[BUG]: cuda::std::extents::static_extent truncates cuda::std::dynamic_extent when index_type is unsigned int

[pciolkosz]

Is this a duplicate?

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Type of Bug

Compile-time Error

Component

libcu++

Describe the bug

It seems that when index_type in cuda::std::extents is unsigned int then dynamic extents are truncated to a smaller type. It works correctly if index_type is int, not sure about other types.

How to Reproduce

#include <cuda/std/type_traits>
#include <cuda/std/mdspan>

int main()
{
    cuda::std::extents<unsigned int, cuda::std::dynamic_extent> e_unsigned(1); 
    cuda::std::extents<int, cuda::std::dynamic_extent> e_signed(1); 

    static_assert(cuda::std::is_same_v<decltype(e_unsigned.static_extent(0)), decltype(e_signed.static_extent(0))>);
    static_assert(e_unsigned.static_extent(0) == e_signed.static_extent(0));
    static_assert(e_unsigned.static_extent(0) == cuda::std::dynamic_extent);
    static_assert(e_signed.static_extent(0) == cuda::std::dynamic_extent);

}

Expected behavior

cuda::std::extents::static_extent should return cuda::std::dynamic_extent for dynamic extents regardless of what index_type is

Reproduction link

https://godbolt.org/#z: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%2Bh5fxkBTKgMTlCFvCoIlxDEHgWDTaiTTxUkDgMM4rj1Ho/iBJ0BTdI0mSJAIAwNBk8TXQwoxdEU202C0fS1IdgxveUrQ1M952vcM/TfXdIPtKdYwXVMaGzPMkzsRwoGkOBkHQRwWzBLVThOFs6kpisKZcFsEC4IQJA7Kssq8Lh3m5qQRHAcTXgMQxFFcBiwEURRDEAGzMWxQEcJxqPcRjfECUJ9OkKJiAgDMBAxOlsm%2BqgknScQwShpw2BDgA4qTZJXGtrlVLQWxxVVO0CBMvB2hTa0BlpshdeIvWyIoKjqNFw2kI19wxBVSMo2jS2cNZ6XKwiqBUFjON4wTRMkxALga4pVPUXb0taAzRFeBRKYMSsGIYnzHO8wxBesULHFcdFEuWFLdO57LMDy1gYYCpgqvyZr2tsJw2O4/jXiE8TYVdwjHD2/gRBO3ofVuz10h9V7g2%2Bz0pQ2548b7bdx37YD4yXQ95QH6fWRJMfF2/R9bQX3fAj/ZDeQvT0n2PxDN9FFMdyYJgdaAlAIgXrujTgQ5MBTz%2BPVJqkR44jyTsTUm5N56Z0aFsNOCl4FYWzi3fCjMJBEz5lIDQXhgJswYhoFiGINArCRqLMOPEZ5N0EvghmwsvBgPDiw9hUwVoJHsJIIAA%3D%3D

Operating System

No response

nvidia-smi output

No response

NVCC version

No response