no way to compare when less than two revisions

Differences

This shows you the differences between two versions of the page.

@@ Line 1: / Line 1: @@
+====== PHP RFC: Normalize increment and decrement operators ======
+  * Version: 0.1
+  * Date: 2013-12-19
+  * Author: Tjerk Meesters (datibbaw)
+  * Status: Draft
+  * First Published at: https://wiki.php.net/rfc/normalize_inc_dec
+===== Introduction =====
+The current behaviour of increment and decrement operators is not very intuitive:
+<code php>
+// booleans
+$a = false; ++$a; // bool(false)
+$a = true; --$a; // bool(true)
+// null values
+$a = null; --$a; // null
+$a = null; ++$a; // int(1)
+// empty strings
+$a = ''; ++$a; // string(1) "1"
+// non-numeric strings
+$a = '12d9';
+++$a; // string(4) "12e0"
+++$a; // float(13)
+</code>
+===== Proposal =====
+The proposal is either:
+  - Treat boolean and null types as a restricted type value and deprecate alphanumeric increment.
+  - Treat boolean and null types as an integer value and deprecate alphanumeric increment.
+  - No changes.
+==== Option 1: Restricted type values ====
+<code php>
+// booleans
+$a = false;
+++$a; // bool(true)
+++$a; // bool(true)
+$a = true;
+--$a; // bool(false)
+--$a; // bool(false)
+// null values
+$a = null; --$a; // null
+$a = null; ++$a; // null
+// empty strings
+$a = ''; ++$a; // int(1)
+</code>
+==== Option 2: Integer values ====
+<code php>
+// booleans
+$a = false;
+++$a; // bool(true)
+++$a; // int(2)
+$a = true;
+--$a; // bool(false)
+--$a; // int(-1)
+// null values
+$a = null; --$a; // int(-1)
+$a = null; ++$a; // int(1)
+</code>
+==== Deprecating alphanumeric string increment ====
+<code php>
+// non-numeric strings
+$a = '12d9';
+++$a; // string(4) "12e0" + Notice: String increment is deprecated, use str_inc() instead in php shell code on line 1
+++$a; // float(13)
+</code>
+Additionally, it makes two new string functions available:
+  * ''str_inc($str)'' - to perform the current string increments.
+  * ''str_dec($str)'' - the string decrement.
+===== Backward Incompatible Changes =====
+With "option 1" the null value no longer increments to 1; this may lead to problems in for-loops with null values as the start argument.
+===== Proposed PHP Version(s) =====
+**Next 5.x**
+Introduce a notice for the current string increment use case. This will help developers spot their usage more easily.
+**Next major**
+Removal of string increment using ++ and --.
+===== Open Issues =====
+None.
+===== Unaffected PHP Functionality =====
+The changes do not affect the following data types:
+  * ''array''
+  * ''int''
+  * ''float''
+  * ''object''
+  * ''resource''
+===== Proposed Voting Choices =====
+Yay or nay.
+===== Patches and Tests =====
+Coming soon ...
+===== Implementation =====
+N/A
+===== References =====
+[[https://github.com/php/php-src/pull/547|Pull Request]]
+The competing proposal:
+[[alpanumeric_decrement|Alphanumeric Decrement]]
+===== Rejected Features =====
+Keep this updated with features that were discussed on the mail lists.

Differences

Page Tools