On Monday, 6 August 2018 at 18:28:11 UTC, Steven Schveighoffer
wrote:
On 8/6/18 2:22 PM, vit wrote:
Hello,
I have this struct:
struct S{
uint kind;
void[N] data_;
define "N"
}
Instances of struct S are allocated by standard GC new and
S.data_ can contain pointers/ranges to GC allocated data.
If is GC disabled then program run fine. But when is GC
enabled then it fail randomly.
how does it fail?
-Steve
private auto sizeOf(T)(){return T.sizeof;}
struct ExprImpl(Ts...){
enum N = max(staticMap!(sizeOf, Ts));
invariant(kind_ != 0);
uint kind_ = 0;
void[N] data_;
this(T)(auto ref T x){/+emplace T to data_ and change kind_
to something != 0+/}
}
Ts == structs
data change without triggering invariant after allocation in
other part of program.
