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Bug #70833 Scalar type hinting works with bool but not with boolean
Submitted: 2015-11-02 09:24 UTC Modified: 2015-11-26 19:58 UTC
Votes:2
Avg. Score:4.0 ± 1.0
Reproduced:1 of 2 (50.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: sam at rmcreative dot ru Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 7.0.0RC6 OS: Any
Private report: No CVE-ID: None
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 [2015-11-02 09:24 UTC] sam at rmcreative dot ru 
Description:
------------
You can cast to boolean using either (bool)$var or (boolean)$var. In scalar type hints currently only bool could be used which is inconsistent.

Test script:
---------------
<?php
$boolean = 1;
$boolean = (boolean) $boolean;


function dump_boolean(boolean $var)
{
    var_dump($var);
}

dump_boolean($boolean);

// https://3v4l.org/Cdtoe

Expected result:
----------------
I'd expect both boolean and bool work as scalar type hint because both work well for type casting.

Actual result:
--------------
https://3v4l.org/egb59

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 [2015-11-02 10:03 UTC] php at developerjack dot com 
My understanding is only one scalar type should exist.

From the RFC:
https://wiki.php.net/rfc/scalar_type_hints_v5

Heading: "Type Aliases Should Not Be Supported"
> This proposal takes the stance that there should be one obvious type. Therefore, no aliases are supported.

I cannot remember a separate RFC to reserve boolean (or integer for that matter) for use.
 [2015-11-26 19:41 UTC] webmaster at tubo-world dot de 
As stated, the aliases are not meant to be supported according to the RFC. This can be closed.
 [2015-11-26 19:58 UTC] nikic@php.net
-Status: Open +Status: Not a bug
 [2015-11-26 19:58 UTC] nikic@php.net 
As per the previous comments, not supporting aliases is deliberate, so closing as not a bug.
 
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