panproto-mig 0.3.0

Migration engine for panproto
Documentation

panproto-mig

Migration engine for panproto.

This crate computes and applies schema migrations, transforming instances from one schema version to another while preserving data integrity through theory morphisms. The pipeline covers existence checking, compilation, lifting, composition, and inversion.

API

Item Description
Migration A migration mapping between source and target schemas
check_existence Theory-derived validation that a migration is well-formed
ExistenceReport Result of existence checking with errors list
compile Pre-compute surviving sets and remapping tables
lift_wtype Apply a compiled migration to a W-type instance
lift_functor Apply a compiled migration to a functor instance
compose Compose two sequential migrations into one
invert Construct the inverse of a bijective migration
MigError / ComposeError / InvertError / LiftError Error types

Example

use panproto_mig::{Migration, compile, lift_wtype, check_existence};

let report = check_existence(&protocol, &src, &tgt, &migration, &theories);
assert!(report.valid);

let compiled = compile(&src, &tgt, &migration)?;
let lifted = lift_wtype(&compiled, &src, &tgt, &instance)?;

License

MIT