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-rw-r--r--spartan/core/lib.ML3
1 files changed, 3 insertions, 0 deletions
diff --git a/spartan/core/lib.ML b/spartan/core/lib.ML
index 615f601..7b93a08 100644
--- a/spartan/core/lib.ML
+++ b/spartan/core/lib.ML
@@ -7,6 +7,7 @@ val maxint: int list -> int
(*Terms*)
val is_rigid: term -> bool
+val no_vars: term -> bool
val dest_eq: term -> term * term
val mk_Var: string -> int -> typ -> term
val lambda_var: term -> term -> term
@@ -50,6 +51,8 @@ val maxint = max (op >)
val is_rigid = not o is_Var o head_of
+val no_vars = not o exists_subterm is_Var
+
fun dest_eq (Const (\<^const_name>\<open>Pure.eq\<close>, _) $ t $ def) = (t, def)
| dest_eq _ = error "dest_eq"