Struct ProofObligation 

pub struct ProofObligation {
    pub obligation_type: ObligationType,
    pub property: String,
    pub formal: Option<String>,
    pub tolerance: Option<f64>,
    pub applies_to: Option<AppliesTo>,
    pub lean: Option<LeanProof>,
    pub requires: Option<String>,
    pub applies_to_phase: Option<String>,
    pub parent_contract: Option<String>,
}

A proof obligation derived from an equation.

26 obligation types: 19 property types plus 7 Design by Contract types (precondition, postcondition, frame, loop_invariant, loop_variant, old_state, subcontract).

Fields

obligation_type: ObligationType

Obligation category. Defaults to Invariant for legacy contracts that predate the DbC split (e.g. eval-harness-humaneval-v1, publish-manifest-v1) which ship with just property:/formal:.

property: String

Human-readable statement of what must hold. Alias statement accepted for legacy diagnostic contracts (e.g. decode-hot-path-prefix-cache-diagnostic-v1) whose POs predate the canonical property: naming.

formal: Option<String>

Formal predicate (Rust/Lean syntax). Alias verification accepted for legacy contracts that ship a shell/pmat-query check instead of a formal predicate.

tolerance: Option<f64>

applies_to: Option<AppliesTo>

lean: Option<LeanProof>

Phase 7: Lean 4 theorem proving metadata.

requires: Option<String>

Postcondition only: links to a precondition obligation ID.

applies_to_phase: Option<String>

Loop invariant/variant only: references a kernel_structure.phases[] name.

parent_contract: Option<String>

Subcontract only: contract stem being refined (must be in metadata.depends_on).

Trait Implementations

impl Clone for ProofObligation

fn clone(&self) -> ProofObligation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProofObligation

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

Formats the value using the given formatter.

impl Default for ProofObligation

fn default() -> ProofObligation

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProofObligation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ProofObligation

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

where __S: Serializer,

Serialize this value into the given Serde serializer.