Generating struct .init at run time?

kinke noone at
Thu Jul 2 16:51:52 UTC 2020

On Thursday, 2 July 2020 at 15:20:23 UTC, Ali Çehreli wrote:
> According to its date, it was written when I was working for 
> Weka. Apparently, ldc took care of it for them after all.

If so, then without them posting any issue beforehand or giving 
any feedback afterwards.

> > For recent LDC versions, the 'solution' is to (statically)
> initialize
> > the array with zeros, as fully zero-initialized structs don't
> feature
> > any explicit .init symbols anymore.
> What about floating point and char types? Their .init values 
> are not all zeros in D spec. (I don't think this matters in my 
> case but still.)

That's why all you have to do, in order not to have recent LDC 
emit the struct's init symbol, is to initialize these members 
manually with zeros:

struct S { double[elementCount] a = 0; }
void foo() { S s; } // compiler does a memset

`= void` for members doesn't work and, I dare say, not work 
anytime soon if ever.

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