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<?php declare(strict_types=1); /** * @template TKey * @template TValue * @implements IteratorAggregate<TKey, TValue> */ final class RewindableGenerator implements IteratorAggregate { /** * @param callable(): Generator<TKey, TValue> $generatorFunction */ public function __construct(private $generatorFunction) {} public function getIterator(): Traversable { return ($this->generatorFunction)(); } } /** * @return Generator<int, int> */ function thousand(): Generator { for ($i = 0; $i < 1000; ++$i) { yield $i; } } $thousand = new RewindableGenerator(thousand(...)); foreach ($thousand as $i); foreach ($thousand as $i); foreach ($thousand as $i);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
2 jumps found. (Code = 78) Position 1 = 9, Position 2 = 10
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 10
2 jumps found. (Code = 77) Position 1 = 12, Position 2 = 14
Branch analysis from position: 12
2 jumps found. (Code = 78) Position 1 = 13, Position 2 = 14
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
Branch analysis from position: 14
2 jumps found. (Code = 77) Position 1 = 16, Position 2 = 18
Branch analysis from position: 16
2 jumps found. (Code = 78) Position 1 = 17, Position 2 = 18
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
Branch analysis from position: 14
Branch analysis from position: 10
filename:       /in/46Evq
function name:  (null)
number of ops:  20
compiled vars:  !0 = $thousand, !1 = $i
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   10     0  E >   DECLARE_CLASS                                                'rewindablegenerator'
   33     1        NEW                                                  $2      'RewindableGenerator'
          2        INIT_FCALL                                                   'thousand'
          3        CALLABLE_CONVERT                                     ~3      
          4        SEND_VAL_EX                                                  ~3
          5        DO_FCALL                                          0          
          6        ASSIGN                                                       !0, $2
   35     7      > FE_RESET_R                                           $6      !0, ->10
          8    > > FE_FETCH_R                                                   $6, !1, ->10
          9    > > JMP                                                          ->8
         10    >   FE_FREE                                                      $6
   36    11      > FE_RESET_R                                           $7      !0, ->14
         12    > > FE_FETCH_R                                                   $7, !1, ->14
         13    > > JMP                                                          ->12
         14    >   FE_FREE                                                      $7
   37    15      > FE_RESET_R                                           $8      !0, ->18
         16    > > FE_FETCH_R                                                   $8, !1, ->18
         17    > > JMP                                                          ->16
         18    >   FE_FREE                                                      $8
         19      > RETURN                                                       1

Function thousand:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
2 jumps found. (Code = 44) Position 1 = 7, Position 2 = 3
Branch analysis from position: 7
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 3
2 jumps found. (Code = 44) Position 1 = 7, Position 2 = 3
Branch analysis from position: 7
Branch analysis from position: 3
filename:       /in/46Evq
function name:  thousand
number of ops:  8
compiled vars:  !0 = $i
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   26     0  E >   GENERATOR_CREATE                                             
   28     1        ASSIGN                                                       !0, 0
          2      > JMP                                                          ->5
   29     3    >   YIELD                                                        !0
   28     4        PRE_INC                                                      !0
          5    >   IS_SMALLER                                                   !0, 1000
          6      > JMPNZ                                                        ~4, ->3
   31     7    > > GENERATOR_RETURN                                             

End of function thousand

Class RewindableGenerator:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/46Evq
function name:  __construct
number of ops:  4
compiled vars:  !0 = $generatorFunction
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   15     0  E >   RECV                                                 !0      
          1        ASSIGN_OBJ                                                   'generatorFunction'
          2        OP_DATA                                                      !0
          3      > RETURN                                                       null

End of function __construct

Function getiterator:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/46Evq
function name:  getIterator
number of ops:  7
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   19     0  E >   FETCH_OBJ_R                                          ~0      'generatorFunction'
          1        INIT_DYNAMIC_CALL                                            ~0
          2        DO_FCALL                                          0  $1      
          3        VERIFY_RETURN_TYPE                                           $1
          4      > RETURN                                                       $1
   20     5*       VERIFY_RETURN_TYPE                                           
          6*     > RETURN                                                       null

End of function getiterator

End of class RewindableGenerator.

Generated using Vulcan Logic Dumper, using php 8.5.0


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