[erlang-questions] Using different number types

[Bengt Kleberg]

On 2007-05-28 01:10, Jay Anderson wrote:
...deleted
> An idea I've thought of is to define a 'numeric operations' module which
> represents these operations and knows how to delegate to the appropriate module.
> There's still the problem of numeric coercion which I was thinking of solving
> this in a way similar to ruby's coerce method. The problem with this is that
> whenever a new type is created this 'numeric operations' module has to be
> updated also.

to avoid changing the 'numeric operations' module you could make each 
number a tuple/record and have the appropriate module in the record.

-record( numeric_operation, {module, value}).

-module(numeric_operation).

-export([add/2]).

add( #numeric_operation(module=Module, value=Value1}, 
#numeric_operation(module=Module, value=Value2} ) ->
	Module:add( Value12, Value2 ).


bengt
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