* Pali Rohár <pali.ro...@gmail.com> [2016-05-06 14:50]:
> 1. What is difference between those two calls?
>
>  utf8::encode($str);
>
> and
>
>  $str = Encode::encode('utf8', $str);
>
> 2. What is difference between those?
>
>  utf8::decode($str);
>  $str = Encode::decode_utf8($str);

They do the same thing with different interfaces. utf8::encode/decode
modify a string in-place and return a boolean to signal success or not.
Encode.pm returns a copy and can be configured to do a range of things
with invalid input, from converting invalid bytes to replacement marks
to throwing an exception.

> 3. Where is implementation of utf8::encode/decode functions? It is not
> in utf8.pm, nor in utf8_heavy.pl and also not in unicore/Heavy.pl. And
> what those functions doing?

They are part of the perl interpreter and defined in universal.c as thin
wrappers around code ultimately from sv.c.

Regards,
-- 
Aristotle Pagaltzis // <http://plasmasturm.org/>

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