[llvm-bugs] [Bug 33696] New: clang accepts lambda expression in template argument

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33696

            Bug ID: 33696
           Summary: clang accepts lambda expression in template argument
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangb...@nondot.org
          Reporter: tras...@gmail.com
                CC: dgre...@apple.com, llvm-bugs@lists.llvm.org

clang r307127

void foo();
template <auto f>
struct F
{
    ~F() { f(); }
};

int main()
{
   F<+[](){foo();}> f;
}

Note the + to force the conversion to function pointer. gcc rejects it.

https://stackoverflow.com/questions/44485610/will-i-be-able-to-declare-a-constexpr-lambda-inside-a-template-parameter

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