Update copyright headers to reference both MIT and Apache 2.0 licenses.#26
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## Summary
Extends the Boole language pipeline with new language features, curated
benchmark
targets anchored to dalek-lite (Curve25519/Ed25519), and a testing
infrastructure
upgrade across all Boole seeds.
## Language features
**`Sequence T` type and slicing ops**
- `toCoreMonoType` handles `.Sequence _ elem → .tcons "Sequence" [elem]`
- All 8 Core inherited ops wired up in `Verify.lean`
- Three Boole-specific wrappers: `Sequence.skip`, `Sequence.dropFirst`,
`Sequence.subrange`
- Typed empty-sequence constants:
`Sequence.empty_bv8/bv16/bv32/bv64/int` — each
needs a distinct token since 0-ary polymorphic `Sequence.empty` has no
arguments
to infer the type from
**Bitvector loop variables** (`for i : bvN := init to limit`)
- `for_to_by` and `for_downto_by` dispatch guard/step/increment to
`Bv{N}.ULe/Add/Sub` when the loop variable is a bitvector type
**`decreases` annotations**
- `for v := init to/downto limit` accepts an optional `decreases e`
clause;
forwarded to the Core while-loop measure field and actively verified by
cvc5
- Functions and procedures accept an optional `decreases e` clause using
Core's
existing `Measure` category — no new grammar category introduced
- All three forms reuse Core's single `measure_mk` op; no duplicate
constructs
- Function termination is verified by strata-org#1092; procedure-level `decreases`
is
silently dropped with a `dbg_trace` warning pending int-based
termination support
**Lambda abstraction and application**
- `fun x : T => body` lowers to nested Core `.abs` nodes
- `(f)(x)` lowers to `.app () f x`
**Inline `let`-block postconditions**
- `let v := e in body` in spec/ensures positions lowers via
`withBVarExprs`
**`choose` assignment**
- `w := choose z : T :: pred(z)` lowers to `havoc w; assume pred[z/w]`
**Bitvector comparisons**
- Unsigned (`<`, `<=`, `>`, `>=`) default to `Bv{N}.ULt/ULe/UGt/UGe` via
`toBvCmpOp`
- Signed (`<s`, `<=s`, `>s`, `>=s`) lower to `Bv{N}.SLt/SLe/SGt/SGe`
## New seeds
- `embedded_postcondition.lean` — inline let-block in `ensures`
- `montgomery_loop_invariant.lean` — relational while-loop invariant;
linear
arithmetic case verifies via cvc5 and `smtVCsCorrect`
- `scalar_reduce.lean` — B2 `reduce()` axiom with abstract types
- `sha256_compact_indexed.lean` — SHA-256 compact port (indexed
`Sequence`
encoding); all 19 VCs pass; loop counters use `int` (faithful to Rust's
`usize`
semantics, avoids uninterpreted cast to `Sequence` index); remaining
gaps:
iterator protocol (strata-org#27), fixed-size array syntax (strata-org#25), slice types
(strata-org#26)
Fully implemented seeds graduated from `FeatureRequests/` to the main
Boole test
folder: `early_return.lean`, `choose_operator.lean`,
`bitvector_ops.lean`,
`embedded_postcondition.lean`.
## Seed test infrastructure
Replaced `#guard_msgs (drop info) in` with explicit `/-- info: ... -/` +
`#guard_msgs in` across all Boole seeds. Added `(options := .quiet)`
uniformly.
## Documentation
- New `docs/BooleBenchmarks.md`: five real-world benchmark targets from
dalek-lite
- Updated `docs/BooleFeatureRequests.md`: all new seeds in inventory
table,
implemented features extended
By submitting this pull request, I confirm that you can use, modify,
copy, and
redistribute this contribution, under the terms of your choice.
---------
Co-authored-by: Michael Tautschnig <mt@debian.org>
Co-authored-by: Aaron Tomb <aarotomb@amazon.com>
Co-authored-by: Kiro <kiro-agent@users.noreply.github.com>
Co-authored-by: Juneyoung Lee <136006969+aqjune-aws@users.noreply.github.com>
Co-authored-by: keyboardDrummer-bot <keyboardDrummer-bot@users.noreply.github.com>
Co-authored-by: Mikaël Mayer <MikaelMayer@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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Update copyright headers to reference both MIT and Apache 2.0 licenses.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.