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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Incorrect interaction of decltype with operator<<"
href="https://bugs.llvm.org/show_bug.cgi?id=40475">40475</a>
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<th>Summary</th>
<td>Incorrect interaction of decltype with operator<<
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>oliver.rosten@googlemail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>I'm running clang-1000.11.45.5 on my mac. To my bafflement, the following
snippet compiles and runs, producing "Hello, world!":
struct foo
{
};
decltype(std::stringstream{} << foo{}) f{"Hello, world!"};
//f << foo{};
std::cout << f.str() << '\n';
Reinstating the commented line does at least give the expected compilation
error since no appropriate operator<< exists.
As far as I can tell, the problem seems specific to mac.</pre>
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