Jukka Aho 41e09b2c92 feat(compat): Add compatibility shim for old mutable field API ...

Implements compatibility layer to allow old test code to run with new
immutable element design (though fields won't actually update).

src/elements/elements.jl:
- Replaced has_dfield/get_dfield to work with new fields API
- Fixed get_sfield/get_dfield to handle empty Tuple{} fields
- All dfield functions now map to element.fields (immutable NamedTuple)

src/topology/*.jl (seg2, tri3, quad4, tet4, hex8):
- Added nnodes() implementation for each topology type
- Returns corner node count (backwards compatibility)
- Example: nnodes(::Triangle) = 3, nnodes(::Hexahedron) = 8
- Note: Actual node count depends on basis degree in new architecture

Test Results:
- test_topology_standalone.jl: 36/36 tests passing ✓
- Full test suite: 43 errors (same as before)
- Error breakdown:
  * 40+ tests: Problem types not defined (Elasticity, Heat, Mortar)
  * 2 tests: Mesh readers not defined (aster_read_mesh)
  * 1 test: Tries to mutate empty element (test_elasticity_1d)

Next Steps:
- Tests that create empty elements then mutate need rewriting
- Pattern: Element(Seg2, (1,2)) + update!() → not compatible
- New pattern: Element(..., fields=(geometry=X, displacement=u))
- See docs/design/IMMUTABILITY.md for migration guide

2025-11-09 18:08:39 +02:00

..

IMMUTABILITY.md

feat(compat): Add compatibility shim for old mutable field API

2025-11-09 18:08:39 +02:00