feat: selectively attach a type or method and all its dependencies #220

Let's take the following pseudo header file as an example

struct WHEEL { 
    float rimSize; 
} Wheel;

enum DriveType { Front, Rear, All };

struct CAR { 
    Wheel wheels[4]; 
    DriveType driveType;
    float weight;
} Car;

void ReverseCar(Car car);

// a lot of other stuff we're not interested in

Right now you would have to write the following mappings.xml file to make use of the ReverseCar method.

<?xml version="1.0" encoding="utf-8"?>
<config id="id" xmlns="urn:SharpGen.Config">
  <namespace>Foo</namespace>
  <include file="vehicles.h" namespace="Foo.Cars">
    <attach>Wheel</attach>
    <attach>DriveType</attach>
    <attach>Car</attach>
    <attach>ReverseCar</attach>
  </include>

I would like to be able to simplify this to:

<?xml version="1.0" encoding="utf-8"?>
<config id="id" xmlns="urn:SharpGen.Config">
  <namespace>Foo</namespace>
  <include file="cars.h" namespace="Foo.Cars">
    <attach>ReverseCar</attach>
  </include>

Which should automatically attach all the types, enums, etc... needed to make the ReverseCar method work. I would hope this would work directly. But otherwise we could add an attribute to the attach tag like AutoAttachDependencies=true or something like that.

It would be nice if this would work anything that you can attach, not just functions.

Disclaimer: I'm super new to SharpGen so I have no clue about the technical complexity to make this work, or if there are already other ways to accomplish this.