Access macro variable via an expression

[Neil.Mowbray]

Folks,

Is it possible to access macro arguments using an expression?
For example, using m4sugar's m4_for() I would like to be able
to do things like

m4_changequote()
m4_changequote([,])

m4_define([m4__print_arguments],
[m4_for([aArg], 1, $#, +1, [  aArg = $aArg  ])])

m4__print_arguments(A, B, C, D, E)

And have the expression $aArg evalute to values of $1, $2 ... as
the macro aArg ranges over 1,2, ....  That is, have the above produce

1 = A   2 = B   3 = C

Rather that what it does produce which is

1 = $1   2 = $2   3 = $3

Regards, Neil