From 49e64cb57556a920ddccd21d2028cf5d3fc8a112 Mon Sep 17 00:00:00 2001
From: Sosuke Suzuki <sosuke.suzuki@dr-ubie.com>
Date: Mon, 6 Mar 2023 00:51:21 +0900
Subject: [PATCH] fix(eslint-plugin): fix printing BigInt literal

---
 .../src/rules/no-redundant-type-constituents.ts             | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/eslint-plugin/src/rules/no-redundant-type-constituents.ts b/packages/eslint-plugin/src/rules/no-redundant-type-constituents.ts
index 33237a8ae4e..4e737b996b7 100644
--- a/packages/eslint-plugin/src/rules/no-redundant-type-constituents.ts
+++ b/packages/eslint-plugin/src/rules/no-redundant-type-constituents.ts
@@ -83,6 +83,12 @@ function describeLiteralType(type: ts.Type): string {
   }
 
   if (type.isLiteral()) {
+    if (typeof type.value === 'object') {
+      // Print ts.PseudoBigInt
+      return `${
+        type.value.negative ? '-' : ''
+      }${type.value.base10Value.toString()}n`;
+    }
     return type.value.toString();
   }