Derive Macro composable::derive_macros::RecursiveReducer

#[derive(RecursiveReducer)]
{
    // Attributes available to this derive:
    #[reducer]
}

Compiler Errors

The are a few common mistakes that will produce well-known compiler errors

the trait bound xxxx::State: composable::RecursiveReducer is not satisfied

| #[derive(RecursiveReducer)]
|          ^^^^^^^^^^^^^^^^ the trait `composable::RecursiveReducer` is not implemented for `State`
|
= note: this error originates in the derive macro `RecursiveReducer`

Cause: You haven’t yet written an impl RecursiveReducer for the type you added #[derive(RecursiveReducer)] to.

conflicting implementation for State

| #[derive(RecursiveReducer)]
|          ^^^^^^^^^^^^^^^^ conflicting implementation for `State`
...
| impl Reducer for State {
| ---------------------- first implementation here
|
= note: this error originates in the derive macro `RecursiveReducer`

Cause: You declared an impl Reducer, perhaps out of habit, rather than an impl RecursiveReducer.

the trait bound …: composable::Reducer is not satisfied

| #[derive(RecursiveReducer)]
|          ^^^^^^^^^^^^^^^^ the trait `composable::Reducer` is not implemented for `…`
|
= help: the following other types implement trait `composable::Reducer`:
          ⋮
= note: this error originates in the derive macro `RecursiveReducer`

where … is replaced with the type of one of the struct’s fields in the error message.

Cause: A #[reducer(skip)] attribute is missing.

type mismatch resolving <impl Effects<Action = Action> as Effects>::Action == Action

| #[derive(RecursiveReducer)]
|          ^^^^^^^^^^^^^^^^ expected `child::Action`, found `parent::Action`
|
= note: `parent::Action` and `child::Action` have similar names, but are actually distinct types

Cause: … From

the trait bound menu::Action: composable::From<winit::Action> is not satisfied

| #[derive(RecursiveReducer)]
|          ^^^^^^^^^^^^^^^^ the trait `composable::From<parent::Action>` is not implemented for `child::Action`
|

Cause: … TryInto

• Or there is no wrapper around a child action for the From macro to wrap a child action with