Copilot 316d249b3f SMT2 front-end: accept HO_ALL and normalize curried expression-head applications (#9636) ... The SMT2 front-end rejected valid higher-order inputs using `HO_ALL` and failed on curried applications where the function position is itself an expression (e.g., `((transfer top) 0)`). This update adds `HO_ALL` support and makes curried parsing consistently lower to implicit `select` chains. - **Logic recognition** - Treat `HO_ALL` as an `ALL`-class logic in SMT logic classification. - This unblocks `(set-logic HO_ALL)` in the standard SMT2 command path. - **Curried application parsing** - Extend application-frame handling to support parenthesized expression heads, not only symbol heads. - When the head is an expression, parse application arguments normally and construct nested implicit selects: - `(f a b)` → `(select (select f a) b)` - Preserve existing behavior for symbol-based applications, qualified identifiers, and lambda-led forms. - **Regression coverage** - Add a focused parser/eval regression using the reported higher-order case to lock in behavior. ```smt2 (set-logic HO_ALL) (declare-fun transfer () (-> (-> Int Bool) (-> Int Bool))) (assert (forall ((P (-> Int Bool))) (=> (P 0) ((transfer P) 0)))) (declare-fun top () (-> Int Bool)) (assert (forall ((x Int)) (top x))) (assert (not ((transfer top) 0))) (check-sat) ``` --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>		2026-05-26 18:39:38 -07:00
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smt2	SMT2 front-end: accept HO_ALL and normalize curried expression-head applications (#9636)	2026-05-26 18:39:38 -07:00
util	Centralize and document TRACE tags using X-macros (#7657)	2025-05-28 14:31:25 +01:00