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<?php function is_even(int $n): bool { $fn = fn(int $nr, bool $not): bool => $nr === 0 ? !$not : $fn(($nr < 0 ? abs($nr) : $nr) - 1, !$not); return $fn($n); } for($i = -5; $i <= 12; $i++) { printf('is %d even? %s.%s', $i, is_even($i) ? 'yes': 'no', "\n"); }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed in /in/8F178 on line 6 and exactly 2 expected in /in/8F178:4 Stack trace: #0 /in/8F178(6): {closure}(-5) #1 /in/8F178(10): is_even(-5) #2 {main} thrown in /in/8F178 on line 4
Process exited with code 255.

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