Re: [boost] [language] determine sence of language proposal concerning the 'default'-keyword

Subject: Re: [boost] [language] determine sence of language proposal concerning the 'default'-keyword
From: Gavin Lambert (gavinl_at_[hidden])
Date: 2015-04-08 19:22:07

On 9/04/2015 09:31, Jakob Riedle wrote:
> since this seems to me kind of a proving ground for new C++
> library/language features I'd ask this question here.
>
> Would you recon' writing a language proposal about:
>
> using the 'default'-keyword as some standard way of calling the
> default ctor of variables.
>
> I could imagine the following use-case:
>
> void foo( some::very_long_name<some_very_long_template_param> arg = default ){
>       return;
> }
>
> This would make things shorter, in the way 'auto' does it for types.

This may be a bikeshed, but why not use auto()?

This would retain "auto" as "infer the appropriate type here" and "()" 
as "invoke with no parameters", together implying a constructor call. 
And it avoids overloading yet another keyword.

It would have to de-reference intelligently when determining the 
constructor to call, though.

Although ultimately if you're mostly concerned about typing long names, 
then typedef is your friend.