malcolm.parsons added inline comments.

================
Comment at: clang-tidy/modernize/UseEqualsDeleteCheck.cpp:29
+            cxxMethodDecl(
+                anyOf(isCopyAssignmentOperator(), isMoveAssignmentOperator())),
+            cxxDestructorDecl()));
----------------
aaron.ballman wrote:
> How about a conversion operator, like `operator bool()`? You'll sometimes see 
> that one declared privately for similar reasons.
I haven't seen that. Do you have an example?


================
Comment at: clang-tidy/modernize/UseEqualsDeleteCheck.cpp:52
+  diag(SpecialFunction->getLocation(),
+       "use '= delete' to prevent a default special member function")
+      << FixItHint::CreateInsertion(EndLoc, " = delete");
----------------
aaron.ballman wrote:
> This diagnostic isn't very clear to me -- what does it mean to "prevent" a 
> default special member function?
> 
> The fixit for this is also somewhat unsatisfying as this takes a private, 
> not-defined function and turns it into a private, deleted function. That's a 
> very small win, because it only impacts code which could access the special 
> member function in the first place (some compilers give a diagnostic about 
> the special member function being inaccessible even if it's explicitly marked 
> as deleted; clang is not one such compiler). Do we have a way to rewrite the 
> access specifier for the special member function as well (kind of like how we 
> have a way to handle includes we're adding)? I am guessing not yet, but if we 
> do, that would be fantastic to use here.
> 
> Note, I don't think this should hold up your patch or the fixit. A small win 
> is still a win. :-)
Do you have a better wording for the diagnostic?

I don't see any utility functions to make a method public.


https://reviews.llvm.org/D26138



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