From 9a11e4f5081d6dff7f1587e636f39de4b8983753 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Mon, 11 Mar 2019 21:21:02 +0800
Subject: Fix some compile bugs.

---
 Timeline/ClientApp/src/app/utilities/language-untilities.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'Timeline/ClientApp/src/app/utilities')

diff --git a/Timeline/ClientApp/src/app/utilities/language-untilities.ts b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
index f898039a..be9df2dc 100644
--- a/Timeline/ClientApp/src/app/utilities/language-untilities.ts
+++ b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
@@ -2,8 +2,11 @@ export function nullIfUndefined<T>(value: T | undefined): T | null {
   return value === undefined ? null : value;
 }
 
-export function throwIfFalsy(value: any, name: string = '<unknown name>') {
-  if (!value) {
-    throw new Error(name + ' is falsy.');
+export function throwIfNullOrUndefined<T>(value: T | null | undefined,
+  lazyMessage: () => string = () => 'Value mustn\'t be falsy'): T | never {
+  if (value === null || value === undefined) {
+    throw new Error(lazyMessage());
+  } else {
+    return value;
   }
 }
-- 
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