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Option型 #45

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marihachi opened this issue Feb 4, 2023 · 0 comments
Open

Option型 #45

marihachi opened this issue Feb 4, 2023 · 0 comments
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marihachi commented Feb 4, 2023 •
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構文案

var x: Option<number> = null;

// cast interfaces
var player: Char = Char { };
var y: Option<Drawable & Position> = player;
y = null;

nullリテラルとOption<T>型の追加。
Optionを明示しない限りはnull値を許容しない。
Option<T>とするのでGeneric型(インターフェース)もサポートする方が自然？
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