Brummel
52ff8738b8
First iteration of the intrinsic-bodies milestone. Introduces the
Form-A `(intrinsic)` body marker as a new leaf AST term and wires it
through surface, checker, codegen, and a kernel_stub ratifier. The
prelude migration + hard-lockstep pin + dead-path removal are .2.
What landed (8 tasks):
Task 1 — Term::Intrinsic unit variant (ast.rs), tag "t":"intrinsic"
via the enum's rename_all=lowercase. Additive: no existing fixture
carries it, hashes bit-identical. In-core exhaustive-match arms
(canonical/hash/visit/pretty/desugar/workspace) added as leaves.
Task 2 — surface parse + print: (intrinsic) as a fn body-slot clause
and a lambda positional body, mapped to/from Term::Intrinsic.
Task 3 — cross-crate walker sweep (check/codegen/prose/ail-main):
leaf no-op/identity arms at every no-wildcard Term match the
compiler flagged.
Task 4 — checker: new Env.current_module_kernel_tier flag (m.kernel
|| m.name=="prelude"), set alongside current_module. A def whose
body is intrinsic (top-level fn OR instance-method lambda, via the
shared is_intrinsic_body helper) is checked signature-only; an
intrinsic body outside kernel-tier/prelude is rejected with
intrinsic-outside-kernel-tier.
Task 5 — codegen: an intrinsic-bodied fn routes through the existing
try_emit_primitive_instance_body / intercepts::lookup path; if no
intercept fired it is an internal error, never a lower_term
fallthrough. lower_term and the synth walker get Term::Intrinsic
internal-error arms (an intrinsic body reaching either is an
escape bug).
Task 6 — answer intercept (ret i64 42) registered in INTERCEPTS;
the `answer : () -> Int` intrinsic added to STUB_AIL;
examples/kernel_intrinsic_smoke.ail added so schema_coverage
observes Term::Intrinsic in the examples/ corpus.
Task 7 — E2E ratifier: examples/kernel_answer.ail calls
kernel_stub.answer and prints 42; answer_intrinsic_builds_and_runs_printing_42
asserts it end-to-end (source → native).
Task 8 — design/contracts/0002-data-model.md gains the
{ "t": "intrinsic" } Term entry + fn/lam prose; form_a.md grammar
note updated.
Verification:
cargo test --workspace → 669 passed, 0 failed (baseline 667 +2:
intrinsic_in_user_module_is_rejected, answer_intrinsic_builds_and_runs_printing_42).
bench/check.py + bench/compile_check.py → 0 regressed.
Reject E2E (subprocess ail check --json, exit 1, code
intrinsic-outside-kernel-tier) GREEN.
Round-trip + hash pins GREEN — Term::Intrinsic is additive, no
existing fixture carries it, no hash moved.
Three implementation completions beyond the plan (all behaviour-
preserving, surfaced during execution):
1. The signature-only skip had to apply at the mono pass's two
synth-on-body re-entry sites (collect_mono_targets,
collect_residuals_ordered), not only check_fn — else an intrinsic
body hits synth's Term::Intrinsic internal-error guard. Repaired by
extracting the shared crate::is_intrinsic_body helper and applying
it at all three synth-on-body paths. Not a representation surprise:
the same signature-only treatment, more call sites.
2. The compiler-enumerated exhaustive-match set was broader than the
plan's named grep set (the plan anticipated this and made the sweep
compile-driven). Extra leaf arms in core desugar/workspace, check
reuse-as + qualify_workspace_term, codegen synth_with_extras,
ail/src/main.rs, and four test targets.
3. Fixture corrections: emit_answer needed the body-close
(block terminator) the plan snippet omitted; kernel_answer.ail's
main is (ret Unit)(effects IO) using (app print ...) since
io/print_int does not exist (the plan flagged this for the
implementer to resolve against real effect-op names).
IR snapshots (hello/sum/list/max3/ws_main.ll) refreshed: purely
additive @ail_kernel_stub_answer fn+adapter+closure, emitted into
every workspace exactly as the pre-existing @ail_kernel_stub_new
already was (kernel_stub is auto-injected; confirmed new was present
in the pre-iter hello.ll baseline). No user-fn IR changed.
The .2 iteration migrates the 18 prelude dummy bodies to (intrinsic),
upgrades registry_contains_all_legacy_arms to a source<->registry
bijection pin, and removes the dead body-lowering path.
8 lines
219 B
Plaintext
8 lines
219 B
Plaintext
(module kernel_intrinsic_smoke
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(kernel)
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(fn smoke
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(doc "Schema-coverage fixture: exercises Term::Intrinsic in a kernel-tier module.")
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(type (fn-type (params) (ret (con Int))))
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(params)
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(intrinsic)))
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