Method join

crates/test-util/src/component_fuzz.rs:57–63

This is the `join` operation specified in [the canonical ABI](https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#flattening) for variant types.

(self, other: Self)

    /// ABI](https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#flattening) for
    /// variant types.
    fn join(self, other: Self) -> Self {
        match (self, other) {
            _ if self == other => self,
            (Self::I32, Self::F32) | (Self::F32, Self::I32) => Self::I32,
            _ => Self::I64,
        }
    }
}

impl fmt::Display for CoreType {