<div dir="auto">Also keep in mind that without a locale using a multibyte charset, i.e. not the default "C" locale, conversion will be silently lossy. </div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 3, 2019, 11:26 Tom Honermann <<a href="mailto:tom@honermann.net" target="_blank" rel="noreferrer">tom@honermann.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div class="m_1543556410975187681m_2238683992514537845moz-cite-prefix">On 5/3/19 7:12 AM, Lyberta wrote:<br>
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<pre class="m_1543556410975187681m_2238683992514537845moz-quote-pre">So GCC 9 has been released and I'm starting migration to char8_t. The
first question is how to print std::u8string? Since std::cout works in
execution character set I need a way to convert string from UTF-8 to ECS.</pre>
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I wish I had a better suggestion for you then std::c8rtomb.
JeanHeyd is working on a proposal for modern transcoding interfaces.<br>
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<pre class="m_1543556410975187681m_2238683992514537845moz-quote-pre">
It looks like the only way is to use std::c8rtomb but the API is very
cryptic and I don't understand it. Can someone provide an example code?</pre>
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<p>As far as I know, no one has actually implemented std::c8rtomb
yet. It has been on my todo list for a long time to contribute an
implementation to glibc, but I haven't found the time yet.</p>
<p>c8rtomb is intended to match the existing c16rtomb and c32rtomb
functions, so inherits design and wording from them. The wording
in the C++ standard for c8rtomb is a lightly edited copy of the C
standard's wording for c16rtomb. That wording is, well, it could
be improved. A lot. I intentionally chose to keep it aligned
with the C standard so as not to cause confusion for implementors
(presumably, they have already come to an understanding with C's
wording).</p>
<p>I suggest looking at the examples for c16rtomb on
<a href="http://cppreference.com" rel="noreferrer noreferrer" target="_blank">cppreference.com</a>.<br>
- <a class="m_1543556410975187681m_2238683992514537845moz-txt-link-freetext" href="https://en.cppreference.com/w/cpp/string/multibyte/c16rtomb" rel="noreferrer noreferrer" target="_blank">https://en.cppreference.com/w/cpp/string/multibyte/c16rtomb</a><br>
</p>
<p>Tom.<br>
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