odra::interface

[zie1ony]

Consider allowing multiple trait implementations on a module.

trait ContractDef {
    fn def() -> Vec<String>;
}

// #[odra::interface]
trait ERC20Interface {
    fn transfer(&mut self);
    fn balance_of(&self);
}

// #[autogenerated]
impl ContractDef for dyn ERC20Interface {
    fn def() -> Vec<String> {
        vec![
            String::from("transfer"),
            String::from("balance_of")
        ]
    }
}

// #[odra::interface]
trait ERC20MetadataInterface {
    fn name(&self);
}

// #[autogenerated]
impl ContractDef for dyn ERC20MetadataInterface {
    fn def() -> Vec<String> {
        vec![
            String::from("name"),
        ]
    }
}

// #[odra::module]
struct Token;

impl ERC20Interface for Token {
    fn transfer(&mut self) {}
    fn balance_of(&self) {}
}

impl ERC20MetadataInterface for Token {
    fn name(&self) {}
}

// #[autogenerated]
impl ContractDef for Token {
    fn def() -> Vec<String> {
        let mut def = Vec::new();
        def.extend_from_slice(&<dyn ERC20Interface as ContractDef>::def());
        def.extend_from_slice(&<dyn ERC20MetadataInterface as ContractDef>::def());
        def
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_works() {
        assert_eq!(Token::def(), vec![
            String::from("transfer"),
            String::from("balance_of"),
            String::from("name"),
        ]);
    }
}