http://llvm.org/bugs/show_bug.cgi?id=14858
Bug #: 14858
Summary: Parameter pack expanded into alias template
incorrectly
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
count::value should equal sizeof...(T) in this code, but is always 1, causing
the assertions to fail.
Tested with clang 3.0 and 3.3 (trunk 170278)
template<int N> struct Int { static const int value = N; };
template<typename... T>
using Count = Int<sizeof...(T)>;
template<typename... T>
struct test
{
typedef Count< T... > count;
static_assert( count::value == sizeof...(T), "clang can count" );
};
template struct test<int>; // OK
template struct test<>; // fails
template struct test<int, int>; // fails
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