Questions for a new string type and on GC/alignment/padding

[yuyichao]

@Palli

This works, but really I want this to take 128 bits. Is that what happens and/or can I do:

It should be on 64bits platforms.

@Palli

or can I do:

immutable New_String_Type <: AbstractString
first::UInt64
last::String
end

Absolutely not!

@Palli

Is this somehow better?:

immutable New_String_Type <: AbstractString
first::UInt64
last::Union{Vector{UInt8}, UInt64}
end

Not sure what you are trying to do.

@Palli

I can locate, but is there a workaround for @edit here?

Are you trying to edit =?

@Palli

I see alignments, and jl_value_t (at least 16-byte, didn’t read carefully…) that I assume is an overhead for all objects, that is the target of the String pointer (not immutable itself).

…

Not sure if you are asking something or not. But I should at least correct that jl_value_t has zero size instead of 16.