n that ABI.
</span><br>
<span id="p0522">(12): Despite being the the resolution to a Defect Report, this
feature is disabled by default in all language versions, and can be enabled
explicitly with the flag <tt>-frelaxed-template-template-args</tt> in Clang 4.
The change to the standard lacks a corresponding change for template partial
ordering, resulting in ambiguity errors for reasonable and previously-valid
code. This issue is expected to be rectified soon.
</span>
</p>
</details>

<h2 id="cxx20">C++2a im