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変性の説明と型定義の対応を修正しました。 #1138

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Merged
suin merged 1 commit into from
Aug 7, 2026
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変性の説明と型定義の対応を修正しました。 #1138

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2 changes: 1 addition & 1 deletion docs/reference/generics/variance.md
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Expand Up @@ -33,7 +33,7 @@ TypeScriptでは、型の互換性を判定する際に変性(variance)という
type BivariantFunction<I, O> = (arg: I) => O;
```

ここで引数`I`を共変にした`CovariantFunction<in I, O>`と戻り値`O`を反変にした`ContravariantFunction<I, out O>`、引数も戻り値も不変にした`InvariantFunction<in out I, in out O>`を定義します。するとそれらは次のように定義されます。
ここで戻り値`O`を共変にした`CovariantFunction<I, out O>`と引数`I`を反変にした`ContravariantFunction<in I, O>`、引数も戻り値も不変にした`InvariantFunction<in out I, in out O>`を定義します。するとそれらは次のように定義されます。

```ts twoslash
type BivariantFunction<I, O> = (arg: I) => O;
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