Re: [boost] [Boost.Test] Custom DataSet compiler error with no match for »operator^

Subject: Re: [boost] [Boost.Test] Custom DataSet compiler error with no match for »operator^
From: Raffi Enficiaud (raffi.enficiaud_at_[hidden])
Date: 2017-03-29 07:04:06

Le 29/03/2017 à 07:33, Olaf Peter via Boost a écrit :
>
>> On 03/28/2017 01:38 PM, Olaf Peter via Boost wrote:
>>>
>>> I run into a compile problem with [Boost.Test] DataSet. I can reduce it
>>> by re-using the example provided by the docs:
>>>
>>> http://www.boost.org/doc/libs/1_62_0/libs/test/doc/html/boost_test/tests_organization/test_cases/test_case_generation/datasets.html#boost_test.tests_organization.test_cases.test_case_generation.datasets.example_descr
>>>
>>>
>>> <snip>
>>>     fibonacci_dataset()  ^  fibonacci_dataset(),
>>> <snip>
>>>
>>>  error: no match for 'operator^' (operand types are
>>> 'boost::unit_test::data::result_of::make<fibonacci_dataset>::type {aka
>>> fibonacci_dataset}' and 'fibonacci_dataset')
>>>      fibonacci_dataset() ^ fibonacci_dataset(),
>>>
>>> My use case has to load input and expect files provides by two datasets.
>>> How to fix it?
>>>
>>
>> Bring the operator into scope:
>>
>> using bdata::monomorphic::operator^;
>>
>> This would normally be found by ADL, if either of the
>> datasets is from Boost.Test.
>
> Thank you Steven, this works (at last for fibonacci_dataset(), at home
> probably too, but I can't test it locally).
>

Please note that with this example, you are combining several datasets 
and none of them has a finite size: it will yield a runtime error.

Best,
Raffi