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<?php declare(strict_types=1); namespace Dshafik; class Struct { // Because gettype() and ReflectionType->__toString() are inconsistent /** * @var array Type mappings */ private $__typeMap = [ 'int' => 'integer', 'bool' => 'boolean', 'float' => 'double', ]; /** * @var array Reflection data */ private $__reflection = []; /** * @var array The struct values */ protected $__values = []; public function __construct() { $this->introspect(); $this->hoist(func_get_args()); } public function __get($what) { return $this->__values[$what]; } public function __set($what, $value) { if (($type = gettype($value)) === $this->__reflection[$what]) { return $this->__values[$what] = $value; } else { throw new \TypeError("Key '$what' must be of type {$this->__reflection[$what]}, $type given."); } } final protected function introspect() { if ($this->__reflection) { return; } $class = new \ReflectionObject($this); $constructor = $class->getConstructor(); foreach ($constructor->getParameters() as $arg) { $type = (string) $arg->getType(); $this->__reflection[$arg->name] = $this->__typeMap[$type] ?? $type; } } final protected function hoist($args) { $this->introspect(); $i = 0; foreach ($this->__reflection as $key => $type) { $this->__set($key, $args[$i]); $i++; } } } // With strict types, will throw a TypeError, or coerce otherwise on mismatch $struct = new class(1, "Hello") extends Struct { public function __construct(int $foo, string $bar) { $this->hoist(func_get_args()); } }; var_dump($struct); // Works $struct->foo = 2; var_dump($struct); // Will throw a TypeError $struct->foo = 'World';
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(Dshafik\Struct@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(1) ["bar"]=> string(5) "Hello" } } object(Dshafik\Struct@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(2) ["bar"]=> string(5) "Hello" } } Fatal error: Uncaught TypeError: Key 'foo' must be of type integer, string given. in /in/dC8Lu:42 Stack trace: #0 /in/dC8Lu(86): Dshafik\Struct->__set('foo', 'World') #1 {main} thrown in /in/dC8Lu on line 42
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: Function ReflectionType::__toString() is deprecated in /in/dC8Lu on line 55 Deprecated: Function ReflectionType::__toString() is deprecated in /in/dC8Lu on line 55 object(class@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(1) ["bar"]=> string(5) "Hello" } } object(class@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(2) ["bar"]=> string(5) "Hello" } } Fatal error: Uncaught TypeError: Key 'foo' must be of type integer, string given. in /in/dC8Lu:42 Stack trace: #0 /in/dC8Lu(86): Dshafik\Struct->__set('foo', 'World') #1 {main} thrown in /in/dC8Lu on line 42
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
object(class@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(1) ["bar"]=> string(5) "Hello" } } object(class@anonymous)#1 (3) { ["__typeMap":"Dshafik\Struct":private]=> array(3) { ["int"]=> string(7) "integer" ["bool"]=> string(7) "boolean" ["float"]=> string(6) "double" } ["__reflection":"Dshafik\Struct":private]=> array(2) { ["foo"]=> string(7) "integer" ["bar"]=> string(6) "string" } ["__values":protected]=> array(2) { ["foo"]=> int(2) ["bar"]=> string(5) "Hello" } } Fatal error: Uncaught TypeError: Key 'foo' must be of type integer, string given. in /in/dC8Lu:42 Stack trace: #0 /in/dC8Lu(86): Dshafik\Struct->__set('foo', 'World') #1 {main} thrown in /in/dC8Lu on line 42
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Unsupported declare 'strict_types' in /in/dC8Lu on line 2 Parse error: syntax error, unexpected '?' in /in/dC8Lu on line 56
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Warning: Unsupported declare 'strict_types' in /in/dC8Lu on line 2 Parse error: syntax error, unexpected '[' in /in/dC8Lu on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/dC8Lu on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/dC8Lu on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/dC8Lu on line 3
Process exited with code 255.
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