structural-convert 0.13.0

Derive conversion traits (From, Into, TryFrom, TryInto) when fields are structurally similar in enums or structs
Documentation 
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use structural_convert::StructuralConvert;

#[test]
fn variant_is_unit_non_targeted() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs))]
    enum Rhs {
        #[convert(try_into(rename = "X"))]
        A,
        B,
    }

    #[derive(Debug, PartialEq)]
    enum Lhs {
        X,
        B,
    }

    assert_eq!(Lhs::X, Rhs::A.try_into().unwrap());
    assert_eq!(Lhs::B, Rhs::B.try_into().unwrap());
}

#[test]
fn variant_is_unit_targeted() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs1), try_into(Lhs2))]
    enum Rhs {
        #[convert(try_into(Lhs1, rename = "X"), try_into(Lhs2))]
        A,
        B,
    }

    #[derive(Debug, PartialEq)]
    enum Lhs1 {
        X,
        B,
    }

    #[derive(Debug, PartialEq)]
    enum Lhs2 {
        A,
        B,
    }

    assert_eq!(Lhs1::X, Rhs::A.try_into().unwrap());
    assert_eq!(Lhs1::B, Rhs::B.try_into().unwrap());

    assert_eq!(Lhs2::A, Rhs::A.try_into().unwrap());
    assert_eq!(Lhs2::B, Rhs::B.try_into().unwrap());
}

#[test]
fn variant_is_unnamed() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs))]
    enum Rhs {
        #[convert(try_into(rename = "X"))]
        A(i8, u32),
    }

    #[derive(Debug, PartialEq)]
    enum Lhs {
        X(i32, u32),
    }

    assert_eq!(Lhs::X(1, 2), Rhs::A(1, 2).try_into().unwrap());
}

#[test]
fn variant_is_named() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs))]
    enum Rhs {
        #[convert(try_into(rename = "X"))]
        A { z: i8, x: u32 },
    }

    #[derive(Debug, PartialEq)]
    enum Lhs {
        X { z: i32, x: u32 },
    }

    assert_eq!(
        Lhs::X { z: 1, x: 2 },
        Rhs::A { z: 1, x: 2 }.try_into().unwrap()
    );
}

#[test]
fn fields_named_not_targeted() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs))]
    enum Rhs {
        A {
            #[convert(try_into(rename = "z"))]
            a: i8,
            x: u32,
        },
    }

    #[derive(Debug, PartialEq)]
    enum Lhs {
        A { z: i8, x: u32 },
    }

    assert_eq!(
        Lhs::A { z: 1, x: 2 },
        Rhs::A { a: 1, x: 2 }.try_into().unwrap()
    );
}

#[test]
fn fields_named_targeted() {
    #[derive(Debug, PartialEq, StructuralConvert)]
    #[convert(try_into(Lhs1), try_into(Lhs2))]
    enum Rhs {
        A {
            #[convert(try_into(Lhs1::A, rename = "z"))]
            a: i8,
            x: u32,
        },
    }

    #[derive(Debug, PartialEq)]
    enum Lhs1 {
        A { z: i8, x: u32 },
    }

    #[derive(Debug, PartialEq)]
    enum Lhs2 {
        A { a: i8, x: u32 },
    }

    assert_eq!(
        Lhs1::A { z: 1, x: 2 },
        Rhs::A { a: 1, x: 2 }.try_into().unwrap()
    );
    assert_eq!(
        Lhs2::A { a: 1, x: 2 },
        Rhs::A { a: 1, x: 2 }.try_into().unwrap()
    );
}