6 +729,26 @@ export function foo() {
   return new Promise<Foo>();
 }
     `,
+    // https://github.com/typescript-eslint/typescript-eslint/issues/2331
+    {
+      code: `
+export interface Event<T> {
+  (
+    listener: (e: T) => any,
+    thisArgs?: any,
+    disposables?: Disposable[],
+  ): Disposable;
+}
+      `,
+      options: [
+        {
+          args: 'after-used',
+          argsIgnorePattern: '^_',
+          ignoreRestSiblings: true,
+          varsIgnorePattern: '^_$',
+        },
+      ],
+    },
   ],
 
   invalid: [