to-values 0.1.0

Flatten values into ordered f32 feature vectors.
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#![cfg(feature = "derive")]

use to_values::ToInputVector;

#[derive(ToInputVector)]
struct Position {
    x: f32,
    y: f32,
}

#[derive(ToInputVector)]
struct Entity {
    position: Position,
    #[input(skip)]
    id: String,
    money: f32,
}

#[derive(ToInputVector)]
#[allow(dead_code)]
struct TupleEntity(f32, #[input(skip)] String, bool);

#[derive(ToInputVector)]
struct Generic<T>
where
    T: Clone,
{
    value: T,
}

#[derive(ToInputVector)]
struct Empty;

#[test]
fn derive_flattens_fields_and_honours_skips() {
    let entity = Entity {
        position: Position { x: 1.5, y: -2.0 },
        id: "entity-42".to_owned(),
        money: 10.0,
    };

    assert_eq!(entity.id, "entity-42");
    assert_eq!(entity.input_vector_len(), 3);
    assert_eq!(entity.to_input_vector(), vec![1.5, -2.0, 10.0]);
}

#[test]
fn derive_supports_tuple_unit_and_generic_structs() {
    assert_eq!(
        TupleEntity(2.0, "ignored".to_owned(), true).to_input_vector(),
        vec![2.0, 1.0]
    );
    assert!(Empty.to_input_vector().is_empty());
    assert_eq!(Generic { value: 7_u8 }.to_input_vector(), vec![7.0]);
}