[PATCH] Remove 'explicit' keyword from constructors with multiple (non-default) arguments.

Alexander Kornienko alexfh at google.com
Mon Jun 23 04:47:18 PDT 2014

+Matt, who requested this feature.

On Sun, Jun 22, 2014 at 9:13 AM, James Dennett <jdennett at googlers.com>

> On Sun, Jun 22, 2014 at 3:00 AM, David Blaikie <dblaikie at gmail.com> wrote:
>> Fwiw, if I'm not mistaken, explicit on more - than - one - arg actors does
>> have some meaning in c++11. It means you can't construct from a braced
>> init
>> list.
> IIRC: More specifically, you can't use copy-list-initialization; direct
> initialization from a braced init list is allowed for an explicit
> constructor.
> The essence is that it takes some thought before removing explicit from a
> constructor, more so than in C++98.

Thanks for noting. This may be an interesting argument in whether we should
remove "explicit" on multiple-argument constructors or not. I'm not sure
though, how useful the ability to disallow direct initialization from a
braced init list is. It's rather obvious what harm can an implicit call to
a single-argument constructor cause, but with braced init lists a mistake
is much less likely, imo.

Matt, what do you think about this?
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