K&R-style variadic functions

[Regan Heath]

On Tue, 17 Jul 2012 20:42:09 +0100, Jacob Carlborg <doob at me.com> wrote:

> On 2012-07-17 17:13, Regan Heath wrote:
>
>> Is Clang open source, can we see the code for that function?  Perhaps
>> it's a bug.. ANSI C may have made () without "void" obsolete, but no
>> compiler I've ever used has actually enforced that - or perhaps C++ made
>> old-style function definition/declarations obsolete and allowed () back
>> again.
>
> Sure:
>
> https://llvm.org/svn/llvm-project/cfe/trunk/tools/libclang/CXType.cpp
>
> Just search for clang_isFunctionTypeVariadic.

It certainly seems intentional:

   if (T->getAs<FunctionNoProtoType>())
     return 1;

I wonder if it's a case of "we can't be certain, so lets assume it is" or  
similar.

R

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