[llvm-bugs] [Bug 51899] New: [c++] variadic template specialization doesn't consider template parameter default value

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https://bugs.llvm.org/show_bug.cgi?id=51899

            Bug ID: 51899
           Summary: [c++] variadic template specialization doesn't
                    consider template parameter default value
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nickhuang99 at hotmail.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

The following code snippet is accepted. But I thought the template
specialization should consider "First" is using default type "char" instead of
"int". Is this a bug? (I tried in godbolt.org and both GCC and MSVC++ all
behave like clang. However, still I doubt this is correct. Can someone verify
this?



template<class...Ts,class First=char>
void foo(First,Ts...){}
template<>
void foo<int*>(int,int*);

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