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On 29 Jul 2008, at 07:25, E. Wing wrote:

What is the following case you describe? m{1,2}
Is this a function call? m({1,2}). Is this the functable technique I
read about somewhere else?

Yep, m{1,2} is shorthand for m( {1,2} ) so you can catch it in your matrix's __call metamethod.