std.experimental.alloctor does not work with non default constructible types

[Andrei Alexandrescu via Digitalmars-d]

On 6/3/16 7:57 AM, maik klein wrote:
> On Friday, 3 June 2016 at 11:52:52 UTC, Andrei Alexandrescu wrote:
>> On 6/3/16 7:47 AM, maik klein wrote:
>>> I rely a lot on std.experimental.alloctor for my "game engine". I have
>>> just finished creating my own version for "Algebraic" and I want to
>>> disable to default construction as it would make no sense.
>>>
>>> I have also created my own containers, the problem is that I can not use
>>> my version of "Algebraic" in any of my containers because all of them
>>> are using std.experimental.alloctor.makeArray which can not be used with
>>> non default constructible types.
>>>
>>> While I don't want to have any default constructed type of Algebraic, I
>>> really don't care for uninitialized values that I will never use anyway.
>>>
>>> I am sure there is a workaround with unions but it would be nice if
>>> makeArray/expandArray would just support non default constructible
>>> types.
>>>
>>> Thoughts?
>>
>> Looks like a bug. Do you have a short repro? -- Andrei
>
> import std.experimental.allocator;
> struct Foo{
>      @disable this();
> }
> auto foos = theAllocator.makeArray!Foo(100);
>
> Error messsage:
>
> ../../.dub/packages/experimental_allocator-2.70.0-b1/src/std/experimental/allocator/package.d(576,34):
> Error: variable
> std.experimental.allocator.uninitializedFillDefault!(Foo).uninitializedFillDefault.t
> default construction is disabled for type immutable(Foo)
> ../../.dub/packages/experimental_allocator-2.70.0-b1/src/std/experimental/allocator/package.d(612,36):
> Error: template instance
> std.experimental.allocator.uninitializedFillDefault!(Foo) error
> instantiating
> source/breeze/util/algebraic.d(91,43):        instantiated from here:
> makeArray!(Foo, IAllocator)

That should be fixable, please submit to bugzilla. Thanks! -- Andrei