At

https://github.com/nordlow/justd/blob/master/containers_ex.d

I want to benchmark Economic Modelings container packages.

Specifically HashSet with different allocators.

But when I try to use `LocalAllocator` defined as

    alias LocalAllocator = InSituRegion!(n, T.alignof);

at

https://github.com/nordlow/justd/blob/master/containers_ex.d#L59

in call to `hashSet`

    auto hx = iota!T(0, n).hashSet; // TODO Use LocalAllocator


https://github.com/nordlow/justd/blob/master/containers_ex.d#L60

it errors as:

containers_ex.d(17,38): Error: constructor containers.hashset.HashSet!(int, InSituRegion!(1048576LU, 4LU), generateHash, false).HashSet.this is not callable because it is annotated with @disable
/home/per/Work/justd/containers/hashset.d(366,20): Error: struct std.experimental.allocator.building_blocks.region.InSituRegion!(1048576LU, 4LU).InSituRegion is not copyable because it is annotated with @disable
/home/per/opt/x86_64-unknown-linux-gnu/dlang/linux/bin64/src/phobos/std/conv.d(4096,13): Error: static assert  "Bucket cannot be emplaced from (InSituRegion!(1048576LU, 4LU))."
/home/per/opt/x86_64-unknown-linux-gnu/dlang/linux/bin64/src/phobos/std/conv.d(4161,18):        instantiated from here: emplaceImpl!(InSituRegion!(1048576LU, 4LU))
/home/per/Work/justd/containers/hashset.d(293,19):        instantiated from here: emplace!(Bucket, InSituRegion!(1048576LU, 4LU))
containers_ex.d(17,16):        instantiated from here: HashSet!(int, InSituRegion!(1048576LU, 4LU), generateHash, false)
containers_ex.d(60,31):        instantiated from here: hashSet!(InSituRegion!(1048576LU, 4LU), Result)

Comint exited abnormally with code 1 at Thu Oct 22 13:55:25

What's wrong?

On Thursday, 22 October 2015 at 11:55:39 UTC, Nordlöw wrote:
> https://github.com/nordlow/justd/blob/master/containers_ex.d

The current GitHub of containers_ex.d (using dmd git master) version works if justd repo is cloned recursively.

On Thu, 22 Oct 2015 11:55:37 +0000, Nordlöw wrote:

> What's wrong?

HashSet has a disabled default constructor; you need to supply the allocator instance to the constructor here https://github.com/nordlow/ justd/blob/master/containers_ex.d#L17

On Thursday, 22 October 2015 at 17:32:34 UTC, Justin Whear wrote:
> On Thu, 22 Oct 2015 11:55:37 +0000, Nordlöw wrote:
>
>> What's wrong?
>
> HashSet has a disabled default constructor; you need to supply the allocator instance to the constructor here https://github.com/nordlow/ justd/blob/master/containers_ex.d#L17

Doesn't work.

If I change

    auto set = HashSet!(E, Allocator)();

to

    auto set = HashSet!(E, Allocator)(Allocator());

it errors as

containers_ex.d(17,38): Error: constructor containers.hashset.HashSet!(const(int), Mallocator, generateHash, false).HashSet.this (ulong bucketCount) is not callable using argument types (Mallocator)
containers_ex.d(30,16): Error: template instance containers_ex.hashSet!(Mallocator, const(int)[]) error instantiating
containers_ex.d(35,5): Error: static assert  (is(typeof(__error) == const(int)*)) is false

My existing call to

    auto set = HashSet!(E, Allocator)();

works for Mallocator as in

https://github.com/nordlow/justd/blob/master/containers_ex.d#L17

but not for

    InSituRegion!(1024*1024, T.alignof)

Why? Please, help.

On Thu, 22 Oct 2015 19:41:08 +0000, Nordlöw wrote:

> My existing call to
> 
>      auto set = HashSet!(E, Allocator)();
> 
> works for Mallocator as in
> 
> https://github.com/nordlow/justd/blob/master/containers_ex.d#L17
> 
> but not for
> 
>      InSituRegion!(1024*1024, T.alignof)
> 
> Why? Please, help.

The HashSet defines different constructors based on the nature of tha allocator: https://github.com/economicmodeling/containers/blob/master/src/containers/hashset.d#L30

Specifically, if the allocator has zero state (like Mallocator), you do not pass an instance.  If the allocator does have state, like InSituRegion, you need to pass an instance to the container's constructor.

On Thursday, 22 October 2015 at 11:57:37 UTC, Nordlöw wrote:
> On Thursday, 22 October 2015 at 11:55:39 UTC, Nordlöw wrote:
>> https://github.com/nordlow/justd/blob/master/containers_ex.d
>
> The current GitHub of containers_ex.d (using dmd git master) version works if justd repo is cloned recursively.

I updated

https://github.com/nordlow/justd/blob/master/containers_ex.d

as you say but now it errors as

/home/per/Work/justd/containers/hashset.d(46,19): Error: struct std.experimental.allocator.building_blocks.region.InSituRegion!(1048576LU, 4LU).InSituRegion is not copyable because it is annotated with @disable
/home/per/Work/justd/containers/hashset.d(42,11): Error: incompatible types for ((allocator) !is (null)): 'InSituRegion!(1048576LU, 4LU)' and 'typeof(null)'
/home/per/Work/justd/containers/hashset.d(366,20): Error: struct std.experimental.allocator.building_blocks.region.InSituRegion!(1048576LU, 4LU).InSituRegion is not copyable because it is annotated with @disable
/home/per/opt/x86_64-unknown-linux-gnu/dlang/linux/bin64/src/phobos/std/conv.d(4096,13): Error: static assert  "Bucket cannot be emplaced from (InSituRegion!(1048576LU, 4LU))."
/home/per/opt/x86_64-unknown-linux-gnu/dlang/linux/bin64/src/phobos/std/conv.d(4161,18):        instantiated from here: emplaceImpl!(InSituRegion!(1048576LU, 4LU))
/home/per/Work/justd/containers/hashset.d(293,19):        instantiated from here: emplace!(Bucket, InSituRegion!(1048576LU, 4LU))
containers_ex.d(34,24):        instantiated from here: HashSet!(int, InSituRegion!(1048576LU, 4LU), generateHash, false)
containers_ex.d(82,31):        instantiated from here: hashSet!(InSituRegion!(1048576LU, 4LU), Result)

Can't I use InSituRegion in this way?

On Thursday, 22 October 2015 at 22:06:47 UTC, Nordlöw wrote:
> Can't I use InSituRegion in this way?

No.

InSituRegion is not copyable. Try creating a `HashSet!(InSituRegion*)` instead.