openPMD / openPMD-api / 2285

85%

dev: 83%

Pull #568

travis-ci

ADIOS2 VariableDefiner: Fix OSX Cast Error

Add an explicit cast from `openPMD::Extent`
(aka `std::vector< std::uint64_t >`) to `adios2::Dims`
(aka `std::vector< std::size_t >`) to avoid a compile error on
OSX:

```
include/openPMD/Datatype.hpp:558:23: error: no matching member function for call to 'operator()'
        return action.OPENPMD_TEMPLATE_OPERATOR( )< char >(
               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

include/openPMD/Datatype.hpp:532:44: note: expanded from macro 'OPENPMD_TEMPLATE_OPERATOR'
                                           ^

src/IO/ADIOS/ADIOS2IOHandler.cpp:201:9: note: in instantiation of function template specialization 'openPMD::switchType<void, openPMD::detail::VariableDefiner, adios2::IO &, std::__1::basic_string<char> &, std::__1::unique_ptr<adios2::Operator, std::__1::default_delete<adios2::Operator> >, const std::__1::vector<unsigned long long, std::__1::allocator<unsigned long long> > &>' requested here
        switchType( parameters.dtype, detail::VariableDefiner( ),
        ^

src/IO/ADIOS/ADIOS2IOHandler.cpp:794:5: note: candidate function not viable: no known conversion from 'const vector<unsigned long long, allocator<unsigned long long>>' to 'const vector<size_t, allocator<unsigned long>>' for 4th argument
    operator( )( adios2::IO & IO, const std::string & name,
    ^

src/IO/ADIOS/ADIOS2IOHandler.cpp:804:27: note: candidate template ignored: invalid explicitly-specified argument for template parameter 'n'
    void VariableDefiner::operator( )( adios2::IO &, Params &&... )
```

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