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Complex/Imaginary numbers

Okay, so I want to add an <imaginary> type which can use <complex>
operations (e.g. \+, \*, etc), and is created thusly:

5i; 2 + 7i; 3.14i; sqrt(-12);
5 * i; (2 + 2.2i) / 3; (1.2 - 4.2i) * (0.5 + 6i);

How do I get Dylan to accept i as a postfix numeric modifier to create
an <imaginary> instance.  I really don't want use operations such as
make(<complex>, imaginary: 5) or i(5) to create 5i, nor
make(<complex>, real: 4, imaginary: 3) or 4 + i(3) to create 4 + 3i.

As a side node, I've got the above implemented as pairs (so, 2 + 2.2i
is #(2 . 2.2), and I've added arithmetic operations for pairs to the
generic functions).

Does the macro system have facilities for postfix modifiers?  How have
others done this?

Sincerely, Douglas M. Auclair


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