[LLVMbugs] [Bug 23267] New: missing initializer on template instantiated from variadic template class

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23267

            Bug ID: 23267
           Summary: missing initializer on template instantiated from
                    variadic template class
           Product: clang
           Version: 3.5
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: camorton2 at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

#include <cstdio>

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

template < template < class ..., class ... _T , _T ... > class ... T > struct B
{ 
    template <class ...U> struct C {
        template <int ...I> struct D {
            A<T<U>[I]...> f()
            {
                printf("Yes called f\n");
                return A<T<U>[I]...>();
            }
        };
    };
};

template <class T> struct E {};

A<> a1 = B<>::C<>::D<>().f();

int main(void){}

Function f() is not called.

Clang AST does not have the initializer for a1

<clang::VarDecl>
VarDecl 0x13197c50 <a.cpp:20:1, col:5> col:5 a1 'A<>':'struct A<>'
</clang::VarDecl>

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