implement C++26 `std::span`'s constructor from `std::initializer_list` #2923

davebayer · 2024-11-21T09:44:22Z

Implementation of P2447R6 "std::span over an initializer list" from C++26 which is made available back to C++14.

As the paper says, this is a breaking change. For more info see chapter 4 - Breaking changes. Because of the backport, there could be potential problems for user's coming from std::span to cuda::std::span before C++26.

copy-pr-bot · 2024-11-21T09:44:26Z

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libcudacxx/include/cuda/std/detail/libcxx/include/span

libcudacxx/test/libcudacxx/std/containers/views/views.span/span.cons/initializer_list.pass.cpp

miscco · 2024-11-21T11:09:13Z

pre-commit.ci autofix

miscco · 2024-11-21T15:02:19Z

/ok to test

miscco · 2024-11-22T07:34:37Z

/ok to test

miscco · 2024-11-22T10:21:48Z

scratch my last comment, the constructor with dynamic extent is non explicit

miscco · 2024-11-22T10:49:56Z

/ok to test

github-actions · 2024-11-22T12:43:49Z

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  🟩 nvcc12.6           Pass: 100%/33  | Total:  7h 52m | Avg: 14m 19s | Max: 17m 47s | Hits:  52%/123   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/54  | Total: 12h 36m | Avg: 14m 00s | Max: 17m 48s | Hits:  52%/246   
🟩 cxx
  🟩 Clang9             Pass: 100%/2   | Total: 26m 59s | Avg: 13m 29s | Max: 14m 14s
  🟩 Clang10            Pass: 100%/2   | Total: 29m 29s | Avg: 14m 44s | Max: 15m 56s
  🟩 Clang11            Pass: 100%/4   | Total: 56m 07s | Avg: 14m 01s | Max: 15m 16s
  🟩 Clang12            Pass: 100%/4   | Total: 56m 16s | Avg: 14m 04s | Max: 14m 23s
  🟩 Clang13            Pass: 100%/4   | Total: 54m 51s | Avg: 13m 42s | Max: 14m 24s
  🟩 Clang14            Pass: 100%/4   | Total: 58m 25s | Avg: 14m 36s | Max: 16m 56s
  🟩 Clang15            Pass: 100%/2   | Total: 28m 38s | Avg: 14m 19s | Max: 14m 19s
  🟩 Clang16            Pass: 100%/4   | Total: 55m 05s | Avg: 13m 46s | Max: 15m 35s
  🟩 Clang17            Pass: 100%/2   | Total: 28m 13s | Avg: 14m 06s | Max: 14m 55s
  🟩 Clang18            Pass: 100%/2   | Total: 33m 08s | Avg: 16m 34s | Max: 16m 59s
  🟩 GCC9               Pass: 100%/2   | Total: 27m 53s | Avg: 13m 56s | Max: 14m 00s
  🟩 GCC10              Pass: 100%/4   | Total: 56m 46s | Avg: 14m 11s | Max: 15m 34s
  🟩 GCC11              Pass: 100%/4   | Total: 59m 16s | Avg: 14m 49s | Max: 15m 44s
  🟩 GCC12              Pass: 100%/7   | Total:  1h 47m | Avg: 15m 22s | Max: 17m 48s
  🟩 GCC13              Pass: 100%/3   | Total: 38m 37s | Avg: 12m 52s | Max: 14m 41s
  🟩 MSVC14.36          Pass: 100%/1   | Total: 11m 07s | Avg: 11m 07s | Max: 11m 07s | Hits:  52%/123   
  🟩 MSVC14.39          Pass: 100%/1   | Total:  9m 44s | Avg:  9m 44s | Max:  9m 44s | Hits:  52%/123   
  🟩 NVHPC24.7          Pass: 100%/2   | Total: 17m 55s | Avg:  8m 57s | Max:  9m 17s
🟩 cxx_family
  🟩 Clang              Pass: 100%/30  | Total:  7h 07m | Avg: 14m 14s | Max: 16m 59s
  🟩 GCC                Pass: 100%/20  | Total:  4h 50m | Avg: 14m 30s | Max: 17m 48s
  🟩 MSVC               Pass: 100%/2   | Total: 20m 51s | Avg: 10m 25s | Max: 11m 07s | Hits:  52%/246   
  🟩 NVHPC              Pass: 100%/2   | Total: 17m 55s | Avg:  8m 57s | Max:  9m 17s
🟩 gpu
  🟩 v100               Pass: 100%/54  | Total: 12h 36m | Avg: 14m 00s | Max: 17m 48s | Hits:  52%/246   
🟩 jobs
  🟩 Build              Pass: 100%/49  | Total: 11h 09m | Avg: 13m 39s | Max: 16m 09s | Hits:  52%/246   
  🟩 Test               Pass: 100%/5   | Total:  1h 26m | Avg: 17m 23s | Max: 17m 48s
🟩 sm
  🟩 90                 Pass: 100%/1   | Total:  9m 54s | Avg:  9m 54s | Max:  9m 54s
  🟩 90a                Pass: 100%/1   | Total: 10m 05s | Avg: 10m 05s | Max: 10m 05s
🟩 std
  🟩 17                 Pass: 100%/29  | Total:  6h 37m | Avg: 13m 42s | Max: 17m 48s
  🟩 20                 Pass: 100%/25  | Total:  5h 58m | Avg: 14m 20s | Max: 17m 26s | Hits:  52%/246

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 10m 48s | Avg: 5m 24s | Max: 8m 38s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 ctk
  🟩 12.6               Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 gpu
  🟩 v100               Pass: 100%/2   | Total: 10m 48s | Avg:  5m 24s | Max:  8m 38s
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 10s | Avg:  2m 10s | Max:  2m 10s
  🟩 Test               Pass: 100%/1   | Total:  8m 38s | Avg:  8m 38s | Max:  8m 38s

🟩 python: Pass: 100%/1 | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s

🟩 cpu
  🟩 amd64              Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 ctk
  🟩 12.6               Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 cxx
  🟩 GCC13              Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 cxx_family
  🟩 GCC                Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 gpu
  🟩 v100               Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s
🟩 jobs
  🟩 Test               Pass: 100%/1   | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
+/-	libcu++
	CUB
	Thrust
	CUDA Experimental
	python
	CCCL C Parallel Library
	Catch2Helper

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
+/-	libcu++
+/-	CUB
+/-	Thrust
+/-	CUDA Experimental
+/-	python
+/-	CCCL C Parallel Library
+/-	Catch2Helper

🏃‍ Runner counts (total jobs: 396)

#	Runner
327	`linux-amd64-cpu16`
28	`linux-arm64-cpu16`
26	`linux-amd64-gpu-v100-latest-1`
15	`windows-amd64-cpu16`

NVIDIA#2923) Co-authored-by: Michael Schellenberger Costa <[email protected]>

implement cxx 26 span's constructor from initializer list

068aa24

davebayer requested review from a team as code owners November 21, 2024 09:44

davebayer requested review from ericniebler and alliepiper November 21, 2024 09:44

Merge branch 'main' into impl_cxx_26_std_span_initializer_list

9d64202

miscco requested changes Nov 21, 2024

View reviewed changes

fix tests and noexcept

ee335eb

pre-commit-ci bot and others added 2 commits November 21, 2024 11:09

[pre-commit.ci] auto code formatting

8659d0d

Merge branch 'main' into impl_cxx_26_std_span_initializer_list

eec8d89

davebayer and others added 2 commits November 21, 2024 20:56

fix invalid default template parameter name

5b74f70

Merge branch 'main' into impl_cxx_26_std_span_initializer_list

e103494

miscco approved these changes Nov 22, 2024

View reviewed changes

remove explicit from dynamic extent constructor

d7dcff7

Fix initializer_list using other constructors

b7962ad

miscco approved these changes Nov 22, 2024

View reviewed changes

miscco enabled auto-merge (squash) November 22, 2024 12:28

miscco merged commit 4ae70bb into NVIDIA:main Nov 22, 2024
411 checks passed

davebayer added a commit to davebayer/cccl that referenced this pull request Nov 22, 2024

implement C++26 std::span's constructor from std::initializer_list (

e897f1f

NVIDIA#2923) Co-authored-by: Michael Schellenberger Costa <[email protected]>

trxcllnt pushed a commit to trxcllnt/cccl that referenced this pull request Nov 23, 2024

implement C++26 std::span's constructor from std::initializer_list (

cdb522e

NVIDIA#2923) Co-authored-by: Michael Schellenberger Costa <[email protected]>

davebayer added a commit to davebayer/cccl that referenced this pull request Nov 25, 2024

implement C++26 std::span's constructor from std::initializer_list (

8ee0b18

NVIDIA#2923) Co-authored-by: Michael Schellenberger Costa <[email protected]>

davebayer mentioned this pull request Dec 1, 2024

Update docs with recent features #2994

Merged

davebayer added a commit to davebayer/cccl that referenced this pull request Dec 2, 2024

implement C++26 std::span's constructor from std::initializer_list (

05de1b3

NVIDIA#2923) Co-authored-by: Michael Schellenberger Costa <[email protected]>

davebayer deleted the impl_cxx_26_std_span_initializer_list branch December 16, 2024 10:10

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implement C++26 `std::span`'s constructor from `std::initializer_list` #2923

implement C++26 `std::span`'s constructor from `std::initializer_list` #2923

davebayer commented Nov 21, 2024 •

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🟩 libcudacxx: Pass: 100%/118 | Total: 21h 41m | Avg: 11m 01s | Max: 44m 38s | Hits: 47%/9508

🟩 thrust: Pass: 100%/111 | Total: 2d 04h | Avg: 28m 33s | Max: 1h 19m | Hits: 65%/9260

🟩 cub: Pass: 100%/110 | Total: 3d 08h | Avg: 43m 58s | Max: 1h 19m | Hits: 3%/3028

🟩 cudax: Pass: 100%/54 | Total: 12h 36m | Avg: 14m 00s | Max: 17m 48s | Hits: 52%/246

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 10m 48s | Avg: 5m 24s | Max: 8m 38s

🟩 python: Pass: 100%/1 | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s

👃 Inspect Changes

Modifications in project?

Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 396)

implement C++26 std::span's constructor from std::initializer_list #2923

implement C++26 std::span's constructor from std::initializer_list #2923

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davebayer commented Nov 21, 2024 • edited Loading

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miscco commented Nov 21, 2024

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github-actions bot commented Nov 22, 2024

🟩 libcudacxx: Pass: 100%/118 | Total: 21h 41m | Avg: 11m 01s | Max: 44m 38s | Hits: 47%/9508

🟩 thrust: Pass: 100%/111 | Total: 2d 04h | Avg: 28m 33s | Max: 1h 19m | Hits: 65%/9260

🟩 cub: Pass: 100%/110 | Total: 3d 08h | Avg: 43m 58s | Max: 1h 19m | Hits: 3%/3028

🟩 cudax: Pass: 100%/54 | Total: 12h 36m | Avg: 14m 00s | Max: 17m 48s | Hits: 52%/246

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 10m 48s | Avg: 5m 24s | Max: 8m 38s

🟩 python: Pass: 100%/1 | Total: 16m 05s | Avg: 16m 05s | Max: 16m 05s

👃 Inspect Changes

Modifications in project?

Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 396)

implement C++26 `std::span`'s constructor from `std::initializer_list` #2923

implement C++26 `std::span`'s constructor from `std::initializer_list` #2923

davebayer commented Nov 21, 2024 •

edited

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