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Claim ยท cairn 0.5.2
cairn^1114 A view never moves a written key
An invariant of cairn 0.5.2.
- Id
cairn^1114- Kind
- invariant
- Reads as
- proved
- Version
- 0.5.2
What it says
A value in a view the app fetched, which may be stale (fetched before a write, or from a server that hasn't indexed it yet), never changes what a key written this session shows, or its confirmed value.
Evidence
| proved | init | Cairn.Optimistic.Claims.viewKeepsWritten.init |
| proved | step | Cairn.Optimistic.Claims.viewKeepsWritten.step |
| proved | receive | Cairn.Optimistic.Claims.viewKeepsWritten.receive |
| proved | reachable | Cairn.Optimistic.Claims.viewKeepsWritten.reachable |
| proved | reachableAll | Cairn.Optimistic.Claims.viewKeepsWritten.reachableAll |
| fuzzed | Not shown yet: the claim-driven fuzzer held it in every random sequence (docs/fuzz.md). A CI step will publish it (#95). | |
| tested | Not shown yet: the running app matched the model at every step that exercised it (docs/conformance.md). A CI step will publish it (#95). | |
Where it's defined
- Declaration
Cairn.Optimistic.Claims.viewKeepsWritten- Module
Cairn.Optimistic.Claims- Source
lean/Cairn/Optimistic/Claims.lean:233atv0.5.2- Machine
Cairn.Optimistic.Claims.machine- Statement
Cairn.Optimistic.Claims.viewKeepsWritten.holds- Statement hash
e847fec11b018125
Ledger
cairn^1114 is active in this version's claims.lock, statement e847fec11b018125. An id never moves or changes meaning.