Add `constant_wrapper` header with `divide`/`multiply`/`increment` and C++26 CMake support (P3663 piece 1 of N) - #449

Merged

crtrott merged 9 commits into

copilot/split-pr-into-subpieces

Feb 20, 2026

Commits on Feb 19, 2026

Initial plan
Copilot
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48d74dd
Piece 1: foundational infrastructure for conforming strided_slice and integral_constant_like

Copilot
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crtrott
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768ace6
Add _codeql_build_dir to .gitignore

Copilot
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crtrott
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8608ff8
Trim to minimal first piece: constant_wrapper + C++26 CMake support only

Copilot
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crtrott
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67f5833
Rename MDSPAN_ENABLE_P3663 to MDSPAN_IMPL_ENABLE_P3663; make test_constant_wrapper unconditional

Copilot
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crtrott
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8cc9103
Apply suggestion from @mhoemmen

crtrott
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mhoemmen
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571e161
Move constant_wrapper and cw into detail namespace

Copilot
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crtrott
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48aa88c
Move divide/multiply to constant_wrapper.hpp; add cw overloads; add Arithmetic test

Copilot
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crtrott
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516d7ef

Commits on Feb 20, 2026

Only have one increment definition
crtrott
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d086284