On Friday, April 25, 2014 6:33:26 PM UTC+2, Matthew wrote:
>
> Regarding Symbol in MatrixSymbol what we really need is a Basic that just 
> holds a name/string.  The current Symbol object does that plus a whole lot 
> of other things that we don't need.  Probably we just need a String(Basic) 
> class or something similar.
>

Just thinking out loud: What's about storing the name directly 
in MatrixSymbol.name and overloading MatrixSymbol.func to [return a closure 
that] inject[s] the name into a new instance.

This would make sense because afaics the whole idea behind the .args 
interface is make it easy to implement generic transformations, and I don't 
see why such transformations should ever want to change the name of a 
MatrixSymbol. In this sense the dimensions are the only 'arguments' to a 
MatrixSymbol. (The symbol name is afaics not an 'argument' of Symbol 
objects either.)

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