newbie confusion with arrays and structs

[Robert Bernecky]

Hi. I am trying to write my first D program, and am quite stuck in several
areas. This is on Ubuntu 10.10 with the dmd DMD64 D Compiler v2.055.

I want to create a generic struct for multi-dimensional arrays,
in which the value parts can be shared. E.g., an array comprises
a vector of its raveled elements, and an integer shape vector
comprising the length of each axis. Thus, a 2x4 matrix of
the integers [0,1,2,3,4,5,6,7] would have a shape vector of [2,4],
and a value of the integers above, contained in a Parray struct, as
shown in attachment 1. The calling environment is in prd.d.

I want to be able to share shape vectors and values. For example,
the above matrix might also have its value referenced by its raveled
cousin, whose Parray shape would be [8].

I get the impression that calling by ref on Parray is what I want, as long
as anything that wants to modify a Parray shape or value element explicitly
copies the relevant part.

However, none of this stuff works. Here's what I get:

dmd prd.d -unittest

prd.o:(.data+0x250): undefined reference to `_D5Array12__ModuleInfoZ'
prd.o:(.data._D23TypeInfo_S5Array6Parray6__initZ+0x28): undefined reference to
`_D5Array6Parray6__initZ'
prd.o: In function `_D3prd4iotaFiZPS5Array6Parray':
prd.d:(.text._D3prd4iotaFiZPS5Array6Parray+0x101): undefined reference to
`_D5Array6Parray6__ctorMFNcAiAiZS5Array6Parray'
collect2: ld returned 1 exit status
--- errorlevel 1

This is not exactly illuminating, and I have no idea what sort of dumb
mistake(s) I'm making in the code.

Suggestions and educational pointers are very welcome!

Thanks,
Robert



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end
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`
end