<div dir="ltr"><div>C++14 constexpr are seriously starting to look awesome!<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jul 25, 2013 at 3:53 AM, Richard Smith <span dir="ltr"><<a href="mailto:richard-llvm@metafoo.co.uk" target="_blank">richard-llvm@metafoo.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: rsmith<br>
Date: Wed Jul 24 20:53:54 2013<br>
New Revision: 187096<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=187096&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=187096&view=rev</a><br>
Log:<br>
Add another C++14 constexpr test case.<br>
<br>
Added:<br>
    cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp<br>
<br>
Added: cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp?rev=187096&view=auto" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp?rev=187096&view=auto</a><br>

==============================================================================<br>
--- cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp (added)<br>
+++ cfe/trunk/test/SemaCXX/constexpr-duffs-device.cpp Wed Jul 24 20:53:54 2013<br>
@@ -0,0 +1,32 @@<br>
+// RUN: %clang_cc1 -std=c++1y -verify %s<br>
+<br>
+// expected-no-diagnostics<br>
+constexpr void copy(const char *from, unsigned long count, char *to) {<br>
+        unsigned long n = (count + 7) / 8;<br>
+        switch(count % 8) {<br>
+        case 0: do {    *to++ = *from++;<br>
+        case 7:         *to++ = *from++;<br>
+        case 6:         *to++ = *from++;<br>
+        case 5:         *to++ = *from++;<br>
+        case 4:         *to++ = *from++;<br>
+        case 3:         *to++ = *from++;<br>
+        case 2:         *to++ = *from++;<br>
+        case 1:         *to++ = *from++;<br>
+                } while(--n > 0);<br>
+        }<br>
+}<br>
+<br>
+struct S {<br>
+  char stuff[14];<br>
+  constexpr S() : stuff{} {<br>
+    copy("Hello, world!", 14, stuff);<br>
+  }<br>
+};<br>
+<br>
+constexpr bool streq(const char *a, const char *b) {<br>
+  while (*a && *a == *b) ++a, ++b;<br>
+  return *a == *b;<br>
+}<br>
+<br>
+static_assert(streq(S().stuff, "Hello, world!"), "should be same");<br>
+static_assert(!streq(S().stuff, "Something else"), "should be different");<br>
<br>
<br>
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</blockquote></div><br></div>