[libcu++] Fix use of exception keywords

[davebayer]

Replace them with our exception macros instead.

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 2a82ae1 and 0de172c.

📒 Files selected for processing (2)

• libcudacxx/include/cuda/std/__pstl/cuda/copy_if.h
• libcudacxx/include/cuda/std/__pstl/cuda/sort.h

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Standardized exception-handling implementation in CUDA parallel algorithms to use project-standard macros for consistency and maintainability. No functional changes or API alterations.

Walkthrough

Two PSTL algorithm dispatch headers replace raw exception-handling statements with project-standard macros. copy_if replaces throw; with _CCCL_RETHROW;, and sort converts its try/catch block to use _CCCL_TRY, _CCCL_CATCH, and _CCCL_CATCH_FALLTHROUGH while preserving the original memory-allocation and error-rethrow semantics.

Changes

Exception handling macro standardization

Layer / File(s)	Summary
copy_if exception rethrow standardization libcudacxx/include/cuda/std/__pstl/cuda/copy_if.h	Non-memory-allocation errors in the copy_if dispatch rethrow via _CCCL_RETHROW macro instead of bare throw;.
sort exception handling macro conversion libcudacxx/include/cuda/std/__pstl/cuda/sort.h	sort dispatch operator() replaces native try/catch structure with _CCCL_TRY, _CCCL_CATCH, and _CCCL_CATCH_FALLTHROUGH macros. Memory allocation errors continue to map to std::bad_alloc; other cuda_error cases rethrow via _CCCL_RETHROW.

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[github-actions]

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[github-actions]

Successfully created backport PR for branch/3.4.x:

• [Backport branch/3.4.x] [libcu++] Fix use of exception keywords #9228