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|
(** Utilities for extracting names *)
open Charon.NameMatcher
open Errors
let log = Logging.extract_log
let match_with_trait_decl_refs = true
module NameMatcherMap = struct
module NMM = NameMatcherMap
type 'a t = 'a NMM.t
let config = { map_vars_to_vars = true; match_with_trait_decl_refs }
let find_opt (ctx : ctx) (name : Types.name) (m : 'a t) : 'a option =
NMM.find_opt ctx config name m
let find_with_generics_opt (ctx : ctx) (name : Types.name)
(g : Types.generic_args) (m : 'a t) : 'a option =
NMM.find_with_generics_opt ctx config name g m
let mem (ctx : ctx) (name : Types.name) (m : 'a t) : bool =
NMM.mem ctx config name m
let of_list (ls : (pattern * 'a) list) : 'a t = NMM.of_list ls
let to_string = NMM.to_string
end
(** Helper to convert name patterns to names for extraction.
For impl blocks, we simply use the name of the type (without its arguments)
if all the arguments are variables.
*)
let pattern_to_extract_name (span : Meta.span option) (name : pattern) :
string list =
let c = { tgt = TkName } in
let all_vars =
let check (g : generic_arg) : bool =
match g with GExpr (EVar _) | GRegion (RVar _) -> true | _ -> false
in
List.for_all check
in
(* This is a bit of a hack: we want to simplify the occurrences of
tuples of two variables, arrays with only variables, slices with
only variables, etc.
We explore the pattern and replace such occurrences with a specific name.
*)
let replace_option_name (id : pattern) =
match id with
| [ PIdent ("core", []); PIdent ("option", []); PIdent ("Option", g) ] ->
(* Option *)
[ PIdent ("Option", g) ]
| _ -> id
in
let visitor =
object
inherit [_] map_pattern as super
method! visit_PIdent _ s g =
if all_vars g then super#visit_PIdent () s []
else super#visit_PIdent () s g
method! visit_EComp _ id =
(* Simplify if this is [Option] *)
super#visit_EComp () (replace_option_name id)
method! visit_PImpl _ ty =
match ty with
| EComp id -> (
(* Only keep the last ident *)
let id = Collections.List.last id in
match id with
| PIdent (_, _) -> super#visit_PImpl () (EComp [ id ])
| PImpl _ -> craise_opt_span __FILE__ __LINE__ span "Unreachable")
| _ -> super#visit_PImpl () ty
method! visit_EPrimAdt _ adt g =
if all_vars g then
match adt with
| TTuple ->
let l = List.length g in
if l = 2 then EComp [ PIdent ("Pair", []) ]
else super#visit_EPrimAdt () adt g
| TArray -> EComp [ PIdent ("Array", []) ]
| TSlice -> EComp [ PIdent ("Slice", []) ]
else if adt = TTuple && List.length g = 2 then
super#visit_EComp () [ PIdent ("Pair", g) ]
else super#visit_EPrimAdt () adt g
end
in
let name = visitor#visit_pattern () name in
List.map (pattern_elem_to_string c) name
let pattern_to_type_extract_name = pattern_to_extract_name None
let pattern_to_fun_extract_name = pattern_to_extract_name None
let pattern_to_trait_impl_extract_name = pattern_to_extract_name None
(* TODO: this is provisional. We just want to make sure that the extraction
names we derive from the patterns (for the builtin definitions) are
consistent with the extraction names we derive from the Rust names *)
let name_to_simple_name (ctx : ctx) (n : Types.name) : string list =
let c : to_pat_config =
{ tgt = TkName; use_trait_decl_refs = match_with_trait_decl_refs }
in
pattern_to_extract_name None (name_to_pattern ctx c n)
(** If the [prefix] is Some, we attempt to remove the common prefix
between [prefix] and [name] from [name] *)
let name_with_generics_to_simple_name (ctx : ctx)
?(prefix : Types.name option = None) (name : Types.name)
(p : Types.generic_params) (g : Types.generic_args) : string list =
let c : to_pat_config =
{ tgt = TkName; use_trait_decl_refs = match_with_trait_decl_refs }
in
let name = name_with_generics_to_pattern ctx c p name g in
let name =
match prefix with
| None -> name
| Some prefix ->
let prefix =
name_with_generics_to_pattern ctx c TypesUtils.empty_generic_params
prefix TypesUtils.empty_generic_args
in
let _, _, name = pattern_common_prefix { equiv = true } prefix name in
name
in
pattern_to_extract_name None name
|
