-betterC and extern(C++) classes
9il via Digitalmars-d
digitalmars-d at puremagic.com
Sun Sep 10 02:03:38 PDT 2017
On Sunday, 10 September 2017 at 08:56:11 UTC, rikki cattermole
> On 10/09/2017 9:40 AM, Yuxuan Shui wrote:
>> I was experimenting with -betterC and found out that C++
>> classes doesn't work. Because the resulting object file needs
>> a symbol "_D14TypeInfo_Class6__vtblZ" which is in druntime. I
>> suppose this is to support T.classinfo?
>> Could we remove T.classinfo and make classes work under
>> -betterC? Or is there some other reason preventing this from
> Definitely not.
> Classes require vtable's to work. Vtables are generated as part
> of TypeInfo. No TypeInfo, no classes, simple to understand.
No. vtables can be generated without RTTI and we can have both D
and C++ classes in betterC mode. It may not be ready now, but it
is definitely possible and should be supported.
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