rfc:fix_up_bcmath_number_class

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rfc:fix_up_bcmath_number_class [2024/07/10 06:26] – sakirfc:fix_up_bcmath_number_class [2024/09/04 02:15] (current) – saki
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   * Date: 2024-06-30   * Date: 2024-06-30
   * Author: Saki Takamachi (saki@php.net)   * Author: Saki Takamachi (saki@php.net)
-  * Status: Under Discussion+  * Status: Implemented
   * First Published at: https://wiki.php.net/rfc/fix_up_bcmath_number_class   * First Published at: https://wiki.php.net/rfc/fix_up_bcmath_number_class
  
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 This RFC makes several corrections and changes to the <php>BcMath\Number</php> class and proposes to override the first RFC. This RFC makes several corrections and changes to the <php>BcMath\Number</php> class and proposes to override the first RFC.
  
-Also proposes that when cast a GMP object to bool, change it so that <php>0</php> is <php>false</php> and everything else is <php>true</php>, like an int.+It also proposes that when a GMP object is cast to bool, change it so that <php>0</php> is <php>false</php> and everything else is <php>true</php>, like an int.
  
 Details of the proposal regarding BCMath are as follows: Details of the proposal regarding BCMath are as follows:
   - Casting a Number object to bool makes it <php>false</php> if it is <php>0</php> and <php>true</php> otherwise.   - Casting a Number object to bool makes it <php>false</php> if it is <php>0</php> and <php>true</php> otherwise.
-  - Of the six comparison methods <php>comp()</php>, <php>eq()</php>, <php>gt()</php>, <php>gte()</php>, <php>lt()</php>, <php>lte()</php>, remove five except <php>comp()</php>. Then rename the <php>comp()</php> method to <php>compare()</php> method. +  - Of the six comparison methods <php>comp()</php>, <php>eq()</php>, <php>gt()</php>, <php>gte()</php>, <php>lt()</php>, <php>lte()</php>, remove all except <php>comp()</php>. Then rename the <php>comp()</php> method to <php>compare()</php>. 
-  - Remove format method.+  - Remove <php>format()</php> method.
   - Remove rounding in calculations.   - Remove rounding in calculations.
   - Make it serializable.   - Make it serializable.
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 === More information about comparison methods === === More information about comparison methods ===
-In fact, only need the <php>comp()</php> method to fulfill the functionality of the other five methods.+In fact, only the <php>comp()</php> method is needed to fulfill the functionality of the other five methods.
  
-Adding methods later is easy, but removing them always involves a BC Break.  Providing 6 methods from the start is obviously overkill, so will only provide <php>comp()</php>.+Adding methods later is easy, but removing them always involves a BC Break.  Providing 6 methods from the start is obviously overkill, so we will only provide <php>comp()</php>.
  
-By the way, the reason <php>comp()</php> is needed, and why comparison operators are underpowered, is to specify the scale to use for the comparison. +By the way, the reason <php>comp()</php> is needed, and why comparison operators are underpowered, is to specify the scale to use for the comparison.
  
-Then rename the <php>comp()</php> method to <php>compare()</php> method.+Currently, there is no other expression for comparison in PHP called "comp". The expression "cmp" is mainly used for functions, and the expression "compare" is used for class methods.
  
 e.g. e.g.
 +https://www.php.net/manual/ja/splpriorityqueue.compare.php
 +https://www.php.net/manual/ja/collator.compare.php
 +
 +Therefore, follow these conventions and rename <php>comp()</php> to <php>compare()</php>.
 +
 <PHP> <PHP>
 public function compare(Number|string|int $num, ?int $scale = null): int {} public function compare(Number|string|int $num, ?int $scale = null): int {}
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 </PHP> </PHP>
  
-Based on the idea that shouldn't provide an API that looks "rich" from the get-go, I suggest removing all of these roundings.+Based on the idea that we shouldn't provide an API that looks "rich" from the get-go, I suggest removing all of these roundings.
  
 In other words, the rounding mode during calculations will be fixed at truncation, and the user will not be able to change it. This applies to both operator and method calculations. In other words, the rounding mode during calculations will be fixed at truncation, and the user will not be able to change it. This applies to both operator and method calculations.
  
-If the user wants to do rounding, should use the <php>round()</php> method.+If the user wants to do rounding, the <php>round()</php> method should be used.
  
 ===  Make it serializable === ===  Make it serializable ===
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 BCMath: None. BCMath: None.
  
-GMP: Code like <php>if ($gmp) {}</php> will behave differently. However, due to the nature of GMP, such codes are likely to be quite rare.+GMP: Code like <php>if ($gmp) {}</php> will behave differently. However, due to the nature of GMP, such code is likely to be quite rare.
  
 ===== Proposed PHP Version(s) ===== ===== Proposed PHP Version(s) =====
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 These are not second-round votes, so each requires a two-thirds majority vote to pass. These are not second-round votes, so each requires a two-thirds majority vote to pass.
 +
 +Voting ends on 2024-07-30 00:00:00 UTC.
 +
 +<doodle title="Fix up BCMath Number Class" auth="Saki Takamachi" voteType="single" closed="false" closeon="2024-07-30T00:00:00Z">
 +   * Yes
 +   * No
 +</doodle>
 +----
 +<doodle title="Change GMP bool cast behavior" auth="Saki Takamachi" voteType="single" closed="false" closeon="2024-07-30T00:00:00Z">
 +   * Yes
 +   * No
 +</doodle>
  
 ===== Patches and Tests ===== ===== Patches and Tests =====
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 ===== Implementation ===== ===== Implementation =====
-None.+https://github.com/php/php-src/pull/13741 
 +https://github.com/php/php-src/pull/15151
  
 ===== References ===== ===== References =====
rfc/fix_up_bcmath_number_class.1720592789.txt.gz · Last modified: 2024/07/10 06:26 by saki

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