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[ADT] Fix missing 'template' keyword #98252

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[ADT] Fix missing 'template' keyword #98252

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4 changes: 2 additions & 2 deletions llvm/include/llvm/ADT/ArrayRef.h
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Original file line number Diff line number Diff line change
Expand Up @@ -460,8 +460,8 @@ namespace llvm {

OwningArrayRef &operator=(OwningArrayRef &&Other) {
delete[] this->data();
this->MutableArrayRef<T>::operator=(Other);
Other.MutableArrayRef<T>::operator=(MutableArrayRef<T>());
this->template MutableArrayRef<T>::operator=(Other);
Other.template MutableArrayRef<T>::operator=(MutableArrayRef<T>());
Comment on lines +463 to +464
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This fails with Ubuntu-20.04 g++.

llvm/include/llvm/ADT/ArrayRef.h:463:40: error: expected ‘;’ before ‘::’ token
  463 |       this->template MutableArrayRef<T>::operator=(Other);
      |                                        ^~
      |                                        ;
llvm/include/llvm/ADT/ArrayRef.h:464:40: error: expected ‘;’ before ‘::’ token
  464 |       Other.template MutableArrayRef<T>::operator=(MutableArrayRef<T>());
      |                                        ^~
      |                                        ;

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g++ (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0

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This appears to be a GCC bug. Requesting guidance from @AaronBallman @erichkeane @zygoloid.

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Could we revert for now?

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@chapuni I dont think this is something that can be fixed in clang. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94799

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So, we should revert #92957 for now, unless excluding problematic host compilers would be agreed.

return *this;
}

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