Re: [Adobe-source-devel] Handling dates

[Sean P. <sea...@ma...>]

A quick glance at the sources and I see where missing a little bit  
(but not much)...

Internally, Adam operates on adobe::value_t for the values in cells  
(these are similar to boost any - but the type requirements are a bit  
stronger, the type passed to a value_t must be equality comparable  
and if ADOBE_SERIALIZATION is defined then it must support operator  
<< on an ostream. The serialization should go through the Adobe  
formatting code (but that's a loose requirement) -  
ADOBE_SERIALIZATION predates the boost serialization code but it  
isn't complete and although I like some of the ideas better we'll  
likely replace it with boost serialization. For now, it is only used  
for debugging.

The virtual machine has a pair of callbacks for user defined  
functions (one which takes named parameters and hands off a  
dictionary_t, and one that takes unnamed parameters and hands off an  
array_t) -

So all you need to do is write the functions you need for your dates  
in terms if the function interface for the virtual machine - and plug  
it in to the (non-existent but trivial to add) interface to Adam.

Programatically, you can set any value_t into an Adam sheet and it  
will carry through calculations (the type system is open).

I don't yet have operator overloading (working on how you recover an  
"any addable type" from an "any type"). A long term goal is to  
eliminate the dependency tracking in the VM and then the interface to  
Adam will be simple function objects (instead of "byte codes" in an  
array_t).

Sean

On Jan 19, 2006, at 5:36 PM, Thomas Witt wrote:

>
> Hi,
>
> For the prototype I am currently building I need to do date  
> computations in adam. AFAICS I need to be able to convert adam cell  
> values to dates and need to be able to supply a number of  
> operations on dates. Any advice on how to achieve this would be  
> greatly appreciated.
>
> Thanks
>
> Thomas
>
> -- 
> Thomas Witt
> wi...@ac...
>
>
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