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Re: PHP7 Stack Trace Mess

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On 25/06/15 15:48, Christoph M. Becker wrote:

> It is the only way to let the user (opposed to library developers)
> decide whether weak or strict type checking should be applied.

Shouldn't the mere presence (or absence) of scalar type hints in a 
function declaration serve this purpose? If you absolutely want weak 
typing, you simply don't use type hints (nor strict libraries).

> Well, you'll want to consider the background.  "Everybody" wanted scalar
> type hints, but no broad consensus could be achieved regarding the
> semantics (strict vs. weak).

To me, "type hint" implies "strict". If I say "int", I mean "int" and 
not "string containing a representation of an integer".

> Apparently, you're in favor of strict type hints, but I am not, because
> it would be a pretty big change in how PHP works, and also there are
> some weird edge cases, e.g.:
>
>      <?php
>      declare(strict_types=1);
>      $num = 1 << 32;
>      $num *= $num;
>      echo dechex($num);
>
> What's the output?

I consider PHP's built-in functions as being equivalent to functions 
without type hinting. And thus the behaviour should not change from what 
it currently is.

According to the manual, the signature is

     string dechex( int $number )

In your example, $num would be a float, larger than the allowed range 
for int. So, taking the manual literally, I would expect this to cause 
an error. (The actual output is "0", by the way.) The current behaviour 
would be better "hinted" with

     string dechex( numeric $number )

which would describe the allowed values more accurately. (Assuming 
numeric = bool | int | float | string containing a number.) I do not see 
any "weird edge case" here. Currently, the manual is inaccurate by 
specifying "int" whereas the function also accepts bools, floats and 
numeric strings. The latter fact could even be regarded as an 
undocumented feature, since the documentation clearly says "int". 
Anyway, I wouldn't call this function with anything else but an integer 
argument.

Greetings,
Thomas


-- 
Ce n'est pas parce qu'ils sont nombreux à avoir tort qu'ils ont raison!
(Coluche)

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PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-23 16:28 +0200
  Re: PHP7 Stack Trace Mess Stefan+Usenet@Froehlich.Priv.at (Stefan Froehlich) - 2015-06-23 16:58 +0000
    Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-23 20:00 +0200
      Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-23 22:22 +0200
        Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-24 00:03 +0200
          Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-24 10:44 +0200
            Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-24 20:02 +0200
              Re: PHP7 Stack Trace Mess Matthew Carter <m@ahungry.com> - 2015-06-24 14:09 -0400
                Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-24 20:50 +0200
                Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-25 01:09 +0200
                Re: PHP7 Stack Trace Mess Matthew Carter <m@ahungry.com> - 2015-06-24 22:12 -0400
                Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-25 10:02 +0200
                Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-25 15:48 +0200
                Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-25 18:04 +0200
                Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-25 19:14 +0200
    Re: PHP7 Stack Trace Mess Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2015-06-23 22:07 +0200
      Re: PHP7 Stack Trace Mess "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-23 22:15 +0200
      Re: PHP7 Stack Trace Mess Stefan+Usenet@Froehlich.Priv.at (Stefan Froehlich) - 2015-06-24 06:13 +0000

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