rfc:pipe-operator-v2

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rfc:pipe-operator-v2 [2021/07/04 01:53] – Remove last PFA trace crellrfc:pipe-operator-v2 [2021/07/05 15:58] – References are no longer allowed crell
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 ===== Additional semantics ===== ===== Additional semantics =====
  
-Functions that accept their first parameter by reference are supported, and will behave exactly as if they were called in the normal "inside out" fashion.  However, unless they return a value as well they are not of much use.+Functions that accept their first parameter by reference are not allowed.  Functions that return by reference are not allowed.  As the whole point of pipes is to pass values along from one function to the next, references are of little value.
  
 When evaluating a pipe, the left-hand side is fully evaluated first, then the right-hand side, then the right-hand side is invoked using the left-hand side.  That is, evaluation is strictly left-to-right. When evaluating a pipe, the left-hand side is fully evaluated first, then the right-hand side, then the right-hand side is invoked using the left-hand side.  That is, evaluation is strictly left-to-right.
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   * Laravel includes a [[https://github.com/illuminate/pipeline|Illuminate/Pipeline]] package that has an [[https://agoalofalife.medium.com/pipeline-and-php-d9bb0a6370ca|even more cumbersome syntax]].   * Laravel includes a [[https://github.com/illuminate/pipeline|Illuminate/Pipeline]] package that has an [[https://agoalofalife.medium.com/pipeline-and-php-d9bb0a6370ca|even more cumbersome syntax]].
   * The [[https://github.com/azjezz/psl|PHP Standard Library]] (PSL) library includes a [[https://github.com/azjezz/psl/blob/1.8.x/src/Psl/Fun/pipe.php|pipe function]], though it is more of a function concatenation operation.   * The [[https://github.com/azjezz/psl|PHP Standard Library]] (PSL) library includes a [[https://github.com/azjezz/psl/blob/1.8.x/src/Psl/Fun/pipe.php|pipe function]], though it is more of a function concatenation operation.
 +  * [[https://github.com/sebastiaanluca/php-pipe-operator|Sebastiaan Luca]] has a pipe library that works through abuse of the ''%%__call%%'' method.  It only works for named functions, I believe, not for arbitrary callables.
   * Various blogs speak of "the Pipeline Pattern" ([[https://medium.com/@aaronweatherall/the-pipeline-pattern-for-fun-and-profit-9b5f43a98130|for example]])   * Various blogs speak of "the Pipeline Pattern" ([[https://medium.com/@aaronweatherall/the-pipeline-pattern-for-fun-and-profit-9b5f43a98130|for example]])
  
rfc/pipe-operator-v2.txt · Last modified: 2021/07/20 15:34 by crell

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