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Detect cycles in type declarations
[tiger.ml.git]
/
compiler
/
src
/
lib
/
tiger
/
tiger_error.mli
diff --git
a/compiler/src/lib/tiger/tiger_error.mli
b/compiler/src/lib/tiger/tiger_error.mli
index
9090ad4
..
73505b8
100644
(file)
--- a/
compiler/src/lib/tiger/tiger_error.mli
+++ b/
compiler/src/lib/tiger/tiger_error.mli
@@
-4,6
+4,12
@@
module Sym = Tiger_symbol
module Typ = Tiger_env_type
type t =
module Typ = Tiger_env_type
type t =
+ | Cycle_in_type_decs of
+ { from_id : Sym.t
+ ; from_pos : Pos.t
+ ; to_id : Sym.t
+ ; to_pos : Pos.t
+ }
| Invalid_syntax of Pos.t
| Unknown_id of {id : Sym.t; pos : Pos.t}
| Unknown_type of {ty_id : Sym.t; pos : Pos.t}
| Invalid_syntax of Pos.t
| Unknown_id of {id : Sym.t; pos : Pos.t}
| Unknown_type of {ty_id : Sym.t; pos : Pos.t}
@@
-78,3
+84,4
@@
val is_invalid_syntax : t -> bool
val is_not_a_record : t -> bool
val is_not_an_array : t -> bool
val is_no_such_field_in_record : t -> bool
val is_not_a_record : t -> bool
val is_not_an_array : t -> bool
val is_no_such_field_in_record : t -> bool
+val is_cycle_in_type_dec : t -> bool
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