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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Member functions of class templates not instantiated despite [[gnu::used]]"
href="http://llvm.org/bugs/show_bug.cgi?id=19923">19923</a>
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<th>Summary</th>
<td>Member functions of class templates not instantiated despite [[gnu::used]]
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>llvm-bugs@quasiparticle.net
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>In a class template, g++ instantiates member functions marked with
[[gnu::used]] even when those functions are used nowhere in the program. clang
does not. This causes code to compile that doesn't compile on g++, e.g.
#include <type_traits>
template<class I>
class X {
[[gnu::used]]
static void check() {
static_assert(std::is_enum<I>::value, "");
}
};
X<int> x;</pre>
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