Re: Type variants
| From: | Michael Vostrikov | Date: | Sat, 11 Mar 2017 16:24:13 +0000 |
| Subject: | Re: Type variants | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-98485@lists.php.net to get a copy of this message | ||
> 'Order does not match OrderForCheckout. Reason: ...'.
Sorry, this is text for second example) I missed this moment. But I think
the idea is clear.
For manual call of __match() type casting can be used:
$orderForCheckout = (OrderForCheckout)$order;
Also this feature can be used for checking enum values or intervals.
class Value
{
public $value;
public function __construct($value)
{
$this->value = $value;
}
}
class State variant of Value
{
const ACTIVE = 1;
const INACTIVE = 2;
public function __match()
{
return in_array($this->value, [self::ACTIVE, self::INACTIVE]);
}
}
function setState(State $s)
{
...
}
setState(new State(3));
In constructions like "new State($value)" __match() can be called after
__construct().
If to add a possibility to use data types, class Value will not be needed:
class State variant of integer
{
...
public function __match()
{
return in_array($this, [self::ACTIVE, self::INACTIVE]);
}
}
setState(3);