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fix: remove map global and instead allow hashmap FromScript from list of tuples #332

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Feb 26, 2025
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49 changes: 49 additions & 0 deletions crates/bevy_mod_scripting_core/src/bindings/function/from.rs
Original file line number Diff line number Diff line change
Expand Up @@ -449,6 +449,14 @@ where
}
Ok(hashmap)
}
ScriptValue::List(list) => {
let mut hashmap = std::collections::HashMap::new();
for elem in list {
let (key, val) = <(String, V)>::from_script(elem, world.clone())?;
hashmap.insert(key, val);
}
Ok(hashmap)
}
_ => Err(InteropError::value_mismatch(
std::any::TypeId::of::<std::collections::HashMap<String, V>>(),
value,
Expand Down Expand Up @@ -499,3 +507,44 @@ where
}
}
}

macro_rules! impl_from_script_tuple {
($($ty:ident),*) => {
#[allow(non_snake_case)]
impl<$($ty: FromScript),*> FromScript for ($($ty,)*)
where
Self: 'static,
$(
for<'w> $ty::This<'w>: Into<$ty>,
)*
{
type This<'w> = Self;

fn from_script(value: ScriptValue, world: WorldGuard<'_>) -> Result<Self, InteropError> {
match value {
ScriptValue::List(list) => {
let expected_arg_count = $crate::bindings::function::script_function::count!( $($ty)* );
if list.len() != expected_arg_count {
return Err(InteropError::length_mismatch(expected_arg_count, list.len()));
}

let mut iter = list.into_iter();
$(
let next_item = iter.next().ok_or_else(|| InteropError::invariant("list has right amount of elements"))?;
let $ty = $ty::from_script(next_item, world.clone())?.into();
)*


Ok(($($ty,)*))
}
_ => Err(InteropError::value_mismatch(
std::any::TypeId::of::<Self>(),
value,
)),
}
}
}
};
}

bevy::utils::all_tuples!(impl_from_script_tuple, 1, 14, T);
6 changes: 3 additions & 3 deletions crates/bevy_mod_scripting_core/src/bindings/function/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -151,9 +151,9 @@ mod test {
for<'a> T::This<'a>: Into<T>,
{
test_is_valid_arg_and_return::<()>();
test_is_valid_return::<(T,)>();
test_is_valid_return::<(T, T)>();
test_is_valid_return::<(T, T, T, T, T, T, T, T, T, T)>();
test_is_valid_arg_and_return::<(T,)>();
test_is_valid_arg_and_return::<(T, T)>();
test_is_valid_arg_and_return::<(T, T, T, T, T, T, T, T, T, T)>();
}

fn test_option<T>()
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -530,10 +530,12 @@ impl ScriptFunctionRegistry {
}

macro_rules! count {
() => (0usize);
( $x:tt $($xs:tt)* ) => (1usize + count!($($xs)*));
() => (0usize);
( $x:tt $($xs:tt)* ) => (1usize + $crate::bindings::function::script_function::count!($($xs)*));
}

pub(crate) use count;

macro_rules! impl_script_function {

($( $param:ident ),* ) => {
Expand Down
19 changes: 0 additions & 19 deletions crates/bevy_mod_scripting_functions/src/core.rs
Original file line number Diff line number Diff line change
Expand Up @@ -656,25 +656,6 @@ impl GlobalNamespace {
&mut allocator,
))
}

/// Constructs a hash map. Useful for languages which do not make the distinction between lists and dictionaries.
///
/// Arguments:
/// * `map_or_list`: The list or map to convert to a hash map.
/// Returns:
/// * `hashMap`: The converted hash map
fn map(
map_or_list: Union<HashMap<String, ScriptValue>, Vec<ScriptValue>>,
) -> HashMap<String, ScriptValue> {
match map_or_list.into_left() {
Ok(map) => map,
Err(list) => list
.into_iter()
.enumerate()
.map(|(k, v)| (k.to_string(), v))
.collect(),
}
}
}

pub fn register_core_functions(app: &mut App) {
Expand Down
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