From 030da71b0fe66df4333a0d42771b4414a18ea9f8 Mon Sep 17 00:00:00 2001
From: AllanZhengYP <zheallan@amazon.com>
Date: Mon, 14 Feb 2022 11:50:26 -0800
Subject: [PATCH] feat(smithy-client): add ExceptionOptionType type (#3314)

---
 packages/smithy-client/src/exceptions.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/packages/smithy-client/src/exceptions.ts b/packages/smithy-client/src/exceptions.ts
index 85b420cfef28..72cb433145d2 100644
--- a/packages/smithy-client/src/exceptions.ts
+++ b/packages/smithy-client/src/exceptions.ts
@@ -1,5 +1,16 @@
 import { HttpResponse, MetadataBearer, ResponseMetadata, RetryableTrait, SmithyException } from "@aws-sdk/types";
 
+/**
+ * The type of the exception class constructor parameter. The returned type contains the properties
+ * in the `ExceptionType` but not in the `BaseExceptionType`. If the `BaseExceptionType` contains
+ * `$metadata` property, it's also included in the returned type.
+ * @internal
+ */
+export type ExceptionOptionType<ExceptionType extends Error, BaseExceptionType extends Error> = Omit<
+  ExceptionType,
+  Exclude<keyof BaseExceptionType, "$metadata">
+>;
+
 export interface ServiceExceptionOptions extends SmithyException, MetadataBearer {
   message?: string;
 }