rhai/src/packages/map_basic.rs

#![cfg(not(feature = "no_object"))]

use crate::any::Dynamic;
use crate::def_package;
use crate::engine::{make_getter, Map};
use crate::parser::{ImmutableString, INT};
use crate::plugin::*;

use crate::stdlib::vec::Vec;

def_package!(crate:BasicMapPackage:"Basic object map utilities.", lib, {
    lib.combine(exported_module!(map_functions));
    set_exported_fn!(lib, make_getter("len"), map_funcs::len);
    set_exported_fn!(lib, "+=", map_funcs::mixin);
    set_exported_fn!(lib, "+", map_funcs::merge);

    // Register map access functions
    #[cfg(not(feature = "no_index"))]
    lib.combine(exported_module!(index_functions));
});

#[export_module]
mod map_functions {
    pub fn has(map: &mut Map, prop: ImmutableString) -> bool {
        map.contains_key(&prop)
    }
    pub fn len(map: &mut Map) -> INT {
        map_funcs::len(map)
    }
    pub fn clear(map: &mut Map) {
        map.clear();
    }
    pub fn remove(x: &mut Map, name: ImmutableString) -> Dynamic {
        x.remove(&name).unwrap_or_else(|| ().into())
    }
    pub fn mixin(map1: &mut Map, map2: Map) {
        map_funcs::mixin(map1, map2);
    }
    pub fn fill_with(map1: &mut Map, map2: Map) {
        map2.into_iter().for_each(|(key, value)| {
            if !map1.contains_key(&key) {
                map1.insert(key, value);
            }
        });
    }
}

mod map_funcs {
    use crate::engine::Map;
    use crate::parser::INT;
    use crate::plugin::*;

    #[export_fn]
    pub fn len(map: &mut Map) -> INT {
        map.len() as INT
    }
    #[export_fn]
    pub fn mixin(map1: &mut Map, map2: Map) {
        map2.into_iter().for_each(|(key, value)| {
            map1.insert(key, value);
        });
    }
    #[export_fn]
    pub fn merge(mut map1: Map, map2: Map) -> Map {
        map2.into_iter().for_each(|(key, value)| {
            map1.insert(key, value);
        });
        map1
    }
}

#[cfg(not(feature = "no_index"))]
#[export_module]
mod index_functions {
    pub fn keys(map: &mut Map) -> Vec<Dynamic> {
        map.iter().map(|(k, _)| k.clone().into()).collect()
    }
    pub fn values(map: &mut Map) -> Vec<Dynamic> {
        map.iter().map(|(_, v)| v.clone()).collect()
    }
}