Enum CapabilityBit 

#[repr(u32)]
pub enum CapabilityBit {
    ReadsFs = 0,
    WritesFs = 1,
    Network = 2,
    ReadsClock = 3,
    ReadsEnv = 4,
    UsesRng = 5,
}

Canonical assignment of capability bits to stable bit positions.

Each variant’s discriminant is the bit index the compiled backends key on: the cranelift CapabilityVtable slots a host fn at cap_bit, the LLVM / wasm host boundaries consult the same index, and the wasm __relon_check_cap import receives it. Hosts registering a #native function tag the registration with the matching bit.

Discriminants are stable: adding a new capability appends a new variant rather than reshuffling existing values, so previously emitted modules keep validating against the same bit positions.

Variants

ReadsFs = 0

Filesystem reads. Mirrors Capabilities::reads_fs / NativeFnGate::reads_fs.

WritesFs = 1

Filesystem writes. Mirrors Capabilities::writes_fs / NativeFnGate::writes_fs.

Network = 2

Network access (sockets, HTTP, DNS). Mirrors Capabilities::network / NativeFnGate::network.

ReadsClock = 3

Wall / monotonic clock reads. Mirrors Capabilities::reads_clock / NativeFnGate::reads_clock.

ReadsEnv = 4

Process environment reads. Mirrors Capabilities::reads_env / NativeFnGate::reads_env.

UsesRng = 5

Random-number / non-deterministic source reads. Mirrors Capabilities::uses_rng / NativeFnGate::uses_rng.

Implementations

impl CapabilityBit

pub fn bit_index(self) -> u32

Stable bit index this capability claims. Used by the cranelift vtable and LLVM / wasm host-boundary checks to key the same capability across backends.

pub fn as_str(self) -> &'static str

Stable, audit-visible string label for this capability. Mirrors the NativeFnGate::missing_bits field-name strings so historical diagnostics keep the same wording.

pub fn deny_message(self) -> String

Human-readable denial message for the reason field of RuntimeError::CapabilityDenied. The dominant (and only Capabilities-produced) case: the fn declared this bit but the caller never granted it.

Trait Implementations

impl Clone for CapabilityBit

fn clone(&self) -> CapabilityBit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CapabilityBit

impl Debug for CapabilityBit

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

Formats the value using the given formatter.

impl Eq for CapabilityBit

impl PartialEq for CapabilityBit

fn eq(&self, other: &CapabilityBit) -> 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 StructuralPartialEq for CapabilityBit