aaron.ballman added a comment.

In D69560#2487093 <https://reviews.llvm.org/D69560#2487093>, @whisperity wrote:

> I have posted two questions to GitHub, mostly related to the guideline rule 
> and how free the implementation could be: #1732 
> <http://github.com/isocpp/CppCoreGuidelines/issues/1732> and #1733 
> <http://github.com/isocpp/CppCoreGuidelines/issues/1733>, I think I tagged 
> you on both.
>
> However, if we are going down the alias route, I think it should be the 
> guideline version which is the alias, and this check should live under a 
> different name. Where do you think should we put it? I think `bugprone-` is 
> the best fit, and `readability-` is the second-best...

I think `bugprone` is where it should ideally live, but if we still think we 
have "too high" of a false positive rate (for however we decide we want to 
measure that), then `readability` is a good fallback. (I'm assuming more people 
enable `bugprone-*` than enable `readability-*`.)

> The "avoid adjacent parameter of similar types" name could stay... or 
> something like `...-easily-swappable-function-parameters`, that involves all 
> the features here, with things like "default length 3" and such, 
> "relatedness" heuristics turned on.

Hmm, how about `bugprone-easily-swappable-parameters`? We can drop the 
`function` from it because we probably also care about function-like things 
(like lambdas and blocks) and `parameters` should be sufficiently clear as to 
what's getting checked.

> Not sure what CVR-modelling's default should be... it finds less when "off", 
> but too easily silences crucial issues (such as `memcpy(T*, const T*)`).

My instinct is that if you accidentally swap a qualified parameter you'll get 
some other diagnostic about dropped qualifiers and so perhaps the default 
should be `off`, but perhaps there's something I'm not thinking of there.


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