Catch::Generators::from_range cannot be used with C array

[mjerabek]

Describe the bug
Using Catch::Generators::from_range with plain array fails: type 'T *[6]' cannot be used prior to '::' because it has no members. That's because the function is defined with typename ResultType = typename Container::value_type .

I think the simplest solution without ADL/non-ADL begin(c) is to add a direct specialization for arrays.

Expected behavior
... It works.

Reproduction steps
https://godbolt.org/z/6r6Gh4M18

Platform information:
Not relevant.

[mjerabek]

I imagine something like this could do:

namespace Catch::Generators {
template <typename T, size_t N>
GeneratorWrapper<T> from_range(T const (&cnt)[N]) {
    return GeneratorWrapper<T>(Catch::Detail::make_unique<IteratorGenerator<T>>(cnt, cnt+N));
}    
}