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PR-A0: manual witness API repin (post-#6520 structural termination) #6529

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Merged
briansrls merged 2 commits into from
Jul 13, 2026
Merged

PR-A0: manual witness API repin (post-#6520 structural termination) #6529

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87e9185
WIP: Wave 1 criterion 1 — general body producer PR-A→E (resume; zesty…
Jul 13, 2026
ff287cd
fix(body-lowering): align manual witnesses with post-#6520 structural…
Jul 13, 2026
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86 changes: 35 additions & 51 deletions src/v2/test/claim/manual/body_lowering_match.dag
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,6 @@ import v2.std.node {
Match,
Node,
TypeNode,
node_subtree_count,
node_synthetic
}
import v2.std.verification {
Expand Down Expand Up @@ -113,25 +112,21 @@ fn body_lowering_match_lowers_to_match() -> Bool {
match body_lowering_find_match_expr(root: tree) {
Absent => false
Present { value: shell } =>
match body_lower_unwrap_captured(remaining: node_subtree_count(n: shell), shell: shell) {
Rejected { diagnostics: _ } => false
Accepted { value: captured_opt, diagnostics: _ } =>
match captured_opt {
Present { value: captured } =>
match body_lower_try_match_from_captured(remaining: node_subtree_count(n: captured), captured: captured) {
Rejected { diagnostics: _ } => false
Accepted { value: lowered_opt, diagnostics: _ } =>
match lowered_opt {
Present { value: lowered } =>
match lowered.kind {
ComputationNode { behavior: Match } => true
_ => false
}
Absent => false
match body_lower_unwrap_captured(shell: shell) {
Present { value: captured } =>
match body_lower_try_match_from_captured(captured: captured) {
Rejected { diagnostics: _ } => false
Accepted { value: lowered_opt, diagnostics: _ } =>
match lowered_opt {
Present { value: lowered } =>
match lowered.kind {
ComputationNode { behavior: Match } => true
_ => false
}
Absent => false
}
Absent => false
}
Absent => false
}
}
}
Expand Down Expand Up @@ -178,21 +173,17 @@ fn body_lowering_match_arms_found() -> Bool {
match body_lowering_find_match_expr(root: tree) {
Absent => false
Present { value: shell } =>
match body_lower_unwrap_captured(remaining: node_subtree_count(n: shell), shell: shell) {
Rejected { diagnostics: _ } => false
Accepted { value: captured_opt, diagnostics: _ } =>
match captured_opt {
Present { value: captured } =>
match body_lower_match_arms_optional(remaining: node_subtree_count(n: captured), captured: captured) {
Rejected { diagnostics: _ } => false
Accepted { value: arms_opt, diagnostics: _ } =>
match arms_opt {
Present { value: arms } => length(xs: arms) > 0
Absent => false
}
match body_lower_unwrap_captured(shell: shell) {
Present { value: captured } =>
match body_lower_match_arms_optional(captured: captured) {
Rejected { diagnostics: _ } => false
Accepted { value: arms_opt, diagnostics: _ } =>
match arms_opt {
Present { value: arms } => length(xs: arms) > 0
Absent => false
}
Absent => false
}
Absent => false
}
}
}
Expand All @@ -205,40 +196,33 @@ fn body_lowering_match_first_arm_wires() -> Bool {
match body_lowering_find_match_expr(root: tree) {
Absent => false
Present { value: shell } =>
match body_lower_unwrap_captured(remaining: node_subtree_count(n: shell), shell: shell) {
Rejected { diagnostics: _ } => false
Accepted { value: captured_opt, diagnostics: _ } =>
match captured_opt {
Present { value: captured } =>
match parse_subtree_find_production_captured(
root: captured,
emitted: ^dag_surface_match_arm
) {
ParseSubtreeFound { captured: arm } =>
match body_lower_wire_match_arm_capture(remaining: node_subtree_count(n: arm), arm_capture: arm) {
Accepted { value: _, diagnostics: _ } => true
Rejected { diagnostics: _ } => false
}
ParseSubtreeAbsent => false
match body_lower_unwrap_captured(shell: shell) {
Present { value: captured } =>
match parse_subtree_find_production_captured(
root: captured,
emitted: ^dag_surface_match_arm
) {
ParseSubtreeFound { captured: arm } =>
match body_lower_wire_match_arm_capture(arm_capture: arm) {
Accepted { value: _, diagnostics: _ } => true
Rejected { diagnostics: _ } => false
}
Absent => false
ParseSubtreeAbsent => false
}
Absent => false
}
}
}
}

data unnavigable_arm_budget_note: String = "The step budget carries slack past the synthetic arm's own subtree count (1) so the walk reaches arm navigation and refuses with the pinned ^body_lowering_reason_match_arm_navigation_refused — an exact-count budget exhausts first and the witness would assert the wrong refusal (^body_lowering_reason_descent_not_proven)."
data unnavigable_arm_budget_note: String = "Synthetic empty Conj arm capture has no navigable match_arm production spine — body_lower_wire_match_arm_capture must refuse with ^body_lowering_reason_match_arm_navigation_refused (structural termination; no fuel budget)."

fn body_lowering_match_unnavigable_arm_refuses() -> Bool {
let unnavigable_arm = node_synthetic(
kind: TypeNode { connective: Conj },
children: Empty
)
match body_lower_wire_match_arm_capture(
remaining: node_subtree_count(n: unnavigable_arm) + 8,
arm_capture: unnavigable_arm
) {
match body_lower_wire_match_arm_capture(arm_capture: unnavigable_arm) {
Rejected { diagnostics: d } =>
d.head.reason == ^body_lowering_reason_match_arm_navigation_refused
Accepted { value: _, diagnostics: _ } => false
Expand Down
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