tiger-lib 1.18.0

Library used by the tools ck3-tiger, vic3-tiger, and imperator-tiger. This library holds the bulk of the code for them. It can be built either for ck3-tiger with the feature ck3, or for vic3-tiger with the feature vic3, or for imperator-tiger with the feature imperator, but not both at the same time.
Documentation 
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use crate::block::Block;
use crate::context::ScopeContext;
use crate::db::{Db, DbKind};
use crate::everything::Everything;
use crate::game::GameFlags;
use crate::item::{Item, ItemLoader};
use crate::scopes::Scopes;
use crate::token::Token;
use crate::validator::Validator;

#[derive(Clone, Debug)]
pub struct SuccessionAppointment {}

inventory::submit! {
    ItemLoader::Normal(GameFlags::Ck3, Item::SuccessionAppointment, SuccessionAppointment::add)
}

impl SuccessionAppointment {
    pub fn add(db: &mut Db, key: Token, block: Block) {
        db.add(Item::SuccessionAppointment, key, block, Box::new(Self {}));
    }
}

impl DbKind for SuccessionAppointment {
    fn validate(&self, key: &Token, block: &Block, data: &Everything) {
        let mut vd = Validator::new(block, data);
        let mut sc = ScopeContext::new(Scopes::Character, key);
        sc.define_name("title", Scopes::LandedTitle, key);

        vd.field_script_value("candidate_score", &mut sc);
        vd.field_list_choice("default_candidates", CANDIDATE_TYPES);
        vd.advice_field("invested_candidates", "removed in 1.18");
        vd.field_choice("level", &["merit", "prestige", "piety", "influence"]);

        vd.field_bool("allow_children");
        vd.field_bool("allow_same_tier_candidates");
    }
}

const CANDIDATE_TYPES: &[&str] = &[
    "holder_close_family",
    "holder_close_extended_family",
    "holder_house_member",
    "landed_vassal",
    "landed_vassal_close_family",
    "landed_vassal_close_extended_family",
    "landed_vassal_house_member",
    "unlanded_noble_house_head",
    "unlanded_noble_close_family",
    "unlanded_noble_close_extended_family",
    "unlanded_noble_house_member",
    "holder_councilor",
    "holder_court_position",
    "direct_subject",
    // undocumented
    "direct_landed_vassal",
];