Fix #10615: Notation substitution for Ltac2 terms.

We implement a new type of "preterms" that represent untyped ASTs, corresponding
to glob_expr in the ML implementations. Ltac2 quotations inside notations are
provided with such preterms, and have to pretype them in order to do anything
of relevance with them.

1 files changed, 33 insertions, 0 deletions

diff --git a/test-suite/ltac2/term_notations.v b/test-suite/ltac2/term_notations.v
new file mode 100644
index 0000000000..85eb858d4e
--- /dev/null
+++ b/test-suite/ltac2/term_notations.v
@@ -0,0 +1,33 @@
+Require Import Ltac2.Ltac2.
+
+(* Preterms are not terms *)
+Fail Notation "[ x ]" := $x.
+
+Section Foo.
+
+Notation "[ x ]" := ltac2:(Control.refine (fun _ => Constr.pretype x)).
+
+Goal [ True ].
+Proof.
+constructor.
+Qed.
+
+End Foo.
+
+Section Bar.
+
+(* Have fun with context capture *)
+Notation "[ x ]" := ltac2:(
+  let c () := Constr.pretype x in
+  refine constr:(forall n : nat, n = ltac2:(Notations.exact0 true c))
+).
+
+Goal forall n : nat, [ n ].
+Proof.
+reflexivity.
+Qed.
+
+(* This fails currently, which is arguably a bug *)
+Fail Goal [ n ].
+
+End Bar.