[llvm-dev] typedef or using in C++ code

[Piotr Padlewski via llvm-dev]

2016-09-07 17:40 GMT-07:00 Mehdi Amini via llvm-dev <llvm-dev at lists.llvm.org
>:

>
> > On Sep 7, 2016, at 4:50 PM, Joerg Sonnenberger via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >
> > On Wed, Sep 07, 2016 at 04:30:01PM -0700, Eugene Zelenko via llvm-dev
> wrote:
> >> What should be used for type declarations: typedef or using? typedef
> >> is there because of historical reasons, but LLVM code based is C++11
> >> now.
> >>
> >> LLVM Coding Standards are not clear on this matter.
> >
> > Can you give some context for the situation you wonder about? They are
> > both valid in some situation.
>
> Are there cases were typedef is (technically) preferable (or needed)
> compared to using?
>
> You cant write

template <typename T>
using myVector = vector<T>;

with typedef. But this case is very rare. I prefer to use using always
because IMHO it is cleaner which part is the alias and which is aliasee (if
there is word like this).

Piotr
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