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FingerprintTransition

hopper_core::abi

Struct FingerprintTransition 

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pub struct FingerprintTransition {
    pub from: LayoutFingerprint,
    pub to: LayoutFingerprint,
}
Expand description

Pair of fingerprints for asserting version transitions.

Used in migration paths to prove that a layout_id changed between the old and new version (required for safe append-only evolution).

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§from: LayoutFingerprint§to: LayoutFingerprint

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impl FingerprintTransition

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pub const fn new(from: LayoutFingerprint, to: LayoutFingerprint) -> Self

Create a transition pair.

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pub const fn assert_valid(&self)

Assert the transition is valid: fingerprints must differ. Call this as a const assertion in your migration code.

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impl<T> Any for T
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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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fn borrow(&self) -> &T

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

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impl<T> From<T> for T

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fn from(t: T) -> T

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fn into(self) -> U

Calls U::from(self).

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type Error = Infallible

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impl<T, U> TryInto<U> for T
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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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