Revision 675c6bd12c2d1636888e012a6e4f310d875f38fa authored by Benjamin Gregoire on 04 January 2016, 12:56:17 UTC, committed by Pierre-Yves Strub on 04 January 2016, 14:26:55 UTC
1 parent 1d1f362
ecTyping.ml
(* --------------------------------------------------------------------
* Copyright (c) - 2012--2016 - IMDEA Software Institute
* Copyright (c) - 2012--2016 - Inria
*
* Distributed under the terms of the CeCILL-C-V1 license
* -------------------------------------------------------------------- *)
(* -------------------------------------------------------------------- *)
open EcUtils
open EcPath
open EcMaps
open EcSymbols
open EcLocation
open EcParsetree
open EcTypes
open EcDecl
open EcModules
open EcFol
module MMsym = EcSymbols.MMsym
module Mid = EcIdent.Mid
module EqTest = EcReduction.EqTest
module NormMp = EcEnv.NormMp
module TC = EcTypeClass
(* -------------------------------------------------------------------- *)
type opmatch = [
| `Op of EcPath.path * EcTypes.ty list
| `Lc of EcIdent.t
| `Var of EcTypes.prog_var
| `Proj of EcTypes.prog_var * EcTypes.ty * (int * int)
]
type mismatch_funsig =
| MF_targs of ty * ty (* expected, got *)
| MF_tres of ty * ty (* expected, got *)
| MF_restr of EcEnv.env * [`Eq of Sx.t * Sx.t | `Sub of Sx.t ]
type tymod_cnv_failure =
| E_TyModCnv_ParamCountMismatch
| E_TyModCnv_ParamTypeMismatch of EcIdent.t
| E_TyModCnv_MissingComp of symbol
| E_TyModCnv_MismatchFunSig of symbol * mismatch_funsig
type modapp_error =
| MAE_WrongArgCount of int * int (* expected, got *)
| MAE_InvalidArgType of EcPath.mpath * tymod_cnv_failure
| MAE_AccesSubModFunctor
type modtyp_error =
| MTE_FunSigDoesNotRepeatArgNames
| MTE_InternalFunctor
type funapp_error =
| FAE_WrongArgCount
type mem_error =
| MAE_IsConcrete
type tyerror =
| UniVarNotAllowed
| FreeTypeVariables
| TypeVarNotAllowed
| OnlyMonoTypeAllowed of symbol option
| TmemNotAllowed of ty
| TmemTyNotFound of symbol * ty
| UnboundTypeParameter of symbol
| UnknownTypeName of qsymbol
| UnknownTypeClass of qsymbol
| UnknownRecFieldName of qsymbol
| DuplicatedRecFieldName of symbol
| MissingRecField of symbol
| MixingRecFields of EcPath.path tuple2
| UnknownProj of qsymbol
| AmbiguousProj of qsymbol
| AmbiguousProji of int * ty
| InvalidTypeAppl of qsymbol * int * int
| DuplicatedTyVar
| DuplicatedLocal of symbol
| DuplicatedField of symbol
| NonLinearPattern
| LvNonLinear
| NonUnitFunWithoutReturn
| TypeMismatch of (ty * ty) * (ty * ty)
| TypeClassMismatch
| TypeModMismatch of tymod_cnv_failure
| NotAFunction
| AbbrevLowArgs
| UnknownVarOrOp of qsymbol * ty list
| MultipleOpMatch of qsymbol * ty list * (opmatch * EcUnify.unienv) list
| UnknownModName of qsymbol
| UnknownTyModName of qsymbol
| UnknownFunName of qsymbol
| UnknownModVar of qsymbol
| UnknownMemName of symbol
| UnknownDistrName of symbol
| InvalidFunAppl of funapp_error
| InvalidModAppl of modapp_error
| InvalidModType of modtyp_error
| InvalidMem of symbol * mem_error
| FunNotInModParam of qsymbol
| NoActiveMemory
| NoActiveDistr
| PatternNotAllowed
| MemNotAllowed
| UnknownScope of qsymbol
exception TyError of EcLocation.t * EcEnv.env * tyerror
let tyerror loc env e = raise (TyError (loc, env, e))
(* -------------------------------------------------------------------- *)
type restriction_who =
| RW_mod of EcPath.mpath
| RW_fun of EcPath.xpath
type restriction_err =
| RE_UseVariable of EcPath.xpath
| RE_UseVariableViaModule of EcPath.xpath * EcPath.mpath
| RE_UseModule of EcPath.mpath
| RE_VMissingRestriction of EcPath.xpath * EcPath.mpath pair
| RE_MMissingRestriction of EcPath.mpath * EcPath.mpath pair
type restriction_error = restriction_who * restriction_err
exception RestrictionError of EcEnv.env * restriction_error
(* -------------------------------------------------------------------- *)
type ptnmap = ty EcIdent.Mid.t ref
(* -------------------------------------------------------------------- *)
let ident_of_osymbol x =
omap unloc x |> odfl "_" |> EcIdent.create
(* -------------------------------------------------------------------- *)
module UE = EcUnify.UniEnv
let unify_or_fail (env : EcEnv.env) ue loc ~expct:ty1 ty2 =
try EcUnify.unify env ue ty1 ty2
with EcUnify.UnificationFailure pb ->
match pb with
| `TyUni (t1, t2)->
let tyinst = Tuni.offun (UE.assubst ue) in
tyerror loc env (TypeMismatch ((tyinst ty1, tyinst ty2),
(tyinst t1, tyinst t2)))
| `TcCtt _ ->
tyerror loc env TypeClassMismatch
(* -------------------------------------------------------------------- *)
let e_inuse =
let rec inuse (map : Sx.t) (e : expr) =
match e.e_node with
| Evar p -> begin
match p.pv_kind with
| PVglob -> Sx.add p.pv_name map
| _ -> map
end
| _ -> e_fold inuse map e
in
fun e -> inuse Sx.empty e
(* -------------------------------------------------------------------- *)
let empty_uses : uses = mk_uses [] Sx.empty Sx.empty
let add_call (u : uses) p : uses =
mk_uses (p::u.us_calls) u.us_reads u.us_writes
let add_read (u : uses) p : uses =
if is_glob p then
mk_uses u.us_calls (Sx.add p.pv_name u.us_reads) u.us_writes
else u
let add_write (u : uses) p : uses =
if is_glob p then
mk_uses u.us_calls u.us_reads (Sx.add p.pv_name u.us_writes)
else u
let (_i_inuse, s_inuse, se_inuse) =
let rec lv_inuse (map : uses) (lv : lvalue) =
match lv with
| LvVar (p,_) ->
add_write map p
| LvTuple ps ->
List.fold_left
(fun map (p, _) -> add_write map p)
map ps
| LvMap (_, p, e, _) ->
(* Maps are not modified in place but feed to a mutator
operator that returns the augmented map and assigning the
result to [p]. Hence the [`Read | `Write] flag. *)
let map = add_write (add_read map p) p in
let map = se_inuse map e in
map
and i_inuse (map : uses) (i : instr) =
match i.i_node with
| Sasgn (lv, e) ->
let map = lv_inuse map lv in
let map = se_inuse map e in
map
| Srnd (lv, e) ->
let map = lv_inuse map lv in
let map = se_inuse map e in
map
| Scall (lv, p, es) -> begin
let map = List.fold_left se_inuse map es in
let map = add_call map p in
let map = lv |> ofold ((^~) lv_inuse) map in
map
end
| Sif (e, s1, s2) ->
let map = se_inuse map e in
let map = s_inuse map s1 in
let map = s_inuse map s2 in
map
| Swhile (e, s) ->
let map = se_inuse map e in
let map = s_inuse map s in
map
| Sassert e ->
se_inuse map e
| Sabstract _ -> assert false (* FIXME *)
and s_inuse (map : uses) (s : stmt) =
List.fold_left i_inuse map s.s_node
and se_inuse (u : uses) (e : expr) =
mk_uses u.us_calls (Sx.union u.us_reads (e_inuse e)) u.us_writes
in
(i_inuse empty_uses, s_inuse empty_uses, se_inuse)
(* -------------------------------------------------------------------- *)
let rec as_tmem env ty =
match ty.ty_node with
| Tmem _ -> true
| Tconstr(p,_) ->
let inp =
let td = EcEnv.Ty.by_path p env in
match td.tyd_type with
| `Concrete ty -> as_tmem env ty
| `Abstract _ -> false
| `Datatype tyd -> false
(* FIXME
List.exists (snd_app (List.exists (as_tmem env))) tyd.tydt_ctors *)
| `Record (_, l) -> List.exists (snd_app (as_tmem env)) l in
inp || ty_sub_exists (as_tmem env) ty
| _ -> ty_sub_exists (as_tmem env) ty
(* -------------------------------------------------------------------- *)
let select_local env (qs,s) =
if qs = []
then EcEnv.Var.lookup_local_opt s env
else None
(* -------------------------------------------------------------------- *)
let select_pv env side name ue tvi psig =
if tvi <> None
then []
else
try
let pvs = EcEnv.Var.lookup_progvar ?side name env in
let select (pv,ty) =
let subue = UE.copy ue in
let texpected = EcUnify.tfun_expected subue psig in
try
EcUnify.unify env subue ty texpected;
[(pv, ty, subue)]
with EcUnify.UnificationFailure _ -> []
in
select pvs
with EcEnv.LookupFailure _ -> []
(* -------------------------------------------------------------------- *)
module OpSelect = struct
type pvsel = [
| `Proj of EcTypes.prog_var * EcTypes.ty * (int * int)
| `Var of EcTypes.prog_var
]
type opsel = [
| `Pv of form option * pvsel
| `Op of (EcPath.path * ty list)
| `Lc of EcIdent.ident
| `Nt of EcUnify.sbody
]
type mode = [`Form | `Expr of [`InProc | `InOp]]
type gopsel =
opsel * EcTypes.ty * EcUnify.unienv * opmatch
end
let gen_select_op
~(actonly : bool)
~(mode : OpSelect.mode)
(opsc : path option)
(tvi : EcUnify.tvi)
(env : EcEnv.env)
(name : EcSymbols.qsymbol)
(ue : EcUnify.unienv)
(psig : EcTypes.dom)
: OpSelect.gopsel list
=
let fpv me (pv, ty, ue) =
(`Pv (me, pv), ty, ue, (pv :> opmatch))
and fop (op, ty, ue, bd) =
match bd with
| None -> (`Op op, ty, ue, (`Op op :> opmatch))
| Some bd -> (`Nt bd, ty, ue, (`Op op :> opmatch))
and flc (lc, ty, ue) =
(`Lc lc, ty, ue, (`Lc lc :> opmatch)) in
let ue_filter =
match mode with
| `Expr _ -> fun op -> not (EcDecl.is_pred op)
| `Form -> fun _ -> true
in
let by_scope opsc ((p, _), _, _, _) =
EcPath.p_equal opsc (oget (EcPath.prefix p))
and by_current ((p, _), _, _, _) =
EcPath.isprefix (oget (EcPath.prefix p)) (EcEnv.root env)
and by_tc ((p, _), _, _, _) =
match oget (EcEnv.Op.by_path_opt p env) with
| { op_kind = OB_oper (Some OP_TC) } -> false
| _ -> true
in
match (if tvi = None then select_local env name else None) with
| Some (id, ty) ->
[ flc (id, ty, ue) ]
| None ->
let ops () =
let ops = EcUnify.select_op ~filter:ue_filter tvi env name ue psig in
let ops = opsc |> ofold (fun opsc -> List.mbfilter (by_scope opsc)) ops in
let ops = match List.mbfilter by_current ops with [] -> ops | ops -> ops in
let ops = match List.mbfilter by_tc ops with [] -> ops | ops -> ops in
(List.map fop ops)
and pvs () =
let me, pvs =
match EcEnv.Memory.get_active env, actonly with
| None, true -> (None, [])
| me , _ -> ( me, select_pv env (omap destr_local me) name ue tvi psig)
in List.map (fpv me) pvs
in
match mode with
| `Expr `InOp -> ops ()
| `Form -> (match pvs () with [] -> ops () | pvs -> pvs)
| `Expr `InProc -> (match pvs () with [] -> ops () | pvs -> pvs)
(* -------------------------------------------------------------------- *)
let select_exp_op env mode opsc name ue tvi psig =
gen_select_op ~actonly:false ~mode:(`Expr mode)
opsc tvi env name ue psig
(* -------------------------------------------------------------------- *)
let select_form_op env opsc name ue tvi psig =
gen_select_op ~actonly:true ~mode:`Form
opsc tvi env name ue psig
(* -------------------------------------------------------------------- *)
let select_proj env opsc name ue tvi recty =
let filter = (fun op -> EcDecl.is_proj op) in
let ops = EcUnify.select_op ~filter tvi env name ue [recty] in
let ops = List.map (fun (p, ty, ue, _) -> (p, ty, ue)) ops in
match ops, opsc with
| _ :: _ :: _, Some opsc ->
List.filter
(fun ((p, _), _, _) ->
EcPath.p_equal opsc (oget (EcPath.prefix p)))
ops
| _, _ -> ops
(* -------------------------------------------------------------------- *)
let lookup_scope env popsc =
match unloc popsc with
| ([], x) when x = EcCoreLib.i_top -> EcCoreLib.p_top
| _ -> begin
match EcEnv.Theory.lookup_opt (unloc popsc) env with
| None -> tyerror popsc.pl_loc env (UnknownScope (unloc popsc))
| Some opsc -> fst opsc
end
(* -------------------------------------------------------------------- *)
type typolicy = {
tp_uni : bool; (* "_" (Tuniar) allowed *)
tp_tvar : bool; (* type variable allowed *)
}
let tp_tydecl = { tp_uni = false; tp_tvar = true ; } (* type decl. *)
let tp_relax = { tp_uni = true ; tp_tvar = true ; } (* ops/forms/preds *)
let tp_nothing = { tp_uni = false; tp_tvar = false; } (* module type annot. *)
let tp_uni = { tp_uni = true ; tp_tvar = false; } (* params/local vars. *)
(* -------------------------------------------------------------------- *)
let transtcs (env : EcEnv.env) tcs =
let for1 tc =
match EcEnv.TypeClass.lookup_opt (unloc tc) env with
| None -> tyerror tc.pl_loc env (UnknownTypeClass (unloc tc))
| Some (p, _) -> p (* FIXME: TC HOOK *)
in
Sp.of_list (List.map for1 tcs)
(* -------------------------------------------------------------------- *)
let transtyvars (env : EcEnv.env) (loc, tparams) =
let tparams = tparams |> omap
(fun tparams ->
let for1 ({ pl_desc = x }, tc) = (EcIdent.create x, transtcs env tc) in
if not (List.is_unique (List.map (unloc |- fst) tparams)) then
tyerror loc env DuplicatedTyVar;
List.map for1 tparams)
in
EcUnify.UniEnv.create tparams
(* -------------------------------------------------------------------- *)
exception TymodCnvFailure of tymod_cnv_failure
let tymod_cnv_failure e =
raise (TymodCnvFailure e)
let tysig_item_name = function
| Tys_function (f, _) -> f.fs_name
let tysig_item_kind = function
| Tys_function _ -> `Function
let rec check_sig_cnv mode (env:EcEnv.env) (sin:module_sig) (sout:module_sig) =
(* Check parameters for compatibility. Parameters names may be
* different, hence, substitute in [tin.tym_params] types the names
* of [tout.tym_params] *)
if List.length sin.mis_params <> List.length sout.mis_params then
tymod_cnv_failure E_TyModCnv_ParamCountMismatch;
let bsubst =
List.fold_left2
(fun subst (xin, tyin) (xout, tyout) ->
let tyout = EcSubst.subst_modtype subst tyout in
check_modtype_cnv ~mode env tyout tyin;
EcSubst.add_module subst xout (EcPath.mident xin))
EcSubst.empty sin.mis_params sout.mis_params
in
(* Check for body inclusion (w.r.t the parameters names substitution).
* This includes:
* - functions inclusion with equal signatures + included use modifiers.
*)
let tin = sin.mis_body
and tout = EcSubst.subst_modsig_body bsubst sout.mis_body in
let env =
List.fold_left (fun env (xin,tyin) ->
EcEnv.Mod.bind_local xin tyin (EcPath.Sx.empty, EcPath.Sm.empty) env)
env sin.mis_params in
let check_item_compatible =
let check_fun_compatible (fin,oin) (fout,oout) =
assert (fin.fs_name = fout.fs_name);
let (iargs, oargs) = (fin.fs_arg, fout.fs_arg) in
let (ires , ores ) = (fin.fs_ret, fout.fs_ret) in
if not (EqTest.for_type env iargs oargs) then
tymod_cnv_failure
(E_TyModCnv_MismatchFunSig(fin.fs_name,MF_targs(oargs,iargs)));
if not (EqTest.for_type env ires ores) then
tymod_cnv_failure
(E_TyModCnv_MismatchFunSig(fin.fs_name,MF_tres(ores,ires)));
let norm oi =
List.fold_left (fun s f ->
EcPath.Sx.add (EcEnv.NormMp.norm_xfun env f) s)
EcPath.Sx.empty oi.oi_calls
in
let icalls = norm oin in
let ocalls = norm oout in
match mode with
| `Sub ->
if not (Sx.subset icalls ocalls) then
let sx = Sx.diff icalls ocalls in
tymod_cnv_failure
(E_TyModCnv_MismatchFunSig(fin.fs_name, MF_restr(env, `Sub sx)))
| `Eq ->
if not (Sx.equal icalls ocalls) then
tymod_cnv_failure
(E_TyModCnv_MismatchFunSig(fin.fs_name,
MF_restr(env, `Eq(ocalls, icalls))))
in
fun i_item o_item ->
match i_item, o_item with
| Tys_function (fin,oin), Tys_function (fout,oout) ->
check_fun_compatible (fin,oin) (fout,oout)
in
let check_for_item (o_item : module_sig_body_item) =
let o_name = tysig_item_name o_item
and o_kind = tysig_item_kind o_item in
let i_item =
List.ofind
(fun i_item ->
(tysig_item_name i_item) = o_name
&& (tysig_item_kind i_item) = o_kind)
tin
in
match i_item with
| None -> tymod_cnv_failure (E_TyModCnv_MissingComp o_name)
| Some i_item -> check_item_compatible i_item o_item
in
List.iter check_for_item tout;
if mode = `Eq then begin
List.iter
(fun i_item ->
let i_name = tysig_item_name i_item
and i_kind = tysig_item_kind i_item in
let b =
List.exists
(fun o_item ->
(tysig_item_name o_item) = i_name
&& (tysig_item_kind o_item) = i_kind)
tout
in
if not b then
tymod_cnv_failure (E_TyModCnv_MissingComp i_name))
tin
end
and check_modtype_cnv
?(mode = `Eq) env (tyin:module_type) (tyout:module_type)
=
let sin = EcEnv.ModTy.sig_of_mt env tyin in
let sout = EcEnv.ModTy.sig_of_mt env tyout in
check_sig_cnv mode env sin sout
let check_sig_mt_cnv env sin tyout =
let sout = EcEnv.ModTy.sig_of_mt env tyout in
check_sig_cnv `Sub env sin sout
(* -------------------------------------------------------------------- *)
let check_restrictions env who use restr =
let re_error = fun env x -> raise (RestrictionError (env, (who, x))) in
let restr = NormMp.norm_restr env restr in
let check_xp xp _ =
(* We check that the variable is not a variable in restr *)
if NormMp.use_mem_xp xp restr then
re_error env (RE_UseVariable xp);
(* We check that the variable is in the restriction of the
* abstract module in restr. *)
let check id2 =
let mp2 = EcPath.mident id2 in
let r2 = NormMp.get_restr env mp2 in
if not (NormMp.use_mem_xp xp r2) then
re_error env (RE_UseVariableViaModule (xp, mp2));
in
EcIdent.Sid.iter check restr.EcEnv.us_gl
in
EcPath.Mx.iter check_xp (use.EcEnv.us_pv);
let check_gl id =
let mp1 = EcPath.mident id in
if NormMp.use_mem_gl mp1 restr then
re_error env (RE_UseModule mp1);
let r1 = NormMp.get_restr env mp1 in
let check_v xp2 _ =
if not (NormMp.use_mem_xp xp2 r1) then
re_error env (RE_VMissingRestriction (xp2, (xp2.x_top, mp1)))
in
Mx.iter check_v restr.EcEnv.us_pv;
let check_g id2 =
let mp2 = EcPath.mident id2 in
if not (NormMp.use_mem_gl mp2 r1) then
let r2 = NormMp.get_restr env mp2 in
if not (NormMp.use_mem_gl mp1 r2) then
re_error env (RE_MMissingRestriction (mp1, (mp1, mp2)));
in
EcIdent.Sid.iter check_g restr.EcEnv.us_gl
in
EcIdent.Sid.iter check_gl use.EcEnv.us_gl
let check_restrictions_fun env xp use restr =
check_restrictions env (RW_fun xp) use restr
(* -------------------------------------------------------------------- *)
let check_modtype_with_restrictions env mp mt i restr =
check_sig_mt_cnv env mt i;
let use = NormMp.mod_use env mp in
check_restrictions env (RW_mod mp) use restr
(* -------------------------------------------------------------------- *)
let split_msymb (env : EcEnv.env) (msymb : pmsymbol located) =
let (top, args, sm) =
try
let (r, (x, args), sm) =
List.find_pivot (fun (_,args) -> args <> None) msymb.pl_desc
in
(List.rev_append r [x, None], args, sm)
with Not_found ->
(msymb.pl_desc, None, [])
in
let (top, sm) =
let ca (x, args) =
if args <> None then
tyerror msymb.pl_loc env
(InvalidModAppl (MAE_WrongArgCount(0, List.length (oget args))));
x
in
(List.map ca top, List.map ca sm)
in
(top, args, sm)
(* -------------------------------------------------------------------- *)
let rec trans_msymbol (env : EcEnv.env) (msymb : pmsymbol located) =
let loc = msymb.pl_loc in
let (top, args, sm) = split_msymb env msymb in
let to_qsymbol l =
match List.rev l with
| [] -> assert false
| x::qn ->
{ pl_desc = (List.rev_map unloc qn, unloc x);
pl_loc = x.pl_loc; }
in
let top_qname = to_qsymbol (top@sm) in
let (top_path, {EcEnv.sp_target = mod_expr; EcEnv.sp_params = (spi, params)}) =
match EcEnv.Mod.sp_lookup_opt top_qname.pl_desc env with
| None ->
tyerror top_qname.pl_loc env (UnknownModName top_qname.pl_desc)
| Some me -> me
in
let (params, istop) =
match top_path.EcPath.m_top with
| `Concrete (_, Some sub) ->
if mod_expr.me_sig.mis_params <> [] then
assert false;
if args <> None then
if not (EcPath.p_size sub = List.length sm) then
tyerror loc env
(InvalidModAppl (MAE_WrongArgCount(EcPath.p_size sub,
List.length sm)));
(params, false)
| `Concrete (p, None) ->
if (params <> []) || ((spi+1) <> EcPath.p_size p) then
assert false;
(mod_expr.me_sig.mis_params, true)
| `Local _m ->
if (params <> []) || spi <> 0 then
assert false;
(mod_expr.me_sig.mis_params, true)
in
let args = args |> omap (List.map (trans_msymbol env)) in
match args with
| None ->
if not istop && params <> [] then
tyerror loc env (InvalidModAppl MAE_AccesSubModFunctor);
((top_path,loc), mod_expr.me_sig)
| Some args ->
let lena = List.length args in
let lenp = List.length params in
if lena > lenp then
tyerror loc env (InvalidModAppl (MAE_WrongArgCount(lenp, lena)));
let params, remn = List.takedrop lena params in
let args = List.map2
(fun (_,tp) ((a,loc),ta) ->
try check_sig_mt_cnv env ta tp; a
with TymodCnvFailure error ->
tyerror loc env (InvalidModAppl (MAE_InvalidArgType(a, error))))
params args in
let subst =
List.fold_left2
(fun s (x,_) a -> EcSubst.add_module s x a)
EcSubst.empty params args
in
let keepcall =
let used = EcIdent.Sid.of_list (List.map fst params) in
fun xp ->
match xp.EcPath.x_top.EcPath.m_top with
| `Local id -> not (EcIdent.Sid.mem id used)
| _ -> true
in
let body =
List.map
(fun (Tys_function (s, oi)) ->
Tys_function(s, { oi_calls = List.filter keepcall oi.oi_calls;
oi_in = oi.oi_in; }))
mod_expr.me_sig.mis_body
in
let body = EcSubst.subst_modsig_body subst body in
((EcPath.mpath top_path.EcPath.m_top args, loc),
{mis_params = remn; mis_body = body})
let trans_msymbol env msymb =
let ((m,_),mt) = trans_msymbol env msymb in
(m,mt)
(* -------------------------------------------------------------------- *)
let rec transty (tp : typolicy) (env : EcEnv.env) ue ty =
match ty.pl_desc with
| PTunivar ->
if tp.tp_uni
then UE.fresh ue
else tyerror ty.pl_loc env UniVarNotAllowed
| PTvar s ->
if tp.tp_tvar then
try tvar (UE.getnamed ue s.pl_desc)
with _ -> tyerror s.pl_loc env (UnboundTypeParameter s.pl_desc)
else
tyerror s.pl_loc env TypeVarNotAllowed;
| PTtuple tys ->
ttuple (transtys tp env ue tys)
| PTnamed { pl_desc = name } -> begin
match EcEnv.Ty.lookup_opt name env with
| None ->
tyerror ty.pl_loc env (UnknownTypeName name)
| Some (p, tydecl) ->
if tydecl.tyd_params <> [] then begin
let nargs = List.length tydecl.tyd_params in
tyerror ty.pl_loc env (InvalidTypeAppl (name, nargs, 0))
end;
tconstr p []
end
| PTfun(ty1,ty2) ->
tfun (transty tp env ue ty1) (transty tp env ue ty2)
| PTapp ({ pl_desc = name }, tyargs) ->
begin match EcEnv.Ty.lookup_opt name env with
| None ->
tyerror ty.pl_loc env (UnknownTypeName name)
| Some (p, tydecl) ->
let nargs = List.length tyargs in
let expected = List.length tydecl.tyd_params in
if nargs <> expected then
tyerror ty.pl_loc env (InvalidTypeAppl (name, expected, nargs));
let tyargs = transtys tp env ue tyargs in
tconstr p tyargs
end
| PTglob gp ->
let m,_ = trans_msymbol env gp in
tglob m
| PTmemof x ->
let s = x.pl_desc in
let s = String.sub s 1 (String.length s - 1) in
match EcEnv.Var.lookup_local_opt s env with
| None -> tyerror x.pl_loc env (UnknownVarOrOp(([],s), []))
| Some(_, ty) ->
let mt =
try EcUnify.destr_tmem env ty
with DestrError _ ->
try EcUnify.destr_tdmem env ty with DestrError _ ->
tyerror x.pl_loc env (TmemTyNotFound(s, ty)) in
tmem mt
and transtys tp (env : EcEnv.env) ue tys =
List.map (transty tp env ue) tys
let transty_for_decl env ty =
let ue = UE.create (Some []) in
transty tp_nothing env ue ty
(* -------------------------------------------------------------------- *)
let transpattern1 env ue (p : EcParsetree.plpattern) =
match p.pl_desc with
| LPSymbol { pl_desc = x } ->
let ty = UE.fresh ue in
let x = EcIdent.create x in
(LSymbol (x,ty), ty)
| LPTuple xs ->
let xs = unlocs xs in
if not (List.is_unique xs) then
tyerror p.pl_loc env NonLinearPattern
else
let xs = List.map ident_of_osymbol xs in
let subtys = List.map (fun _ -> UE.fresh ue) xs in
(LTuple (List.combine xs subtys), ttuple subtys)
| LPRecord fields ->
let xs = List.map (unloc |- snd) fields in
if not (List.is_unique xs) then
tyerror p.pl_loc env NonLinearPattern;
let fields =
let for1 (name, v) =
let filter = fun op -> EcDecl.is_proj op in
let fds = EcUnify.select_op ~filter None env (unloc name) ue [] in
match List.ohead fds with
| None ->
let exn = UnknownRecFieldName (unloc name) in
tyerror name.pl_loc env exn
| Some ((fp, _tvi), opty, subue, _) ->
let field = oget (EcEnv.Op.by_path_opt fp env) in
let (recp, fieldidx, _) = EcDecl.operator_as_proj field in
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
((recp, fieldidx), opty, (name, v))
in
List.map for1 fields in
let recp = Sp.of_list (List.map (fst |- proj3_1) fields) in
let recp =
match Sp.elements recp with
| [] -> assert false
| [recp] -> recp
| p1::p2::_ -> tyerror p.pl_loc env (MixingRecFields (p1, p2))
in
let recty = oget (EcEnv.Ty.by_path_opt recp env) in
let rec_ = snd (EcDecl.tydecl_as_record recty) in
let reccty = tconstr recp (List.map (tvar |- fst) recty.tyd_params) in
let reccty, rectvi = EcUnify.UniEnv.openty ue recty.tyd_params None reccty in
let fields =
List.fold_left
(fun map (((_, idx), _, _) as field) ->
if Mint.mem idx map then
let name = fst (List.nth rec_ idx) in
let exn = DuplicatedRecFieldName name in
tyerror p.pl_loc env exn
else
Mint.add idx field map)
Mint.empty fields in
let fields =
List.init (List.length rec_)
(fun i ->
match Mint.find_opt i fields with
| None ->
let pty = EcUnify.UniEnv.fresh ue in
let fty = snd (List.nth rec_ i) in
let fty, _ =
EcUnify.UniEnv.openty ue recty.tyd_params
(Some (EcUnify.TVIunamed rectvi)) fty
in
(try EcUnify.unify env ue pty fty
with EcUnify.UnificationFailure _ -> assert false);
(None, pty)
| Some (_, opty, (_, v)) ->
let pty = EcUnify.UniEnv.fresh ue in
(try EcUnify.unify env ue (tfun reccty pty) opty
with EcUnify.UnificationFailure _ -> assert false);
(Some (EcIdent.create (unloc v)), pty))
in
(LRecord (recp, fields), reccty)
let transpattern env ue (p : EcParsetree.plpattern) =
match transpattern1 env ue p with
| (LSymbol (x, ty)) as p, _ ->
(EcEnv.Var.bind_local x ty env, p, ty)
| LTuple xs as p, ty ->
(EcEnv.Var.bind_locals xs env, p, ty)
| LRecord (_, xs) as p, ty ->
let xs = List.pmap (function
| (None, _) -> None
| (Some x, ty) -> Some (x, ty)) xs
in
(EcEnv.Var.bind_locals xs env, p, ty)
(* -------------------------------------------------------------------- *)
let transtvi env ue tvi =
match tvi.pl_desc with
| TVIunamed lt ->
EcUnify.TVIunamed (List.map (transty tp_relax env ue) lt)
| TVInamed lst ->
let add locals (s, t) =
if List.exists (fun (s', _) -> unloc s = unloc s') locals then
tyerror tvi.pl_loc env DuplicatedTyVar;
(s, transty tp_relax env ue t) :: locals
in
let lst = List.fold_left add [] lst in
EcUnify.TVInamed (List.rev_map (fun (s,t) -> unloc s, t) lst)
let rec destr_tfun env ue tf =
match tf.ty_node with
| Tunivar id -> begin
let tf' = UE.repr ue tf in
match tf == tf' with
| false -> destr_tfun env ue tf'
| true ->
let ty1 = UE.fresh ue in
let ty2 = UE.fresh ue in
EcUnify.unify env ue (tuni id) (tfun ty1 ty2);
Some (ty1, ty2)
end
| Tfun (ty1, ty2) -> Some (ty1, ty2)
| Tconstr (p, tys) when EcEnv.Ty.defined p env ->
destr_tfun env ue (EcEnv.Ty.unfold p tys env)
| _ -> None
let rec ty_fun_app loc env ue tf targs =
match targs with
| [] -> tf
| t1 :: targs -> begin
match destr_tfun env ue tf with
| None -> tyerror loc env NotAFunction
| Some (dom, codom) ->
unify_or_fail env ue t1.pl_loc ~expct:dom t1.pl_desc;
let loc = EcLocation.merge loc t1.pl_loc in
ty_fun_app loc env ue codom targs
end
(* -------------------------------------------------------------------- *)
let trans_binding env ue bd =
let trans_bd1 env (xs, pty) =
let ty = transty tp_relax env ue pty in
let xs = List.map (fun x -> ident_of_osymbol (unloc x), ty) xs in
let env = EcEnv.Var.bind_locals xs env in
env, xs in
let env, bd = List.map_fold trans_bd1 env bd in
let bd = List.flatten bd in
env, bd
(* -------------------------------------------------------------------- *)
let trans_record env ue subtt (loc, fields) =
let fields =
let for1 rf =
let filter = fun op -> EcDecl.is_proj op in
let tvi = rf.rf_tvi |> omap (transtvi env ue) in
let fds = EcUnify.select_op ~filter tvi env (unloc rf.rf_name) ue [] in
match List.ohead fds with
| None ->
let exn = UnknownRecFieldName (unloc rf.rf_name) in
tyerror rf.rf_name.pl_loc env exn
| Some ((fp, _tvi), opty, subue, _) ->
let field = oget (EcEnv.Op.by_path_opt fp env) in
let (recp, fieldidx, _) = EcDecl.operator_as_proj field in
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
((recp, fieldidx), opty, rf)
in
List.map for1 fields in
let recp = Sp.of_list (List.map (fst |- proj3_1) fields) in
let recp =
match Sp.elements recp with
| [] -> assert false
| [recp] -> recp
| p1::p2::_ -> tyerror loc env (MixingRecFields (p1, p2))
in
let recty = oget (EcEnv.Ty.by_path_opt recp env) in
let rec_ = snd (EcDecl.tydecl_as_record recty) in
let reccty = tconstr recp (List.map (tvar |- fst) recty.tyd_params) in
let reccty, rtvi = EcUnify.UniEnv.openty ue recty.tyd_params None reccty in
let fields =
List.fold_left
(fun map (((_, idx), _, _) as field) ->
if Mint.mem idx map then
let name = fst (List.nth rec_ idx) in
let exn = DuplicatedRecFieldName name in
tyerror loc env exn
else
Mint.add idx field map)
Mint.empty fields in
List.iteri
(fun i (name, _) ->
if not (Mint.mem i fields) then
let exn = MissingRecField name in
tyerror loc env exn)
rec_;
let fields = Mint.values fields in (* sorted by field idx *)
let fields =
let for1 (_, opty, rf) =
let pty = EcUnify.UniEnv.fresh ue in
(try EcUnify.unify env ue (tfun reccty pty) opty
with EcUnify.UnificationFailure _ -> assert false);
let e, ety = subtt rf.rf_value in
unify_or_fail env ue rf.rf_value.pl_loc ~expct:pty ety;
(e, ety)
in
List.map for1 fields
in
let ctor =
EcPath.pqoname
(EcPath.prefix recp)
(Printf.sprintf "mk_%s" (EcPath.basename recp))
in
(ctor, fields, (rtvi, reccty))
(*-------------------------------------------------------------------- *)
let expr_of_opselect
(env, ue) loc ((sel, ty, subue, _) : OpSelect.gopsel) args
=
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
let esig = List.map (lmap snd) args in
let args = List.map (fst |- unloc) args in
let codom = ty_fun_app loc env ue ty esig in
let op, args =
match sel with
| `Nt (lazy (bds, body)) ->
let nbds = List.length bds in
let nargs = List.length args in
let ((tosub, args), elam) =
if nbds <= nargs then
(List.split_at nbds args, [])
else
let xs = snd (List.split_at nargs bds) in
let xs = List.map (fst_map EcIdent.fresh) xs in
((args @ List.map (curry e_local) xs, []), xs) in
let lcmap = List.map2 (fun (x, _) y -> (x, y)) bds tosub in
let subst = { EcTypes.e_subst_id with es_freshen = true; } in
let subst = { subst with es_loc = Mid.of_list lcmap; } in
let body = EcTypes.e_subst subst body in
(e_lam elam body, args)
| (`Op _ | `Lc _ | `Pv _) as sel -> let op = match sel with
| `Op (p, tys) -> e_op p tys ty
| `Lc id -> e_local id ty
| `Pv (_me, `Var pv) -> e_var pv ty
| `Pv (_me, `Proj (pv, _ , (0, 1))) -> e_var pv ty
| `Pv (_me, `Proj (pv, ty', (i, _))) -> e_proj (e_var pv ty') i ty
in (op, args)
in (e_app op args codom, codom)
(* -------------------------------------------------------------------- *)
let transexp (env : EcEnv.env) mode ue e =
let rec transexp_r (osc : EcPath.path option) (env : EcEnv.env) (e : pexpr) =
let loc = e.pl_loc in
let transexp = transexp_r osc in
match e.pl_desc with
| PEint i -> (e_int i, tint)
| PEident ({ pl_desc = name }, tvi) ->
let tvi = tvi |> omap (transtvi env ue) in
let ops = select_exp_op env mode osc name ue tvi [] in
begin match ops with
| [] -> tyerror loc env (UnknownVarOrOp (name, []))
| [sel] ->
expr_of_opselect (env, ue) e.pl_loc sel []
| _ ->
let matches = List.map (fun (_, _, subue, m) -> (m, subue)) ops in
tyerror loc env (MultipleOpMatch (name, [], matches))
end
| PEscope (popsc, e) ->
let opsc = lookup_scope env popsc in
transexp_r (Some opsc) env e
| PEapp ({ pl_desc = PEident({ pl_desc = name; pl_loc = loc }, tvi)}, pes) ->
let tvi = tvi |> omap (transtvi env ue) in
let es = List.map (transexp env) pes in
let esig = snd (List.split es) in
let ops = select_exp_op env mode osc name ue tvi esig in
begin match ops with
| [] ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
tyerror loc env (UnknownVarOrOp (name, esig))
| [sel] ->
let es = List.map2 (fun e l -> mk_loc l.pl_loc e) es pes in
expr_of_opselect (env, ue) loc sel es
| _ ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
let matches = List.map (fun (_, _, subue, m) -> (m, subue)) ops in
tyerror loc env (MultipleOpMatch (name, esig, matches))
end
| PEapp (pe, pes) ->
let e, ty = transexp env pe in
let es = List.map (transexp env) pes in
let esig = List.map2 (fun (_, ty) l -> mk_loc l.pl_loc ty) es pes in
let codom = ty_fun_app pe.pl_loc env ue ty esig in
(e_app e (List.map fst es) codom, codom)
| PElet (p, (pe1, paty), pe2) ->
let (penv, pt, pty) = transpattern env ue p in
let aty = paty |> omap (transty tp_relax env ue) in
let e1, ty1 = transexp env pe1 in
unify_or_fail env ue pe1.pl_loc ~expct:pty ty1;
aty |> oiter (fun aty -> unify_or_fail env ue pe1.pl_loc ~expct:aty ty1);
let e2, ty2 = transexp penv pe2 in
(e_let pt e1 e2, ty2)
| PEtuple es -> begin
let tes = List.map (transexp env) es in
match tes with
| [] -> (e_tt, EcTypes.tunit)
| [e, ty] -> (e, ty)
| _ ->
let es, tys = List.split tes in
(e_tuple es, ttuple tys)
end
| PEif (pc, pe1, pe2) ->
let c, tyc = transexp env pc in
let e1, ty1 = transexp env pe1 in
let e2, ty2 = transexp env pe2 in
unify_or_fail env ue pc .pl_loc ~expct:tbool tyc;
unify_or_fail env ue pe2.pl_loc ~expct:ty1 ty2;
(e_if c e1 e2, ty1)
| PEforall (xs, pe) ->
let env, xs = trans_binding env ue xs in
let e, ety = transexp env pe in
unify_or_fail env ue pe.pl_loc ~expct:tbool ety;
(e_forall xs e, tbool)
| PEexists (xs, pe) ->
let env, xs = trans_binding env ue xs in
let e, ety = transexp env pe in
unify_or_fail env ue pe.pl_loc ~expct:tbool ety;
(e_exists xs e, tbool)
| PElambda (bd, pe) ->
let env, xs = trans_binding env ue bd in
let e, ty = transexp env pe in
let ty = toarrow (List.map snd xs) ty in
(e_lam xs e, ty)
| PErecord fields ->
let (ctor, fields, (rtvi, reccty)) =
trans_record env ue (transexp env) (loc, fields) in
let ctor = e_op ctor rtvi (toarrow (List.map snd fields) reccty) in
let ctor = e_app ctor (List.map fst fields) reccty in
ctor, reccty
| PEproj (sube, x) -> begin
let sube, ety = transexp env sube in
match select_proj env osc (unloc x) ue None ety with
| [] ->
let ty = Tuni.offun (EcUnify.UniEnv.assubst ue) ety in
let me = EcFol.mhr in
let mp =
match ty.ty_node with
| Tglob mp -> mp
| _ -> tyerror x.pl_loc env (UnknownProj (unloc x)) in
let f = NormMp.norm_glob env (f_local me (tmem None)) mp in
let lf =
match f.f_node with
| Ftuple l -> l
| _ -> tyerror x.pl_loc env (UnknownProj (unloc x)) in
let vx,ty =
match EcEnv.Var.lookup_progvar_opt ~side:me (unloc x) env with
| None -> tyerror x.pl_loc env (UnknownVarOrOp (unloc x, []))
| Some (x1, ty) ->
match x1 with
| `Var x -> NormMp.norm_pvar env x, ty
| _ -> tyerror x.pl_loc env (UnknownVarOrOp (unloc x, [])) in
let find f1 =
match f1.f_node with
| Fpvar (x1, _) -> EcTypes.pv_equal vx (NormMp.norm_pvar env x1)
| _ -> false in
let i =
match List.oindex find lf with
| None -> tyerror x.pl_loc env (UnknownProj (unloc x))
| Some i -> i in
e_proj sube i ty, ty
| _::_::_ ->
tyerror x.pl_loc env (AmbiguousProj (unloc x))
| [(op, tvi), pty, subue] ->
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
let rty = EcUnify.UniEnv.fresh ue in
(try EcUnify.unify env ue (tfun ety rty) pty
with EcUnify.UnificationFailure _ -> assert false);
(e_app (e_op op tvi pty) [sube] rty, rty)
end
| PEproji (sube, i) -> begin
let sube', ety = transexp env sube in
let ty = Tuni.offun (EcUnify.UniEnv.assubst ue) ety in
match (EcEnv.Ty.hnorm ty env).ty_node with
| Ttuple l when i < List.length l ->
let ty = List.nth l i in
e_proj sube' i ty, ty
| _ -> tyerror sube.pl_loc env (AmbiguousProji(i,ty))
end
in
transexp_r None env e
let transexpcast (env : EcEnv.env) mode ue t e =
let (e', t') = transexp env mode ue e in
unify_or_fail env ue e.pl_loc ~expct:t t'; e'
let transexpcast_opt (env : EcEnv.env) mode ue oty e =
match oty with
| None -> fst (transexp env mode ue e)
| Some t -> transexpcast env mode ue t e
(* -------------------------------------------------------------------- *)
exception DuplicatedSigItemName
exception DuplicatedArgumentsName of pfunction_decl
(* -------------------------------------------------------------------- *)
let name_of_sigitem = function
| `FunctionDecl f -> f.pfd_name
(* -------------------------------------------------------------------- *)
let lookup_module_type (env : EcEnv.env) (name : pqsymbol) =
match EcEnv.ModTy.lookup_opt (unloc name) env with
| None -> tyerror name.pl_loc env (UnknownTyModName (unloc name))
| Some x -> x
let lookup_fun env name =
try
EcEnv.Fun.lookup name.pl_desc env
with EcEnv.LookupFailure _ ->
tyerror name.pl_loc env (UnknownFunName name.pl_desc)
(* -------------------------------------------------------------------- *)
let transmodtype (env : EcEnv.env) (modty : pmodule_type) =
let (p, sig_) = lookup_module_type env modty in
let modty = { (* eta-normal form *)
mt_params = sig_.mis_params;
mt_name = p;
mt_args = List.map (EcPath.mident -| fst) sig_.mis_params;
} in
(modty, sig_)
let transcall transexp env ue loc fsig args =
let targ = fsig.fs_arg in
let process_args tys =
if List.length args <> List.length tys then
tyerror loc env (InvalidFunAppl FAE_WrongArgCount);
List.map2
(fun a ty ->
let loc = a.pl_loc in
let a, aty = transexp a in
unify_or_fail env ue loc ~expct:ty aty; a) args tys
in
let args =
match List.length args with
| 0 ->
if not (EcReduction.EqTest.for_type env targ tunit) then
tyerror loc env (InvalidFunAppl FAE_WrongArgCount);
[]
| _ when EcReduction.EqTest.for_type env targ tunit ->
tyerror loc env (InvalidFunAppl FAE_WrongArgCount);
| 1 -> process_args [targ]
| _ ->
let lty =
match (EcEnv.Ty.hnorm targ env).ty_node with
| Ttuple lty -> lty
| _ -> [targ] in
process_args lty
in
(args, fsig.fs_ret)
(* -------------------------------------------------------------------- *)
let trans_gamepath (env : EcEnv.env) gp =
let loc = gp.pl_loc in
let modsymb = List.map (unloc -| fst) (fst (unloc gp))
and funsymb = unloc (snd (unloc gp)) in
let xp =
match EcEnv.Fun.sp_lookup_opt (modsymb, funsymb) env with
| None -> tyerror gp.pl_loc env (UnknownFunName (modsymb, funsymb))
| Some (xp,_) -> xp
in
match modsymb with
| [] -> xp
| _ ->
let (mpath, _sig) = trans_msymbol env (mk_loc loc (fst (unloc gp))) in
if _sig.mis_params <> [] then
tyerror gp.pl_loc env (UnknownFunName (modsymb, funsymb));
EcPath.xpath_fun mpath funsymb
(* -------------------------------------------------------------------- *)
let rec transmodsig (env : EcEnv.env) (name : symbol) (modty : pmodule_sig) =
let Pmty_struct modty = modty in
let margs =
List.map (fun (x, i) ->
(EcIdent.create (unloc x), fst (transmodtype env i)))
modty.pmsig_params
in
let sa =
List.fold_left (fun sa (x,_) -> Sm.add (EcPath.mident x) sa) Sm.empty margs
in
let env = EcEnv.Mod.enter name margs env in
let body = transmodsig_body env sa modty.pmsig_body in
{ mis_params = margs;
mis_body = body; }
(* -------------------------------------------------------------------- *)
and transmodsig_body (env : EcEnv.env) (sa : Sm.t)
(is : pmodule_sig_struct_body) =
let transsig1 (`FunctionDecl f) =
let name = f.pfd_name in
let tyarg, tyargs =
match f.pfd_tyargs with
| Fparams_exp l ->
let tyargs =
List.map (* FIXME: continuation *)
(fun (x, ty) -> { v_name = x.pl_desc;
v_type = transty_for_decl env ty}) l in
if not (List.is_unique (List.map fst l)) then
raise (DuplicatedArgumentsName f);
let tyarg = ttuple (List.map (fun vd -> vd.v_type) tyargs) in
tyarg, Some tyargs
| Fparams_imp ty ->
let tyarg = transty_for_decl env ty in
tyarg, None in
let resty = transty_for_decl env f.pfd_tyresult in
let (uin, calls) =
let calls =
match snd f.pfd_uses with
| None ->
let do_one mp calls =
let sig_ = (EcEnv.Mod.by_mpath mp env).me_sig in
if sig_.mis_params <> [] then calls
else
let fs = List.map (fun (Tys_function (fsig, _)) ->
EcPath.xpath_fun mp fsig.fs_name) sig_.mis_body
in
fs@calls
in
Sm.fold do_one sa []
| Some pfd_uses ->
List.map (fun name ->
let f = fst (lookup_fun env name) in
let p = f.EcPath.x_top in
if not (Sm.mem p sa) then
tyerror name.pl_loc env (FunNotInModParam name.pl_desc);
f)
pfd_uses
in
(fst f.pfd_uses, calls)
in
let sig_ = { fs_name = name.pl_desc;
fs_arg = tyarg;
fs_anames = tyargs;
fs_ret = resty; }
and oi = { oi_calls = calls; oi_in = uin; } in
Tys_function (sig_, oi)
in
let items = List.map transsig1 is in
let names = List.map name_of_sigitem is in
if not (List.is_unique names) then
raise DuplicatedSigItemName
else
items
(* -------------------------------------------------------------------- *)
let rec transmod ~attop (env : EcEnv.env) (x : symbol) (me : pmodule_expr) =
match me.pl_desc with
| Pm_ident (params,m) ->
let stparams, env = transmod_params env x params in
let (mp, sig_) = trans_msymbol env {pl_desc = m; pl_loc = me.pl_loc} in
let extraparams = sig_.mis_params in
let allparams = stparams @ extraparams in
if allparams <> [] && not attop then
tyerror me.pl_loc env
(InvalidModAppl (MAE_WrongArgCount(0,List.length allparams)));
let me = EcEnv.Mod.by_mpath mp env in
let arity = List.length stparams in
{ me with
me_name = x;
me_body = ME_Alias (arity,mp);
me_sig = { sig_ with mis_params = allparams };
}
| Pm_struct st -> transstruct ~attop env x (mk_loc me.pl_loc st)
(* -------------------------------------------------------------------- *)
and transmod_params env x params =
(* Check parameters types *) (* FIXME: dup names *)
let stparams =
List.map (* FIXME: exn *)
(fun (a, aty) ->
(EcIdent.create a.pl_desc, fst (transmodtype env aty)))
params
in
(* Check structure items, extending environment initially with
* structure arguments, and then with previously checked items. *)
let env = EcEnv.Mod.enter x stparams env in
stparams, env
and transstruct ~attop (env : EcEnv.env) (x : symbol) (st : pstructure located) =
let { pl_loc = loc; pl_desc = st; } = st in
if not attop && st.ps_params <> [] then
tyerror loc env (InvalidModType MTE_InternalFunctor);
let stparams, env0 = transmod_params env x st.ps_params in
let (envi, items) =
let tydecl1 (x, obj) =
match obj with
| MI_Module m -> (x, `Module m)
| MI_Variable v -> (x, `Variable (EcTypes.PVglob, v.v_type))
| MI_Function f -> (x, `Function f)
in
List.fold_left
(fun (env, acc) item ->
let newitems = transstruct1 env item in
let env = EcEnv.bindall (List.map tydecl1 newitems) env in
(env, acc @ newitems))
(env0, []) st.ps_body
in
let items = List.map snd items in
(* Generate structure signature *)
let tymod =
let mparams =
List.fold_left (fun mparams (id,_) ->
Sm.add (EcPath.mident id) mparams) Sm.empty stparams in
let tymod1 = function
| MI_Module _ -> None
| MI_Variable _ -> None
| MI_Function f ->
let rec f_call c f =
let f = EcEnv.NormMp.norm_xfun envi f in
if EcPath.Sx.mem f c then c
else
let c = EcPath.Sx.add f c in
match (EcEnv.Fun.by_xpath f envi).f_def with
| FBalias _ -> assert false
| FBdef def -> List.fold_left f_call c def.f_uses.us_calls
| FBabs oi -> List.fold_left f_call c oi.oi_calls in
let all_calls =
match f.f_def with
| FBalias f -> f_call EcPath.Sx.empty f
| FBdef def ->
List.fold_left f_call EcPath.Sx.empty def.f_uses.us_calls
| FBabs _ -> assert false in
let filter f =
let ftop = EcPath.m_functor f.EcPath.x_top in
Sm.mem ftop mparams in
let calls = List.filter filter (EcPath.Sx.elements all_calls) in
Some (Tys_function (f.f_sig, { oi_calls = calls; oi_in = true; }))
in
let sigitems = List.pmap tymod1 items in
{ mis_params = stparams;
mis_body = sigitems; };
in
(* Check that generated signature is structurally included in
* associated type mode. *)
let check1 { pl_desc = (aty, oatyp); pl_loc = loc } =
let (aty, _asig) = transmodtype env aty in
if oatyp <> [] then
begin
let cmp (x1, _) x2 = (EcIdent.name x1 = unloc x2) in
if not (List.all2 cmp stparams oatyp) then
tyerror loc env
(InvalidModType MTE_FunSigDoesNotRepeatArgNames);
(* Now we check the signature *)
try check_sig_mt_cnv env tymod aty
with TymodCnvFailure err -> tyerror loc env (TypeModMismatch err)
end
else (* In that case we check the fully applied signature *)
let sig_ =
{ mis_params = [];
mis_body = List.map
(fun (Tys_function (s, oi)) ->
Tys_function (s, { oi_calls = []; oi_in = oi.oi_in }))
tymod.mis_body } in
try check_sig_mt_cnv env0 sig_ aty
with TymodCnvFailure err -> tyerror loc env0 (TypeModMismatch err)
in
List.iter check1 st.ps_signature;
(* Construct structure representation *)
let me =
{ me_name = x;
me_body = ME_Structure { ms_body = items; };
me_comps = items;
me_sig = tymod; }
in
me
(* -------------------------------------------------------------------- *)
and transstruct1 (env : EcEnv.env) (st : pstructure_item located) =
match unloc st with
| Pst_mod ({ pl_desc = m }, me) ->
let me = transmod ~attop:false env m me in
[(m, MI_Module me)]
| Pst_var (xs, ty) ->
let ty = transty_for_decl env ty in
List.map
(fun { pl_desc = x } ->
(x, MI_Variable { v_name = x; v_type = ty; }))
xs
| Pst_fun (decl, body) -> begin
let ue = UE.create (Some []) in
let env = EcEnv.Fun.enter decl.pfd_name.pl_desc env in
let symbols = ref Sstr.empty
and env = ref env in
(* Type-check function parameters / check for dups *)
let dtyargs =
match decl.pfd_tyargs with
| Fparams_imp _ -> assert false
| Fparams_exp l -> l in
let params =
let params = ref [] in
let add_param (x, pty) =
let ty = transty tp_uni !env ue pty in
let pr = (unloc x, `Variable (PVloc, ty)) in
fundef_add_symbol !env symbols x;
params := ({ v_name = unloc x; v_type = ty }, pty.pl_loc) :: !params;
env := EcEnv.bindall [pr] !env
in
List.iter add_param dtyargs;
List.rev !params
in
(* Type-check body *)
let retty = transty tp_uni !env ue decl.pfd_tyresult in
let (env, stmt, result, prelude, locals) =
transbody ue symbols !env retty (mk_loc st.pl_loc body)
in
(* Close all types *)
let su = Tuni.offun (UE.assubst ue) in
let retty = fundef_check_type su env None (retty, decl.pfd_tyresult.pl_loc) in
let params = List.map (fundef_check_decl su env) params in
let locals = List.map (fundef_check_decl su env) locals in
let prelude = List.map (fundef_check_iasgn su env) prelude in
if not (UE.closed ue) then
tyerror st.pl_loc env (OnlyMonoTypeAllowed None);
let clsubst = { EcTypes.e_subst_id with es_ty = su } in
let stmt = s_subst clsubst stmt
and result = result |> omap (e_subst clsubst) in
let stmt = EcModules.stmt (List.flatten prelude @ stmt.s_node) in
(* Computes reads/writes/calls *)
let uses = result |> ofold ((^~) se_inuse) (s_inuse stmt) in
(* Compose all results *)
let fun_ =
{ f_name = decl.pfd_name.pl_desc;
f_sig = {
fs_name = decl.pfd_name.pl_desc;
fs_arg = ttuple (List.map (fun vd -> vd.v_type) params);
fs_anames = Some params;
fs_ret = retty;
};
f_def = FBdef {
f_locals = locals;
f_body = stmt;
f_ret = result;
f_uses = uses;
};
}
in
[(decl.pfd_name.pl_desc, MI_Function fun_)]
end
| Pst_alias ({pl_desc = name},f) ->
let f = trans_gamepath env f in
let sig_ = (EcEnv.Fun.by_xpath f env).f_sig in
let fun_ = {
f_name = name;
f_sig = { sig_ with fs_name = name };
f_def = FBalias f;
} in
[(name, MI_Function fun_)]
(* -------------------------------------------------------------------- *)
and transbody ue symbols (env : EcEnv.env) retty pbody =
let { pl_loc = loc; pl_desc = pbody; } = pbody in
let env = ref env
and prelude = ref []
and locals = ref [] in
let mpath = oget (EcEnv.xroot !env) in
(* Type-check local variables / check for dups *)
let add_local local =
List.iter (fundef_add_symbol !env symbols) (snd (unloc local.pfl_names));
let xs = snd (unloc local.pfl_names) in
let mode = fst (unloc local.pfl_names) in
let init = local.pfl_init |> omap (fst -| transexp !env `InProc ue) in
let ty = local.pfl_type |> omap (transty tp_uni !env ue) in
let ty =
match ty, init with
| None , None -> None
| Some ty, None -> Some ty
| None , Some e -> Some e.e_ty
| Some ty, Some e -> begin
let loc = (oget local.pfl_init).pl_loc in
unify_or_fail !env ue loc ~expct:ty e.e_ty; Some ty
end
in
let xsvars = List.map (fun _ -> UE.fresh ue) xs in
begin
ty |> oiter (fun ty ->
match mode with
| `Single -> List.iter (fun a -> EcUnify.unify !env ue a ty) xsvars
| `Tuple -> unify_or_fail !env ue local.pfl_names.pl_loc ~expct:ty (ttuple xsvars))
end;
env := begin
let topr = fun x xty -> (unloc x, `Variable (PVloc, xty)) in
EcEnv.bindall (List.map2 topr xs xsvars) !env
end;
let mylocals =
List.map2
(fun { pl_desc = x; pl_loc = loc; } xty ->
({ v_name = x; v_type = xty }, pv_loc mpath x, xty, loc))
xs xsvars
in
locals :=
List.rev_append
(List.map (fun (v, _, _, pl) -> (v, pl)) mylocals)
!locals;
init |> oiter
(fun init ->
let iasgn = List.map (fun (_, v, xty, _) -> (v, xty)) mylocals in
prelude := ((mode, iasgn), init, _dummy) :: !prelude)
in
List.iter add_local pbody.pfb_locals;
let body = transstmt !env ue pbody.pfb_body in
let result =
match pbody.pfb_return with
| None ->
begin
try EcUnify.unify !env ue tunit retty
with EcUnify.UnificationFailure _ ->
tyerror loc !env NonUnitFunWithoutReturn
end;
None
| Some pe ->
let (e, ety) = transexp !env `InProc ue pe in
unify_or_fail !env ue pe.pl_loc ~expct:retty ety;
Some e
in
(!env, body, result, List.rev !prelude, List.rev !locals)
(* -------------------------------------------------------------------- *)
and fundef_add_symbol env symbols x = (* for locals dup check *)
if Sstr.mem x.pl_desc !symbols then
tyerror x.pl_loc env (DuplicatedLocal x.pl_desc);
symbols := Sstr.add x.pl_desc !symbols
and fundef_check_type subst_uni env os (ty, loc) =
let ty = subst_uni ty in
if not (EcUid.Suid.is_empty (Tuni.fv ty)) then
tyerror loc env (OnlyMonoTypeAllowed os);
if as_tmem env ty then
tyerror loc env (TmemNotAllowed ty);
ty
and fundef_check_decl subst_uni env (decl, loc) =
{ decl with
v_type =
fundef_check_type subst_uni env (Some decl.v_name) (decl.v_type, loc) }
and fundef_check_iasgn subst_uni env ((mode, pl), init, loc) =
let pl =
List.map
(fun (p, ty) ->
(p, fundef_check_type subst_uni env None (ty, loc)))
pl
in
let pl =
match mode with
| `Single -> List.map (fun xty -> LvVar xty) pl
| `Tuple -> [LvTuple pl]
in
let clsubst = { EcTypes.e_subst_id with es_ty = subst_uni } in
let init = e_subst clsubst init in
List.map (fun lv -> i_asgn (lv, init)) pl
(* -------------------------------------------------------------------- *)
and transstmt (env : EcEnv.env) ue (stmt : pstmt) : stmt =
EcModules.stmt (List.map (transinstr env ue) stmt)
(* -------------------------------------------------------------------- *)
and transinstr (env : EcEnv.env) ue (i : pinstr) =
let transcall name args =
let fpath = trans_gamepath env name in
let fsig = (EcEnv.Fun.by_xpath fpath env).f_sig in
let (args, ty) =
transcall (transexp env `InProc ue) env ue name.pl_loc fsig args
in
(fpath, args, ty)
in
match i.pl_desc with
| PSasgn (plvalue, prvalue) -> begin
match unloc prvalue with
| PEapp ( { pl_desc = PEident (f, None) },
[{ pl_desc = PEtuple es; pl_loc = les; }])
when EcEnv.Fun.lookup_opt (unloc f) env <> None
->
let fident { pl_loc = loc; pl_desc = (nm, x); } =
let nm = List.map (fun x -> (mk_loc loc x, None)) nm in
mk_loc loc (nm, mk_loc loc x)
in
let call = PScall (Some plvalue, fident f, mk_loc les es) in
transinstr env ue (mk_loc i.pl_loc call)
| _ ->
let lvalue, lty = translvalue ue env plvalue in
let rvalue, rty = transexp env `InProc ue prvalue in
unify_or_fail env ue prvalue.pl_loc ~expct:lty rty;
i_asgn (lvalue, rvalue)
end
| PSrnd (plvalue, prvalue) ->
let lvalue, lty = translvalue ue env plvalue in
let rvalue, rty = transexp env `InProc ue prvalue in
unify_or_fail env ue prvalue.pl_loc ~expct:(tdistr lty) rty;
i_rnd (lvalue, rvalue)
| PScall (None, name, args) ->
let (fpath, args, _rty) = transcall name (unloc args) in
i_call (None, fpath, args)
| PScall (Some lvalue, name, args) ->
let lvalue, lty = translvalue ue env lvalue in
let (fpath, args, rty) = transcall name (unloc args) in
unify_or_fail env ue name.pl_loc ~expct:lty rty;
i_call (Some lvalue, fpath, args)
| PSif ((pe, s), cs, sel) -> begin
let rec for1_i (pe, s) sel =
let e, ety = transexp env `InProc ue pe in
let s = transstmt env ue s in
unify_or_fail env ue pe.pl_loc ~expct:tbool ety;
i_if (e, s, sel)
and for1_s (pe, s) sel = stmt [for1_i (pe, s) sel] in
for1_i (pe, s)
(List.fold_right for1_s cs (transstmt env ue sel))
end
| PSwhile (pe, pbody) ->
let e, ety = transexp env `InProc ue pe in
let body = transstmt env ue pbody in
unify_or_fail env ue pe.pl_loc ~expct:tbool ety;
i_while (e, body)
| PSassert pe ->
let e, ety = transexp env `InProc ue pe in
unify_or_fail env ue pe.pl_loc ~expct:tbool ety;
i_assert e
(* -------------------------------------------------------------------- *)
and trans_pv env { pl_desc = x; pl_loc = loc } =
let side = EcEnv.Memory.get_active env in
let side = omap destr_local side in
match EcEnv.Var.lookup_progvar_opt ?side x env with
| None -> tyerror loc env (UnknownModVar x)
| Some(pv,xty) ->
match pv with
| `Var pv -> pv, xty
| `Proj _ -> assert false
and translvalue ue (env : EcEnv.env) lvalue =
match lvalue.pl_desc with
| PLvSymbol x ->
let pty = trans_pv env x in
LvVar pty, snd pty
| PLvTuple xs ->
let xs = List.map (trans_pv env) xs in
if not (List.is_unique ~eq:(EqTest.for_pv_norm env) (List.map fst xs)) then
tyerror lvalue.pl_loc env LvNonLinear;
let ty = ttuple (List.map snd xs) in
(LvTuple xs, ty)
| PLvMap (x, tvi, e) ->
let tvi = tvi |> omap (transtvi env ue) in
let codomty = UE.fresh ue in
let pv, xty = trans_pv env x in
let e, ety = transexp env `InProc ue e in
let name = ([], EcCoreLib.s_set) in
let esig = [xty; ety; codomty] in
let ops = select_exp_op env `InProc None name ue tvi esig in
match ops with
| [] ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
tyerror x.pl_loc env (UnknownVarOrOp (name, esig))
| [`Op (p, tys), opty, subue, _] ->
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
let esig = toarrow esig xty in
unify_or_fail env ue lvalue.pl_loc ~expct:esig opty;
(LvMap ((p, tys), pv, e, xty), codomty)
| [_] ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
tyerror x.pl_loc env (UnknownVarOrOp (name, esig))
| _ ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
let matches = List.map (fun (_, _, subue, m) -> (m, subue)) ops in
tyerror x.pl_loc env (MultipleOpMatch (name, esig, matches))
(* -------------------------------------------------------------------- *)
let transmem env m =
match EcEnv.Memory.lookup (unloc m) env with
| None ->
tyerror m.pl_loc env (UnknownMemName (unloc m))
| Some me ->
(* if (EcMemory.memtype me) <> None then
tyerror m.pl_loc env (InvalidMem (unloc m, MAE_IsConcrete)); *)
(fst me)
(* -------------------------------------------------------------------- *)
let trans_topmsymbol env gp =
(* FIXME *)
let (mp,_) = trans_msymbol env gp in
let top = EcPath.m_functor mp in
let mp = EcPath.m_apply top mp.EcPath.m_args in
mp
(* -------------------------------------------------------------------- *)
module PFS : sig
type pfstate
val create : unit -> pfstate
val set_memused : pfstate -> unit
val get_memused : pfstate -> bool
val new_memused : ('a -> 'b) -> pfstate -> 'a -> bool * 'b
end = struct
type pfstate = { mutable pfa_memused : bool; }
let create () = { pfa_memused = true; }
let set_memused state =
state.pfa_memused <- true
let get_memused state =
state.pfa_memused
let new_memused f state x =
let old = state.pfa_memused in
let aout = (state.pfa_memused <- false; f x) in
let new_ = state.pfa_memused in
state.pfa_memused <- old; (new_, aout)
end
(* -------------------------------------------------------------------- *)
let form_of_opselect
(env, ue) loc ((sel, ty, subue, _) : OpSelect.gopsel) args
=
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
let esig = List.map (lmap f_ty) args in
let args = List.map unloc args in
let codom = ty_fun_app loc env ue ty esig in
let op, args =
match sel with
| `Nt (lazy (bds, body)) ->
let nbds = List.length bds in
let nargs = List.length args in
let ((tosub, args), flam) =
if nbds <= nargs then
(List.split_at nbds args, [])
else
let xs = snd (List.split_at nargs bds) in
let xs = List.map (fst_map EcIdent.fresh) xs in
((args @ List.map (curry f_local) xs, []), xs) in
let flam = List.map (snd_map gtty) flam in
let me = EcEnv.Memory.get_active env in
let body = form_of_expr (omap destr_mem me) body in
let lcmap = List.map2 (fun (x, _) y -> (x, y)) bds tosub in
let subst = Fsubst.f_subst_init ~freshen:true () in
let subst =
List.fold_left (fun s -> curry (Fsubst.f_bind_local s)) subst lcmap
in (f_lambda flam (Fsubst.f_subst subst body), args)
| (`Op _ | `Lc _ | `Pv _) as sel -> let op = match sel with
| `Op (p, tys) -> f_op p tys ty
| `Lc id -> f_local id ty
| `Pv (me, `Var pv) -> f_pvar pv ty (oget me)
| `Pv (me, `Proj (pv, _ , (0, 1))) -> f_pvar pv ty (oget me)
| `Pv (me, `Proj (pv, ty', (i, _))) -> f_proj (f_pvar pv ty' (oget me)) i ty
in (op, args)
in f_app op args codom
(* -------------------------------------------------------------------- *)
let trans_gbinding env ue decl =
let trans1 env (xs, pgty) =
match pgty with
| PGTY_Type ty ->
let ty = transty tp_relax env ue ty in
let xs = List.map (fun x -> ident_of_osymbol (unloc x), ty) xs in
let env = EcEnv.Var.bind_locals xs env in
let xs = List.map (fun (x,ty) -> x,GTty ty) xs in
(env, xs)
| PGTY_ModTy (mi, restr) ->
let mi = fst (transmodtype env mi) in
let restr = Sm.of_list (List.map (trans_topmsymbol env) restr) in
let restr = Sx.empty, restr in
let ty = GTmodty (mi, restr) in
let add1 env x =
let x = ident_of_osymbol (unloc x) in
let env = EcEnv.Mod.bind_local x mi restr env in
(env, (x, ty))
in List.map_fold add1 env xs
| PGTY_Mem ->
let add1 env x =
let x = ident_of_osymbol (unloc x) in
let env = EcEnv.Memory.push (EcMemory.abstract x) env in
(env, (x, gtmem None))
in List.map_fold add1 env xs
in snd_map List.flatten (List.map_fold trans1 env decl)
(* -------------------------------------------------------------------- *)
let trans_form_or_pattern env (ps, ue) pf tt =
let state = PFS.create () in
let rec transf_r opsc env f =
let transf = transf_r opsc in
match f.pl_desc with
| PFhole -> begin
match ps with
| None -> tyerror f.pl_loc env PatternNotAllowed
| Some ps ->
let x = EcIdent.create (Printf.sprintf "?%d" (EcUid.unique ())) in
let ty = UE.fresh ue in
ps := Mid.add x ty !ps; f_local x ty
end
| PFscope (popsc, f) ->
let opsc = lookup_scope env popsc in
transf_r (Some opsc) env f
| PFglob gp ->
let mp = fst (trans_msymbol env gp) in
let me =
match EcEnv.Memory.current env with
| None -> tyerror f.pl_loc env NoActiveMemory
| Some me -> me
in PFS.set_memused state; f_glob mp me
| PFint n ->
f_int n
| PFtuple args -> begin
let args = List.map (transf env) args in
match args with
| [] -> f_tt
| [f] -> f
| fs -> f_tuple fs
end
| PFident ({ pl_desc = name; pl_loc = loc }, tvi) ->
let tvi = tvi |> omap (transtvi env ue) in
let ops = select_form_op env opsc name ue tvi [] in
begin match ops with
| [] ->
tyerror loc env (UnknownVarOrOp (name, []))
| [sel] -> begin
let op = form_of_opselect (env, ue) loc sel [] in
let inmem =
match op.f_node with
| Fpvar _ | Fproj ({ f_node = Fpvar _ }, _) -> true
| _ -> false in
if inmem then PFS.set_memused state; op
end
| _ ->
let matches = List.map (fun (_, _, subue, m) -> (m, subue)) ops in
tyerror loc env (MultipleOpMatch (name, [], matches))
end
| PFside (f, side) -> begin
let (sloc, side) = (side.pl_loc, unloc side) in
let me =
match EcEnv.Memory.lookup side env with
| None -> tyerror sloc env (UnknownMemName side)
| Some me -> EcMemory.memory me
in
let used, aout =
PFS.new_memused
(transf (EcEnv.Memory.set_active me env))
state f
in
if not used then begin
let ppe = EcPrinting.PPEnv.ofenv env in
EcEnv.notify ~immediate:false env `Warning
"unused memory `%s', while typing %a"
side (EcPrinting.pp_form ppe) aout
end;
aout
end
| PFeqveq (xs, om) ->
let lookup me x =
let idme = destr_local me in
match EcEnv.Var.lookup_progvar_opt ~side:idme (unloc x) env with
| None -> tyerror x.pl_loc env (UnknownVarOrOp (unloc x, []))
| Some (x, ty) ->
match x with
| `Var x -> f_pvar x ty me
| `Proj (x, ty', (i, n)) ->
if i = 0 && n = 1
then f_pvar x ty me
else f_proj (f_pvar x ty' me) i ty
in
let check_mem loc me =
match EcEnv.Memory.byid me env with
| None -> tyerror loc env (UnknownMemName (EcIdent.name me))
| Some (id,mt) -> f_local id (tmem mt)
in
let qual (mq : pmsymbol option) (x : pqsymbol) =
match mq with
| None -> x
| Some qs ->
let (nm, name) = x.pl_desc in
{ x with pl_desc = ((List.map (unloc |- fst) qs)@nm, name) }
in
let mleft = check_mem f.pl_loc EcFol.mleft in
let mright = check_mem f.pl_loc EcFol.mright in
let do1 = function
| GVvar x ->
let x1 = lookup mleft (qual (om |> omap fst) x) in
let x2 = lookup mright (qual (om |> omap snd) x) in
unify_or_fail env ue x.pl_loc ~expct:x1.f_ty x2.f_ty;
f_eq x1 x2
| GVglob gp ->
let (mp, _) = trans_msymbol env gp in
let x1 = f_glob mp mleft in
let x2 = f_glob mp mright in
unify_or_fail env ue gp.pl_loc ~expct:x1.f_ty x2.f_ty;
f_eq x1 x2
in
EcFol.f_ands (List.map do1 xs)
| PFeqf fs ->
let check_mem loc me =
match EcEnv.Memory.byid me env with
| None -> tyerror loc env (UnknownMemName (EcIdent.name me))
| Some _ -> ()
and do1 (me1, me2) f =
let _, f1 =
PFS.new_memused
(transf (EcEnv.Memory.set_active me1 env))
state f in
let _, f2 =
PFS.new_memused
(transf (EcEnv.Memory.set_active me2 env))
state f in
unify_or_fail env ue f.pl_loc ~expct:f1.f_ty f2.f_ty;
f_eq f1 f2
in
check_mem f.pl_loc EcFol.mleft;
check_mem f.pl_loc EcFol.mright;
EcFol.f_ands (List.map (do1 (EcFol.mleft, EcFol.mright)) fs)
| PFapp ({pl_desc = PFident ({ pl_desc = name; pl_loc = loc }, tvi)}, pes) ->
let tvi = tvi |> omap (transtvi env ue) in
let es = List.map (transf env) pes in
let esig = List.map EcFol.f_ty es in
let ops = select_form_op env opsc name ue tvi esig in
begin match ops with
| [] ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
tyerror loc env (UnknownVarOrOp (name, esig))
| [sel] ->
let es = List.map2 (fun e l -> mk_loc l.pl_loc e) es pes in
form_of_opselect (env, ue) loc sel es
| _ ->
let esig = Tuni.offun_dom (EcUnify.UniEnv.assubst ue) esig in
let matches = List.map (fun (_, _, subue, m) -> (m, subue)) ops in
tyerror loc env (MultipleOpMatch (name, esig, matches))
end
| PFapp (e, pes) ->
let es = List.map (transf env) pes in
let esig = List.map2 (fun f l -> mk_loc l.pl_loc f.f_ty) es pes in
let op = transf env e in
let codom = ty_fun_app e.pl_loc env ue op.f_ty esig in
f_app op es codom
| PFif (pf1, pf2, pf3) ->
let f1 = transf env pf1 in
let f2 = transf env pf2 in
let f3 = transf env pf3 in
unify_or_fail env ue pf1.pl_loc ~expct:tbool f1.f_ty;
unify_or_fail env ue pf3.pl_loc ~expct:f2.f_ty f3.f_ty;
f_if f1 f2 f3
| PFlet (lp, (pf1, paty), f2) ->
let (penv, p, pty) = transpattern env ue lp in
let aty = paty |> omap (transty tp_uni env ue) in
let f1 = transf env pf1 in
unify_or_fail env ue pf1.pl_loc ~expct:pty f1.f_ty;
aty |> oiter (fun aty-> unify_or_fail env ue pf1.pl_loc ~expct:pty aty);
let f2 = transf penv f2 in
f_let p f1 f2
| PFforall (xs, pf) ->
let env, xs = trans_gbinding env ue xs in
let f = transf env pf in
unify_or_fail env ue pf.pl_loc ~expct:tbool f.f_ty;
f_forall xs f
| PFexists (xs, f1) ->
let env, xs = trans_gbinding env ue xs in
let f = transf env f1 in
unify_or_fail env ue f1.pl_loc ~expct:tbool f.f_ty;
f_exists xs f
| PFlambda (xs, f1) ->
let env, xs = trans_binding env ue xs in
let f = transf env f1 in
f_lambda (List.map (fun (x,ty) -> (x,GTty ty)) xs) f
| PFrecord fields ->
let (ctor, fields, (rtvi, reccty)) =
trans_record env ue
(fun f -> let f = transf env f in (f, f.f_ty))
(f.pl_loc, fields) in
let ctor = f_op ctor rtvi (toarrow (List.map snd fields) reccty) in
let ctor = f_app ctor (List.map fst fields) reccty in
ctor
| PFproj (subf, x) -> begin
let subf = transf env subf in
match select_proj env opsc (unloc x) ue None subf.f_ty with
| [] ->
let ty = Tuni.offun (EcUnify.UniEnv.assubst ue) subf.f_ty in
let mp =
match ty.ty_node with
| Tglob mp -> mp
| _ -> tyerror x.pl_loc env (UnknownProj (unloc x)) in
let f =
NormMp.norm_glob env (f_local EcFol.mhr (tmem None)) mp in
let lf =
match f.f_node with
| Ftuple l -> l
| _ -> tyerror x.pl_loc env (UnknownProj (unloc x)) in
let vx, ty =
match EcEnv.Var.lookup_progvar_opt ~side:EcFol.mhr (unloc x) env with
| None ->
tyerror x.pl_loc env (UnknownVarOrOp (unloc x, []))
| Some (`Var x, ty) ->
NormMp.norm_pvar env x, ty
| _ ->
tyerror x.pl_loc env (UnknownVarOrOp (unloc x, [])) in
let find = function
| { f_node = Fpvar (x, _) } ->
EcTypes.pv_equal vx (NormMp.norm_pvar env x)
| _ -> false in
let i =
match List.oindex find lf with
| None -> tyerror x.pl_loc env (UnknownProj (unloc x))
| Some i -> i
in f_proj subf i ty
| _ :: _ :: _ ->
tyerror x.pl_loc env (AmbiguousProj (unloc x))
| [(op, tvi), pty, subue] ->
EcUnify.UniEnv.restore ~src:subue ~dst:ue;
let rty = EcUnify.UniEnv.fresh ue in
(try EcUnify.unify env ue (tfun subf.f_ty rty) pty
with EcUnify.UnificationFailure _ -> assert false);
f_app (f_op op tvi pty) [subf] rty
end
| PFproji (psubf, i) -> begin
let subf = transf env psubf in
let ty = Tuni.offun (EcUnify.UniEnv.assubst ue) subf.f_ty in
match (EcEnv.Ty.hnorm ty env).ty_node with
| Ttuple l when i < List.length l ->
f_proj subf i (List.nth l i)
| _ ->
tyerror psubf.pl_loc env (AmbiguousProji (i, ty))
end
| PFprob (gp, args, m, event) ->
let fpath = trans_gamepath env gp in
let fun_ = EcEnv.Fun.by_xpath fpath env in
let args,_ =
transcall (fun f -> let f = transf env f in f, f.f_ty)
env ue f.pl_loc fun_.f_sig args in
let memid = transmem env m in
let env = EcEnv.Fun.prF fpath env in
let event' = transf env event in
unify_or_fail env ue event.pl_loc ~expct:tbool event'.f_ty;
f_pr memid fpath (f_tuple args) event'
| PFhoareF (pre, gp, post) ->
let fpath = trans_gamepath env gp in
let penv, qenv = EcEnv.Fun.hoareF fpath env in
let pre' = transf penv pre in
let post' = transf qenv post in
unify_or_fail penv ue pre.pl_loc ~expct:tbool pre' .f_ty;
unify_or_fail qenv ue post.pl_loc ~expct:tbool post'.f_ty;
f_hoareF pre' fpath post'
| PFBDhoareF (pre, gp, post, hcmp, bd) ->
let fpath = trans_gamepath env gp in
let penv, qenv = EcEnv.Fun.hoareF fpath env in
let pre' = transf penv pre in
let post' = transf qenv post in
let bd' = transf penv bd in
(* FIXME: check that there are not pvars in bd *)
unify_or_fail penv ue pre .pl_loc ~expct:tbool pre' .f_ty;
unify_or_fail qenv ue post.pl_loc ~expct:tbool post'.f_ty;
unify_or_fail env ue bd .pl_loc ~expct:treal bd' .f_ty;
f_bdHoareF pre' fpath post' hcmp bd'
| PFlsless gp ->
let fpath = trans_gamepath env gp in
f_losslessF fpath
| PFequivF (pre, (gp1, gp2), post) ->
let fpath1 = trans_gamepath env gp1 in
let fpath2 = trans_gamepath env gp2 in
let penv, qenv = EcEnv.Fun.equivF fpath1 fpath2 env in
let pre' = transf penv pre in
let post' = transf qenv post in
unify_or_fail penv ue pre .pl_loc ~expct:tbool pre' .f_ty;
unify_or_fail qenv ue post.pl_loc ~expct:tbool post'.f_ty;
f_equivF pre' fpath1 fpath2 post'
| PFeagerF (pre, (s1,gp1,gp2,s2), post) ->
let fpath1 = trans_gamepath env gp1 in
let fpath2 = trans_gamepath env gp2 in
let penv, qenv = EcEnv.Fun.equivF fpath1 fpath2 env in
let pre' = transf penv pre in
let post' = transf qenv post in
let s1 = transstmt env ue s1 in
let s2 = transstmt env ue s2 in
unify_or_fail penv ue pre .pl_loc ~expct:tbool pre' .f_ty;
unify_or_fail qenv ue post.pl_loc ~expct:tbool post'.f_ty;
f_eagerF pre' s1 fpath1 fpath2 s2 post'
| PFmuhoareF (pre, gp, post) ->
let fpath = trans_gamepath env gp in
let penv, qenv = EcEnv.Fun.muhoareF fpath env in
let pre' = transf penv pre in
let post' = transf qenv post in
unify_or_fail penv ue pre.pl_loc ~expct:tbool pre' .f_ty;
unify_or_fail qenv ue post.pl_loc ~expct:tbool post'.f_ty;
let get env p =
let x, mt = oget (EcEnv.MemDistr.current env) in
f_lambda [x,GTty (tdistr (tmem mt))] p in
let pre' = get penv pre' in
let post' = get qenv post' in
f_muhoareF pre' fpath post'
| PFintegr(ff,mu) ->
let ty, mu = trans_mu opsc env f.pl_loc mu in
let ff' = trans_integr_body opsc env ty ff in
unify_or_fail env ue ff.pl_loc ~expct:(toarrow [ty] treal) ff'.f_ty;
f_muf_ty ty ff' mu
| PFsquare(ff,mu) ->
let ty, mu = trans_mu opsc env f.pl_loc mu in
let ff' = trans_integr_body opsc env ty ff in
unify_or_fail env ue ff.pl_loc ~expct:(toarrow [ty] tbool) ff'.f_ty;
let x, body =
match ff'.f_node with
| Fquant(Llambda,[x,_],body) -> x, body
| _ ->
let x = EcIdent.create "x" in
x, f_app ff' [f_local x ty] tbool in
f_eq
(f_muf_ty ty (f_lambda [x,GTty ty] (f_real_of_bool (f_not body))) mu)
f_r0
and trans_mu opsc env loc pf =
match pf with
| None ->
begin match EcEnv.MemDistr.current env with
| None -> tyerror loc env NoActiveDistr
| Some (mu,mt) ->
let ty = tmem mt in
ty, f_local mu (tdistr ty)
end
| Some pf ->
let f = transf_r opsc env pf in
let ty = UE.fresh ue in
unify_or_fail env ue loc ~expct:(tdistr ty) f.f_ty;
Tuni.offun (EcUnify.UniEnv.assubst ue) ty, f
and trans_integr_body opsc env ty ff =
if EcUnify.is_tmem env ty then
let m,body =
match ff.pl_desc with
| PFlambda([[m], {pl_desc = PTunivar}], body) ->
ident_of_osymbol (unloc m), body
| _ -> EcCoreFol.mhr, ff in
let mt = EcUnify.destr_tmem env ty in
let env' = EcEnv.Memory.push_active (m,mt) env in
let body' = transf_r opsc env' body in
f_lambda [m,GTty ty] body'
else transf_r opsc env ff
in
let f = transf_r None env pf in
tt |> oiter (fun tt -> unify_or_fail env ue pf.pl_loc ~expct:tt f.f_ty);
f
(* -------------------------------------------------------------------- *)
let trans_form_opt env ue pf oty =
trans_form_or_pattern env (None, ue) pf oty
(* -------------------------------------------------------------------- *)
let trans_form env ue pf ty =
trans_form_opt env ue pf (Some ty)
(* -------------------------------------------------------------------- *)
let trans_prop env ue pf =
trans_form env ue pf tbool
(* -------------------------------------------------------------------- *)
let trans_pattern env (ps, ue) pf =
trans_form_or_pattern env (Some ps, ue) pf None
(* -------------------------------------------------------------------- *)
let get_instances (tvi, bty) env =
let inst = List.pmap
(function
| (_, (`Ring _ | `Field _)) as x -> Some x
| _ -> None)
(EcEnv.TypeClass.get_instances env) in
List.pmap (fun ((typ, gty), cr) ->
let ue = EcUnify.UniEnv.create (Some tvi) in
let (gty, _typ) = EcUnify.UniEnv.openty ue typ None gty in
try
EcUnify.unify env ue bty gty;
Some (inst, Tuni.offun (EcUnify.UniEnv.close ue) gty, cr)
with EcUnify.UnificationFailure _ -> None)
inst
let get_ring (typ, ty) env =
let module E = struct exception Found of ring end in
try
List.iter
(fun (_, _, cr) ->
match cr with
| `Ring cr -> raise (E.Found cr)
| _ -> ())
(get_instances (typ, ty) env);
None
with E.Found cr -> Some cr
let get_field (typ, ty) env =
let module E = struct exception Found of field end in
try
List.iter
(fun (_, _, cr) ->
match cr with
| `Field cr -> raise (E.Found cr)
| _ -> ())
(get_instances (typ, ty) env);
None
with E.Found cr -> Some cr
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