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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Misleading error message: error: implicit instantiation of undefined template"
href="http://llvm.org/bugs/show_bug.cgi?id=21080">21080</a>
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<th>Summary</th>
<td>Misleading error message: error: implicit instantiation of undefined template
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>MacOS X
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</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
</td>
</tr>
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<th>Reporter</th>
<td>ilja.j.honkonen@nasa.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Trying to compile a reduced version of the program at
<a href="https://github.com/nasailja/gensimcell/blob/a342ba0347de2f0d333641a39477de7c2abbe3cb/tests/parallel/one_variable.cpp">https://github.com/nasailja/gensimcell/blob/a342ba0347de2f0d333641a39477de7c2abbe3cb/tests/parallel/one_variable.cpp</a>
produces a very misleading message considering that the correct fix is to just
add #include "array" to the file:
../../source/gensimcell_impl.hpp:626:31: error: implicit instantiation of
undefined template 'std::__1::array<double, 3>'
typename Variable::data_type data;
^
../../source/gensimcell.hpp:136:9: note: in instantiation of template class
'gensimcell::detail::Cell_impl<Optional_Transfer, 1, test_variable2>'
requested here
public detail::Cell_impl<Transfer_Policy, sizeof...(Variables),
Variables...>
^
one_variable.cpp:53:6: note: in instantiation of template class
'gensimcell::Cell<gensimcell::Optional_Transfer,
test_variable2>' requested here
a[0].set_transfer_all(true, v2);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__tuple:69:65:
note:
template is declared here
template <class _Tp, size_t _Size> struct _LIBCPP_TYPE_VIS_ONLY array;
^
1 error generated.
A correct looking array (std::...::array) is even mentioned in the error
message. It probably wouldn't be too difficult to give a hint to the user that
array is being used without including the required header...</pre>
</div>
</p>
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