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<?php class myClass { protected $value; function setValue($value) : self { $this->value = $value; } function doubleValue() : self { $this->value*=2; } function getValue() : self { return $this->value; } } $calculator = new myClass(); $returnValue = $calculator->setValue(3) ->doubleValue() ->getValue(); echo $returnValue;
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: myClass::setValue(): Return value must be of type myClass, none returned in /in/7ha2r:10 Stack trace: #0 /in/7ha2r(25): myClass->setValue(3) #1 {main} thrown in /in/7ha2r on line 10
Process exited with code 255.

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