diff options
| author | Guillaume Melquiond | 2020-08-31 13:53:49 +0200 |
|---|---|---|
| committer | Guillaume Melquiond | 2020-11-13 15:13:23 +0100 |
| commit | 0d6f8e4b12e09e8a5a7e562a80d962dca69da7af (patch) | |
| tree | 20c16be8b536ef4bc34b551f508a4cb6efebf082 /kernel/vmvalues.ml | |
| parent | 4e2bd77d2c6a6d0791c2b30a1b7cb3524a148800 (diff) | |
Improve documentation of closure representations.
Diffstat (limited to 'kernel/vmvalues.ml')
| -rw-r--r-- | kernel/vmvalues.ml | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/kernel/vmvalues.ml b/kernel/vmvalues.ml index 7b4101b9d0..9944458d6b 100644 --- a/kernel/vmvalues.ml +++ b/kernel/vmvalues.ml @@ -381,7 +381,15 @@ let rec whd_accu a stk = CErrors.anomaly Pp.(strbrk "Failed to parse VM value. Tag = " ++ int tg ++ str ".") -external kind_of_closure : Obj.t -> int = "coq_kind_of_closure" +[@@@warning "-37"] +type vm_closure_kind = + | VCfun (** closure, or fixpoint applied past the recursive argument *) + | VCfix (** unapplied fixpoint *) + | VCfix_partial (** partially applied fixpoint, but not sufficiently for recursion *) + | VCaccu (** accumulator *) +[@@@warning "+37"] + +external kind_of_closure : Obj.t -> vm_closure_kind = "coq_kind_of_closure" external is_accumulate : tcode -> bool = "coq_is_accumulate_code" external int_tcode : tcode -> int -> int = "coq_int_tcode" external accumulate : unit -> tcode = "accumulate_code" @@ -400,12 +408,11 @@ let whd_val (v: values) = else if Int.equal tag Obj.closure_tag && is_accumulate (fun_code o) then whd_accu o [] else if Int.equal tag Obj.closure_tag || Int.equal tag Obj.infix_tag then - (match kind_of_closure o with - | 0 -> Vfun(Obj.obj o) - | 1 -> Vfix(Obj.obj o, None) - | 2 -> Vfix(Obj.obj (Obj.field o 2), Some (Obj.obj o)) - | 3 -> Vatom_stk(Aid(RelKey(int_tcode (fun_code o) 1)), []) - | _ -> CErrors.anomaly ~label:"Vm.whd " (Pp.str "kind_of_closure does not work.")) + match kind_of_closure o with + | VCfun -> Vfun (Obj.obj o) + | VCfix -> Vfix (Obj.obj o, None) + | VCfix_partial -> Vfix (Obj.obj (Obj.field o 2), Some (Obj.obj o)) + | VCaccu -> Vatom_stk (Aid (RelKey (int_tcode (fun_code o) 1)), []) else if Int.equal tag Obj.custom_tag then Vint64 (Obj.magic v) else if Int.equal tag Obj.double_tag then Vfloat64 (Obj.magic v) else |