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syuilo 2019-04-13 14:45:51 +09:00
parent 084135141f
commit 78414dee29
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src/prelude/ensure.ts
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@ -1,3 +1,6 @@
/**
* 値が null または undefined の場合はエラーを発生させ、そうでない場合は値をそのまま返します
*/
export function ensure<T>(x: T): NonNullable<T> { export function ensure<T>(x: T): NonNullable<T> {
if (x == null) { if (x == null) {
throw 'ぬるぽ'; throw 'ぬるぽ';