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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 --- - Erroneous "too many template arguments for class template" (via template template)?"
href="http://llvm.org/bugs/show_bug.cgi?id=20698">20698</a>
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<th>Summary</th>
<td>Erroneous "too many template arguments for class template" (via template template)?
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</td>
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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>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>zerolo@gmail.com
</td>
</tr>
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<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>Created <span class=""><a href="attachment.cgi?id=12914" name="attach_12914" title="Repo failing using -std=c++11">attachment 12914</a> <a href="attachment.cgi?id=12914&action=edit" title="Repo failing using -std=c++11">[details]</a></span>
Repo failing using -std=c++11
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.3.0
Thread model: posix
The attached repo (which compiles fine with g++ 4.8.1) should be valid IMO, but
instead clang complains about
<span class="quote">> clang++ --std=c++11 clang_repo.cpp </span >
clang_repo.cpp:21:6: error: no matching member function for call to 'Get'
t2.Get<1>(); // not ok
~~~^~~~~~
clang_repo.cpp:7:18: note: candidate template ignored: substitution failure
[with Is = <1>]: too many template arguments for class template 'Foo'
Inner<Is ...> &Get()
~~~~~ ^
1 error generated.
but the number of template arguments seem to be correct (i.e. one).
I've reduced this down from a case where the Inner-template was variadic, but
this doesn't seem to be the cause.
Making the Get-method non-variadic makes the error go away, but as the
Inner-template is supposed to be variadic, I can't really do that.
template<template<int> class Inner>
struct Test
{
// works if Is is not variadic
template<int ...Is>
Inner<Is ...> &Get()
{
static Inner<Is ...> a;
return a;
}
};
template<int A>
struct Foo { };
int main (int argc, char const *argv[])
{
Foo<1> f; // ok
Test<Foo> t2; // ok
t2.Get<1>(); // not ok
return 0;
}</pre>
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