How to initialize immutable variables with an expression that throws an exception to catch?

[Steven Schveighoffer]

On 4/3/20 9:14 AM, FeepingCreature wrote:
> On Friday, 3 April 2020 at 12:49:27 UTC, Steven Schveighoffer wrote:
>> Do it the old-fashioned way -- use casting ;)
>>
>> S s_val = void;
>> try
>>   s_val = fun();
>> catch (Exception)
>>   return;
>>
>> immutable s = s_val.assumeUnique;
>> call(s);
>>
> 
> Doesn't work - `immutable struct` means S is always immutable.

totally misread your statement as making s immutable, not S.

I don't know how to solve that problem correctly.

-Steve