Struct frame_support::traits::TryMapSuccess

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pub struct TryMapSuccess<Orig, Mutator>(_);

Expand description

A derivative EnsureOrigin implementation. It mutates the Success result of an Original implementation with a given Mutator, allowing the possibility of an error to be returned from the mutator.

NOTE: This is strictly worse performance than MapSuccess since it clones the original origin value. If possible, use MapSuccess instead.

Trait Implementations

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impl<O: Clone, Original: EnsureOrigin<O>, Mutator: TryMorph<Original::Success>> EnsureOrigin<O> for TryMapSuccess<Original, Mutator>

type Success = <Mutator as TryMorph<<Original as EnsureOrigin<O>>::Success>>::Outcome

A return type.

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fn try_origin(o: O) -> Result<Mutator::Outcome, O>

Perform the origin check.

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fn try_successful_origin() -> Result<O, ()>

Attempt to get an outer origin capable of passing try_origin check. May return Err if it is impossible. Read more

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fn ensure_origin(o: OuterOrigin) -> Result<Self::Success, BadOrigin>

Perform the origin check.

Auto Trait Implementations

impl<Orig, Mutator> RefUnwindSafe for TryMapSuccess<Orig, Mutator>where
Mutator: RefUnwindSafe,
Orig: RefUnwindSafe,

impl<Orig, Mutator> Send for TryMapSuccess<Orig, Mutator>where
Mutator: Send,
Orig: Send,

impl<Orig, Mutator> Sync for TryMapSuccess<Orig, Mutator>where
Mutator: Sync,
Orig: Sync,

impl<Orig, Mutator> Unpin for TryMapSuccess<Orig, Mutator>where
Mutator: Unpin,
Orig: Unpin,

impl<Orig, Mutator> UnwindSafe for TryMapSuccess<Orig, Mutator>where
Mutator: UnwindSafe,
Orig: UnwindSafe,

Blanket Implementations

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impl<T> Any for Twhere
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CheckedConversion for T

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fn checked_from<T>(t: T) -> Option<Self>where
Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

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fn checked_into<T>(self) -> Option<T>where
Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> Downcast for Twhere
T: Any,

fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

impl<T> DowncastSync for Twhere
T: Any + Send + Sync,

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

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