rfc:gmp_number

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rfc:gmp_number [2013/12/30 23:37] – created yohgakirfc:gmp_number [2013/12/30 23:57] – yohgaki
Line 49: Line 49:
  
  
 +
 +===== References =====
 +
 +== Current empty() and is_scalar() behavior ==
 +
 +[yohgaki@dev php-src]$ ./php-bin -a
 +Interactive shell
 +
 +  php > $g = gmp_init(123);
 +  php > var_dump($v);
 +  object(GMP)#3 (1) {
 +    ["num"]=>
 +    string(1) "0"
 +  }
 +  php > $v = $g * 0;
 +  
 +  php > var_dump($v, empty($v), is_scalar($v));
 +  object(GMP)#4 (1) {
 +    ["num"]=>
 +    string(3) "0"
 +  }
 +  bool(false)
 +  bool(false)
 +
 +
 +== Current math function behavior ==
 +
 +GMP float is not supported.
 +  php > $f = 2.2;
 +  php > $gf = gmp_init($f);
 +  
 +  Warning: gmp_init(): Unable to convert variable to GMP - wrong type in php shell code on line 1
 +
 +max()/min()
 +  php > $g = gmp_init(123);
 +  php > var_dump($v);
 +  object(GMP)#4 (1) {
 +    ["num"]=>
 +    string(1) "0"
 +  }
 +  php > $g = gmp_init(5);
 +  php > var_dump(max(1,2,$g));
 +  object(GMP)#1 (1) {
 +    ["num"]=>
 +    string(1) "5"
 +  }
 +  php > var_dump(min(1,2,$g));
 +  int(1)
 +  php > var_dump(min($g, 6, 7));
 +  object(GMP)#1 (1) {
 +    ["num"]=>
 +    string(1) "5"
 +  }
 +
 +
 +== Current Ruby and PHP behavior ==
 +  [yohgaki@dev php-src]$ irb
 +  2.0.0p247 :001 > 10 / 3
 +   => 3 
 +  2.0.0p247 :002 > 10.0 / 3
 +   => 3.3333333333333335 
 +  2.0.0p247 :003 > 
 +
 +  [yohgaki@dev php-src]$ php -a
 +  Interactive shell
 +  
 +  php > $g = gmp_init('10');
 +  php > echo $g / 3;
 +  3
 +  
 +  php > echo 10 / 3;
 +  3.3333333333333
  
 ===== Backward Incompatible Changes ===== ===== Backward Incompatible Changes =====
Line 77: Line 149:
  
   * Ways to implement GMP object evaluation in empty(), is_scalar()   * Ways to implement GMP object evaluation in empty(), is_scalar()
 +    * Treat GMP object as special object
 +    * Implement scalar object
 +    * Implement autoboxing like feature
 +  * How GMP number should behave (Like PHP or Ruby?)
 +  * GMP float support API design
 +  * gmp_precision default value
  
 ===== Future Scope ===== ===== Future Scope =====
Line 100: Line 178:
  
   * https://wiki.php.net/rfc/operator_overloading_gmp   * https://wiki.php.net/rfc/operator_overloading_gmp
 +  * https://wiki.php.net/rfc/autoboxing
  
 ===== Rejected Features ===== ===== Rejected Features =====
rfc/gmp_number.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1

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