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【言語別】ジェネリクスの型パラメータを書く場所

Last updated at Posted at 2020-05-14

言語によって型パラメータを書く場所が異なり混乱するためまとめてみた。
(編集リクエストをいただければ他の言語も追加します。)

Java

型定義

class MyType<T> { }

変数の型指定

MyType<T> myVariable

関数定義

public static <T> void myFunction() { }

関数呼び出し

this.<String>myFunction()

Kotlin

型定義

class MyType<T> { }

変数の型指定

val myVariable: MyType<String>

関数定義

fun <T> myFunction() { }

関数呼び出し

myFunction<String>()

TypeScript

型定義

class MyType<T> { }

変数の型指定

const myVariable: MyType<string>

関数定義

function myFunction<T>(): void { }

関数呼び出し

myFunction<string>()
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