[libcxx-dev] could you plz answer my question about __is_trivially_constructible(Tp) in type_traits header file

[李苏旺 via libcxx-dev]

Thanks a lot!  I got , the definition is in compiler

JF Bastien <jfbastien at apple.com> 于2019年1月24日周四 上午1:21写道：

> It’s a compiler builtin, implemented here:
> https://github.com/llvm/llvm-project/blob/2946cd701067404b99c39fb29dc9c74bd7193eb3/clang/lib/Sema/SemaExprCXX.cpp#L4913
>
>
> On Jan 23, 2019, at 1:18 AM, 李苏旺 via libcxx-dev <libcxx-dev at lists.llvm.org>
> wrote:
>
> hi man , With all due respect I saw you have ever committed some code to
> LLVM project)(
> https://github.com/llvm-mirror/libcxx/blob/master/include/type_traits) ,
> I am reading the source code about meta-programming in the file -
> type_traits in the line number 3445 , "__is_trivially_constructible<...>"
> is curious to me , but I can not find the definition of the value , could
> you please tell where I can find the definition about
> __is_trivially_constructible ? template <class _Tp, class... _Args> struct
> _LIBCPP_TEMPLATE_VIS is_trivially_constructible : integral_constant<bool,
> __is_trivially_constructible(_Tp, _Args...)> { }; similarly, if I can
> understand the meaning of "__is_trivially_constructible" , I can understand
> __is_trivial ,__is_trivially_copyable , etc thank you in advance .
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