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openmc-dev / openmc Public

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Replace xtensor with internal Tensor/View classes#3805

Merged

paulromano merged 53 commits intoopenmc-dev:developopenmc-dev/openmc:developfrom

jtramm:no_xtensor_claudejtramm/openmc:no_xtensor_claudeCopy head branch name to clipboard

Feb 17, 2026

Conversation Commits53 (53)Checks Files changed

Merged

Replace xtensor with internal Tensor/View classes#3805
paulromano merged 53 commits intoopenmc-dev:developfrom
jtramm:no_xtensor_claude

Commits

Commits on Feb 9, 2026

claude says that all tests are passing and it is done
jtramm
committed
claude fixes submodule issue?
jtramm
committed
added tensor.h
jtramm
committed
claude added views to the tensor.h
jtramm
committed

Commits on Feb 10, 2026

Switched back to simpler tensor.h implementation with fewer advanced/confusing features
jtramm
committed
simplified weight windows xtensor usage
jtramm
committed
removed dead code
jtramm
committed
Added better comments and code cleanup
jtramm
committed
Cleaning up the tensor implementation to group data/methods/constructors etc together in a more organized manner.
jtramm
committed
removed dead code
jtramm
committed

Commits on Feb 11, 2026

refactored to simpler (non-xtensor-like) interface.
jtramm
committed
Refactor from std::size_t to size_t, and from openmc::vector to vector
jtramm
committed
code cleanup - making variable names and comments match new API
jtramm
committed
Removal of development jargon from code comments
jtramm
committed
greatly simplified the sum function
jtramm
committed
Made several functions rank agnostic rather than assuming a max rank
jtramm
committed
fixed some issues with includes
jtramm
committed
Making the naming of classes more clear: Tensor, StaticTensor2D, and View1D
jtramm
committed
Replaced View1D with a true n-dimensional View class.
jtramm
committed
knocked off TODO item that was due to a long term bug in xtensor
jtramm
committed
cleanup of terminology
jtramm
committed
made more use of the view where it makes sense
jtramm
committed
made more use of view, and added a few small needed functions to improve utility
jtramm
committed
renamed slice_at to select to make it more clear what it is actually doing
jtramm
committed

Commits on Feb 12, 2026

Made explicit view variable declarations rather than using auto.
jtramm
committed
removed several Tensor constructors to simplify things
jtramm
committed
Use T in view class instead of converting to value_type
jtramm
committed
more view simplification
jtramm
committed
more view simplification
jtramm
committed
Simplification of view iterators
jtramm
committed
tensor.h cleanup
jtramm
committed
add some docstrings to more tensor functions
jtramm
committed
tensor comment cleanup
jtramm
committed
removed a few unneeded functions
jtramm
committed
removed xtensor mention in docs, and added ctest unit tests for tensor classes
jtramm
committed
cleanup and code review incorporation
jtramm
committed
removed 2D-wrappers row and col.
jtramm
committed
merged with develop
jtramm
committed
ran clang format
jtramm
committed
reverted unneeded comment mod
jtramm
committed
fixed MPI error
jtramm
committed
refactored to allow for ranges. Much more rank agnostic now
jtramm
committed
ran clang format again
jtramm
committed

Commits on Feb 13, 2026

LLVM 15 clang format
jtramm
committed
fixed header include
jtramm
committed
fixed header issue
jtramm
committed
fix cassert issue (previously transitively included by xtensor)
jtramm
committed

Commits on Feb 16, 2026

made tensor::ones function, and changed range API to follow standard tensor library conventions
jtramm
committed
ran clang-format 15
John Tramm
committed
added front and back helper functions
jtramm
committed
Merge branch 'develop' into no_xtensor_claude
jtramm
committed
Moved front/back methods from view to tensor.
jtramm
committed
update unit tests
jtramm
committed

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