aaron.ballman marked 7 inline comments as done.
aaron.ballman added inline comments.


================
Comment at: clang/include/clang/Basic/LangOptions.h:534
+  /// Returns true if implicit int is supported at all.
+  bool implicitIntEnabled() const { return !CPlusPlus && !C2x; }
+
----------------
cor3ntin wrote:
> erichkeane wrote:
> > aaron.ballman wrote:
> > > erichkeane wrote:
> > > > cor3ntin wrote:
> > > > > erichkeane wrote:
> > > > > > This name seems inverse of what you mean to me?  IDK if you're 
> > > > > > bike-shed-sniping me here, but:
> > > > > > 
> > > > > > `prohibitsImplicitInt` to be the reverse of above? It becomes 
> > > > > > SLIGHTLY ambiguous to me (in that we don't mean "the language 
> > > > > > standard prohibits", we mean "the compiler implementation 
> > > > > > prohibits"), but that can be fixed up with a comment.
> > > > > > 
> > > > > > If you want to keep the direction, perhaps `implicitIntPermitted`, 
> > > > > > at which point I might suggest the one above become 
> > > > > > `implicitIntRequired`.
> > > > > @erichkeane `requiresImplicitInt` is only used twice. Does it needs a 
> > > > > name?
> > > > > 
> > > > *shrug*, I tend to be of the feeling that if you have to say something 
> > > > this often, and functions are basically free, mind as well make one.
> > > The idea here is that `requiresImplicitInt()` tells you when the support 
> > > is mandatory per spec, and `implicitIntEnabled()` tells you when the 
> > > support is either mandatory or an extension. I'm not strongly tied to the 
> > > names, how do these sound?
> > > 
> > > `isImplicitIntRequired()` and `isImplicitIntAllowed()`?
> > > 
> > > (I could also add the word `Support` in there as in 
> > > `isImplicitIntSupportRequired()` but then the function names start to get 
> > > a bit longer than I think is reasonable.)
> > >> The idea here is that requiresImplicitInt() tells you when the support 
> > >> is mandatory per spec, and implicitIntEnabled() tells you when the 
> > >> support is either mandatory or an extension. I'm not strongly tied to 
> > >> the names, how do these sound?
> > 
> > Well, as it is now, the latter tells you whether 'it is allowed as an 
> > extension'.
> > 
> > 
> > >>`isImplicitIntRequired()` and `isImplicitIntAllowed()`?
> > 
> > These seem pretty clear to me.  I don't see 'Support' as being valuable.
> > 
> `implicitIntEnabled` makes sense to me. I guess my question is, is there 
> precedence for options for language-mandated features?
> I guess my question is, is there precedence for options for language-mandated 
> features?

Sure, though many of them also have user-facing command line flags to set the 
options. (wchar_t support, digraphs, etc)

I added these as helper functions mostly because there's no way to have 
language options whose default value is dependent on other language options.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D124258/new/

https://reviews.llvm.org/D124258

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