三項演算子で throw したい

TL;DR

code:throw-in-expression.js

expression ? truthy : (() => { throw new Error() })()

ことの始まり

https://tweet-card.now.sh/1397838380445028353.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397838380445028353

https://tweet-card.now.sh/1397839508930842626.png?lang=en&theme=dark&scale=1 https://twitter.com/rokoucha/status/1397839508930842626

https://tweet-card.now.sh/1397840729246818310.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397840729246818310

https://tweet-card.now.sh/1397841138678059012.png?lang=en&theme=dark&scale=1 https://twitter.com/rokoucha/status/1397841138678059012

検証しました

code:throw-in-expression.ts

function hoge(piyo: string|number): void {

const puni: number = typeof piyo === 'string' ? piyo.length : (()=>{throw new Error('Invalid types')})();

const isPiyoString: string = piyo

}

普通に守ってくれた

https://tweet-card.now.sh/1397845962274394118.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397845962274394118

いいはなし。

ちなみに

https://tweet-card.now.sh/1397839234585677825.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397839234585677825

https://tweet-card.now.sh/1397839493026127874.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397839493026127874

https://tweet-card.now.sh/1397840469221011461.png?lang=en&theme=dark&scale=1 https://twitter.com/dll7/status/1397840469221011461

まあ確かにどこまで式にするねんという感じはする