^<\?xml version="1.0"\?>
<CastXML[^>]*>
  <Function id="_1" name="start" returns="_2" context="_3" location="f1:1" file="f1" line="1" mangled="[^"]+"/>
  <FundamentalType id="_2" name="void" size="[0-9]+" align="[0-9]+"/>
  <Namespace id="_3" name="::"/>
  <File id="f1" name=".*/test/input/GNU-attr-assume.cxx"/>
</CastXML>$
