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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Problem with template template parameter SFINAE"
href="https://bugs.llvm.org/show_bug.cgi?id=45728">45728</a>
</td>
</tr>
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<th>Summary</th>
<td>Problem with template template parameter SFINAE
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>9.0
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>CUDA
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>james@invexed.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The following code compiles with Clang 9 when compiling for CPUs, but not for
CUDA:
template<typename T>
using Identity = T;
template<template<typename> typename>
struct TemplateSink;
template<typename T>
struct Trait
{
static constexpr auto value = false;
};
template<typename T>
struct Trait<Identity<TemplateSink<T::template nested>>>
{
static constexpr auto value = true;
};
error: template argument for template template parameter must be a class
template or type alias template
struct Trait<Identity<TemplateSink<T::template nested>>>
^
error: expected a type
};
^</pre>
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