diff options
author | Son Ho | 2024-04-04 16:20:20 +0200 |
---|---|---|
committer | Son Ho | 2024-04-04 16:20:20 +0200 |
commit | b455f94c841b2423898f39bc9b6a4c35a3db56e3 (patch) | |
tree | 2311e681c45d9c7a27d7f728435837b3b6b41971 /tests/coq/betree | |
parent | 57b71cb1bfde1832097163c7169aaf97cf8c7583 (diff) |
Regenerate the test files
Diffstat (limited to 'tests/coq/betree')
-rw-r--r-- | tests/coq/betree/BetreeMain_Funs.v | 124 | ||||
-rw-r--r-- | tests/coq/betree/Primitives.v | 46 |
2 files changed, 84 insertions, 86 deletions
diff --git a/tests/coq/betree/BetreeMain_Funs.v b/tests/coq/betree/BetreeMain_Funs.v index 9256b149..80518eab 100644 --- a/tests/coq/betree/BetreeMain_Funs.v +++ b/tests/coq/betree/BetreeMain_Funs.v @@ -49,13 +49,13 @@ Definition betree_store_leaf_node (** [betree_main::betree::fresh_node_id]: Source: 'src/betree.rs', lines 55:0-55:48 *) Definition betree_fresh_node_id (counter : u64) : result (u64 * u64) := - counter1 <- u64_add counter 1%u64; Return (counter, counter1) + counter1 <- u64_add counter 1%u64; Ok (counter, counter1) . (** [betree_main::betree::{betree_main::betree::NodeIdCounter}::new]: Source: 'src/betree.rs', lines 206:4-206:20 *) Definition betree_NodeIdCounter_new : result betree_NodeIdCounter_t := - Return {| betree_NodeIdCounter_next_node_id := 0%u64 |} + Ok {| betree_NodeIdCounter_next_node_id := 0%u64 |} . (** [betree_main::betree::{betree_main::betree::NodeIdCounter}::fresh_id]: @@ -63,7 +63,7 @@ Definition betree_NodeIdCounter_new : result betree_NodeIdCounter_t := Definition betree_NodeIdCounter_fresh_id (self : betree_NodeIdCounter_t) : result (u64 * betree_NodeIdCounter_t) := i <- u64_add self.(betree_NodeIdCounter_next_node_id) 1%u64; - Return (self.(betree_NodeIdCounter_next_node_id), + Ok (self.(betree_NodeIdCounter_next_node_id), {| betree_NodeIdCounter_next_node_id := i |}) . @@ -74,16 +74,16 @@ Definition betree_upsert_update match prev with | None => match st with - | Betree_UpsertFunState_Add v => Return v - | Betree_UpsertFunState_Sub _ => Return 0%u64 + | Betree_UpsertFunState_Add v => Ok v + | Betree_UpsertFunState_Sub _ => Ok 0%u64 end | Some prev1 => match st with | Betree_UpsertFunState_Add v => margin <- u64_sub core_u64_max prev1; - if margin s>= v then u64_add prev1 v else Return core_u64_max + if margin s>= v then u64_add prev1 v else Ok core_u64_max | Betree_UpsertFunState_Sub v => - if prev1 s>= v then u64_sub prev1 v else Return 0%u64 + if prev1 s>= v then u64_sub prev1 v else Ok 0%u64 end end . @@ -97,7 +97,7 @@ Fixpoint betree_List_len | S n1 => match self with | Betree_List_Cons _ tl => i <- betree_List_len T n1 tl; u64_add 1%u64 i - | Betree_List_Nil => Return 0%u64 + | Betree_List_Nil => Ok 0%u64 end end . @@ -112,14 +112,14 @@ Fixpoint betree_List_split_at | O => Fail_ OutOfFuel | S n2 => if n1 s= 0%u64 - then Return (Betree_List_Nil, self) + then Ok (Betree_List_Nil, self) else match self with | Betree_List_Cons hd tl => i <- u64_sub n1 1%u64; p <- betree_List_split_at T n2 tl i; let (ls0, ls1) := p in - Return (Betree_List_Cons hd ls0, ls1) + Ok (Betree_List_Cons hd ls0, ls1) | Betree_List_Nil => Fail_ Failure end end @@ -130,7 +130,7 @@ Fixpoint betree_List_split_at Definition betree_List_push_front (T : Type) (self : betree_List_t T) (x : T) : result (betree_List_t T) := let (tl, _) := core_mem_replace (betree_List_t T) self Betree_List_Nil in - Return (Betree_List_Cons x tl) + Ok (Betree_List_Cons x tl) . (** [betree_main::betree::{betree_main::betree::List<T>#1}::pop_front]: @@ -139,7 +139,7 @@ Definition betree_List_pop_front (T : Type) (self : betree_List_t T) : result (T * (betree_List_t T)) := let (ls, _) := core_mem_replace (betree_List_t T) self Betree_List_Nil in match ls with - | Betree_List_Cons x tl => Return (x, tl) + | Betree_List_Cons x tl => Ok (x, tl) | Betree_List_Nil => Fail_ Failure end . @@ -148,7 +148,7 @@ Definition betree_List_pop_front Source: 'src/betree.rs', lines 318:4-318:22 *) Definition betree_List_hd (T : Type) (self : betree_List_t T) : result T := match self with - | Betree_List_Cons hd _ => Return hd + | Betree_List_Cons hd _ => Ok hd | Betree_List_Nil => Fail_ Failure end . @@ -158,8 +158,8 @@ Definition betree_List_hd (T : Type) (self : betree_List_t T) : result T := Definition betree_ListPairU64T_head_has_key (T : Type) (self : betree_List_t (u64 * T)) (key : u64) : result bool := match self with - | Betree_List_Cons hd _ => let (i, _) := hd in Return (i s= key) - | Betree_List_Nil => Return false + | Betree_List_Cons hd _ => let (i, _) := hd in Ok (i s= key) + | Betree_List_Nil => Ok false end . @@ -176,12 +176,12 @@ Fixpoint betree_ListPairU64T_partition_at_pivot | Betree_List_Cons hd tl => let (i, t) := hd in if i s>= pivot - then Return (Betree_List_Nil, Betree_List_Cons (i, t) tl) + then Ok (Betree_List_Nil, Betree_List_Cons (i, t) tl) else ( p <- betree_ListPairU64T_partition_at_pivot T n1 tl pivot; let (ls0, ls1) := p in - Return (Betree_List_Cons (i, t) ls0, ls1)) - | Betree_List_Nil => Return (Betree_List_Nil, Betree_List_Nil) + Ok (Betree_List_Cons (i, t) ls0, ls1)) + | Betree_List_Nil => Ok (Betree_List_Nil, Betree_List_Nil) end end . @@ -218,7 +218,7 @@ Definition betree_Leaf_split betree_Leaf_id := id1; betree_Leaf_size := params.(betree_Params_split_size) |} in - Return (st2, (mkbetree_Internal_t self.(betree_Leaf_id) pivot n1 n2, + Ok (st2, (mkbetree_Internal_t self.(betree_Leaf_id) pivot n1 n2, node_id_cnt2)) . @@ -236,16 +236,16 @@ Fixpoint betree_Node_lookup_first_message_for_key | Betree_List_Cons x next_msgs => let (i, m) := x in if i s>= key - then Return (Betree_List_Cons (i, m) next_msgs, Return) + then Ok (Betree_List_Cons (i, m) next_msgs, Ok) else ( p <- betree_Node_lookup_first_message_for_key n1 key next_msgs; let (l, lookup_first_message_for_key_back) := p in let back := fun (ret : betree_List_t (u64 * betree_Message_t)) => next_msgs1 <- lookup_first_message_for_key_back ret; - Return (Betree_List_Cons (i, m) next_msgs1) in - Return (l, back)) - | Betree_List_Nil => Return (Betree_List_Nil, Return) + Ok (Betree_List_Cons (i, m) next_msgs1) in + Ok (l, back)) + | Betree_List_Nil => Ok (Betree_List_Nil, Ok) end end . @@ -263,12 +263,10 @@ Fixpoint betree_Node_lookup_in_bindings | Betree_List_Cons hd tl => let (i, i1) := hd in if i s= key - then Return (Some i1) + then Ok (Some i1) else - if i s> key - then Return None - else betree_Node_lookup_in_bindings n1 key tl - | Betree_List_Nil => Return None + if i s> key then Ok None else betree_Node_lookup_in_bindings n1 key tl + | Betree_List_Nil => Ok None end end . @@ -302,7 +300,7 @@ Fixpoint betree_Node_apply_upserts msgs1 <- betree_List_push_front (u64 * betree_Message_t) msgs (key, Betree_Message_Insert v); - Return (st1, (v, msgs1))) + Ok (st1, (v, msgs1))) end . @@ -320,13 +318,13 @@ Fixpoint betree_Internal_lookup_in_children p <- betree_Node_lookup n1 self.(betree_Internal_left) key st; let (st1, p1) := p in let (o, n2) := p1 in - Return (st1, (o, mkbetree_Internal_t self.(betree_Internal_id) + Ok (st1, (o, mkbetree_Internal_t self.(betree_Internal_id) self.(betree_Internal_pivot) n2 self.(betree_Internal_right)))) else ( p <- betree_Node_lookup n1 self.(betree_Internal_right) key st; let (st1, p1) := p in let (o, n2) := p1 in - Return (st1, (o, mkbetree_Internal_t self.(betree_Internal_id) + Ok (st1, (o, mkbetree_Internal_t self.(betree_Internal_id) self.(betree_Internal_pivot) self.(betree_Internal_left) n2))) end @@ -354,19 +352,19 @@ with betree_Node_lookup let (st2, p4) := p3 in let (o, node1) := p4 in _ <- lookup_first_message_for_key_back (Betree_List_Cons (k, msg) l); - Return (st2, (o, Betree_Node_Internal node1))) + Ok (st2, (o, Betree_Node_Internal node1))) else match msg with | Betree_Message_Insert v => _ <- lookup_first_message_for_key_back (Betree_List_Cons (k, Betree_Message_Insert v) l); - Return (st1, (Some v, Betree_Node_Internal node)) + Ok (st1, (Some v, Betree_Node_Internal node)) | Betree_Message_Delete => _ <- lookup_first_message_for_key_back (Betree_List_Cons (k, Betree_Message_Delete) l); - Return (st1, (None, Betree_Node_Internal node)) + Ok (st1, (None, Betree_Node_Internal node)) | Betree_Message_Upsert ufs => p3 <- betree_Internal_lookup_in_children n1 node key st1; let (st2, p4) := p3 in @@ -380,20 +378,20 @@ with betree_Node_lookup p7 <- betree_store_internal_node node1.(betree_Internal_id) msgs1 st3; let (st4, _) := p7 in - Return (st4, (Some v1, Betree_Node_Internal node1)) + Ok (st4, (Some v1, Betree_Node_Internal node1)) end | Betree_List_Nil => p2 <- betree_Internal_lookup_in_children n1 node key st1; let (st2, p3) := p2 in let (o, node1) := p3 in _ <- lookup_first_message_for_key_back Betree_List_Nil; - Return (st2, (o, Betree_Node_Internal node1)) + Ok (st2, (o, Betree_Node_Internal node1)) end | Betree_Node_Leaf node => p <- betree_load_leaf_node node.(betree_Leaf_id) st; let (st1, bindings) := p in o <- betree_Node_lookup_in_bindings n1 key bindings; - Return (st1, (o, Betree_Node_Leaf node)) + Ok (st1, (o, Betree_Node_Leaf node)) end end . @@ -417,8 +415,8 @@ Fixpoint betree_Node_filter_messages_for_key m) l); let (_, msgs1) := p1 in betree_Node_filter_messages_for_key n1 key msgs1) - else Return (Betree_List_Cons (k, m) l) - | Betree_List_Nil => Return Betree_List_Nil + else Ok (Betree_List_Cons (k, m) l) + | Betree_List_Nil => Ok Betree_List_Nil end end . @@ -443,10 +441,10 @@ Fixpoint betree_Node_lookup_first_message_after_key let back := fun (ret : betree_List_t (u64 * betree_Message_t)) => next_msgs1 <- lookup_first_message_after_key_back ret; - Return (Betree_List_Cons (k, m) next_msgs1) in - Return (l, back)) - else Return (Betree_List_Cons (k, m) next_msgs, Return) - | Betree_List_Nil => Return (Betree_List_Nil, Return) + Ok (Betree_List_Cons (k, m) next_msgs1) in + Ok (l, back)) + else Ok (Betree_List_Cons (k, m) next_msgs, Ok) + | Betree_List_Nil => Ok (Betree_List_Nil, Ok) end end . @@ -527,7 +525,7 @@ Fixpoint betree_Node_apply_messages_to_internal let (i, m) := new_msg in msgs1 <- betree_Node_apply_to_internal n1 msgs i m; betree_Node_apply_messages_to_internal n1 msgs1 new_msgs_tl - | Betree_List_Nil => Return msgs + | Betree_List_Nil => Ok msgs end end . @@ -546,16 +544,16 @@ Fixpoint betree_Node_lookup_mut_in_bindings | Betree_List_Cons hd tl => let (i, i1) := hd in if i s>= key - then Return (Betree_List_Cons (i, i1) tl, Return) + then Ok (Betree_List_Cons (i, i1) tl, Ok) else ( p <- betree_Node_lookup_mut_in_bindings n1 key tl; let (l, lookup_mut_in_bindings_back) := p in let back := fun (ret : betree_List_t (u64 * u64)) => tl1 <- lookup_mut_in_bindings_back ret; - Return (Betree_List_Cons (i, i1) tl1) in - Return (l, back)) - | Betree_List_Nil => Return (Betree_List_Nil, Return) + Ok (Betree_List_Cons (i, i1) tl1) in + Ok (l, back)) + | Betree_List_Nil => Ok (Betree_List_Nil, Ok) end end . @@ -613,7 +611,7 @@ Fixpoint betree_Node_apply_messages_to_leaf let (i, m) := new_msg in bindings1 <- betree_Node_apply_to_leaf n1 bindings i m; betree_Node_apply_messages_to_leaf n1 bindings1 new_msgs_tl - | Betree_List_Nil => Return bindings + | Betree_List_Nil => Ok bindings end end . @@ -650,20 +648,20 @@ Fixpoint betree_Internal_flush node_id_cnt1 msgs_right st1; let (st2, p4) := p3 in let (n3, node_id_cnt2) := p4 in - Return (st2, (Betree_List_Nil, (mkbetree_Internal_t + Ok (st2, (Betree_List_Nil, (mkbetree_Internal_t self.(betree_Internal_id) self.(betree_Internal_pivot) n2 n3, node_id_cnt2)))) else - Return (st1, (msgs_right, (mkbetree_Internal_t - self.(betree_Internal_id) self.(betree_Internal_pivot) n2 - self.(betree_Internal_right), node_id_cnt1)))) + Ok (st1, (msgs_right, (mkbetree_Internal_t self.(betree_Internal_id) + self.(betree_Internal_pivot) n2 self.(betree_Internal_right), + node_id_cnt1)))) else ( p1 <- betree_Node_apply_messages n1 self.(betree_Internal_right) params node_id_cnt msgs_right st; let (st1, p2) := p1 in let (n2, node_id_cnt1) := p2 in - Return (st1, (msgs_left, (mkbetree_Internal_t self.(betree_Internal_id) + Ok (st1, (msgs_left, (mkbetree_Internal_t self.(betree_Internal_id) self.(betree_Internal_pivot) self.(betree_Internal_left) n2, node_id_cnt1)))) end @@ -694,12 +692,12 @@ with betree_Node_apply_messages p4 <- betree_store_internal_node node1.(betree_Internal_id) content2 st2; let (st3, _) := p4 in - Return (st3, (Betree_Node_Internal node1, node_id_cnt1))) + Ok (st3, (Betree_Node_Internal node1, node_id_cnt1))) else ( p1 <- betree_store_internal_node node.(betree_Internal_id) content1 st1; let (st2, _) := p1 in - Return (st2, (Betree_Node_Internal node, node_id_cnt))) + Ok (st2, (Betree_Node_Internal node, node_id_cnt))) | Betree_Node_Leaf node => p <- betree_load_leaf_node node.(betree_Leaf_id) st; let (st1, content) := p in @@ -713,11 +711,11 @@ with betree_Node_apply_messages let (new_node, node_id_cnt1) := p2 in p3 <- betree_store_leaf_node node.(betree_Leaf_id) Betree_List_Nil st2; let (st3, _) := p3 in - Return (st3, (Betree_Node_Internal new_node, node_id_cnt1))) + Ok (st3, (Betree_Node_Internal new_node, node_id_cnt1))) else ( p1 <- betree_store_leaf_node node.(betree_Leaf_id) content1 st1; let (st2, _) := p1 in - Return (st2, (Betree_Node_Leaf + Ok (st2, (Betree_Node_Leaf {| betree_Leaf_id := node.(betree_Leaf_id); betree_Leaf_size := len |}, node_id_cnt))) end @@ -737,7 +735,7 @@ Definition betree_Node_apply (key, new_msg) Betree_List_Nil) st; let (st1, p1) := p in let (self1, node_id_cnt1) := p1 in - Return (st1, (self1, node_id_cnt1)) + Ok (st1, (self1, node_id_cnt1)) . (** [betree_main::betree::{betree_main::betree::BeTree#6}::new]: @@ -751,7 +749,7 @@ Definition betree_BeTree_new let (id, node_id_cnt1) := p in p1 <- betree_store_leaf_node id Betree_List_Nil st; let (st1, _) := p1 in - Return (st1, + Ok (st1, {| betree_BeTree_params := {| @@ -777,7 +775,7 @@ Definition betree_BeTree_apply self.(betree_BeTree_node_id_cnt) key msg st; let (st1, p1) := p in let (n1, nic) := p1 in - Return (st1, + Ok (st1, {| betree_BeTree_params := self.(betree_BeTree_params); betree_BeTree_node_id_cnt := nic; @@ -822,7 +820,7 @@ Definition betree_BeTree_lookup p <- betree_Node_lookup n self.(betree_BeTree_root) key st; let (st1, p1) := p in let (o, n1) := p1 in - Return (st1, (o, + Ok (st1, (o, {| betree_BeTree_params := self.(betree_BeTree_params); betree_BeTree_node_id_cnt := self.(betree_BeTree_node_id_cnt); @@ -833,7 +831,7 @@ Definition betree_BeTree_lookup (** [betree_main::main]: Source: 'src/betree_main.rs', lines 5:0-5:9 *) Definition main : result unit := - Return tt. + Ok tt. (** Unit test for [betree_main::main] *) Check (main )%return. diff --git a/tests/coq/betree/Primitives.v b/tests/coq/betree/Primitives.v index 990e27e4..e84d65ce 100644 --- a/tests/coq/betree/Primitives.v +++ b/tests/coq/betree/Primitives.v @@ -19,19 +19,19 @@ Inductive error := | OutOfFuel. Inductive result A := - | Return : A -> result A + | Ok : A -> result A | Fail_ : error -> result A. -Arguments Return {_} a. +Arguments Ok {_} a. Arguments Fail_ {_}. Definition bind {A B} (m: result A) (f: A -> result B) : result B := match m with | Fail_ e => Fail_ e - | Return x => f x + | Ok x => f x end. -Definition return_ {A: Type} (x: A) : result A := Return x. +Definition return_ {A: Type} (x: A) : result A := Ok x. Definition fail_ {A: Type} (e: error) : result A := Fail_ e. Notation "x <- c1 ; c2" := (bind c1 (fun x => c2)) @@ -39,27 +39,27 @@ Notation "x <- c1 ; c2" := (bind c1 (fun x => c2)) (** Monadic assert *) Definition massert (b: bool) : result unit := - if b then Return tt else Fail_ Failure. + if b then Ok tt else Fail_ Failure. (** Normalize and unwrap a successful result (used for globals) *) -Definition eval_result_refl {A} {x} (a: result A) (p: a = Return x) : A := - match a as r return (r = Return x -> A) with - | Return a' => fun _ => a' +Definition eval_result_refl {A} {x} (a: result A) (p: a = Ok x) : A := + match a as r return (r = Ok x -> A) with + | Ok a' => fun _ => a' | Fail_ e => fun p' => False_rect _ (eq_ind (Fail_ e) (fun e : result A => match e with - | Return _ => False + | Ok _ => False | Fail_ e => True end) - I (Return x) p') + I (Ok x) p') end p. Notation "x %global" := (eval_result_refl x eq_refl) (at level 40). Notation "x %return" := (eval_result_refl x eq_refl) (at level 40). (* Sanity check *) -Check (if true then Return (1 + 2) else Fail_ Failure)%global = 3. +Check (if true then Ok (1 + 2) else Fail_ Failure)%global = 3. (*** Misc *) @@ -236,7 +236,7 @@ Import Sumbool. Definition mk_scalar (ty: scalar_ty) (x: Z) : result (scalar ty) := match sumbool_of_bool (scalar_in_bounds ty x) with - | left H => Return (exist _ x (scalar_in_bounds_valid _ _ H)) + | left H => Ok (exist _ x (scalar_in_bounds_valid _ _ H)) | right _ => Fail_ Failure end. @@ -544,9 +544,9 @@ Arguments core_ops_range_Range_end_ {_}. (*** [alloc] *) -Definition alloc_boxed_Box_deref (T : Type) (x : T) : result T := Return x. +Definition alloc_boxed_Box_deref (T : Type) (x : T) : result T := Ok x. Definition alloc_boxed_Box_deref_mut (T : Type) (x : T) : result (T * (T -> result T)) := - Return (x, fun x => Return x). + Ok (x, fun x => Ok x). (* Trait instance *) Definition alloc_boxed_Box_coreopsDerefInst (Self : Type) : core_ops_deref_Deref Self := {| @@ -589,7 +589,7 @@ Definition array_index_mut_usize (T : Type) (n : usize) (a : array T n) (i : usi result (T * (T -> result (array T n))) := match array_index_usize T n a i with | Fail_ e => Fail_ e - | Return x => Return (x, array_update_usize T n a i) + | Ok x => Ok (x, array_update_usize T n a i) end. (*** Slice *) @@ -603,7 +603,7 @@ Definition slice_index_mut_usize (T : Type) (s : slice T) (i : usize) : result (T * (T -> result (slice T))) := match slice_index_usize T s i with | Fail_ e => Fail_ e - | Return x => Return (x, slice_update_usize T s i) + | Ok x => Ok (x, slice_update_usize T s i) end. (*** Subslices *) @@ -615,7 +615,7 @@ Definition array_to_slice_mut (T : Type) (n : usize) (a : array T n) : result (slice T * (slice T -> result (array T n))) := match array_to_slice T n a with | Fail_ e => Fail_ e - | Return x => Return (x, array_from_slice T n a) + | Ok x => Ok (x, array_from_slice T n a) end. Axiom array_subslice: forall (T : Type) (n : usize) (x : array T n) (r : core_ops_range_Range usize), result (slice T). @@ -657,17 +657,17 @@ end end. Definition alloc_vec_Vec_bind {A B} (v: alloc_vec_Vec A) (f: list A -> result (list B)) : result (alloc_vec_Vec B) := l <- f (alloc_vec_Vec_to_list v) ; match sumbool_of_bool (scalar_le_max Usize (Z.of_nat (length l))) with - | left H => Return (exist _ l (scalar_le_max_valid _ _ H)) + | left H => Ok (exist _ l (scalar_le_max_valid _ _ H)) | right _ => Fail_ Failure end. Definition alloc_vec_Vec_push (T: Type) (v: alloc_vec_Vec T) (x: T) : result (alloc_vec_Vec T) := - alloc_vec_Vec_bind v (fun l => Return (l ++ [x])). + alloc_vec_Vec_bind v (fun l => Ok (l ++ [x])). Definition alloc_vec_Vec_insert (T: Type) (v: alloc_vec_Vec T) (i: usize) (x: T) : result (alloc_vec_Vec T) := alloc_vec_Vec_bind v (fun l => if to_Z i <? Z.of_nat (length l) - then Return (list_update l (usize_to_nat i) x) + then Ok (list_update l (usize_to_nat i) x) else Fail_ Failure). (* Helper *) @@ -679,8 +679,8 @@ Axiom alloc_vec_Vec_update_usize : forall {T : Type} (v : alloc_vec_Vec T) (i : Definition alloc_vec_Vec_index_mut_usize {T : Type} (v: alloc_vec_Vec T) (i: usize) : result (T * (T -> result (alloc_vec_Vec T))) := match alloc_vec_Vec_index_usize v i with - | Return x => - Return (x, alloc_vec_Vec_update_usize v i) + | Ok x => + Ok (x, alloc_vec_Vec_update_usize v i) | Fail_ e => Fail_ e end. @@ -717,7 +717,7 @@ Definition core_slice_index_Slice_index x <- inst.(core_slice_index_SliceIndex_get) i s; match x with | None => Fail_ Failure - | Some x => Return x + | Some x => Ok x end. (* [core::slice::index::Range:::get]: forward function *) |