Trait HookedElement 

pub trait HookedElement:
    UseStateHook
    + UseEffectHook
    + UseMemoHook
    + UseRefHook
    + UseCallbackHook {
    // Required methods
    fn _hooks_ref(&self) -> &RefCell<Vec<Box<dyn Hook>>>;
    fn _hook_index(&self) -> usize;
    fn _set_hook_index(&self, index: usize);
    fn _prev(&self) -> usize;
    fn _set_prev(&self, prev: usize);

    // Provided methods
    fn _next_hook_index(&self) -> usize { ... }
    fn _reset(&self) { ... }
}

HookedElement trait - 管理组件的hooks 使用内部可变性模式，使得hooks可以在&self上调用

自动实现了 UseStateHook, UseEffectHook, UseMemoHook

Required Methods

fn _hooks_ref(&self) -> &RefCell<Vec<Box<dyn Hook>>>

Get access to the hooks RefCell

fn _hook_index(&self) -> usize

Get the current hook index

fn _set_hook_index(&self, index: usize)

Set the hook index

fn _prev(&self) -> usize

Get the previous hook count

fn _set_prev(&self, prev: usize)

Set the previous hook count

Provided Methods

fn _next_hook_index(&self) -> usize

Increment hook index and return the old value

fn _reset(&self)

Reset hook state at the start of render

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors