48     public function ceil(array $arg): array  argument
50         $value = Asserts::assertNumber($arg);
51         return ['number', ceil($value), $arg[2]];
60     public function floor(array $arg): array  argument
62         $value = Asserts::assertNumber($arg);
63         return ['number', floor($value), $arg[2]];
72     public function percentage(array $arg): array  argument
74         $num = Asserts::assertNumber($arg);
84     public function round(array $arg): array  argument
86         if ($arg[0] != 'list') {
87             $value = Asserts::assertNumber($arg);
88             return ['number', round($value), $arg[2]];
90             $value = Asserts::assertNumber($arg[2][0]);
91             $precision = Asserts::assertNumber($arg[2][1]);
92             return ['number', round($value, $precision), $arg[2][0][2]];