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<?php class X {} class Y extends X {} interface InterfaceA { function beMyself(X $a);//: self; } class ClassA implements InterfaceA { function beMyself(Y $a) //: self { return $this; } } var_dump((new ClassA)->beMyself());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/6sk1i
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E >   DECLARE_CLASS                                            'classa'
   20     1        INIT_FCALL                                               'var_dump'
          2        NEW                                              $0      'ClassA'
          3        DO_FCALL                                      0          
          4        INIT_METHOD_CALL                                         $0, 'beMyself'
          5        DO_FCALL                                      0  $2      
          6        SEND_VAR                                                 $2
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Class X: [no user functions]
Class Y: [no user functions]
Class InterfaceA:
Function bemyself:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/6sk1i
function name:  beMyself
number of ops:  2
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E >   RECV                                             !0      
          1      > RETURN                                                   null

End of function bemyself

End of class InterfaceA.

Class ClassA:
Function bemyself:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/6sk1i
function name:  beMyself
number of ops:  4
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   RECV                                             !0      
   16     1        FETCH_THIS                                       ~1      
          2      > RETURN                                                   ~1
   17     3*     > RETURN                                                   null

End of function bemyself

End of class ClassA.

Generated using Vulcan Logic Dumper, using php 8.0.0


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