Derive Macro roopes::prelude::Visitor

#[derive(Visitor)]

Creates a new trait for user code to implement on the specified enum. This trait requires implementors to implement handlers for all the specified variants in the given enum.

Examples

#[macro_use]
use roopes::prelude::*;

#[derive(Visitor)]
enum TestEnum
{
    Integer
    {
        value: i32,
    },
    Nothing,
}

struct Implementor;
impl TestEnumVisitor for Implementor
{
    fn visit_integer(
        &self,
        value: &i32,
    )
    {
        println!("got {value}");
    }

    fn visit_nothing(&self)
    {
        println!("got Nothing");
    }
}

let test_visitor = TestEnumAcceptor::new(Implementor);
test_visitor.accept(&TestEnum::Integer { value: 10 });
test_visitor.accept(&TestEnum::Nothing);