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-rw-r--r--language/l2.lem1
-rw-r--r--language/l2_typ.ott1
2 files changed, 2 insertions, 0 deletions
diff --git a/language/l2.lem b/language/l2.lem
index 32b6f1c7..2fd685f4 100644
--- a/language/l2.lem
+++ b/language/l2.lem
@@ -484,6 +484,7 @@ type t = (* Internal types *)
| T_fn of t * t * effect
| T_tup of list t
| T_app of id * t_args
+ | T_abbrev of t * t
and t_arg = (* Argument to type constructors *)
| T_arg_typ of t
diff --git a/language/l2_typ.ott b/language/l2_typ.ott
index 43a3ea17..057ddfba 100644
--- a/language/l2_typ.ott
+++ b/language/l2_typ.ott
@@ -47,6 +47,7 @@ t , u :: 'T_' ::=
| t1 -> t2 effect :: :: fn
| ( t1 * .... * tn ) :: :: tup
| id t_args :: :: app
+ | t |-> t1 :: :: abbrev
| register t_args :: S :: reg_app {{ ichlo T_app "register" [[t_args]] }}
| t [ t1 / id1 ... tn / idn ] :: M :: subst {{ ichlo "todo" }}