Enum CtGatePosture 

#[non_exhaustive]
pub enum CtGatePosture {
    HardwareSpeculationBarrier,
    HardwareSpeculationBarrierBuildAsserted,
    HardwareSpeculationBarrierUnattested,
    OrderingFence,
    CompilerFenceOnly,
}

Constant-time result-gate barrier posture for this build and target.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

HardwareSpeculationBarrier

The target uses a native speculation barrier before public CT success/failure or equality-result branches.

HardwareSpeculationBarrierBuildAsserted

The target is treated as having an effective speculation barrier only because the build provided an explicit operator attestation cfg.

On AArch64, this is reported when the build sets base64_ng_aarch64_csdb_attested. It remains distinct from Self::HardwareSpeculationBarrier so logs preserve the evidence chain instead of making a build assertion look like a native target guarantee.

HardwareSpeculationBarrierUnattested

The target emits a hardware speculation-barrier sequence whose effectiveness depends on platform or core-level attestation.

On AArch64 this uses isb sy plus the CSDB hint encoding. Full CSDB effectiveness depends on the deployed ARM architecture level; older cores may treat the hint as a no-op.

OrderingFence

The target uses an ordering fence where the base ISA does not provide a canonical speculation barrier.

CompilerFenceOnly

The target uses compiler fences only.

Implementations

impl CtGatePosture

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

Returns the stable lowercase identifier for this CT gate posture.

Trait Implementations

impl Clone for CtGatePosture

fn clone(&self) -> CtGatePosture

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CtGatePosture

impl Debug for CtGatePosture

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

Formats the value using the given formatter.

impl Display for CtGatePosture

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

Formats the value using the given formatter.

impl Eq for CtGatePosture

impl PartialEq for CtGatePosture

fn eq(&self, other: &CtGatePosture) -> 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 CtGatePosture