Re: Fixed String review

From: Peter Dimov (pdimov_at_[hidden])
Date: 2019-11-27 00:24:38

Gavin Lambert wrote:
> On 27/11/2019 06:46, Peter Dimov wrote:
> > Vinnie Falco wrote:
> >
> >> In which use-cases do you anticipate the need for a constexpr 
> >> static_string?
> >
> > When manipulating strings at compile time? Such as s1 += s2?
>
> Wouldn't that use case be better served with an immutable string and 
> operator+?

Not in general.

constexpr string_view f( int x );

constexpr auto g( int n )
{
    fixed_string<512> s;

    for( int i = 0; i < n; ++i )
    {
        s += f( i );
    }

    return s;
}

You can rewrite this specific example using recursion but in general, it'd 
be painful and unreadable.