C++ PATCH for DR 1518 (c++/54835, c++/60417)

Ville Voutilainen ville.voutilainen@gmail.com
Mon Oct 26 01:13:00 GMT 2015


On 25 October 2015 at 22:15, Ville Voutilainen
<ville.voutilainen@gmail.com> wrote:
> It seems to me that there's a discrepancy in handling explicit
> default constructors. Based on my tests, this works:
>
> struct X {explicit X() {}};
>
> void f(X) {}
>
> int main()
> {
>     f({});
> }
>
> However, if the explicit constructor is defaulted, gcc accepts the code:
>
> struct X {explicit X() = default;};
>
> void f(X) {}
>
> int main()
> {
>     f({});
> }

And to clarify, I'd expect both of those snippets to be rejected, but only the
former is.



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