From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Sun, 7 Apr 2024 13:41:34 -0500
Subject: new repository

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+    <h1 id="firstHeading" class="firstHeading">C attribute: fallthrough <span class="t-mark-rev t-since-c23">(since C23)</span>
+</h1>            <p>Indicates that the fall through from the previous case label is intentional and should not be diagnosed by a compiler that warns on fallthrough.</p>
+<h3 id="Syntax"> Syntax</h3> <table class="t-sdsc-begin">  <tr class="t-sdsc"> <td class="t-sdsc-nopad"> <code>[[</code> <code>fallthrough</code> <code>]]</code><br><code>[[</code> <code>__fallthrough__</code> <code>]]</code> </td> <td class="t-sdsc-nopad"> </td> <td class="t-sdsc-nopad"> </td>
+</tr> 
+</table> <h3 id="Explanation"> Explanation</h3> <p>May only be used in an <a href="../declarations" title="c/language/declarations">attribute declaration</a> to create a <i>fallthrough declaration</i> (<code>[[fallthrough]];</code>).</p>
+<p>A fallthrough declaration may only be used in a <a href="../switch" title="c/language/switch"><code>switch</code></a> statement, where the next block item (statement, declaration, or label) to be encounted is a statement with a <code>case</code> or <code>default</code> label for that switch statement.</p>
+<p>Indicates that the fall through from the previous case label is intentional and should not be diagnosed by a compiler that warns on fallthrough.</p>
+<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdbool.h&gt;
+ 
+void g(void) {}
+void h(void) {}
+void i(void) {}
+ 
+void f(int n) {
+  switch (n) {
+    case 1:
+    case 2:
+      g();
+     [[fallthrough]];
+    case 3: // no warning on fallthrough
+      h();
+    case 4: // compiler may warn on fallthrough
+      if(n &lt; 3) {
+          i();
+          [[fallthrough]]; // OK
+      }
+      else {
+          return;
+      }
+    case 5:
+      while (false) {
+        [[fallthrough]]; // ill-formed: no subsequent case or default label
+      }
+    case 6:
+      [[fallthrough]]; // ill-formed: no subsequent case or default label
+  }
+}
+ 
+int main(void) {}</pre></div> </div> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/language/attributes/fallthrough" title="cpp/language/attributes/fallthrough">C++ documentation</a></span> for <code>fallthrough</code> </td>
+</tr> </table>           <div class="_attribution">
+  <p class="_attribution-p">
+    &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
+    <a href="https://en.cppreference.com/w/c/language/attributes/fallthrough" class="_attribution-link">https://en.cppreference.com/w/c/language/attributes/fallthrough</a>
+  </p>
+</div>
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