>
> No existing code uses "default:" for marking the default enum value
> because currently this syntax is invalid. So this is not a breaking change.

Before this proposal:
ExternalLibrary::Enum e{}; // e == 0

After this proposal (and ExternalLibrary update):
ExternalLibrary::Enum e{}; // e == some default value


On Fri, Mar 24, 2023 at 5:17 PM Andrey Semashev via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> On 3/24/23 18:05, Oleksandr Koval via Std-Proposals wrote:
> > Actually, allowing default values can break
> > existing code because right now `Enum e{};` always means e = 0, after
> > your change the value will be different.
>
> No existing code uses "default:" for marking the default enum value
> because currently this syntax is invalid. So this is not a breaking change.
>
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>

-- 
Regards,
Oleksandr Koval.