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`Matrix(sol)` can return other types than `Matrix`

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
30/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
julia
Domain
data

Research direction

Start with src/vector_of_array.jl around lines 90-95 and reproduce Matrix(sol) for a DE solution whose states are CuVectors. Compare the resulting type with Matrix(Matrix(sol)), then inspect nearby array-construction behavior. Done means the intended Matrix conversion behavior is settled and covered by a regression test.

Written by the indexing model from the issue text.

Description

Calling Matrix(sol) on an *DE solution returns a CuMatrix when the states are CuVectors.

This is because Matrix(sol) is implemented using a generic hcat (see snippet below). This is a very obvious and useful thing to do, but would it make more sense as an implementation of convert(AbstractMatrix, sol) rather than Matrix(sol)?

I know constructors are not guaranteed to return the invoked type, but it's confusing that you have to call Matrix(Matrix(sol)) to actually get a Matrix.

https://github.com/SciML/RecursiveArrayTools.jl/blob/d06ecb856f43bc5e37cbaf50e5f63c578bf3f1bd/src/vector_of_array.jl#L90-L95

Dominant language
Julia
Stars
233
Forks
76
Avg merge
2h 17m
Merged PRs (30d)
9

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