Enum ApprovalThreshold 

pub enum ApprovalThreshold {
    Approvals(u32),
    Unsatisfiable,
}

The approval bar an accepted ApprovalRequest must clear, as the mode resolves it against the session’s bound policy.

Returned by QuorumMode::effective_threshold and, wrapped, by QuorumMode::effective_threshold_for_session. Both variants are reachable; “this session has no ApprovalRequest yet” is not a variant here — that question is answered by the Option the session-level accessor returns, so the two cannot be confused.

The policy’s own inert case (threshold.value <= 0, which includes the schema default and therefore every session with no threshold rule at all) is not a variant either: the mode’s documented fallback for it is the ApprovalRequest’s own required_approvals, so it arrives here already resolved as Approvals(required_approvals). Surfacing macp_core::policy::rules::EffectiveThreshold::Inert instead would hand the fallback rule back to the caller, which is the re-implementation this accessor exists to delete (issue #146).

Deliberately not #[non_exhaustive], matching macp_core::policy::rules::EffectiveThreshold and for the same reason: a _ arm in a caller would silently reinterpret a future variant as one of these, and silently mis-handling a governance bar is the defect class issue #145 was. Adding a variant is a major cargo-semver-checks lint (enum_variant_added) and release-plz.toml sets semver_check = true, so it blocks the release PR rather than slipping out.

Variants

Approvals(u32)

This many Approve ballots seal a positive commitment.

Never zero, and for a session whose ApprovalRequest the mode accepted, never above the declared participant count: on_message constrains both the payload field and any policy replacement for it to 1..=participants.

Unsatisfiable

The bound policy admits no positive commitment at any approval count.

Reached by threshold.type: "weighted" (not implemented here), an unrecognised type, or a percentage over an empty participant set — see macp_core::policy::rules::EffectiveThreshold::Unsatisfiable. RegisterPolicy refuses the first two, so a session can only carry such a policy if the PolicyDefinition was constructed directly (or restored from a checkpoint that predates those checks). The third is not catchable at registration — there is no participant count there — and is blocked by QuorumMode::on_session_start rejecting an empty participant set. The mode seals neither outcome on such a session, positive or negative.

Trait Implementations

impl Clone for ApprovalThreshold

fn clone(&self) -> ApprovalThreshold

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ApprovalThreshold

impl Debug for ApprovalThreshold

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

Formats the value using the given formatter.

impl Eq for ApprovalThreshold

impl PartialEq for ApprovalThreshold

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ApprovalThreshold