v2.0.0 — imap, MappedRef, modular source layout#10
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AFeuerpfeil merged 6 commits intomainfrom Apr 2, 2026
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Breaking changes:
- PeriodicArray type signature: {T,N,A,F} → {T,N,A,F,G} (adds imap type param G)
- Internal field renamed from .map to .fmap; new .imap field added
- Source split into types.jl, indexing.jl, broadcast.jl, vector_interface.jl,
repeat.jl, circshift.jl, reverse.jl, mapped_ref.jl
New features:
- PeriodicArray now accepts an explicit imap for setindex! (defaults to
NegatedShiftMap(fmap) when omitted, preserving previous behaviour)
- New MappedRef type and mapped_ref(arr, I...) for lazy mutable out-of-bounds
element access, fixing iterated mutation (e.g. x[i][j] = v)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
PeriodicArraytype signature extended from{T,N,A,F}to{T,N,A,F,G}— addsGfor the inverse map type; internal field renamed from.mapto.fmap, new.imapfield addedtypes.jl,indexing.jl,broadcast.jl,vector_interface.jl,repeat.jl,circshift.jl,reverse.jl,mapped_ref.jl)PeriodicArrayaccepts an explicitimapargument forsetindex!; defaults toNegatedShiftMap(fmap)(i.e.(x, shifts...) -> fmap(x, -shifts...)) preserving previous behaviourMappedReftype andmapped_ref(arr, I...)— lazy mutable wrapper for out-of-bounds elements that appliesfmapon reads andimapon writes, fixing the long-standing limitation where iterated mutation (x[i][j] = v) silently did nothing