Struct frame_support::dispatch_context::Value

pub struct Value<'a, T> { /* private fields */ }

Abstraction over some optional value T that is stored in the dispatch context.

Implementations

impl<T> Value<'_, T>

pub fn get(&self) -> Option<&T>

Get the value as reference.

pub fn get_mut(&mut self) -> Option<&mut T>

Get the value as mutable reference.

pub fn set(&mut self, new_value: T)

Set to the given value.

Self::get and Self::get_mut will return new_value afterwards.

pub fn or_default(&mut self) -> &mut Twhere T: Default,

Returns a mutable reference to the value.

If the internal value isn’t initialized, this will set it to Default::default() before returning the mutable reference.

pub fn clear(&mut self)

Clear the internal value.

Self::get and Self::get_mut will return None afterwards.