[LLVMbugs] [Bug 19878] New: variadic template arguments deduction

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19878

            Bug ID: 19878
           Summary: variadic template arguments deduction
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: vanyacpp at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This code is accepted by MSVC, but it is rejected by clang. Because clang can
not deduce template for T. I don't know which compiler is right, but behavior
of MSVC seems reasonable.

template<class ...T>
struct X
{};

template<class ...T>
void foo(X<T, T...>... a);

void test()
{
    foo(X<int, int, double>(), X<double, int, double>());
}

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