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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Conditional explicit not respected with out-of-line definition"
href="https://bugs.llvm.org/show_bug.cgi?id=42980">42980</a>
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<th>Summary</th>
<td>Conditional explicit not respected with out-of-line definition
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++2a
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>barry.revzin@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Reduced from StackOverflow (<a href="https://stackoverflow.com/q/57467490/2069064">https://stackoverflow.com/q/57467490/2069064</a>):
using size_t = decltype(sizeof(0));
struct Str {
template <size_t N>
explicit(N > 7) Str(char const (&str)[N]);
};
#ifdef OUT_OF_LINE
template <size_t N>
Str::Str(char const(&str)[N]) { }
#endif
Str a = "short";
Str b = "not so short";
As-is, clang correctly rejects the construction of b (since that constructor is
explicit). But with -DOUT_OF_LINE, clang accepts.</pre>
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