Re: A sub named ∃

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Re^2: A sub named ∃ by vkon (Curate) on Nov 30, 2006 at 11:11 UTC
I suspect you know the situation better than me, but why in this particular case the explanation that ∃!~/\w/ will not suffice? Perl allows utf8-names from letters of non-English alphabets, although documentation strictly warns against this.	[reply]
Re^3: A sub named ∃ by diotalevi (Canon) on Nov 30, 2006 at 16:48 UTC
/w isn't the pattern for matching the first character in identifiers. I never consider \w when matching that first character. In unicode, the pattern to follow is likely /\A\p{IdFirst}\w\z/. In ASCII, the pattern is `/\A[[:alpha:]_]\w\z/`. The pattern `/\^\w+\z/` is always wrong when matching identifiers. ⠤⠤ ⠙⠊⠕⠞⠁⠇⠑⠧⠊	[reply] [d/l] [select]
Re^4: A sub named ∃ by vkon (Curate) on Nov 30, 2006 at 21:27 UTC
all my concious life any unicode-capable perl matches with \w any unicode letter, and I often match russian letters e.g. 0x0432 with \w. I never did `[[:alpha:]]`, but did succeeded russian letters matching with \w	[reply] [d/l]
Re^5: A sub named ∃ by diotalevi (Canon) on Nov 30, 2006 at 21:39 UTC
Re^6: A sub named ∃ ([^\W\d]) by tye (Sage) on Nov 30, 2006 at 22:10 UTC
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Re^6: A sub named ∃ by vkon (Curate) on Nov 30, 2006 at 22:20 UTC
Re^2: A sub named ∃ by ikegami (Patriarch) on Nov 30, 2006 at 16:36 UTC
Note: In the following source code, replace "`∃`" with the UTF-8 representation of "∃", and replace "`трщь`" with the UTF-8 representation of "трщь". `use strict; use warnings; no warnings 'redefine'; for ( [ "Symbol, use utf8: " => "use utf8; sub ∃ {}" ], [ "Symbol, no utf8: " => "no utf8; sub ∃ {}" ], [ "Russian, use utf8: " => "use utf8; sub трщ&#11 +00; {}" ], [ "Russian, no utf8: " => "no utf8; sub трщ&#11 +00; {}" ], ) { print $_->[0], eval "$_->[1]; 1" ? "Success\n" : $@; }` [download] outputs `Symbol, use utf8: Illegal declaration of anonymous subroutine at (eva +l 1) line 1. Symbol, no utf8: Illegal declaration of anonymous subroutine at (eva +l 2) line 1. Russian, use utf8: Success Russian, no utf8: Illegal declaration of anonymous subroutine at (eva +l 4) line 1.` [download] If the problem is what you say it is, wouldn't `use utf8` have no effect on the error?	[reply] [d/l] [select]