How to materialize LazyArray

[tkf]

Currently there materialize(LazyArray(lazy::Union{Applied, Broadcasted})) seems to just pass-through a LazyArray. This is why some tests here do not work:

LazyArrays.jl/test/macrotests.jl

Lines 51 to 54 in b58b239

	@testset "materialize(LazyArray(@~ $label))" begin
	@test_skip materialize(LazyArray(lazy)) == desired # should work
	@test materialize(LazyArray(lazy)) ≈ desired
	end

What is the canonical way to materialize a LazyArray? That is to say, what is the function f such that f(LazyArray(lazy)) == materialize(lazy)? Should it be materialize? collect? copy? something else?

[dlfivefifty]

Is there a reason you can’t just call Array?

[tkf]

Output array can be sparse or structured. (So I guess collect is out, actually.)

[dlfivefifty]

We could add

materialize(A::ApplyArray) = materialize(Applied(A))
materialize(A::BroadcastArray) = materialize(Broadcasted(A))
copy(A::ApplyArray) = copy(Applied(A))
copy(A::BroadcastArray) = copy(Broadcasted(A))

(I'll have to double check it doesn't break my fullmaterialize routine needed in ContinuumArrays.jl)

[tkf]

This is just something that I notice while writing the test. If it can break your code, let's set the priority very low.

[dlfivefifty]

QuasiArrays.jl has the function croncetize(_) which we can move up here, to force a lazy array to be materialized.