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<?php $sum = function($l):integer { return function($r) use ($l) { return $l + $r; }; }; echo $sum(4)(2);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: "integer" will be interpreted as a class name. Did you mean "int"? Write "\integer" to suppress this warning in /in/ZvT5s on line 2 Fatal error: Uncaught TypeError: {closure}(): Return value must be of type integer, Closure returned in /in/ZvT5s:5 Stack trace: #0 /in/ZvT5s(9): {closure}(4) #1 {main} thrown in /in/ZvT5s on line 5
Process exited with code 255.

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