{"id":73,"date":"2021-12-03T09:51:48","date_gmt":"2021-12-03T00:51:48","guid":{"rendered":"https:\/\/www.b64.pw\/blog\/?p=73"},"modified":"2021-12-03T09:57:30","modified_gmt":"2021-12-03T00:57:30","slug":"php8-1%e3%81%ae%e6%96%b0%e6%a9%9f%e8%83%bd%e7%b4%b9%e4%bb%8b-readonly%e3%83%97%e3%83%ad%e3%83%91%e3%83%86%e3%82%a3","status":"publish","type":"post","link":"https:\/\/www.b64.pw\/blog\/?p=73","title":{"rendered":"PHP8.1\u306e\u65b0\u6a5f\u80fd\u7d39\u4ecb Readonly\u30d7\u30ed\u30d1\u30c6\u30a3"},"content":{"rendered":"\n<p>\u3053\u308c\u306f\u500b\u4eba\u7684\u306b\u306f\u4e00\u756a\u5f85\u3061\u671b\u3093\u3067\u305f\u6a5f\u80fd\u3002<br>\u3053\u308c\u3067Getter\u3092\u308f\u3056\u308f\u3056\u4f5c\u3089\u305a\u306b\u6e08\u3080\u306e\u3067\u975e\u5e38\u306b\u7c21\u6f54\u306b\u66f8\u3051\u308b\u3002<\/p>\n\n\n\n<p>\u7279\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u6570\u304c\u5897\u3048\u308b\u3068\u7169\u96d1\u3055\u304c\u3060\u3044\u3076\u7de9\u548c\u3055\u308c\u308b\u5370\u8c61\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Color{\r\n  public readonly int $r;\r\n  public readonly int $g;\r\n  public readonly int $b;\r\n  public readonly int $a;\r\n  public function __construct($r,$g,$b,$a){\r\n    $this->r = $r;\r\n    $this->g = $g;\r\n    $this->b = $b;\r\n    $this->a = $a;\r\n  }\r\n}<\/code><\/pre>\n\n\n\n<p>\u305f\u3060\u3057readonly\u5c5e\u6027\u3092\u3064\u3051\u308b\u3068\u304d\u306f\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u578b\u3092\u6307\u5b9a\u3057\u306a\u3044\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3002<\/p>\n\n\n<p>public readonly $r;\/\/ Fatal error: Readonly property Color::$r must have type<\/p>\n\n\n\n<p>\u3061\u306a\u307f\u306breadonly\u3092\u4f7f\u308f\u306a\u3044\u3067\u66f8\u304f\u3068\u3053\u3046\u306a\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class ColorClassic{\r\n  private int $r;\r\n  private int $g;\r\n  private int $b;\r\n  private int $a;\r\n  public function getR():int{\r\n    return $this->r;\r\n  }\r\n  public function getG():int{\r\n    return $this->g;\r\n  }\r\n  public function getB():int{\r\n    return $this->b;\r\n  }\r\n  public function getA():int{\r\n    return $this->a;\r\n  }\r\n  public function __construct($r,$g,$b,$a){\r\n    $this->r = $r;\r\n    $this->g = $g;\r\n    $this->b = $b;\r\n    $this->a = $a;\r\n  }\r\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u308c\u306f\u500b\u4eba\u7684\u306b\u306f\u4e00\u756a\u5f85\u3061\u671b\u3093\u3067\u305f\u6a5f\u80fd\u3002\u3053\u308c\u3067Getter\u3092\u308f &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73"}],"collection":[{"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=73"}],"version-history":[{"count":3,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":77,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions\/77"}],"wp:attachment":[{"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.b64.pw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}