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Message-ID: <27d1f7d2-da99-475f-b2f6-d07efba76b68@scriptfusion.com>
Date: Sun, 25 Aug 2024 16:42:56 +0100
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Subject: Re: [PHP-DEV] [RFC] Default expression
To: John Coggeshall <john@coggeshall.org>
Cc: "internals@lists.php.net" <internals@lists.php.net>
References: <0c8ed5d6-5507-4c41-8d7f-05d14ba8aa4c@scriptfusion.com>
 <E7303985-17AE-461E-94F1-A14B24DC07A7@getmailspring.com>
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From: bilge@scriptfusion.com (Bilge)

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On 25/08/2024 15:04, John Coggeshall wrote:
> Other thoughts here are what happens when |default| resolves to an 
> object or enumeration or something complex? Your original example had 
> |CuteTheme| , so can you call a method of |default| ?? I could 
> entirely see someone doing something like this for example:
>
> enum Foo:string {
>     // cases
>
>     public function buildSomeValidBasedOnCase(): int { // ... }
> }
>
> F(MyClass::makeBasedOnValue(default->buildSomeValidBasedOnCase()))

As you have written it, no, you will get a parser error: Parse error: 
syntax error, unexpected token "->", expecting ")"

However, you can wrap the `default` in parens as in the following example:

class C {
     function F() {
         echo 'lol';
     }
}

function G($V = new C) {}

G((default)->F()); // lol

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    <div class="moz-cite-prefix">On 25/08/2024 15:04, John Coggeshall
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:E7303985-17AE-461E-94F1-A14B24DC07A7@getmailspring.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
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        <div>Other thoughts here are what happens when <code>default</code> 
          resolves to an object or enumeration or something complex?
          Your original example had <code>CuteTheme</code> , so can you
          call a method of <code>default</code> ?? I could entirely see
          someone doing something like this for example:</div>
        <br>
        <div>enum Foo<span data-emoji-typing="true">:string</span> {</div>
        <div>    // cases</div>
        <br>
        <div>    public function buildSomeValidBasedOnCase(): int { //
          ... }</div>
        <div>}</div>
        <br>
        <div>F(MyClass:<span data-emoji-typing="true">:makeBasedO</span>nValue(default-&gt;buildSomeValidBasedOnCase()))</div>
      </div>
    </blockquote>
    <p>As you have written it, no, you will get a parser error: Parse
      error: syntax error, unexpected token "-&gt;", expecting ")"<br>
      <br>
      However, you can wrap the `default` in parens as in the following
      example:<br>
      <br>
      class C {<br>
          function F() {<br>
              echo 'lol';<br>
          }<br>
      }<br>
      <br>
      function G($V = new C) {}<br>
      <br>
      G((default)-&gt;F()); // lol<br>
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