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MetaIndex

Struct MetaIndex 

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pub struct MetaIndex { /* private fields */ }
Expand description

A decoded META_MODULE section, held sorted by (key, relative_path).

Every query returns entry refs — borrows into this index — so a caller reads the index, decides, and only then extracts the one archive entry it wants.

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impl MetaIndex

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pub fn from_rows(rows: Vec<MetaEntry>) -> Self

Build from rows, restoring the on-disk sort. Public so a caller can query a table it just built without a round-trip through a file.

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

true when the section is present but records nothing. This is NOT the same as the archive having no section — see ArchiveMeta.

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pub fn iter(&self) -> Iter<'_, MetaEntry>

Every row, in on-disk order.

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pub fn find_by_key(&self, key: &str) -> &[MetaEntry]

All rows carrying exactly key, entry-scoped and archive-scoped alike.

A binary-searched range, not a scan: rows are stored key-major, so this is O(log n) to locate plus O(hits) to hand back.

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pub fn find_by_prefix(&self, prefix: &str) -> &[MetaEntry]

All rows whose key starts with prefix — also a contiguous range, for the same reason. An empty prefix matches everything.

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pub fn archive_value(&self, key: &str) -> Option<&MetaValue>

The archive-level value for key, if one was recorded.

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pub fn keys(&self) -> Vec<&str>

Distinct keys, in sorted order.

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pub fn to_table(&self) -> MetaTable

Back to an owned writer-side table — for re-sealing an archive without losing what it already recorded.

Trait Implementations§

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impl Clone for MetaIndex

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fn clone(&self) -> MetaIndex

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MetaIndex

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for MetaIndex

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fn eq(&self, other: &MetaIndex) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for MetaIndex

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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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> 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<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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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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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.