Re: [RFC] Pipe Operator (again)

From:	Tim Düsterhus	Date:	Wed, 26 Feb 2025 20:01:28 +0000
Subject:	Re: [RFC] Pipe Operator (again)
References:	1 2 3 4	Groups:	php.internals
Request:	Send a blank email to internals+get-126515@lists.php.net to get a copy of this message

Hi On 2/8/25 12:36, Tim Düsterhus wrote:

If the expression on the right side that produces a Closure has side effects (output, DB interaction, etc.), then the order in which those side effects happen may change with the different restructuring.
That is a good point. I see you added a precedence section, but this does not fully explain the order of operations in face of side-effects and more generally with regard to “short-circuiting” behavior. An OPcode dump would explain that. Specifically for:
      function foo()     { echo __FUNCTION__, PHP_EOL; return 1; }
      function bar()     { echo __FUNCTION__, PHP_EOL; return false; }
      function baz($in)  { echo __FUNCTION__, PHP_EOL; return $in; }
      function quux($in) { echo __FUNCTION__, PHP_EOL; return $in; }
      foo()
          |> (bar() ? baz(...) : quux(...))
          |> var_dump(...);
What will the output be?

This is unresolved. Best regards Tim Düsterhus