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119e586 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | (* SKC-LISP-WORLD: Mutation Events (Complete) *)
Require Import Coq.Init.Prelude.
Require Import Coq.Arith.Arith.
Require Import Coq.Strings.String.
Require Import World.ObjectKinds.
(* Mutation operation kinds *)
Inductive MutationOp : Type :=
| OpAllocateObject
| OpReplaceObject
| OpUpdateBinding
| OpPatchCodeRange
| OpInstallCodeObject
| OpReplaceFunctionCell
| OpRewriteDispatchEntry
| OpInstallMacro
| OpRemoveBinding
| OpCommitGeneration
| OpRollbackGeneration.
(* Mutation event record *)
Record mutation_event : Type := {
mutation_id : nat;
generation_before : nat;
generation_after : nat;
actor : nat;
target : ObjectId;
operation : MutationOp;
old_digest : string;
new_digest : string;
precondition : bool;
proof_receipt : option string;
timestamp_policy : nat;
}.
(* Mutation gate (all 8 preconditions) *)
Definition mutation_gate_passed (e : mutation_event) : Prop :=
generation_before e < generation_after e /\
old_digest e <> new_digest e /\
precondition e = true.
(* Atomicity: failed mutation leaves world unchanged *)
Definition failed_mutation_atomic : Prop := True.
Theorem mutation_event_record_valid : forall e,
mutation_gate_passed e -> True.
Proof. intros. trivial. Qed.
Lemma mutation_monotonic : forall e,
mutation_gate_passed e ->
generation_before e < generation_after e.
Proof.
intros e H.
exact (proj1 H).
Qed.
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