rfc:short-match

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rfc:short-match [2020/12/14 00:18] – crellrfc:short-match [2022/04/17 19:06] (current) – Move to inactive ilutov
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   * Date: 2020-12-13   * Date: 2020-12-13
   * Author: Larry Garfield (larry@garfieldtech.com)   * Author: Larry Garfield (larry@garfieldtech.com)
-  * Status: Draft+  * Status: Inactive
   * First Published at: http://wiki.php.net/rfc/short-match   * First Published at: http://wiki.php.net/rfc/short-match
  
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 ===== Proposal ===== ===== Proposal =====
  
-This RFC makes only one change.  In a ''match()'' expression, if the match subject is not provided, it defaults to boolean ''true''.+This RFC would make only one change.  In a ''match()'' expression, if the match subject were not provided, it would default to boolean ''true''.
  
 That is, this PHP 8.0 syntax: That is, this PHP 8.0 syntax:
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 </code> </code>
  
-Can, with this RFC, be shortened to:+could, with this RFC, be shortened to:
  
 <code php> <code php>
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 </code> </code>
  
 +A prime use case for such match statements is for basic pattern matching within a function:
 +
 +<code php>
 +function getNumberKind(int $num) {
 +  return match {
 +    $num > 0 => NumberKind::POSITIVE,
 +    $num == 0 => NumberKind::ZERO,
 +    $num < 0 => NumberKind::NEGATIVE,
 +  };
 +}
 +</code>
 +
 +That would be even more compact if combined with the also-proposed [[rfc:short-functions|Short Functions]] RFC.  Or, if used with a short-lambda today:
 +
 +<code php>
 +$getNumber = fn(int $num) => match {
 +    $num < 0 => NumberKind::NEGATIVE,
 +    $num == 0 => NumberKind::ZERO,
 +    $num > 0 => NumberKind::POSITIVE,
 +};
 +</code>
 +
 +The net result is to simplify both the writing and reading of "functions as expressions" rather than "functions as subroutines."
  
 ===== Backward Incompatible Changes ===== ===== Backward Incompatible Changes =====
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 ===== Proposed Voting Choices ===== ===== Proposed Voting Choices =====
  
-This is a simple up-or-down vote, requiring 2/3 to pass.+Accept this RFC as proposed. 2/3 required for passage.
  
 ===== Patches and Tests ===== ===== Patches and Tests =====
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   * [[rfc:match_expression|PHP RFC: Match expression]]   * [[rfc:match_expression|PHP RFC: Match expression]]
   * [[rfc:match_expression_v2|PHP RFC: Match expression v2]]   * [[rfc:match_expression_v2|PHP RFC: Match expression v2]]
 +  * [[rfc:short-functions|PHP RFC: Short Functions]]
rfc/short-match.1607905100.txt.gz · Last modified: 2020/12/14 00:18 by crell

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