Implement choice

[matzipan]

Some things still to do:

• Rebase
• Fix compilation
• Fix the choice tests
• Check test failures
• Extension as parent
• Restriction as parent

Supersedes #20

[MarcAntoine-Arnaud]

In that case I expect more to retrieve an enum here.
The test is not easy to understand as a person has basically a first name and a last name, so it's not a choice, more a combination.

I think the example here is more relevant: https://www.w3schools.com/xml/el_choice.asp
Where. Person may have role employee or member.

So for me the expected code will be:

let model = Person::Employee("John".to_string());

// Generated part by xml-schema
enum Person {
  Employee(String),
  Member(String),
}

[MarcAntoine-Arnaud]

in that case I expect to have:

Person {
  parents: vec![Parent::Firstname("John".to_string())],
}

[matzipan]

Yup exactly, I just patched this in one commit just to get it to compile. I am currently working on making this a vector.

[matzipan]

Oh sorry I just implemented:

  let model = Person {
    firstname_list: vec!["John".to_string()],
    lastname_list: vec![],
  };

which i notice now is a bit different from what you imagined.

[matzipan]

I have some attempts which try to implement this as enum, you can see the last commit here: 740c37b

Unforuntately the test fails with:

thread 'choice_multiple' panicked at xml_schema/tests/choice.rs:99:3:
assertion `left == right` failed
  left: Gift { content: [] }
 right: Gift { content: [price_history(1), price_history(3)] }

So I probably got the yaserde config wrong :(

I will pause this work for now.