Arrarys of reference

From: Tim Clacy (nospamtcl_at_nospamphaseone.nospamdk)
Date: 10/31/03 

Date: Fri, 31 Oct 2003 15:57:49 +0100

I know arrays of references are not allowed, but have a couple of questions:

1) Why aren't arrays of references allowed :-) ?

2) What's a good practical alternative?

As an example, Intel's PXA255 processor's DMA controller has 16 consecutive
registers for DMA channel control & status called DCSRx. It would be nice to
have a short-hand access to these registers in addition to indirect access
through structure members:

// Simple hardware model
//
struct DMAController
{
    Register DCSR[16];
    Register DINT;
    :
} dmac;

// Short-hand aliases
//
Register& DCSR0 = dmac.DCSR[0];
Register& DCSR1 = dmac.DCSR[1];
Register& DCSR2 = dmac.DCSR[2];
Register& DCSR3 = dmac.DCSR[3];
:

// This would be handy, but isn't allowed... and how would the references be
initialised in any case?
//
Register& DCSR[16];

If arrays of references were allowed, registers could be accessed using
DCSR[n]. Does anyone have a solution that would allow such convenient
short-hand? This is largely academic, since access through a structure
members will get the job done; however, I would be interested in any
thoughts and/or solutions (it bugs me). In general, if there is an array of
objects, how can access be provided to those objects by reference still
using array operators?

Tim

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