Function try_inherit_properties 

pub fn try_inherit_properties(
    child: &mut (dyn Reflect + 'static),
    parent: &(dyn Reflect + 'static),
    ignored_types: &[TypeId],
) -> Result<(), InheritError>

Simultaneously walks over fields of given child and parent and tries to inherit values of properties of child with parent’s properties. It is done recursively for every fields in entities.

How it works

In general, it uses reflection to iterate over child and parent properties and trying to inherit values. Child’s field will take parent’s field value only if child’s field is non-modified. There are one edge case in inheritance: collections.

Inheritance for collections itself works the same as described above, however the content of collections can only be inherited if their sizes are equal. Also, since inheritance uses plain copy of inner data of inheritable variables, it works in a special way.

Child                                       Parent (root)
    InheritableVariableA            <-         InheritableVariableA*
    InheritableCollection*          ->         InheritableCollection*
        Item0                                       Item0
            InheritableVariableB*   ->                  InheritableVariableB*
            InheritableVariableC    <-                  InheritableVariableC*
        Item1                                       Item1
            ..                                          ..
        ..                                          ..
        ItemN                                       ItemN
            ..                                          ..

* - means that the variable was modified

At first, InheritableVariableA will be copied from the parent as usual. Next, the inheritable collection won’t be copied (because it is modified), however its items will be inherited separately. InheritableVariableB won’t be copied either (since it is modified too), but InheritableVariableC will be copied from parent.