fixed forbidden samrai Index to IntVector conversion

[UCaromel]

the title says it all

[coderabbitai]

📝 Walkthrough

Walkthrough

Replaced explicit SAMRAI::hier::IntVector initializations with brace-initialized IntVector in tests and switched local variable declarations to auto const in FieldGeometry::toFieldBox. No behavioral or public API changes.

Changes

Cohort / File(s)	Change Summary
Type deduction in core header src/amr/data/field/field_geometry.hpp	Replaced explicit SAMRAI::hier::IntVector local variable declarations (lower, upper) with auto const to use type deduction; no logic change.
Explicit IntVector construction in tests tests/amr/data/particles/copy_overlap/test_particledata_copy_periodicNd.cpp, tests/amr/data/particles/stream_pack/test_main.cpp	Changed initializers of SAMRAI::hier::Transformation to pass an explicitly constructed SAMRAI::hier::IntVector{...} (wrapping the existing subtraction expressions) instead of relying on implicit construction; no behavioral change.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Verify the auto const deductions in field_geometry.hpp yield the intended IntVector type and no surprising references/temporaries are introduced.
• Check the test initializers compile without ambiguity and still match expected semantics in Transformation constructors.

Possibly related PRs

• simplify toFieldBox usage #1018 — Modifies FieldGeometry::toFieldBox and related call sites; likely related to the header change here.

Suggested reviewers

• PhilipDeegan

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: fixing a forbidden SAMRAI Index to IntVector conversion issue.
Description check	✅ Passed	The description references the title and is related to the changeset, though it is minimal and relies on the title for clarity.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📥 Commits

Reviewing files that changed from the base of the PR and between 7caa514 and b7ce5c2.

📒 Files selected for processing (2)

• tests/amr/data/particles/copy_overlap/test_particledata_copy_periodicNd.cpp (1 hunks)
• tests/amr/data/particles/stream_pack/test_main.cpp (1 hunks)

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🔇 Additional comments (2)

tests/amr/data/particles/stream_pack/test_main.cpp (1)

68-69: LGTM! Correct fix for SAMRAI type mismatch.

The explicit IntVector construction resolves the compilation error where Index::operator- returns an Index but Transformation expects an IntVector. This aligns with the SAMRAI API requirements.

tests/amr/data/particles/copy_overlap/test_particledata_copy_periodicNd.cpp (1)

60-61: LGTM! Resolves the reported compilation error.

The explicit IntVector wrapper directly fixes the compilation error reported in the PR objectives at this exact location. The change converts the Index arithmetic result to the IntVector type expected by Transformation.

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[PhilipDeegan]

there's also this

tests/amr/data/particles/copy_overlap/test_particledata_copy_periodicNd.cpp:60:34: error: could not convert ‘{SAMRAI::hier::Index::operator-(const SAMRAI::hier::Index&) const((* &((twoParticlesDataNDTouchingPeriodicBorders<PHARE::core::DimConst<3> >*)this)->twoParticlesDataNDTouchingPeriodicBorders<PHARE::core::DimConst<3> >::sourceDomain.SAMRAI::hier::Box::upper()))}’ from ‘<brace-enclosed initializer list>’ to ‘SAMRAI::hier::Transformation’
   60 |     SAMRAI::hier::Transformation transformation{destPdat.getGhostBox().lower()