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<?php interface X { function foo(); } class Y implements X{ function foo(): iterable { return []; } }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1d7CD
function name:  (null)
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   DECLARE_CLASS                                            'y'
   10     1      > RETURN                                                   1

Class X:
Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1d7CD
function name:  foo
number of ops:  1
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E > > RETURN                                                   null

End of function foo

End of class X.

Class Y:
Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1d7CD
function name:  foo
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E > > RETURN                                                   <array>
    9     1*       VERIFY_RETURN_TYPE                                       
          2*     > RETURN                                                   null

End of function foo

End of class Y.

Generated using Vulcan Logic Dumper, using php 8.0.0


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