Struct finality_grandpa::voter_set::VoterSet [−][src]
Expand description
A (non-empty) set of voters and associated weights.
A VoterSet
identifies all voters that are permitted to vote in a round
of the protocol and their associated weights. A VoterSet
is furthermore
equipped with a total order, given by the ordering of the voter’s IDs.
Implementations
Create a voter set from a weight distribution produced by the given iterator.
If the distribution contains multiple weights for the same voter ID, they are understood to be partial weights and are accumulated. As a result, the order in which the iterator produces the weights is irrelevant.
Returns None
if the iterator does not yield a valid voter set, which is
the case if it either produced no non-zero weights or, i.e. the voter set
would be empty, or if the total voter weight exceeds u64::MAX
.
Get the voter info for the voter with the given ID, if any.
Get the size of the set.
Get the nth voter in the set, modulo the size of the set, as per the associated total order.
Get the nth voter in the set, if any.
Returns None
if n >= len
.
Get the threshold vote weight required for supermajority w.r.t. this set of voters.
Get the total weight of all voters.
Trait Implementations
Auto Trait Implementations
impl<Id> RefUnwindSafe for VoterSet<Id> where
Id: RefUnwindSafe,
impl<Id> UnwindSafe for VoterSet<Id> where
Id: UnwindSafe + RefUnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
Causes self
to use its Binary
implementation when Debug
-formatted.
Causes self
to use its Display
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Debug
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Causes self
to use its LowerExp
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Causes self
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Causes self
to use its Octal
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Causes self
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Causes self
to use its UpperExp
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Causes self
to use its UpperHex
implementation when
Debug
-formatted. Read more
Pipes by value. This is generally the method you want to use. Read more
Borrows self
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Mutably borrows self
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Borrows self
, then passes self.borrow()
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Mutably borrows self
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, then passes self.as_ref()
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fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: AsRef<T>,
T: 'a,
R: 'a,
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Self: AsRef<T>,
T: 'a,
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Self: Borrow<T>,
T: 'a,
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T: 'a,
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Self: Deref,
R: 'a,
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Self: Deref,
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Calls .tap()
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Provides immutable access to the reference for inspection.
Calls tap_ref
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Provides mutable access to the reference for modification.
Calls tap_ref_mut
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Calls tap_borrow
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fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
Provides mutable access to the borrow for modification.
Immutably dereferences self
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fn tap_deref_dbg<F, R>(self, func: F) -> Self where
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F: FnOnce(&Self::Target) -> R,
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
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F: FnOnce(&Self::Target) -> R,
Calls tap_deref
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F: FnOnce(&mut Self::Target) -> R,
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F: FnOnce(&mut Self::Target) -> R,
Mutably dereferences self
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