https://cppclub.uk/tags/cppchat/ Recent content in CppChat on C++ Club Hugo en-gb Gleb Dolgich Thu, 14 Feb 2019 00:00:00 +0000 https://cppclub.uk/meetings/2019/2019-02-14/ Thu, 14 Feb 2019 00:00:00 +0000 https://cppclub.uk/meetings/2019/2019-02-14/ <div class="document" id="meeting-14-february-2019"> <h1 class="title">Meeting 14 February 2019</h1> <div class="section" id="avoid-unsigned"> <h2>Avoid unsigned</h2> <ul class="simple"> <li><a class="reference external" href="http://wg21.link/P0330R4">P0330R4</a> Literal Suffixes for ptrdiff_t and size_t</li> <li><a class="reference external" href="http://wg21.link/P1227R1">P1227R1</a> Signed ssize() functions, unsigned size() functions</li> <li><a class="reference external" href="http://wg21.link/P1428R0">P1428R0</a> Subscripts and sizes should be signed</li> </ul> <pre class="code c++ literal-block"> <span class="keyword">template</span><span class="whitespace"> </span><span class="operator">&lt;</span><span class="keyword">typename</span><span class="whitespace"> </span><span class="name class">C</span><span class="operator">&gt;</span><span class="whitespace"> </span><span class="keyword">constexpr</span><span class="whitespace"> </span><span class="keyword type">int</span><span class="whitespace"> </span><span class="name">ssize</span><span class="punctuation">(</span><span class="keyword">const</span><span class="whitespace"> </span><span class="name">C</span><span class="operator">&amp;</span><span class="whitespace"> </span><span class="name">c</span><span class="punctuation">)</span><span class="whitespace"> </span><span class="punctuation">{</span><span class="whitespace"> </span><span class="keyword">const</span><span class="whitespace"> </span><span class="keyword type">size_t</span><span class="whitespace"> </span><span class="name">size</span><span class="whitespace"> </span><span class="operator">=</span><span class="whitespace"> </span><span class="name">c</span><span class="punctuation">.</span><span class="name">size</span><span class="punctuation">();</span><span class="whitespace"> </span><span class="name">assert</span><span class="punctuation">(</span><span class="name">size</span><span class="whitespace"> </span><span class="operator">&lt;=</span><span class="whitespace"> </span><span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="keyword type">size_t</span><span class="operator">&gt;</span><span class="punctuation">(</span><span class="name">std</span><span class="operator">::</span><span class="name">numeric_limits</span><span class="operator">&lt;</span><span class="keyword type">int</span><span class="operator">&gt;::</span><span class="name">max</span><span class="punctuation">()));</span><span class="whitespace"> </span><span class="keyword">return</span><span class="whitespace"> </span><span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="keyword type">int</span><span class="operator">&gt;</span><span class="punctuation">(</span><span class="name">size</span><span class="punctuation">);</span><span class="whitespace"> </span><span class="punctuation">}</span> </pre> </div> <div class="section" id="cpp-chat-with-nicolai-josuttis"> <h2>Cpp.chat with Nicolai Josuttis</h2> <p><a class="reference external" href="https://youtu.be/_CaP_xwfAFU">https://youtu.be/_CaP_xwfAFU</a></p> <ul class="simple"> <li>Initialisation is broken!</li> <li>Initialiser lists are broken!</li> <li>Auto initialisation is broken!</li> </ul> <img alt="/img/original_rage.jpg" src="https://cppclub.uk/img/original_rage.jpg" style="width: 150.0px; height: 117.30000000000001px;" /> </div> <div class="section" id="cppcon-2018-geoff-romer-what-do-you-mean-thread-safe"> <h2>CppCon 2018 - Geoff Romer - What do you mean &quot;thread-safe&quot;?</h2> <p><a class="reference external" href="https://youtu.be/s5PCh_FaMfM">https://youtu.be/s5PCh_FaMfM</a></p> https://cppclub.uk/meetings/2018/2018-12-13/ Thu, 13 Dec 2018 00:00:00 +0000 https://cppclub.uk/meetings/2018/2018-12-13/ <h1 id="meeting-13-december-2018">Meeting 13 December 2018</h1> <h2 id="bjarne-stroustrup-on-cppchat">Bjarne Stroustrup on CppChat</h2> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/OF7xbz8fWPg?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <ul> <li>education</li> <li>The Standards Committee</li> <li>C++20 and beyond</li> </ul> <p><img src="https://cppclub.uk/img/stroustrup-cppchat.png" alt=""></p> <h2 id="matt-godbolt-on-cppchat">Matt Godbolt on CppChat</h2> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/4KiqKjb0OzY?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <ul> <li>Compiler Explorer, contributors, infrastructure</li> <li>Tools —&gt; LLVM MCA (machine code analyser), Clang Tidy, PAHole</li> <li>Patched compiler versions to explore new features</li> <li>Code execution is coming</li> <li>Undefined behaviour</li> </ul> <p><img src="https://cppclub.uk/img/godbolt-cppchat.png" alt=""></p> https://cppclub.uk/meetings/2018/2018-08-09/ Thu, 09 Aug 2018 00:00:00 +0000 https://cppclub.uk/meetings/2018/2018-08-09/ <h1 id="meeting-9-august-2018">Meeting 9 August 2018</h1> <h2 id="ieee-most-popular-programming-languages-of-2018">IEEE Most popular programming languages of 2018</h2> <p><a href="https://spectrum.ieee.org/at-work/innovation/the-2018-top-programming-languages">Article</a>, <a href="https://www.reddit.com/r/programming/comments/944o7l/the_2018_top_programming_languages_according_to/">Reddit</a></p> <p><img src="https://cppclub.uk/img/ieee-languages2018.png" alt=""></p> <h2 id="follow-up-toby-allsopp---an-introduction-to-the-proposed-coroutine-support-for-c">Follow-up: Toby Allsopp - An Introduction to the Proposed Coroutine Support for C++</h2> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/nWuXubffryo?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="Toby Allsopp - An Introduction to the Proposed Coroutine Support for C&#43;&#43;"></iframe> </div> <h3 id="how-to-use-coroutines-today">How to use coroutines today</h3> <ul> <li>Visual Studio 2017 (<code>/await</code>)</li> <li>Clang 5.0 with libc++ 5.0 (<code>-fcoroutines-ts -stdlib=libc++</code>)</li> </ul> <h3 id="abstraction-libraries">Abstraction libraries</h3> <ul> <li><a href="https://github.com/lewissbaker/cppcoro">cppcoro</a> <ul> <li><code>task</code>, <code>generator</code>, <code>async_generator</code>, <code>async_mutex</code>, &hellip;</li> </ul> </li> <li><a href="https://github.com/ericniebler/range-v3">range-v3</a> <ul> <li><code>generator</code></li> </ul> </li> </ul> <h2 id="clang-concepts-is-feature-complete">Clang Concepts is feature-complete</h2> <ul> <li><a href="https://www.reddit.com/r/cpp/comments/958sj9/clang_concepts_is_now_featurecomplete/">Announcement</a></li> <li><a href="https://godbolt.org/g/Xthpfw">Compiler Explorer</a></li> <li><a href="https://github.com/saarraz/clang-concepts">Code</a> <ul> <li>Andrew Sutton&rsquo;s <a href="https://www.reddit.com/r/cpp/comments/958sj9/clang_concepts_is_now_featurecomplete/e3se954/">reply</a>: &ldquo;If I had not gone on vacation, I might have beaten you to the punch in GCC ;) I&rsquo;m in the process of working through older TS tests.&rdquo;</li> </ul> </li> </ul> <h2 id="the-optimal-way-to-return-from-a-function-by-jason-turner">The optimal way to return from a function, by Jason Turner</h2> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/9mWWNYRHAIQ?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="The optimal way to return from a function, by Jason Turner"></iframe> </div> <p>Single return (20%):</p> https://cppclub.uk/meetings/2018/2018-06-07/ Thu, 07 Jun 2018 00:00:00 +0000 https://cppclub.uk/meetings/2018/2018-06-07/ <h1 id="meeting-7-june-2018">Meeting 7 June 2018</h1> <h2 id="cppchat-episode-29-weve-dropped-the-m-word">Cpp.chat Episode #29: &ldquo;We&rsquo;ve Dropped The &lsquo;M&rsquo; Word&rdquo;</h2> <blockquote> <p>In this episode we discuss Herb Sutter&rsquo;s new proposal, p0709, &ldquo;Zero-overhead deterministic exceptions&rdquo;, a.k.a. &ldquo;Static Exceptions&rdquo; - and a couple of supporting proposals from Niall Douglas (p1028 and p1029).</p> </blockquote> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/aODRQ99j2uw?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="Cpp.chat Episode #29"></iframe> </div> <ul> <li><a href="https://itunes.apple.com/gb/podcast/cpp-chat/id1378325120?mt=2">iTunes</a></li> <li><a href="https://overcast.fm/+M9D4KS6Qc">Overcast</a></li> </ul> <h2 id="the-incredible-shrinking-standard---alisdair-meredith-accu-2018">The Incredible Shrinking Standard - Alisdair Meredith [ACCU 2018]</h2> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/YTV2frD1W4Y?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="The Incredible Shrinking Standard - Alisdair Meredith"></iframe> </div> <h3 id="static-functions">Static Functions</h3> <ul> <li>Can&rsquo;t be used with templates in C++98 (internal linkage) <ul> <li>C compatibility feature, deprecated in initial C++98 standard in favour of unnamed namespaces</li> <li>Un-deprecated in C++11 (all such functions must work with templates)</li> </ul> </li> <li>Modules: TBD</li> </ul> <h3 id="incrementing-bool">Incrementing <code>bool</code></h3> <ul> <li><code>bool++</code> deprecated in original C++98</li> <li><code>++bool</code> deprecated in C++03</li> <li>Added to C in C99</li> <li>Both removed in C++17</li> </ul> <h3 id="incrementing-bool-1">Incrementing <code>bool</code></h3> <p>Was:</p> https://cppclub.uk/meetings/2018/2018-05-03/ Thu, 03 May 2018 00:00:00 +0000 https://cppclub.uk/meetings/2018/2018-05-03/ <h1 id="meeting-3-may-2018">Meeting 3 May 2018</h1> <h2 id="cppchat">Cpp.chat</h2> <ul> <li><a href="http://slashslash.info/cppchat/">Website</a></li> </ul> <h2 id="cppeurope">CppEurope</h2> <ul> <li><a href="https://www.youtube.com/channel/UCZS60J7KcQOLf87H3P_PTlg">YouTube channel</a></li> </ul> <h2 id="gcc-81-released">GCC 8.1 released</h2> <ul> <li><a href="https://gcc.gnu.org/ml/gcc/2018-05/msg00017.html">Announcement</a></li> </ul> <p>John Bandela:</p> <blockquote> <p>This is a truly exciting time to be a C++ programmer. We are getting a new standard every 3 years with 3 popular compilers that are all committed to implementing the standard as fast as possible. This is truly a welcome change from C++98 &lt;&hellip;&gt; Kudos to the GCC team for this release.</p> </blockquote> <h2 id="webkit-is-on-c17">Webkit is on C++17</h2> <ul> <li><a href="https://trac.webkit.org/changeset/231170/webkit">Announcement</a></li> </ul> <h2 id="microsoft-gsl-100">Microsoft GSL 1.0.0</h2> <ul> <li><a href="https://github.com/Microsoft/GSL/releases/tag/v1.0.0">Release</a></li> <li><a href="https://www.reddit.com/r/cpp/comments/8gfsue/microsofts_gsl_introduces_numbered_releases_with/">Reddit</a> <ul> <li>GSL = <a href="https://www.gnu.org/software/gsl/">Gnu Scientific Library</a></li> <li><a href="https://www.reddit.com/r/cpp/comments/8gfsue/microsofts_gsl_introduces_numbered_releases_with/dycazet/">Beware</a></li> </ul> </li> </ul> <h2 id="span-lite">Span-lite</h2> <p>A single-file header-only version of a C++20-like span for C++98, C++11 and later</p>