It reverses Unicode code points
No. It doesn't know anything about Unicode and there's no requirement for the string to be Unicode text.
not characters in the usual, well-understood sense of the word.
In my experience, "character" is the constituent element of a string, and never a grapheme except by happenstance. Let's just say there is no such consensus. Regardless, that's the definition used here.
If I understand the design principles of Perl correctly, the reverse function should properly reverse extended grapheme clusters
No. reverse provides a vital string operation. It should not assume the string is Unicode text. Reversing text is also a useful function, but it is not provided by reverse.
Same goes with substr and length.
when the thing being reversed is Unicode text (and Perl understands it is Unicode text), and it should reverse bytes otherwise.
Perl doesn't have a means of "understanding a string is Unicode text".
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|