[PATCH] D135177: [clang] adds `__is_scoped_enum`, `__is_nullptr`, and `__is_referenceable`

[Aaron Ballman via Phabricator via cfe-commits]

aaron.ballman added inline comments.


================
Comment at: clang/test/SemaCXX/type-traits.cpp:822
+
+  { int a[F(__is_referenceable(void))]; }
+}
----------------
aaron.ballman wrote:
> I think we should have test cases for the following:
> ```
> struct incomplete;
> 
> __is_referenceable(struct incomplete); // Also interesting to make sure we handle elaborated type specifiers properly
> 
> typedef void function_type(int);
> __is_referenceable(function_type); // Note, this is not a function *pointer* type
> 
> struct S {
>   void func1() &;
>   void func2() const;
> };
> 
> // Both of these should be false, by my understanding of what "referenceable" means in the standard.
> __is_referenceable(decltype(&S::func1));
> __is_referenceable(decltype(&S::func2));
> ```
Do you have a test for:
```
struct S {
  void func1() &;
  void func2() const;
};

// Both of these should be false, by my understanding of what "referenceable" means in the standard.
__is_referenceable(decltype(&S::func1));
__is_referenceable(decltype(&S::func2));
```



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https://reviews.llvm.org/D135177