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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang compiler failed to compile pseudo-destructor-name code in a complex template"
href="https://llvm.org/bugs/show_bug.cgi?id=23523">23523</a>
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<th>Summary</th>
<td>Clang compiler failed to compile pseudo-destructor-name code in a complex template
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++14
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>test1@doramail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Based on
<a href="http://stackoverflow.com/questions/30201414/why-does-clang-compiler-fail-to-compile-the-following-variadic-template-code">http://stackoverflow.com/questions/30201414/why-does-clang-compiler-fail-to-compile-the-following-variadic-template-code</a>,
the following code failed to compile with Clang but it works fine in GCC.
Steps to Reproduce:
Create a file with the following code
#include <string>
#include <iostream>
#include <tuple>
#include <utility>
template<typename... T> struct test {
using args_type = std::tuple<T...>;
args_type x;
template<std::size_t... I>
void callme(std::index_sequence<I...>) {
int _[] = {(std::get<I>(x).std::tuple_element<I,
args_type>::type::~type(), true)...};
}
};
int main() {
}
Expected result:
It should compile fine
Actual result:
It looks like Clang failed to use the context to evaluate type::~type()
correctly. Clang failed with the following error:
clang-3.7 -std=gnu++1y -Wc++14-extensions test.cpp
test.cpp:15:56: error: expected ')'
int _[] = {(std::get<I>(x).std::tuple_element<I,
args_type>::type::~type(), true)...};
^
test.cpp:15:20: note: to match this '('
int _[] = {(std::get<I>(x).std::tuple_element<I,
args_type>::type::~type(), true)...};
^
1 error generated.
Version:
clang-3.7 -v
Ubuntu clang version 3.7.0-svn236859-1~exp1 (trunk) (based on LLVM 3.7.0)
Target: x86_64-pc-linux-gnu
Thread model: posix</pre>
</div>
</p>
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