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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [OpenCL C++] Lambda/Functions broken in templates"
href="https://bugs.llvm.org/show_bug.cgi?id=38426">38426</a>
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<th>Summary</th>
<td>[OpenCL C++] Lambda/Functions broken in templates
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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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>
</tr>
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<th>Component</th>
<td>OpenCL
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>erich.keane@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>as you can see here:
<a href="https://godbolt.org/g/PnxFQJ">https://godbolt.org/g/PnxFQJ</a>
It appears that some of the OpenCL C++ implementation messes with the
qualifiers of function types, so this breaks. I believe the lambda issue has
to do with address-space modification, but I'm not sure yet.
void func();
template<typename Func>
void foo(Func F) {
F();
}
int main() {
foo(func);
foo([](){});
}
<source>:8:5: error: function cannot be called 'main'
int main() {
^
<source>:9:9: error: taking address of function is not allowed
foo(func);
^
<source>:5:5: error: no matching function for call to object of type '(lambda
at <source>:10:9)'
F();
^
<source>:10:5: note: in instantiation of function template specialization
'foo<(lambda at <source>:10:9)>' requested here
foo([](){});
^
<source>:10:9: note: candidate function not viable: address space mismatch in
'this' argument ('(lambda at <source>:10:9)'), parameter type must be 'const
(lambda at <source>:10:9)'
foo([](){});
^
<source>:10:9: note: conversion candidate of type 'void (*)()'
3 errors generated.
Compiler returned: 1</pre>
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