[cfe-dev] std::is_trivial_default_constructible<T>, what's required?!

[Gabriel Charette via cfe-dev]

Ah ah! Had missed that. That's unfortunate :(

Thanks

On Thu, Jan 25, 2018 at 1:44 PM Furkan Usta <furkanusta17 at gmail.com> wrote:

> > A default constructor is trivial if it is not user-provided and if ... no
> non-static data member of its class has a default member initializer ...
>
> http://eel.is/c++draft/class.ctor#6.2
>
> 2018-01-25 15:11 GMT+03:00 Gabriel Charette via cfe-dev <
> cfe-dev at lists.llvm.org>:
>
>> Hello Clang/C++ experts!
>>
>> I'm confused on what it takes to be std::is_trivial_default_constructible?
>>
>> This doesn't even compile (leaving x_ uninitialized compiles but I don't
>> see why it's not trivial to initialize a POD member inline):
>>
>> class Test {
>>  public:
>>   int x_ = 0;
>> };
>>
>> static_assert(std::is_trivially_default_constructible<Test>::value, "");
>>
>> -> error: static_assert failed due to requirement
>> 'std::is_trivially_default_constructible<Test>::value' ""
>>
>> I also tried making a constexpr Test() = default; constructor but I can't
>> get anything with POD members initialized inline to pass the
>> std::is_trivially_default_constructible test...?!
>>
>> Thanks!
>> Gab
>>
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>>
>
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