Struct Capability 

pub struct Capability {
    pub level: u32,
    pub description: String,
}

A capability token representing a permission level for IO operations.

Fields

level: u32

The permission level (higher = more privileged).

description: String

Human-readable description.

Implementations

impl Capability

pub fn new(level: u32, description: impl Into<String>) -> Self

Create a new capability token.

pub fn null() -> Self

Null capability (no permissions).

pub fn read_only() -> Self

Read-only capability.

pub fn read_write() -> Self

Read-write capability.

pub fn full() -> Self

Full (root) capability.

pub fn is_sufficient_for(&self, required: u32) -> bool

Check if this capability is sufficient for the required level.

pub fn attenuate(&self, max_level: u32) -> Capability

Attenuate (reduce) the capability to a lower level.

Trait Implementations

impl Clone for Capability

fn clone(&self) -> Capability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Capability

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

Formats the value using the given formatter.

impl PartialEq for Capability

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Capability

impl StructuralPartialEq for Capability