CanCreate

frame_support::traits::tokens::asset_ops::common_strategies

Struct CanCreate 

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pub struct CanCreate<Condition = ()>(pub Condition);
Expand description

The CanCreate strategy represents the ability to create an asset. It is both an inspect and update strategy.

  • As the inspect strategy, it returns bool.
  • As the update strategy, it accepts bool.

By default, this strategy means the ability to create an asset “in general”. However, a user can define several variants of this strategy by supplying the Condition type. Using the Condition value, we are formulating the question, “Can this be created under the given condition?”. For instance, “Can a specific user create an asset?”.

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§0: Condition

Trait Implementations§

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impl Default for CanCreate<()>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<Condition> InspectStrategy for CanCreate<Condition>

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type Value = bool

The value representing the asset’s state related to this InspectStrategy.
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impl<Condition> UpdateStrategy for CanCreate<Condition>

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type UpdateValue<'u> = bool

The value to update the asset’s state. Usually, it should be related to the corresponding InspectStrategy::Value. Read more
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type Success = ()

This type represents a successful asset state update. It will be in the Result type of the Update::update function.

Auto Trait Implementations§

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impl<Condition> Freeze for CanCreate<Condition>
where Condition: Freeze,

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impl<Condition> RefUnwindSafe for CanCreate<Condition>
where Condition: RefUnwindSafe,

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impl<Condition> Send for CanCreate<Condition>
where Condition: Send,

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impl<Condition> Sync for CanCreate<Condition>
where Condition: Sync,

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impl<Condition> Unpin for CanCreate<Condition>
where Condition: Unpin,

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impl<Condition> UnwindSafe for CanCreate<Condition>
where Condition: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where 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> AsCanUpdate for T
where T: UpdateStrategy,

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fn as_can_update(self) -> CanUpdate<T>

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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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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where Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more
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where U: DefensiveTruncateFrom<T>,

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fn defensive_truncate_into(self) -> U

Defensively truncate a value and convert it into its bounded form.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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where U: From<T>,

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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Cast reference.
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Cast reference.
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Cast mutable reference.
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Cast mutable reference.
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where Self: UniqueSaturatedFrom<T>,

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where Self: UniqueSaturatedInto<T>,

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The type returned in the event of a conversion error.
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Performs the conversion.
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where U: TryFrom<T>,

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Performs the conversion.
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where U: TryFromKey<T>,

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where T: Bounded, S: TryInto<T>,

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Consume self to return an equivalent value of T.
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where T: InspectStrategy,

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