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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - typename in trailing return type prevents break before arrow"
href="https://bugs.llvm.org/show_bug.cgi?id=42835">42835</a>
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<th>Summary</th>
<td>typename in trailing return type prevents break before arrow
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>7.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Formatter
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>mateusz@loskot.net
</td>
</tr>
<tr>
<th>CC</th>
<td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
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<pre>Submitting bug report about this issue which I discussed on the list a while
ago: <a href="http://lists.llvm.org/pipermail/cfe-users/2018-November/001421.html">http://lists.llvm.org/pipermail/cfe-users/2018-November/001421.html</a>
I've upgraded from clang-format 6 to 7.
If the arrow `->` is followed by typename keyword, it prevents breaking line
Before the arrow:
- code before:
template <int K, typename E, typename L, int N>
auto bbbbbbbbbbbbbbbbbbbbbbb(detail::base<E, L, N>& p) -> typename
std::add_lvalue_reference<E>::type;
- code after:
template <int K, typename E, typename L, int N>
auto bbbbbbbbbbbbbbbbbbbbbbb(detail::base<E, L, N> &p) ->
typename std::add_lvalue_reference<E>::type;
Whereas, if typename is removed:
- code before
template <int K, typename E, typename L, int N>
auto ccccccccccccccccccccccc(detail::base<E, L, N>& p) ->
std::add_lvalue_reference<E>::type;
- code after:
template <int K, typename E, typename L, int N>
auto ccccccccccccccccccccccc(detail::base<E, L, N> &p)
-> std::add_lvalue_reference<E>::type;
Presumably, it may be related to <a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad -> formatting if macro is used in trailing return function"
href="show_bug.cgi?id=42150">bug 42150</a></pre>
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