rune 0.14.2

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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prelude!();

use VmErrorKind::*;

#[test]
fn test_from_value_object_like() {
    #[derive(FromValue)]
    struct Proxy {
        field: u32,
    }

    let value: Proxy = rune! {
        struct Ignored;
        struct Value { field, ignored }
        Value { field: 42, ignored: Ignored }
    };

    assert_eq!(value.field, 42);

    let value: Proxy = rune! {
        struct Ignored;
        #{ field: 42, ignored: Ignored }
    };

    assert_eq!(value.field, 42);
}

#[test]
fn test_from_value_tuple_like() {
    #[derive(FromValue)]
    struct Proxy(u32);

    let value: Proxy = rune! {
        struct Value(field);
        Value(42)
    };

    assert_eq!(value.0, 42);

    let value: Proxy = rune!((42,));
    assert_eq!(value.0, 42);
}

#[test]
fn test_missing_dynamic_field() {
    #[derive(Debug, FromValue)]
    struct ProxyStruct {
        #[allow(dead_code)]
        missing: u32,
    }

    assert_vm_error!(
        ProxyStruct => r#"
        struct Ignored;
        struct Value { other, ignored }
        Value { other: 42, ignored: Ignored }
        "#,
        MissingStructField { target, name } => {
            assert!(target.ends_with("::test_missing_dynamic_field::ProxyStruct"));
            assert_eq!(name, "missing");
        }
    );

    #[derive(Debug, FromValue)]
    #[allow(unused)]
    struct ProxyTuple(u32, u32);

    assert_vm_error!(
        ProxyTuple => r#"
        struct Ignored;
        struct Value(other);
        Value(42)
        "#,
        MissingTupleIndex { target, index } => {
            assert!(target.ends_with("::test_missing_dynamic_field::ProxyTuple"));
            assert_eq!(index, 1);
        }
    );
}

#[test]
fn test_enum_proxy() {
    #[derive(Debug, PartialEq, Eq, FromValue)]
    enum Proxy {
        Empty,
        Tuple(String),
        Struct { field: String },
    }

    let proxy: Proxy = rune! {
        enum Proxy { Empty, Tuple(a), Struct { field } }
        Proxy::Empty
    };

    assert_eq!(proxy, Proxy::Empty);

    let proxy: Proxy = rune! {
        enum Proxy { Empty, Tuple(a), Struct { field } }
        Proxy::Tuple("Hello World")
    };

    assert_eq!(proxy, Proxy::Tuple(String::from("Hello World")));

    let proxy: Proxy = rune! {
        enum Proxy { Empty, Tuple(a), Struct { field } }
        Proxy::Struct { field: "Hello World" }
    };

    assert_eq!(
        proxy,
        Proxy::Struct {
            field: String::from("Hello World")
        }
    );
}