---
id: pr-cccl-cub-8456
repo: NVIDIA/cccl
pr: 8456
title: modernize-type-traits
author: Jacobfaib
date: '2026-04-16'
url: https://github.com/NVIDIA/cccl/pull/8456
source_category: upstream-code
architectures:
- sm100
tags:
- block
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 19cc58b9c9e6e549e58a51e202df4467360ccf26
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- .clang-tidy
- c/parallel/test/test_histogram.cpp
- cub/test/catch2_test_device_scan.cu
- cub/test/catch2_test_device_scan_by_key.cu
- libcudacxx/include/cuda/__algorithm/copy.h
- libcudacxx/include/cuda/__stream/launch_transform.h
- libcudacxx/include/cuda/std/__tuple_dir/tuple.h
- libcudacxx/include/cuda/std/__type_traits/is_callable.h
- thrust/testing/is_contiguous_iterator.cu
- thrust/testing/pair.cu
- thrust/testing/unittest/testframework.h
- thrust/testing/universal_memory.cu
- thrust/thrust/allocate_unique.h
- thrust/thrust/detail/reference.h
artifact_dir: evidence/pull-bundles/cccl-cub/gh-8456
head_ref_oid: 48ae53daee3ffa6db5e695c559512b8e5e6b6333
---
# modernize-type-traits

- Repository: `NVIDIA/cccl`
- PR: [8456](https://github.com/NVIDIA/cccl/pull/8456)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `.clang-tidy`
- `c/parallel/test/test_histogram.cpp`
- `cub/test/catch2_test_device_scan.cu`
- `cub/test/catch2_test_device_scan_by_key.cu`
- `libcudacxx/include/cuda/__algorithm/copy.h`
- `libcudacxx/include/cuda/__stream/launch_transform.h`
- `libcudacxx/include/cuda/std/__tuple_dir/tuple.h`
- `libcudacxx/include/cuda/std/__type_traits/is_callable.h`
- `thrust/testing/is_contiguous_iterator.cu`
- `thrust/testing/pair.cu`
- `thrust/testing/unittest/testframework.h`
- `thrust/testing/universal_memory.cu`
- `thrust/thrust/allocate_unique.h`
- `thrust/thrust/detail/reference.h`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-8456`
