Struct Scope 

pub struct Scope(/* private fields */);

A partition key for multi-agent / multi-tenant isolation.

Scope is a thin newtype around SmolStr (inline up to 23 bytes — most scope identifiers fit). Two scopes compare equal iff their string forms match byte-for-byte. There is no implicit fallback to a “default” scope — a Scope must be constructed explicitly.

Validation

The string must match ^[A-Za-z0-9_\-.]{1,128}$. This is enforced by Scope::new; the unchecked constructor is pub(crate) and only used by trusted internal call sites (deserialization of validated wire data).

Examples

use lunaris_core::Scope;
let s = Scope::new("acme.agent-42").unwrap();
assert_eq!(s.as_str(), "acme.agent-42");

Implementations

impl Scope

pub fn new(s: impl AsRef<str>) -> Result<Scope, ScopeError>

Construct a Scope from s, enforcing the validation regex ^[A-Za-z0-9_\-.]{1,128}$.

Returns Err(ScopeError::Invalid) on empty string, string longer than 128 bytes, or any character outside the allowed set.

pub fn as_str(&self) -> &str

Borrow the scope as a string slice.

pub fn as_bytes(&self) -> &[u8]

Borrow the scope as a byte slice.

pub fn is_valid_segment(segment: &str) -> bool

Is segment a legal sub-partition segment?

A segment is a non-empty run of [A-Za-z0-9_-]. Note . is EXCLUDED here even though Scope::new permits it in a whole scope, because . is the level separator (see child): a segment carrying its own . would forge an extra level. : and / are likewise excluded so a composed segment can never byte-alias the lunaris:{scope}:{kind}:{ulid} KV format.

pub fn child(&self, segment: &str) -> Result<Scope, ScopeError>

Compose a child sub-partition by appending a validated .{segment}.

segment must satisfy is_valid_segment; the full composed string is then re-validated by Scope::new (alphabet + 128-byte cap). Consequently self.as_str() is ALWAYS a byte-prefix of the returned child — this is the load-bearing isolation guarantee for multi-level memory (RFC 0001 sub-partitions): a caller can only NARROW into a sub-partition of its own scope, never escape to a sibling or parent.

Trait Implementations

impl AsRef<str> for Scope

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Scope

fn clone(&self) -> Scope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Scope

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Scope

RC-4 (v0.2 release-gate review): re-validate on the wire boundary.

The previous derived Deserialize with #[serde(transparent)] accepted any string, bypassing Scope::new’s regex. Internal deserialization sites (rows fetched from a future cloud-API backend, MQ envelopes that gain a scope field, etc.) would have trusted attacker-controlled bytes. This impl forces every wire-side Scope to clear Scope::new.

fn deserialize<D>(d: D) -> Result<Scope, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Scope

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

Formats the value using the given formatter.

impl Eq for Scope

impl Hash for Scope

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Scope

fn cmp(&self, other: &Scope) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Scope

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Scope

fn partial_cmp(&self, other: &Scope) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Scope

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Scope