Enum ArchiveMeta 

pub enum ArchiveMeta {
    NoMetadata,
    Index(MetaIndex),
}

What an archive has to say about metadata.

Deliberately not an Option and deliberately without Default. The two states below are different facts, and a reader that cannot tell them apart reports “searched, found nothing” about an archive it never searched. There is no unwrap_or_default() that can silently turn the first into the second.

Variants

NoMetadata

This archive carries no metadata section at all — it predates the module, or its writer sealed none. Nothing was searched; nothing can be concluded about what it does or does not contain.

Index(MetaIndex)

The section is present and decoded. It may hold zero rows, which is a genuine answer: this archive records nothing under any key.

Implementations

impl ArchiveMeta

pub fn index(&self) -> Option<&MetaIndex>

The index, or None when the archive has no section. Explicit by design: the caller has to name the absent case.

pub fn is_searchable(&self) -> bool

true when there was an index to search at all.

pub fn find_by_key(&self, key: &str) -> MetaSearch<'_>

Key search that keeps the distinction all the way to the call site.

pub fn find_by_prefix(&self, prefix: &str) -> MetaSearch<'_>

Prefix search that keeps the distinction all the way to the call site.

Trait Implementations

impl Clone for ArchiveMeta

fn clone(&self) -> ArchiveMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArchiveMeta

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

Formats the value using the given formatter.

impl PartialEq for ArchiveMeta

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ArchiveMeta