[C++-sig] Extract

[Stefan Seefeld]

Sean Ross-Ross wrote:

> And yes I could create a method to use only a limited number of types
> but I would like to pass a python object in as "value" and have boost
> try and extract a c++ object to pass to set.

Python isn't statically typed, but it is strongly typed. Thus, you
have to write a (possibly big) series of if/else statements (or conceptually equivalent)
that lets you dispatch to the appropriate set<whatever>() method. There is
no way to automatize that and let boost handle it.

void my_set(ParameterList &list, std::string const &name, object value)
{
  if (is<foo>(value)) list.set(name, extract<foo>(value));
  else if (is<bar>(value)) list.set(name, extract<bar>(value));
  else if (is<baz>(value)) list.set(name, extract<baz>(value));

etc., you get the idea. (it is up to you to implement the is<T>(object) function...)

Regards,
		Stefan

-- 

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