On 2/26/08, Ralf Hemmecke wrote:
> ...
> I am not so sure about Axiom, but in Aldor each type can
> provide a function "bracket". The compiler then translates
>
> [x,y,z,t]
>
> into
>
> bracket(x,y,z,t).
>
Axiom has an operator called 'construct' that is called by the
interpreter in the case of the '[ ... ]' syntax.
> In particular List and Record provide such bracket function of type
>
> (in List(T))
> bracket: Tuple T -> %
> which allows the usual list construction.
>
> (in Record(a: Integer, b: String, c: Float))
> bracket: (Integer, String, Float) -> %
> which allows
>
> Arec: Record(a:Integer, b:String, c:Float) := [123,"azerty",1.2e-3]
>
> What else would you want?
>
I think it is very useful to also have a similar operator called
'brace' in the case of the '{ ... }' syntax. This notation is very
common in mathematics, e.g. in 'choose' and in the Christofel (tensor)
symbols in geometry, etc.
Regards,
Bill Page.
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