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<!--info-header-start--><h1>If </h1><blockquote><p>by Pavel Glushkov <a href="https://github.com/pashutk" target="_blank">@pashutk</a></p></blockquote><p><a href="https://tsch.js.org/268/play/ko" target="_blank"></a> &nbsp;&nbsp;&nbsp;<a href="./README.md" target="_blank"></a> <a href="./README.zh-CN.md" target="_blank"></a> <a href="./README.ja.md" target="_blank"></a> </p><!--info-header-end-->

조건 C, 참일 때 반환하는 타입 T, 거짓일 때 반환하는 타입 F를 받는 타입 If를 구현하세요. C는 true 또는 false이고, T와 F는 아무 타입입니다.

예시:

ts
type A = If<true, 'a', 'b'>  // expected to be 'a'
type B = If<false, 'a', 'b'> // expected to be 'b'
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