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fix: guard size_t template specializations for Win64#183

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thatdudegrantt:fix/matlab-size_t-win64-duplicate
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fix: guard size_t template specializations for Win64#183
thatdudegrantt wants to merge 1 commit into
borglab:masterfrom
thatdudegrantt:fix/matlab-size_t-win64-duplicate

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On 64-bit Windows, size_t and uint64_t are the same underlying type, causing duplicate explicit template specialization errors when building the MATLAB wrapper. Guard both wrap<size_t> and unwrap<size_t> with #if !defined(_WIN64) || defined(CUDACC).

this is because gtsam/wrap inherits from the wrap repository as a snapshot copy, syncing using update_wrap.sh. (which wouldve overwritten a solution in the gtsam/wrap/matlab.h.

Successfully locally tested the change in gtsam/wrap/matlab.h, and then migrating to truly make the change. I will be more careful about this in the future.

fixes borglab/gtsam#2505

On 64-bit Windows, size_t and uint64_t are the same underlying type, causing duplicate explicit template specialization errors when building
the MATLAB wrapper. Guard both wrap<size_t> and unwrap<size_t> with
#if !defined(_WIN64) || defined(__CUDACC__).

this is because gtsam/wrap inherits from the wrap repository.

Successfully locally tested the change in gtsam/wrap/matlab.h, and then migrating to truly make the change. I will be more careful about this in the future.
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Pull request overview

This PR addresses a Win64 build failure in the MATLAB wrapper caused by duplicate explicit template specializations when size_t and uint64_t resolve to the same underlying type.

Changes:

  • Conditionally compiles the wrap<size_t> specialization to avoid conflicts on 64-bit Windows.
  • Conditionally compiles the unwrap<size_t> specialization to avoid conflicts on 64-bit Windows.

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Comment thread matlab.h
}

// specialization to size_t
// specialization to size_t but skip Win64 size check & CUDACC check
Comment thread matlab.h
}

// specialization to size_t
// specialization to size_t but skip Win64 size check (size_t == uint64_t) & CUDACC check
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Duplicate template instantiation with Matlab wrappers under x64

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