Dear all,
I am seeing an unexpected behaviour when combining ImmutableArrays and
struct like types (I forgot what the proper name is). In particular, the
following code:
using ImmutableArrays
immutable Mytype
pos::Vector2{Float32}
end
println(Mytype([4.; 5.]))
incorrectly prints "Mytype(Float32[0.0,2.25])" instead of the expected
"Mytype(Float32[4.0,5.0])". This is on the latest Ubuntu,
Julia 0.3.0-prerelease+3628 (2014-06-11 15:07 UTC).
Both "Mytype([4f0; 5f0])" and "convert(Vector2{Float32},[4.;5.])" work as
expected but changing "immutable" to "type" does not change the error.
So is there a bug in ImmutableArrays, in Julia, or am I doing something
wrong? If I am doing something wrong, I would at least expect a warning -
this error cost me quite some time to find out.
Maybe I do not understand how ImmutableArrays is supposed to work, since
typeof(convert(Vector2{Float32},[4.;5.]).e1)
gives Float64, not Float32 as expected. So is ImmutableArrays actually an
efficient way of storing fixed-size vectors? Or do I have to stick to
Float64 even if I do not need the accuracy?
Thank you for your help. Yours,
Jan
