From 5a96e28b8706ed945ccbb569881ca1888cd73ace Mon Sep 17 00:00:00 2001 From: Son Ho Date: Mon, 14 Nov 2022 11:58:31 +0100 Subject: Regenerate the files and fix the proofs --- tests/fstar/betree/BetreeMain.Funs.fst | 421 +++++++++++++++++---------------- tests/fstar/betree/Primitives.fst | 32 +-- 2 files changed, 230 insertions(+), 223 deletions(-) (limited to 'tests/fstar/betree') diff --git a/tests/fstar/betree/BetreeMain.Funs.fst b/tests/fstar/betree/BetreeMain.Funs.fst index 8cb5eb41..f6045dfd 100644 --- a/tests/fstar/betree/BetreeMain.Funs.fst +++ b/tests/fstar/betree/BetreeMain.Funs.fst @@ -14,7 +14,7 @@ let betree_load_internal_node_fwd result (state & (betree_list_t (u64 & betree_message_t))) = begin match betree_utils_load_internal_node_fwd id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, l) -> Return (st0, l) end @@ -24,7 +24,7 @@ let betree_store_internal_node_fwd result (state & unit) = begin match betree_utils_store_internal_node_fwd id content st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> Return (st0, ()) end @@ -32,7 +32,7 @@ let betree_store_internal_node_fwd let betree_load_leaf_node_fwd (id : u64) (st : state) : result (state & (betree_list_t (u64 & u64))) = begin match betree_utils_load_leaf_node_fwd id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, l) -> Return (st0, l) end @@ -42,21 +42,21 @@ let betree_store_leaf_node_fwd result (state & unit) = begin match betree_utils_store_leaf_node_fwd id content st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> Return (st0, ()) end (** [betree_main::betree::fresh_node_id] *) let betree_fresh_node_id_fwd (counter : u64) : result u64 = begin match u64_add counter 1 with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return counter end (** [betree_main::betree::fresh_node_id] *) let betree_fresh_node_id_back (counter : u64) : result u64 = begin match u64_add counter 1 with - | Fail -> Fail + | Fail e -> Fail e | Return counter0 -> Return counter0 end @@ -68,7 +68,7 @@ let betree_node_id_counter_new_fwd : result betree_node_id_counter_t = let betree_node_id_counter_fresh_id_fwd (self : betree_node_id_counter_t) : result u64 = begin match u64_add self.betree_node_id_counter_next_node_id 1 with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return self.betree_node_id_counter_next_node_id end @@ -76,7 +76,7 @@ let betree_node_id_counter_fresh_id_fwd let betree_node_id_counter_fresh_id_back (self : betree_node_id_counter_t) : result betree_node_id_counter_t = begin match u64_add self.betree_node_id_counter_next_node_id 1 with - | Fail -> Fail + | Fail e -> Fail e | Return i -> Return (Mkbetree_node_id_counter_t i) end @@ -97,12 +97,12 @@ let betree_upsert_update_fwd begin match st with | BetreeUpsertFunStateAdd v -> begin match u64_sub core_num_u64_max_c prev0 with - | Fail -> Fail + | Fail e -> Fail e | Return margin -> if margin >= v then begin match u64_add prev0 v with - | Fail -> Fail + | Fail e -> Fail e | Return i -> Return i end else Return core_num_u64_max_c @@ -111,7 +111,7 @@ let betree_upsert_update_fwd if prev0 >= v then begin match u64_sub prev0 v with - | Fail -> Fail + | Fail e -> Fail e | Return i -> Return i end else Return 0 @@ -126,9 +126,12 @@ let rec betree_list_len_fwd begin match self with | BetreeListCons x tl -> begin match betree_list_len_fwd t tl with - | Fail -> Fail + | Fail e -> Fail e | Return i -> - begin match u64_add 1 i with | Fail -> Fail | Return i0 -> Return i0 end + begin match u64_add 1 i with + | Fail e -> Fail e + | Return i0 -> Return i0 + end end | BetreeListNil -> Return 0 end @@ -145,17 +148,17 @@ let rec betree_list_split_at_fwd begin match self with | BetreeListCons hd tl -> begin match u64_sub n 1 with - | Fail -> Fail + | Fail e -> Fail e | Return i -> begin match betree_list_split_at_fwd t tl i with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (ls0, ls1) = p in let l = ls0 in Return (BetreeListCons hd l, ls1) end end - | BetreeListNil -> Fail + | BetreeListNil -> Fail Failure end (** [betree_main::betree::List::{1}::push_front] *) @@ -170,7 +173,7 @@ let betree_list_pop_front_fwd (t : Type0) (self : betree_list_t t) : result t = let ls = mem_replace_fwd (betree_list_t t) self BetreeListNil in begin match ls with | BetreeListCons x tl -> Return x - | BetreeListNil -> Fail + | BetreeListNil -> Fail Failure end (** [betree_main::betree::List::{1}::pop_front] *) @@ -179,14 +182,14 @@ let betree_list_pop_front_back let ls = mem_replace_fwd (betree_list_t t) self BetreeListNil in begin match ls with | BetreeListCons x tl -> Return tl - | BetreeListNil -> Fail + | BetreeListNil -> Fail Failure end (** [betree_main::betree::List::{1}::hd] *) let betree_list_hd_fwd (t : Type0) (self : betree_list_t t) : result t = begin match self with | BetreeListCons hd l -> Return hd - | BetreeListNil -> Fail + | BetreeListNil -> Fail Failure end (** [betree_main::betree::List::{2}::head_has_key] *) @@ -210,7 +213,7 @@ let rec betree_list_partition_at_pivot_fwd then Return (BetreeListNil, BetreeListCons (i, x) tl) else begin match betree_list_partition_at_pivot_fwd t tl pivot with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (ls0, ls1) = p in let l = ls0 in @@ -229,27 +232,27 @@ let betree_leaf_split_fwd begin match betree_list_split_at_fwd (u64 & u64) content params.betree_params_split_size with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (content0, content1) = p in begin match betree_list_hd_fwd (u64 & u64) content1 with - | Fail -> Fail + | Fail e -> Fail e | Return p0 -> let (pivot, _) = p0 in begin match betree_node_id_counter_fresh_id_fwd node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return id0 -> begin match betree_node_id_counter_fresh_id_back node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt0 -> begin match betree_node_id_counter_fresh_id_fwd node_id_cnt0 with - | Fail -> Fail + | Fail e -> Fail e | Return id1 -> begin match betree_store_leaf_node_fwd id0 content0 st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_store_leaf_node_fwd id1 content1 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, _) -> let n = BetreeNodeLeaf (Mkbetree_leaf_t id0 params.betree_params_split_size) in @@ -275,30 +278,30 @@ let betree_leaf_split_back begin match betree_list_split_at_fwd (u64 & u64) content params.betree_params_split_size with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (content0, content1) = p in begin match betree_list_hd_fwd (u64 & u64) content1 with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> begin match betree_node_id_counter_fresh_id_fwd node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return id0 -> begin match betree_node_id_counter_fresh_id_back node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt0 -> begin match betree_node_id_counter_fresh_id_fwd node_id_cnt0 with - | Fail -> Fail + | Fail e -> Fail e | Return id1 -> begin match betree_store_leaf_node_fwd id0 content0 st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_store_leaf_node_fwd id1 content1 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> begin match betree_node_id_counter_fresh_id_back node_id_cnt0 with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt1 -> Return node_id_cnt1 end end @@ -325,7 +328,7 @@ let rec betree_node_lookup_in_bindings_fwd then Return None else begin match betree_node_lookup_in_bindings_fwd key tl with - | Fail -> Fail + | Fail e -> Fail e | Return opt -> Return opt end | BetreeListNil -> Return None @@ -345,7 +348,7 @@ let rec betree_node_lookup_first_message_for_key_fwd else begin match betree_node_lookup_first_message_for_key_fwd key next_msgs with - | Fail -> Fail + | Fail e -> Fail e | Return l -> Return l end | BetreeListNil -> Return BetreeListNil @@ -366,7 +369,7 @@ let rec betree_node_lookup_first_message_for_key_back else begin match betree_node_lookup_first_message_for_key_back key next_msgs ret with - | Fail -> Fail + | Fail e -> Fail e | Return next_msgs0 -> Return (BetreeListCons (i, m) next_msgs0) end | BetreeListNil -> Return ret @@ -380,28 +383,28 @@ let rec betree_node_apply_upserts_fwd (decreases (betree_node_apply_upserts_decreases msgs prev key st)) = begin match betree_list_head_has_key_fwd betree_message_t msgs key with - | Fail -> Fail + | Fail e -> Fail e | Return b -> if b then begin match betree_list_pop_front_fwd (u64 & betree_message_t) msgs with - | Fail -> Fail + | Fail e -> Fail e | Return msg -> let (_, m) = msg in begin match m with - | BetreeMessageInsert i -> Fail - | BetreeMessageDelete -> Fail + | BetreeMessageInsert i -> Fail Failure + | BetreeMessageDelete -> Fail Failure | BetreeMessageUpsert s -> begin match betree_upsert_update_fwd prev s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_pop_front_back (u64 & betree_message_t) msgs with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_node_apply_upserts_fwd msgs0 (Some v) key st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, i) -> Return (st0, i) end end @@ -410,12 +413,12 @@ let rec betree_node_apply_upserts_fwd end else begin match core_option_option_unwrap_fwd u64 prev st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, v) -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs (key, BetreeMessageInsert v) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, v) end end @@ -429,28 +432,28 @@ let rec betree_node_apply_upserts_back (decreases (betree_node_apply_upserts_decreases msgs prev key st)) = begin match betree_list_head_has_key_fwd betree_message_t msgs key with - | Fail -> Fail + | Fail e -> Fail e | Return b -> if b then begin match betree_list_pop_front_fwd (u64 & betree_message_t) msgs with - | Fail -> Fail + | Fail e -> Fail e | Return msg -> let (_, m) = msg in begin match m with - | BetreeMessageInsert i -> Fail - | BetreeMessageDelete -> Fail + | BetreeMessageInsert i -> Fail Failure + | BetreeMessageDelete -> Fail Failure | BetreeMessageUpsert s -> begin match betree_upsert_update_fwd prev s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_pop_front_back (u64 & betree_message_t) msgs with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_node_apply_upserts_back msgs0 (Some v) key st with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> Return msgs1 end end @@ -459,12 +462,12 @@ let rec betree_node_apply_upserts_back end else begin match core_option_option_unwrap_fwd u64 prev st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, v) -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs (key, BetreeMessageInsert v) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> Return msgs0 end end @@ -479,10 +482,10 @@ let rec betree_node_lookup_fwd begin match self with | BetreeNodeInternal node -> begin match betree_load_internal_node_fwd node.betree_internal_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, msgs) -> begin match betree_node_lookup_first_message_for_key_fwd key msgs with - | Fail -> Fail + | Fail e -> Fail e | Return pending -> begin match pending with | BetreeListCons p l -> @@ -491,12 +494,12 @@ let rec betree_node_lookup_fwd then begin match betree_internal_lookup_in_children_fwd node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, opt) -> begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, msg) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st1, opt) end end @@ -506,44 +509,44 @@ let rec betree_node_lookup_fwd begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, BetreeMessageInsert v) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, Some v) end | BetreeMessageDelete -> begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, BetreeMessageDelete) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, None) end | BetreeMessageUpsert ufs -> begin match betree_internal_lookup_in_children_fwd node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, v) -> begin match betree_node_apply_upserts_fwd (BetreeListCons (k, BetreeMessageUpsert ufs) l) v key st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (st2, v0) -> begin match betree_internal_lookup_in_children_back node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return node0 -> begin match betree_node_apply_upserts_back (BetreeListCons (k, BetreeMessageUpsert ufs) l) v key st1 with - | Fail -> Fail + | Fail e -> Fail e | Return pending0 -> begin match betree_node_lookup_first_message_for_key_back key msgs pending0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_store_internal_node_fwd node0.betree_internal_id msgs0 st2 with - | Fail -> Fail + | Fail e -> Fail e | Return (st3, _) -> Return (st3, Some v0) end end @@ -554,12 +557,12 @@ let rec betree_node_lookup_fwd end | BetreeListNil -> begin match betree_internal_lookup_in_children_fwd node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, opt) -> begin match betree_node_lookup_first_message_for_key_back key msgs BetreeListNil with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st1, opt) end end @@ -568,10 +571,10 @@ let rec betree_node_lookup_fwd end | BetreeNodeLeaf node -> begin match betree_load_leaf_node_fwd node.betree_leaf_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, bindings) -> begin match betree_node_lookup_in_bindings_fwd key bindings with - | Fail -> Fail + | Fail e -> Fail e | Return opt -> Return (st0, opt) end end @@ -586,10 +589,10 @@ and betree_node_lookup_back begin match self with | BetreeNodeInternal node -> begin match betree_load_internal_node_fwd node.betree_internal_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, msgs) -> begin match betree_node_lookup_first_message_for_key_fwd key msgs with - | Fail -> Fail + | Fail e -> Fail e | Return pending -> begin match pending with | BetreeListCons p l -> @@ -599,11 +602,11 @@ and betree_node_lookup_back begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, msg) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> begin match betree_internal_lookup_in_children_back node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return node0 -> Return (BetreeNodeInternal node0) end end @@ -613,44 +616,44 @@ and betree_node_lookup_back begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, BetreeMessageInsert v) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (BetreeNodeInternal node) end | BetreeMessageDelete -> begin match betree_node_lookup_first_message_for_key_back key msgs (BetreeListCons (k, BetreeMessageDelete) l) with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (BetreeNodeInternal node) end | BetreeMessageUpsert ufs -> begin match betree_internal_lookup_in_children_fwd node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, v) -> begin match betree_node_apply_upserts_fwd (BetreeListCons (k, BetreeMessageUpsert ufs) l) v key st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (st2, _) -> begin match betree_internal_lookup_in_children_back node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return node0 -> begin match betree_node_apply_upserts_back (BetreeListCons (k, BetreeMessageUpsert ufs) l) v key st1 with - | Fail -> Fail + | Fail e -> Fail e | Return pending0 -> begin match betree_node_lookup_first_message_for_key_back key msgs pending0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_store_internal_node_fwd node0.betree_internal_id msgs0 st2 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (BetreeNodeInternal node0) end end @@ -663,11 +666,11 @@ and betree_node_lookup_back begin match betree_node_lookup_first_message_for_key_back key msgs BetreeListNil with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> begin match betree_internal_lookup_in_children_back node key st0 with - | Fail -> Fail + | Fail e -> Fail e | Return node0 -> Return (BetreeNodeInternal node0) end end @@ -676,10 +679,10 @@ and betree_node_lookup_back end | BetreeNodeLeaf node -> begin match betree_load_leaf_node_fwd node.betree_leaf_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, bindings) -> begin match betree_node_lookup_in_bindings_fwd key bindings with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (BetreeNodeLeaf node) end end @@ -694,12 +697,12 @@ and betree_internal_lookup_in_children_fwd if key < self.betree_internal_pivot then begin match betree_node_lookup_fwd self.betree_internal_left key st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, opt) -> Return (st0, opt) end else begin match betree_node_lookup_fwd self.betree_internal_right key st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, opt) -> Return (st0, opt) end @@ -712,14 +715,14 @@ and betree_internal_lookup_in_children_back if key < self.betree_internal_pivot then begin match betree_node_lookup_back self.betree_internal_left key st with - | Fail -> Fail + | Fail e -> Fail e | Return n -> Return (Mkbetree_internal_t self.betree_internal_id self.betree_internal_pivot n self.betree_internal_right) end else begin match betree_node_lookup_back self.betree_internal_right key st with - | Fail -> Fail + | Fail e -> Fail e | Return n -> Return (Mkbetree_internal_t self.betree_internal_id self.betree_internal_pivot self.betree_internal_left n) @@ -738,7 +741,7 @@ let rec betree_node_lookup_mut_in_bindings_fwd then Return (BetreeListCons (i, i0) tl) else begin match betree_node_lookup_mut_in_bindings_fwd key tl with - | Fail -> Fail + | Fail e -> Fail e | Return l -> Return l end | BetreeListNil -> Return BetreeListNil @@ -758,7 +761,7 @@ let rec betree_node_lookup_mut_in_bindings_back then Return ret else begin match betree_node_lookup_mut_in_bindings_back key tl ret with - | Fail -> Fail + | Fail e -> Fail e | Return tl0 -> Return (BetreeListCons (i, i0) tl0) end | BetreeListNil -> Return ret @@ -771,62 +774,62 @@ let betree_node_apply_to_leaf_fwd_back result (betree_list_t (u64 & u64)) = begin match betree_node_lookup_mut_in_bindings_fwd key bindings with - | Fail -> Fail + | Fail e -> Fail e | Return bindings0 -> begin match betree_list_head_has_key_fwd u64 bindings0 key with - | Fail -> Fail + | Fail e -> Fail e | Return b -> if b then begin match betree_list_pop_front_fwd (u64 & u64) bindings0 with - | Fail -> Fail + | Fail e -> Fail e | Return hd -> begin match new_msg with | BetreeMessageInsert v -> begin match betree_list_pop_front_back (u64 & u64) bindings0 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> begin match betree_list_push_front_fwd_back (u64 & u64) bindings1 (key, v) with - | Fail -> Fail + | Fail e -> Fail e | Return bindings2 -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings2 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings3 -> Return bindings3 end end end | BetreeMessageDelete -> begin match betree_list_pop_front_back (u64 & u64) bindings0 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings1 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings2 -> Return bindings2 end end | BetreeMessageUpsert s -> let (_, i) = hd in begin match betree_upsert_update_fwd (Some i) s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_pop_front_back (u64 & u64) bindings0 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> begin match betree_list_push_front_fwd_back (u64 & u64) bindings1 (key, v) with - | Fail -> Fail + | Fail e -> Fail e | Return bindings2 -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings2 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings3 -> Return bindings3 end end @@ -839,34 +842,34 @@ let betree_node_apply_to_leaf_fwd_back | BetreeMessageInsert v -> begin match betree_list_push_front_fwd_back (u64 & u64) bindings0 (key, v) with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings1 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings2 -> Return bindings2 end end | BetreeMessageDelete -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings0 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> Return bindings1 end | BetreeMessageUpsert s -> begin match betree_upsert_update_fwd None s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_push_front_fwd_back (u64 & u64) bindings0 (key, v) with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> begin match betree_node_lookup_mut_in_bindings_back key bindings bindings1 with - | Fail -> Fail + | Fail e -> Fail e | Return bindings2 -> Return bindings2 end end @@ -886,11 +889,11 @@ let rec betree_node_apply_messages_to_leaf_fwd_back | BetreeListCons new_msg new_msgs_tl -> let (i, m) = new_msg in begin match betree_node_apply_to_leaf_fwd_back bindings i m with - | Fail -> Fail + | Fail e -> Fail e | Return bindings0 -> begin match betree_node_apply_messages_to_leaf_fwd_back bindings0 new_msgs_tl with - | Fail -> Fail + | Fail e -> Fail e | Return bindings1 -> Return bindings1 end end @@ -911,10 +914,10 @@ let rec betree_node_filter_messages_for_key_fwd_back begin match betree_list_pop_front_back (u64 & betree_message_t) (BetreeListCons (k, m) l) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_node_filter_messages_for_key_fwd_back key msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> Return msgs1 end end @@ -935,7 +938,7 @@ let rec betree_node_lookup_first_message_after_key_fwd then begin match betree_node_lookup_first_message_after_key_fwd key next_msgs with - | Fail -> Fail + | Fail e -> Fail e | Return l -> Return l end else Return (BetreeListCons (k, m) next_msgs) @@ -956,7 +959,7 @@ let rec betree_node_lookup_first_message_after_key_back then begin match betree_node_lookup_first_message_after_key_back key next_msgs ret with - | Fail -> Fail + | Fail e -> Fail e | Return next_msgs0 -> Return (BetreeListCons (k, m) next_msgs0) end else Return ret @@ -970,10 +973,10 @@ let betree_node_apply_to_internal_fwd_back result (betree_list_t (u64 & betree_message_t)) = begin match betree_node_lookup_first_message_for_key_fwd key msgs with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_list_head_has_key_fwd betree_message_t msgs0 key with - | Fail -> Fail + | Fail e -> Fail e | Return b -> if b then @@ -981,17 +984,17 @@ let betree_node_apply_to_internal_fwd_back | BetreeMessageInsert i -> begin match betree_node_filter_messages_for_key_fwd_back key msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs1 (key, BetreeMessageInsert i) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs2 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs3 -> Return msgs3 end end @@ -999,45 +1002,45 @@ let betree_node_apply_to_internal_fwd_back | BetreeMessageDelete -> begin match betree_node_filter_messages_for_key_fwd_back key msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs1 (key, BetreeMessageDelete) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs2 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs3 -> Return msgs3 end end end | BetreeMessageUpsert s -> begin match betree_list_hd_fwd (u64 & betree_message_t) msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (_, m) = p in begin match m with | BetreeMessageInsert prev -> begin match betree_upsert_update_fwd (Some prev) s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_pop_front_back (u64 & betree_message_t) msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs1 (key, BetreeMessageInsert v) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs2 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs3 -> Return msgs3 end end @@ -1045,22 +1048,22 @@ let betree_node_apply_to_internal_fwd_back end | BetreeMessageDelete -> begin match betree_upsert_update_fwd None s with - | Fail -> Fail + | Fail e -> Fail e | Return v -> begin match betree_list_pop_front_back (u64 & betree_message_t) msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs1 (key, BetreeMessageInsert v) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs2 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs3 -> Return msgs3 end end @@ -1069,22 +1072,22 @@ let betree_node_apply_to_internal_fwd_back | BetreeMessageUpsert ufs -> begin match betree_node_lookup_first_message_after_key_fwd key msgs0 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs1 (key, BetreeMessageUpsert s) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> begin match betree_node_lookup_first_message_after_key_back key msgs0 msgs2 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs3 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs3 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs4 -> Return msgs4 end end @@ -1097,11 +1100,11 @@ let betree_node_apply_to_internal_fwd_back begin match betree_list_push_front_fwd_back (u64 & betree_message_t) msgs0 (key, new_msg) with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> begin match betree_node_lookup_first_message_for_key_back key msgs msgs1 with - | Fail -> Fail + | Fail e -> Fail e | Return msgs2 -> Return msgs2 end end @@ -1119,11 +1122,11 @@ let rec betree_node_apply_messages_to_internal_fwd_back | BetreeListCons new_msg new_msgs_tl -> let (i, m) = new_msg in begin match betree_node_apply_to_internal_fwd_back msgs i m with - | Fail -> Fail + | Fail e -> Fail e | Return msgs0 -> begin match betree_node_apply_messages_to_internal_fwd_back msgs0 new_msgs_tl with - | Fail -> Fail + | Fail e -> Fail e | Return msgs1 -> Return msgs1 end end @@ -1142,31 +1145,31 @@ let rec betree_node_apply_messages_fwd begin match self with | BetreeNodeInternal node -> begin match betree_load_internal_node_fwd node.betree_internal_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, content) -> begin match betree_node_apply_messages_to_internal_fwd_back content msgs with - | Fail -> Fail + | Fail e -> Fail e | Return content0 -> begin match betree_list_len_fwd (u64 & betree_message_t) content0 with - | Fail -> Fail + | Fail e -> Fail e | Return num_msgs -> if num_msgs >= params.betree_params_min_flush_size then begin match betree_internal_flush_fwd node params node_id_cnt content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, content1) -> begin match betree_internal_flush_back node params node_id_cnt content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (node0, _) -> begin match betree_store_internal_node_fwd node0.betree_internal_id content1 st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (st2, _) -> Return (st2, ()) end end @@ -1175,7 +1178,7 @@ let rec betree_node_apply_messages_fwd begin match betree_store_internal_node_fwd node.betree_internal_id content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, _) -> Return (st1, ()) end end @@ -1183,27 +1186,27 @@ let rec betree_node_apply_messages_fwd end | BetreeNodeLeaf node -> begin match betree_load_leaf_node_fwd node.betree_leaf_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, content) -> begin match betree_node_apply_messages_to_leaf_fwd_back content msgs with - | Fail -> Fail + | Fail e -> Fail e | Return content0 -> begin match betree_list_len_fwd (u64 & u64) content0 with - | Fail -> Fail + | Fail e -> Fail e | Return len -> begin match u64_mul 2 params.betree_params_split_size with - | Fail -> Fail + | Fail e -> Fail e | Return i -> if len >= i then begin match betree_leaf_split_fwd node content0 params node_id_cnt st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, _) -> begin match betree_store_leaf_node_fwd node.betree_leaf_id BetreeListNil st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (st2, _) -> Return (st2, ()) end end @@ -1211,7 +1214,7 @@ let rec betree_node_apply_messages_fwd begin match betree_store_leaf_node_fwd node.betree_leaf_id content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, _) -> Return (st1, ()) end end @@ -1232,31 +1235,31 @@ and betree_node_apply_messages_back begin match self with | BetreeNodeInternal node -> begin match betree_load_internal_node_fwd node.betree_internal_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, content) -> begin match betree_node_apply_messages_to_internal_fwd_back content msgs with - | Fail -> Fail + | Fail e -> Fail e | Return content0 -> begin match betree_list_len_fwd (u64 & betree_message_t) content0 with - | Fail -> Fail + | Fail e -> Fail e | Return num_msgs -> if num_msgs >= params.betree_params_min_flush_size then begin match betree_internal_flush_fwd node params node_id_cnt content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, content1) -> begin match betree_internal_flush_back node params node_id_cnt content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (node0, node_id_cnt0) -> begin match betree_store_internal_node_fwd node0.betree_internal_id content1 st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (BetreeNodeInternal node0, node_id_cnt0) end @@ -1266,7 +1269,7 @@ and betree_node_apply_messages_back begin match betree_store_internal_node_fwd node.betree_internal_id content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (BetreeNodeInternal node, node_id_cnt) end end @@ -1274,32 +1277,32 @@ and betree_node_apply_messages_back end | BetreeNodeLeaf node -> begin match betree_load_leaf_node_fwd node.betree_leaf_id st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, content) -> begin match betree_node_apply_messages_to_leaf_fwd_back content msgs with - | Fail -> Fail + | Fail e -> Fail e | Return content0 -> begin match betree_list_len_fwd (u64 & u64) content0 with - | Fail -> Fail + | Fail e -> Fail e | Return len -> begin match u64_mul 2 params.betree_params_split_size with - | Fail -> Fail + | Fail e -> Fail e | Return i -> if len >= i then begin match betree_leaf_split_fwd node content0 params node_id_cnt st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, new_node) -> begin match betree_store_leaf_node_fwd node.betree_leaf_id BetreeListNil st1 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> begin match betree_leaf_split_back node content0 params node_id_cnt st0 with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt0 -> Return (BetreeNodeInternal new_node, node_id_cnt0) end @@ -1309,7 +1312,7 @@ and betree_node_apply_messages_back begin match betree_store_leaf_node_fwd node.betree_leaf_id content0 st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (BetreeNodeLeaf (Mkbetree_leaf_t node.betree_leaf_id len), node_id_cnt) @@ -1332,39 +1335,39 @@ and betree_internal_flush_fwd begin match betree_list_partition_at_pivot_fwd betree_message_t content self.betree_internal_pivot with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (msgs_left, msgs_right) = p in begin match betree_list_len_fwd (u64 & betree_message_t) msgs_left with - | Fail -> Fail + | Fail e -> Fail e | Return len_left -> if len_left >= params.betree_params_min_flush_size then begin match betree_node_apply_messages_fwd self.betree_internal_left params node_id_cnt msgs_left st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_apply_messages_back self.betree_internal_left params node_id_cnt msgs_left st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, node_id_cnt0) -> begin match betree_list_len_fwd (u64 & betree_message_t) msgs_right with - | Fail -> Fail + | Fail e -> Fail e | Return len_right -> if len_right >= params.betree_params_min_flush_size then begin match betree_node_apply_messages_fwd self.betree_internal_right params node_id_cnt0 msgs_right st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (st1, _) -> begin match betree_node_apply_messages_back self.betree_internal_right params node_id_cnt0 msgs_right st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (st1, BetreeListNil) end end @@ -1376,12 +1379,12 @@ and betree_internal_flush_fwd begin match betree_node_apply_messages_fwd self.betree_internal_right params node_id_cnt msgs_right st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_apply_messages_back self.betree_internal_right params node_id_cnt msgs_right st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (st0, msgs_left) end end @@ -1400,34 +1403,34 @@ and betree_internal_flush_back begin match betree_list_partition_at_pivot_fwd betree_message_t content self.betree_internal_pivot with - | Fail -> Fail + | Fail e -> Fail e | Return p -> let (msgs_left, msgs_right) = p in begin match betree_list_len_fwd (u64 & betree_message_t) msgs_left with - | Fail -> Fail + | Fail e -> Fail e | Return len_left -> if len_left >= params.betree_params_min_flush_size then begin match betree_node_apply_messages_fwd self.betree_internal_left params node_id_cnt msgs_left st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_apply_messages_back self.betree_internal_left params node_id_cnt msgs_left st with - | Fail -> Fail + | Fail e -> Fail e | Return (n, node_id_cnt0) -> begin match betree_list_len_fwd (u64 & betree_message_t) msgs_right with - | Fail -> Fail + | Fail e -> Fail e | Return len_right -> if len_right >= params.betree_params_min_flush_size then begin match betree_node_apply_messages_back self.betree_internal_right params node_id_cnt0 msgs_right st0 with - | Fail -> Fail + | Fail e -> Fail e | Return (n0, node_id_cnt1) -> Return (Mkbetree_internal_t self.betree_internal_id self.betree_internal_pivot n n0, node_id_cnt1) @@ -1443,7 +1446,7 @@ and betree_internal_flush_back begin match betree_node_apply_messages_back self.betree_internal_right params node_id_cnt msgs_right st with - | Fail -> Fail + | Fail e -> Fail e | Return (n, node_id_cnt0) -> Return (Mkbetree_internal_t self.betree_internal_id self.betree_internal_pivot self.betree_internal_left n, @@ -1463,12 +1466,12 @@ let betree_node_apply_fwd begin match betree_node_apply_messages_fwd self params node_id_cnt (BetreeListCons (key, new_msg) l) st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_apply_messages_back self params node_id_cnt (BetreeListCons (key, new_msg) l) st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (st0, ()) end end @@ -1484,7 +1487,7 @@ let betree_node_apply_back begin match betree_node_apply_messages_back self params node_id_cnt (BetreeListCons (key, new_msg) l) st with - | Fail -> Fail + | Fail e -> Fail e | Return (self0, node_id_cnt0) -> Return (self0, node_id_cnt0) end @@ -1494,16 +1497,16 @@ let betree_be_tree_new_fwd result (state & betree_be_tree_t) = begin match betree_node_id_counter_new_fwd with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt -> begin match betree_node_id_counter_fresh_id_fwd node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return id -> begin match betree_store_leaf_node_fwd id BetreeListNil st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_id_counter_fresh_id_back node_id_cnt with - | Fail -> Fail + | Fail e -> Fail e | Return node_id_cnt0 -> Return (st0, Mkbetree_be_tree_t (Mkbetree_params_t min_flush_size split_size) node_id_cnt0 (BetreeNodeLeaf (Mkbetree_leaf_t id 0))) @@ -1520,13 +1523,13 @@ let betree_be_tree_apply_fwd begin match betree_node_apply_fwd self.betree_be_tree_root self.betree_be_tree_params self.betree_be_tree_node_id_cnt key msg st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_node_apply_back self.betree_be_tree_root self.betree_be_tree_params self.betree_be_tree_node_id_cnt key msg st with - | Fail -> Fail + | Fail e -> Fail e | Return (_, _) -> Return (st0, ()) end end @@ -1539,7 +1542,7 @@ let betree_be_tree_apply_back begin match betree_node_apply_back self.betree_be_tree_root self.betree_be_tree_params self.betree_be_tree_node_id_cnt key msg st with - | Fail -> Fail + | Fail e -> Fail e | Return (n, nic) -> Return (Mkbetree_be_tree_t self.betree_be_tree_params nic n) end @@ -1551,11 +1554,11 @@ let betree_be_tree_insert_fwd = begin match betree_be_tree_apply_fwd self key (BetreeMessageInsert value) st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_be_tree_apply_back self key (BetreeMessageInsert value) st with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, ()) end end @@ -1567,7 +1570,7 @@ let betree_be_tree_insert_back = begin match betree_be_tree_apply_back self key (BetreeMessageInsert value) st with - | Fail -> Fail + | Fail e -> Fail e | Return self0 -> Return self0 end @@ -1575,10 +1578,10 @@ let betree_be_tree_insert_back let betree_be_tree_delete_fwd (self : betree_be_tree_t) (key : u64) (st : state) : result (state & unit) = begin match betree_be_tree_apply_fwd self key BetreeMessageDelete st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_be_tree_apply_back self key BetreeMessageDelete st with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, ()) end end @@ -1589,7 +1592,7 @@ let betree_be_tree_delete_back result betree_be_tree_t = begin match betree_be_tree_apply_back self key BetreeMessageDelete st with - | Fail -> Fail + | Fail e -> Fail e | Return self0 -> Return self0 end @@ -1601,11 +1604,11 @@ let betree_be_tree_upsert_fwd = begin match betree_be_tree_apply_fwd self key (BetreeMessageUpsert upd) st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, _) -> begin match betree_be_tree_apply_back self key (BetreeMessageUpsert upd) st with - | Fail -> Fail + | Fail e -> Fail e | Return _ -> Return (st0, ()) end end @@ -1618,7 +1621,7 @@ let betree_be_tree_upsert_back = begin match betree_be_tree_apply_back self key (BetreeMessageUpsert upd) st with - | Fail -> Fail + | Fail e -> Fail e | Return self0 -> Return self0 end @@ -1628,7 +1631,7 @@ let betree_be_tree_lookup_fwd result (state & (option u64)) = begin match betree_node_lookup_fwd self.betree_be_tree_root key st with - | Fail -> Fail + | Fail e -> Fail e | Return (st0, opt) -> Return (st0, opt) end @@ -1638,7 +1641,7 @@ let betree_be_tree_lookup_back result betree_be_tree_t = begin match betree_node_lookup_back self.betree_be_tree_root key st with - | Fail -> Fail + | Fail e -> Fail e | Return n -> Return (Mkbetree_be_tree_t self.betree_be_tree_params self.betree_be_tree_node_id_cnt n) diff --git a/tests/fstar/betree/Primitives.fst b/tests/fstar/betree/Primitives.fst index 96138e46..82622656 100644 --- a/tests/fstar/betree/Primitives.fst +++ b/tests/fstar/betree/Primitives.fst @@ -18,9 +18,13 @@ let rec list_update #a ls i x = #pop-options (*** Result *) +type error : Type0 = +| Failure +| OutOfFuel + type result (a : Type0) : Type0 = | Return : v:a -> result a -| Fail : result a +| Fail : e:error -> result a // Monadic bind and return. // Re-definining those allows us to customize the result of the monadic notations @@ -29,10 +33,10 @@ let return (#a : Type0) (x:a) : result a = Return x let bind (#a #b : Type0) (m : result a) (f : a -> result b) : result b = match m with | Return x -> f x - | Fail -> Fail + | Fail e -> Fail e // Monadic assert(...) -let massert (b:bool) : result unit = if b then Return () else Fail +let massert (b:bool) : result unit = if b then Return () else Fail Failure // Normalize and unwrap a successful result (used for globals). let eval_global (#a : Type0) (x : result a{Return? (normalize_term x)}) : a = Return?.v x @@ -119,12 +123,12 @@ let scalar_max (ty : scalar_ty) : int = type scalar (ty : scalar_ty) : eqtype = x:int{scalar_min ty <= x && x <= scalar_max ty} let mk_scalar (ty : scalar_ty) (x : int) : result (scalar ty) = - if scalar_min ty <= x && scalar_max ty >= x then Return x else Fail + if scalar_min ty <= x && scalar_max ty >= x then Return x else Fail Failure let scalar_neg (#ty : scalar_ty) (x : scalar ty) : result (scalar ty) = mk_scalar ty (-x) let scalar_div (#ty : scalar_ty) (x : scalar ty) (y : scalar ty) : result (scalar ty) = - if y <> 0 then mk_scalar ty (x / y) else Fail + if y <> 0 then mk_scalar ty (x / y) else Fail Failure /// The remainder operation let int_rem (x : int) (y : int{y <> 0}) : int = @@ -137,7 +141,7 @@ let _ = assert_norm(int_rem 1 (-2) = 1) let _ = assert_norm(int_rem (-1) (-2) = -1) let scalar_rem (#ty : scalar_ty) (x : scalar ty) (y : scalar ty) : result (scalar ty) = - if y <> 0 then mk_scalar ty (int_rem x y) else Fail + if y <> 0 then mk_scalar ty (int_rem x y) else Fail Failure let scalar_add (#ty : scalar_ty) (x : scalar ty) (y : scalar ty) : result (scalar ty) = mk_scalar ty (x + y) @@ -258,7 +262,7 @@ let vec_push_back (a : Type0) (v : vec a) (x : a) : (requires True) (ensures (fun res -> match res with - | Fail -> True + | Fail e -> e == Failure | Return v' -> length v' = length v + 1)) = if length v < usize_max then begin (**) assert_norm(length [x] == 1); @@ -266,22 +270,22 @@ let vec_push_back (a : Type0) (v : vec a) (x : a) : (**) assert(length (append v [x]) = length v + 1); Return (append v [x]) end - else Fail + else Fail Failure // The **forward** function shouldn't be used let vec_insert_fwd (a : Type0) (v : vec a) (i : usize) (x : a) : result unit = - if i < length v then Return () else Fail + if i < length v then Return () else Fail Failure let vec_insert_back (a : Type0) (v : vec a) (i : usize) (x : a) : result (vec a) = - if i < length v then Return (list_update v i x) else Fail + if i < length v then Return (list_update v i x) else Fail Failure // The **backward** function shouldn't be used let vec_index_fwd (a : Type0) (v : vec a) (i : usize) : result a = - if i < length v then Return (index v i) else Fail + if i < length v then Return (index v i) else Fail Failure let vec_index_back (a : Type0) (v : vec a) (i : usize) (x : a) : result unit = - if i < length v then Return () else Fail + if i < length v then Return () else Fail Failure let vec_index_mut_fwd (a : Type0) (v : vec a) (i : usize) : result a = - if i < length v then Return (index v i) else Fail + if i < length v then Return (index v i) else Fail Failure let vec_index_mut_back (a : Type0) (v : vec a) (i : usize) (nx : a) : result (vec a) = - if i < length v then Return (list_update v i nx) else Fail + if i < length v then Return (list_update v i nx) else Fail Failure -- cgit v1.2.3