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Re: [perl #131685] Rename utf8::is_utf8() (and other functions)

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July 4, 2017 10:04
Re: [perl #131685] Rename utf8::is_utf8() (and other functions)
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On Tuesday 04 July 2017 11:22:42 demerphq wrote:
> No. This is a myth. Plain and simply a myth.
> People have a hard time accepting it, but the utf8 flag tells parts of
> the internals to use different rules for certain operations, when set
> those rules are Unicode. When the flag is not set the default rules
> are derived from ASCII.
> You can see the difference in the following:
> "ba\x{DF}"=~/ss/i;

$ perl -E 'say "matched" if "ba\x{DF}"=~/ss/i;'

> "ba\N{U+DF}"=~/ss/i;

$ perl -E 'say "matched" if "ba\N{U+DF}"=~/ss/i;'

> The latter matches because \N{U+DF} produces the unicode code point
> DF, and the former does not match, because  \x{DF} produces the ASCII
> octet DF instead. The former is an ASCII string, and the later is a
> Unicode string.

No, both were matched under Perl 5.24.1.

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