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To: Peter Lind <peter.e.lind@gmail.com>
Cc: Mateusz Kocielski <shm@digitalsun.pl>, Xinchen Hui <laruence@gmail.com>, 
	Chris London <me@chrislondon.co>, "internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a11c3ca140e0f8804e1d98e1c
Subject: Re: [PHP-DEV] Feature Proposal: Allow letter decrementing
From: yohgaki@ohgaki.net (Yasuo Ohgaki)

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Content-Type: text/plain; charset=ISO-8859-1

Hi,

I take a look at the code.
It does support [0-9] also.

[yohgaki@dev tests]$ php -r "\$a = ' a10';for (\$i=0; \$i<10;\$i++)
var_dump(++\$a);"
string(4) " a11"
string(4) " a12"
string(4) " a13"
string(4) " a14"
string(4) " a15"
string(4) " a16"
string(4) " a17"
string(4) " a18"
string(4) " a19"
string(4) " a20"

It sounds good to have string decrements.


2013/7/19 Peter Lind <peter.e.lind@gmail.com>

> Interesting to note that although Perl 6 is apparently capable of
> decrementing strings, it doesn't fully mirror the incrementing:
>
> http://feather.perl6.nl/syn/S03.html#line_516
>
> Specifically: decrementing 'AAA' would not turn into 'ZZ' but would error,
> according to that link
>

Carry handle of decrements is more complex than increments.
It may be the reason.

Regards,

--
Yasuo Ohgaki
yohgaki@ohgaki.net

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