Manny Calavera wrote:
> I'm looking for a STANDARD methods to unmarshal a class istance without
> have source file.

How would you want it to work? For example, if it contains an object of 
class Foo::Bar, and such class does not exist at runtime, would you want 
it to create a fresh Foo::Bar class? Such class would have no methods of 
course, apart from those inherited from Object.

A quick experiment suggests that Object.const_missing is not invoked by 
Marshal.load, so perhaps parsing the Marshal format yourself is the best 
bet.
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