rfc:keywords_as_identifiers

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rfc:keywords_as_identifiers [2013/10/20 10:32] – + perf bwoebirfc:keywords_as_identifiers [2013/10/22 10:31] – + notice on BC bwoebi
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   * Date: 2013-09-14   * Date: 2013-09-14
   * Author: Bob Weinand, bobwei9@hotmail.com   * Author: Bob Weinand, bobwei9@hotmail.com
-  * Status: Under Discussion+  * Status: Vote
   * First Published at: http://wiki.php.net/rfc/keywords_as_identifiers   * First Published at: http://wiki.php.net/rfc/keywords_as_identifiers
  
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 This RFC aims to remove some restrictions which are due to the fact that keywords are not included in T_STRING (especially for class const, method and class names). This RFC aims to remove some restrictions which are due to the fact that keywords are not included in T_STRING (especially for class const, method and class names).
 +
 +This especially could be useful to preserve more BC compatibility whenever new keywords are introduced. 
  
 ===== What is now possible ===== ===== What is now possible =====
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 An example what is possible with this patch: An example what is possible with this patch:
 <code php> <code php>
-namespace Test {+namespace Class {
     class List {     class List {
         const default = 0;         const default = 0;
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 namespace { namespace {
-    \Test\List::echo((new Test\List)->new(array(1)));+    \Class\List::echo((new Class\List)->new(array(1)));
 } }
 </code> </code>
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 ===== Impact on performance ===== ===== Impact on performance =====
  
-There is a slight decrease in performance of up to 10% in worst case. Actually, when used with opcache, any impact shouldn't be noticeable.+There is a slight decrease in //compilation performance// of up to 10% in worst case. So, actually, when used with opcache (execution only), any impact shouldn't be noticeable.
  
 For that benchmark I used an 1.5 megabyte big file wrapped in an //if (false)// (so that nothing is executed): https://raw.github.com/nikic/PHP-Parser/master/lib/PHPParser/Parser.php For that benchmark I used an 1.5 megabyte big file wrapped in an //if (false)// (so that nothing is executed): https://raw.github.com/nikic/PHP-Parser/master/lib/PHPParser/Parser.php
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   * Initially the patch contained also some support for functions and constants which was removed later due to some resulting syntactic inconsistencies   * Initially the patch contained also some support for functions and constants which was removed later due to some resulting syntactic inconsistencies
  
 +===== Vote =====
 +
 +<doodle title="Should the extended keyword support patch be merged into master?" auth="bwoebi" voteType="single" closed="false">
 +   * Yes
 +   * No
 +</doodle>
 +
 +Deadline is Monday, 28th october 2013.
 ===== Versions ===== ===== Versions =====
   * 1.0: Initial proposal (16.9.2013)   * 1.0: Initial proposal (16.9.2013)
   * 1.1: Added some more examples (18.9.2013)   * 1.1: Added some more examples (18.9.2013)
   * 1.2: Removed some restrictions (now all keywords are permitted except the ones which would conflict with the existing language) (16.10.2013)   * 1.2: Removed some restrictions (now all keywords are permitted except the ones which would conflict with the existing language) (16.10.2013)
rfc/keywords_as_identifiers.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1

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