Macro define_derived_property

macro_rules! define_derived_property {
    (
        $derived_property:ident,
        $value:ty,
        [$($dependency:ident),*],
        [$($global_dependency:ident),*],
        |$($param:ident),+| $derive_fn:expr
    ) => { ... };
    (
        $derived_property:ident,
        $value:ty,
        [$($dependency:ident),*],
        |$($param:ident),+| $derive_fn:expr
    ) => { ... };
}

Defines a derived person property with the following parameters:

• $person_property: A name for the identifier type of the property
• $value: The type of the property’s value
• [$($dependency),+]: A list of person properties the derived property depends on
• [$($dependency),*]: A list of global properties the derived property depends on (optional)
• $calculate: A closure that takes the values of each dependency and returns the derived value