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|
(* Copyright (c) 2008, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure ElabEnv :> ELAB_ENV = struct
open Elab
structure U = ElabUtil
structure IM = IntBinaryMap
structure SM = BinaryMapFn(struct
type ord_key = string
val compare = String.compare
end)
exception UnboundRel of int
exception UnboundNamed of int
(* AST utility functions *)
exception SynUnif
val liftConInCon =
U.Con.mapB {kind = fn k => k,
con = fn bound => fn c =>
case c of
CRel xn =>
if xn < bound then
c
else
CRel (xn + 1)
(*| CUnif _ => raise SynUnif*)
| _ => c,
bind = fn (bound, U.Con.Rel _) => bound + 1
| (bound, _) => bound}
val lift = liftConInCon 0
val liftConInExp =
U.Exp.mapB {kind = fn k => k,
con = fn bound => fn c =>
case c of
CRel xn =>
if xn < bound then
c
else
CRel (xn + 1)
| _ => c,
exp = fn _ => fn e => e,
bind = fn (bound, U.Exp.RelC _) => bound + 1
| (bound, _) => bound}
val liftExpInExp =
U.Exp.mapB {kind = fn k => k,
con = fn _ => fn c => c,
exp = fn bound => fn e =>
case e of
ERel xn =>
if xn < bound then
e
else
ERel (xn + 1)
| _ => e,
bind = fn (bound, U.Exp.RelE _) => bound + 1
| (bound, _) => bound}
val liftExp = liftExpInExp 0
val subExpInExp =
U.Exp.mapB {kind = fn k => k,
con = fn _ => fn c => c,
exp = fn (xn, rep) => fn e =>
case e of
ERel xn' =>
(case Int.compare (xn', xn) of
EQUAL => #1 rep
| GREATER=> ERel (xn' - 1)
| LESS => e)
| _ => e,
bind = fn ((xn, rep), U.Exp.RelE _) => (xn+1, liftExpInExp 0 rep)
| ((xn, rep), U.Exp.RelC _) => (xn, liftConInExp 0 rep)
| (ctx, _) => ctx}
(* Back to environments *)
datatype 'a var' =
Rel' of int * 'a
| Named' of int * 'a
datatype 'a var =
NotBound
| Rel of int * 'a
| Named of int * 'a
type datatyp = string list * (string * con option) IM.map
datatype class_name =
ClNamed of int
| ClProj of int * string list * string
fun cn2s cn =
case cn of
ClNamed n => "Named(" ^ Int.toString n ^ ")"
| ClProj (m, ms, x) => "Proj(" ^ Int.toString m ^ "," ^ String.concatWith "," ms ^ "," ^ x ^ ")"
structure CK = struct
type ord_key = class_name
open Order
fun compare x =
case x of
(ClNamed n1, ClNamed n2) => Int.compare (n1, n2)
| (ClNamed _, _) => LESS
| (_, ClNamed _) => GREATER
| (ClProj (m1, ms1, x1), ClProj (m2, ms2, x2)) =>
join (Int.compare (m1, m2),
fn () => join (joinL String.compare (ms1, ms2),
fn () => String.compare (x1, x2)))
end
structure CM = BinaryMapFn(CK)
datatype class_key =
CkNamed of int
| CkRel of int
| CkProj of int * string list * string
| CkApp of class_key * class_key
fun ck2s ck =
case ck of
CkNamed n => "Named(" ^ Int.toString n ^ ")"
| CkRel n => "Rel(" ^ Int.toString n ^ ")"
| CkProj (m, ms, x) => "Proj(" ^ Int.toString m ^ "," ^ String.concatWith "," ms ^ "," ^ x ^ ")"
| CkApp (ck1, ck2) => "App(" ^ ck2s ck1 ^ ", " ^ ck2s ck2 ^ ")"
fun cp2s (cn, ck) = "(" ^ cn2s cn ^ "," ^ ck2s ck ^ ")"
structure KK = struct
type ord_key = class_key
open Order
fun compare x =
case x of
(CkNamed n1, CkNamed n2) => Int.compare (n1, n2)
| (CkNamed _, _) => LESS
| (_, CkNamed _) => GREATER
| (CkRel n1, CkRel n2) => Int.compare (n1, n2)
| (CkRel _, _) => LESS
| (_, CkRel _) => GREATER
| (CkProj (m1, ms1, x1), CkProj (m2, ms2, x2)) =>
join (Int.compare (m1, m2),
fn () => join (joinL String.compare (ms1, ms2),
fn () => String.compare (x1, x2)))
| (CkProj _, _) => LESS
| (_, CkProj _) => GREATER
| (CkApp (f1, x1), CkApp (f2, x2)) =>
join (compare (f1, f2),
fn () => compare (x1, x2))
end
structure KM = BinaryMapFn(KK)
type class = {
ground : exp KM.map
}
val empty_class = {
ground = KM.empty
}
fun printClasses cs = (print "Classes:\n";
CM.appi (fn (cn, {ground = km}) =>
(print (cn2s cn ^ ":");
KM.appi (fn (ck, _) => print (" " ^ ck2s ck)) km;
print "\n")) cs)
type env = {
renameC : kind var' SM.map,
relC : (string * kind) list,
namedC : (string * kind * con option) IM.map,
datatypes : datatyp IM.map,
constructors : (datatype_kind * int * string list * con option * int) SM.map,
classes : class CM.map,
renameE : con var' SM.map,
relE : (string * con) list,
namedE : (string * con) IM.map,
renameSgn : (int * sgn) SM.map,
sgn : (string * sgn) IM.map,
renameStr : (int * sgn) SM.map,
str : (string * sgn) IM.map
}
val namedCounter = ref 0
fun newNamed () =
let
val r = !namedCounter
in
namedCounter := r + 1;
r
end
val empty = {
renameC = SM.empty,
relC = [],
namedC = IM.empty,
datatypes = IM.empty,
constructors = SM.empty,
classes = CM.empty,
renameE = SM.empty,
relE = [],
namedE = IM.empty,
renameSgn = SM.empty,
sgn = IM.empty,
renameStr = SM.empty,
str = IM.empty
}
fun liftClassKey ck =
case ck of
CkNamed _ => ck
| CkRel n => CkRel (n + 1)
| CkProj _ => ck
| CkApp (ck1, ck2) => CkApp (liftClassKey ck1, liftClassKey ck2)
fun pushCRel (env : env) x k =
let
val renameC = SM.map (fn Rel' (n, k) => Rel' (n+1, k)
| x => x) (#renameC env)
in
{renameC = SM.insert (renameC, x, Rel' (0, k)),
relC = (x, k) :: #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = CM.map (fn class => {
ground = KM.foldli (fn (ck, e, km) =>
KM.insert (km, liftClassKey ck, e))
KM.empty (#ground class)
})
(#classes env),
renameE = SM.map (fn Rel' (n, c) => Rel' (n, lift c)
| Named' (n, c) => Named' (n, c)) (#renameE env),
relE = map (fn (x, c) => (x, lift c)) (#relE env),
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env
}
end
fun lookupCRel (env : env) n =
(List.nth (#relC env, n))
handle Subscript => raise UnboundRel n
fun pushCNamedAs (env : env) x n k co =
{renameC = SM.insert (#renameC env, x, Named' (n, k)),
relC = #relC env,
namedC = IM.insert (#namedC env, n, (x, k, co)),
datatypes = #datatypes env,
constructors = #constructors env,
classes = #classes env,
renameE = #renameE env,
relE = #relE env,
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env}
fun pushCNamed env x k co =
let
val n = !namedCounter
in
namedCounter := n + 1;
(pushCNamedAs env x n k co, n)
end
fun lookupCNamed (env : env) n =
case IM.find (#namedC env, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun lookupC (env : env) x =
case SM.find (#renameC env, x) of
NONE => NotBound
| SOME (Rel' x) => Rel x
| SOME (Named' x) => Named x
fun pushDatatype (env : env) n xs xncs =
let
val dk = U.classifyDatatype xncs
in
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = IM.insert (#datatypes env, n,
(xs, foldl (fn ((x, n, to), cons) =>
IM.insert (cons, n, (x, to))) IM.empty xncs)),
constructors = foldl (fn ((x, n', to), cmap) =>
SM.insert (cmap, x, (dk, n', xs, to, n)))
(#constructors env) xncs,
classes = #classes env,
renameE = #renameE env,
relE = #relE env,
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env}
end
fun lookupDatatype (env : env) n =
case IM.find (#datatypes env, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun lookupDatatypeConstructor (_, dt) n =
case IM.find (dt, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun lookupConstructor (env : env) s = SM.find (#constructors env, s)
fun datatypeArgs (xs, _) = xs
fun constructors (_, dt) = IM.foldri (fn (n, (x, to), ls) => (x, n, to) :: ls) [] dt
fun pushClass (env : env) n =
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = CM.insert (#classes env, ClNamed n, {ground = KM.empty}),
renameE = #renameE env,
relE = #relE env,
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env}
fun class_name_in (c, _) =
case c of
CNamed n => SOME (ClNamed n)
| CModProj x => SOME (ClProj x)
| CUnif (_, _, _, ref (SOME c)) => class_name_in c
| _ => NONE
fun isClass (env : env) c =
let
fun find NONE = false
| find (SOME c) = Option.isSome (CM.find (#classes env, c))
in
find (class_name_in c)
end
fun class_key_in (c, _) =
case c of
CRel n => SOME (CkRel n)
| CNamed n => SOME (CkNamed n)
| CModProj x => SOME (CkProj x)
| CUnif (_, _, _, ref (SOME c)) => class_key_in c
| CApp (c1, c2) =>
(case (class_key_in c1, class_key_in c2) of
(SOME k1, SOME k2) => SOME (CkApp (k1, k2))
| _ => NONE)
| _ => NONE
fun class_pair_in (c, _) =
case c of
CApp (f, x) =>
(case (class_name_in f, class_key_in x) of
(SOME f, SOME x) => SOME (f, x)
| _ => NONE)
| CUnif (_, _, _, ref (SOME c)) => class_pair_in c
| _ => NONE
fun resolveClass (env : env) c =
case class_pair_in c of
SOME (f, x) =>
(case CM.find (#classes env, f) of
NONE => NONE
| SOME class =>
case KM.find (#ground class, x) of
NONE => NONE
| SOME e => SOME e)
| _ => NONE
fun pushERel (env : env) x t =
let
val renameE = SM.map (fn Rel' (n, t) => Rel' (n+1, t)
| x => x) (#renameE env)
val classes = CM.map (fn class => {
ground = KM.map liftExp (#ground class)
}) (#classes env)
val classes = case class_pair_in t of
NONE => classes
| SOME (f, x) =>
case CM.find (classes, f) of
NONE => classes
| SOME class =>
let
val class = {
ground = KM.insert (#ground class, x, (ERel 0, #2 t))
}
in
CM.insert (classes, f, class)
end
in
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = classes,
renameE = SM.insert (renameE, x, Rel' (0, t)),
relE = (x, t) :: #relE env,
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env}
end
fun lookupERel (env : env) n =
(List.nth (#relE env, n))
handle Subscript => raise UnboundRel n
fun pushENamedAs (env : env) x n t =
let
val classes = #classes env
val classes = case class_pair_in t of
NONE => classes
| SOME (f, x) =>
case CM.find (classes, f) of
NONE => classes
| SOME class =>
let
val class = {
ground = KM.insert (#ground class, x, (ENamed n, #2 t))
}
in
CM.insert (classes, f, class)
end
in
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = classes,
renameE = SM.insert (#renameE env, x, Named' (n, t)),
relE = #relE env,
namedE = IM.insert (#namedE env, n, (x, t)),
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = #renameStr env,
str = #str env}
end
fun pushENamed env x t =
let
val n = !namedCounter
in
namedCounter := n + 1;
(pushENamedAs env x n t, n)
end
fun lookupENamed (env : env) n =
case IM.find (#namedE env, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun checkENamed (env : env) n =
Option.isSome (IM.find (#namedE env, n))
fun lookupE (env : env) x =
case SM.find (#renameE env, x) of
NONE => NotBound
| SOME (Rel' x) => Rel x
| SOME (Named' x) => Named x
fun pushSgnNamedAs (env : env) x n sgis =
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = #classes env,
renameE = #renameE env,
relE = #relE env,
namedE = #namedE env,
renameSgn = SM.insert (#renameSgn env, x, (n, sgis)),
sgn = IM.insert (#sgn env, n, (x, sgis)),
renameStr = #renameStr env,
str = #str env}
fun pushSgnNamed env x sgis =
let
val n = !namedCounter
in
namedCounter := n + 1;
(pushSgnNamedAs env x n sgis, n)
end
fun lookupSgnNamed (env : env) n =
case IM.find (#sgn env, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun lookupSgn (env : env) x = SM.find (#renameSgn env, x)
fun lookupStrNamed (env : env) n =
case IM.find (#str env, n) of
NONE => raise UnboundNamed n
| SOME x => x
fun lookupStr (env : env) x = SM.find (#renameStr env, x)
fun sgiSeek (sgi, (sgns, strs, cons)) =
case sgi of
SgiConAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
| SgiCon (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
| SgiDatatype (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
| SgiDatatypeImp (x, n, _, _, _, _, _) => (sgns, strs, IM.insert (cons, n, x))
| SgiVal _ => (sgns, strs, cons)
| SgiSgn (x, n, _) => (IM.insert (sgns, n, x), strs, cons)
| SgiStr (x, n, _) => (sgns, IM.insert (strs, n, x), cons)
| SgiConstraint _ => (sgns, strs, cons)
| SgiClassAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
| SgiClass (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
fun sgnSeek f sgis =
let
fun seek (sgis, sgns, strs, cons) =
case sgis of
[] => NONE
| (sgi, _) :: sgis =>
case f sgi of
SOME v =>
let
val cons =
case sgi of
SgiDatatype (x, n, _, _) => IM.insert (cons, n, x)
| SgiDatatypeImp (x, n, _, _, _, _, _) => IM.insert (cons, n, x)
| _ => cons
in
SOME (v, (sgns, strs, cons))
end
| NONE =>
let
val (sgns, strs, cons) = sgiSeek (sgi, (sgns, strs, cons))
in
seek (sgis, sgns, strs, cons)
end
in
seek (sgis, IM.empty, IM.empty, IM.empty)
end
fun id x = x
fun unravelStr (str, _) =
case str of
StrVar x => (x, [])
| StrProj (str, m) =>
let
val (x, ms) = unravelStr str
in
(x, ms @ [m])
end
| _ => raise Fail "unravelStr"
fun sgnS_con (str, (sgns, strs, cons)) c =
case c of
CModProj (m1, ms, x) =>
(case IM.find (strs, m1) of
NONE => c
| SOME m1x =>
let
val (m1, ms') = unravelStr str
in
CModProj (m1, ms' @ m1x :: ms, x)
end)
| CNamed n =>
(case IM.find (cons, n) of
NONE => c
| SOME nx =>
let
val (m1, ms) = unravelStr str
in
CModProj (m1, ms, nx)
end)
| _ => c
fun sgnS_con' (arg as (m1, ms', (sgns, strs, cons))) c =
case c of
CModProj (m1, ms, x) =>
(case IM.find (strs, m1) of
NONE => c
| SOME m1x => CModProj (m1, ms' @ m1x :: ms, x))
| CNamed n =>
(case IM.find (cons, n) of
NONE => c
| SOME nx => CModProj (m1, ms', nx))
| CApp (c1, c2) => CApp ((sgnS_con' arg (#1 c1), #2 c1),
(sgnS_con' arg (#1 c2), #2 c2))
| _ => c
fun sgnS_sgn (str, (sgns, strs, cons)) sgn =
case sgn of
SgnProj (m1, ms, x) =>
(case IM.find (strs, m1) of
NONE => sgn
| SOME m1x =>
let
val (m1, ms') = unravelStr str
in
SgnProj (m1, ms' @ m1x :: ms, x)
end)
| SgnVar n =>
(case IM.find (sgns, n) of
NONE => sgn
| SOME nx =>
let
val (m1, ms) = unravelStr str
in
SgnProj (m1, ms, nx)
end)
| _ => sgn
fun sgnSubSgn x =
ElabUtil.Sgn.map {kind = id,
con = sgnS_con x,
sgn_item = id,
sgn = sgnS_sgn x}
and projectSgn env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
(case sgnSeek (fn SgiSgn (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
NONE => NONE
| SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
| SgnError => SOME (SgnError, ErrorMsg.dummySpan)
| _ => NONE
and hnormSgn env (all as (sgn, loc)) =
case sgn of
SgnError => all
| SgnVar n => hnormSgn env (#2 (lookupSgnNamed env n))
| SgnConst _ => all
| SgnFun _ => all
| SgnProj (m, ms, x) =>
let
val (_, sgn) = lookupStrNamed env m
in
case projectSgn env {str = foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms,
sgn = sgn,
field = x} of
NONE => raise Fail "ElabEnv.hnormSgn: projectSgn failed"
| SOME sgn => sgn
end
| SgnWhere (sgn, x, c) =>
case #1 (hnormSgn env sgn) of
SgnError => (SgnError, loc)
| SgnConst sgis =>
let
fun traverse (pre, post) =
case post of
[] => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [1]"
| (sgi as (SgiConAbs (x', n, k), loc)) :: rest =>
if x = x' then
List.revAppend (pre, (SgiCon (x', n, k, c), loc) :: rest)
else
traverse (sgi :: pre, rest)
| sgi :: rest => traverse (sgi :: pre, rest)
val sgis = traverse ([], sgis)
in
(SgnConst sgis, loc)
end
| _ => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [2]"
fun enrichClasses env classes (m1, ms) sgn =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
let
val (classes, _, _, _) =
foldl (fn (sgi, (classes, newClasses, fmap, env)) =>
let
fun found (x, n) =
(CM.insert (classes,
ClProj (m1, ms, x),
empty_class),
IM.insert (newClasses, n, x),
sgiSeek (#1 sgi, fmap),
env)
fun default () = (classes, newClasses, sgiSeek (#1 sgi, fmap), env)
in
case #1 sgi of
SgiStr (x, _, sgn) =>
(enrichClasses env classes (m1, ms @ [x]) sgn,
newClasses,
sgiSeek (#1 sgi, fmap),
env)
| SgiSgn (x, n, sgn) =>
(classes,
newClasses,
fmap,
pushSgnNamedAs env x n sgn)
| SgiClassAbs (x, n, _) => found (x, n)
| SgiClass (x, n, _, _) => found (x, n)
| SgiVal (x, n, (CApp (f, a), _)) =>
let
fun unravel c =
case #1 c of
CUnif (_, _, _, ref (SOME c)) => unravel c
| CNamed n =>
((case lookupCNamed env n of
(_, _, SOME c) => unravel c
| _ => c)
handle UnboundNamed _ => c)
| _ => c
val nc =
case f of
(CNamed f, _) => IM.find (newClasses, f)
| _ => NONE
in
case nc of
NONE =>
(case (class_name_in (unravel f),
class_key_in (sgnS_con' (m1, ms, fmap) (#1 a), #2 a)) of
(SOME cn, SOME ck) =>
let
val classes =
case CM.find (classes, cn) of
NONE => classes
| SOME class =>
let
val class = {
ground = KM.insert (#ground class, ck,
(EModProj (m1, ms, x), #2 sgn))
}
in
CM.insert (classes, cn, class)
end
in
(classes,
newClasses,
fmap,
env)
end
| _ => default ())
| SOME fx =>
case class_key_in (sgnS_con' (m1, ms, fmap) (#1 a), #2 a) of
NONE => default ()
| SOME ck =>
let
val cn = ClProj (m1, ms, fx)
val classes =
case CM.find (classes, cn) of
NONE => classes
| SOME class =>
let
val class = {
ground = KM.insert (#ground class, ck,
(EModProj (m1, ms, x), #2 sgn))
}
in
CM.insert (classes, cn, class)
end
in
(classes,
newClasses,
fmap,
env)
end
end
| SgiVal _ => default ()
| _ => default ()
end)
(classes, IM.empty, (IM.empty, IM.empty, IM.empty), env) sgis
in
classes
end
| _ => classes
fun pushStrNamedAs (env : env) x n sgn =
{renameC = #renameC env,
relC = #relC env,
namedC = #namedC env,
datatypes = #datatypes env,
constructors = #constructors env,
classes = enrichClasses env (#classes env) (n, []) sgn,
renameE = #renameE env,
relE = #relE env,
namedE = #namedE env,
renameSgn = #renameSgn env,
sgn = #sgn env,
renameStr = SM.insert (#renameStr env, x, (n, sgn)),
str = IM.insert (#str env, n, (x, sgn))}
fun pushStrNamed env x sgn =
let
val n = !namedCounter
in
namedCounter := n + 1;
(pushStrNamedAs env x n sgn, n)
end
fun sgiBinds env (sgi, loc) =
case sgi of
SgiConAbs (x, n, k) => pushCNamedAs env x n k NONE
| SgiCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
| SgiDatatype (x, n, xs, xncs) =>
let
val k = (KType, loc)
val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
val env = pushCNamedAs env x n k' NONE
in
foldl (fn ((x', n', to), env) =>
let
val t =
case to of
NONE => (CNamed n, loc)
| SOME t => (TFun (t, (CNamed n, loc)), loc)
val k = (KType, loc)
val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
in
pushENamedAs env x' n' t
end)
env xncs
end
| SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
let
val k = (KType, loc)
val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
val env = pushCNamedAs env x n k' (SOME (CModProj (m1, ms, x'), loc))
in
foldl (fn ((x', n', to), env) =>
let
val t =
case to of
NONE => (CNamed n, loc)
| SOME t => (TFun (t, (CNamed n, loc)), loc)
val k = (KType, loc)
val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
in
pushENamedAs env x' n' t
end)
env xncs
end
| SgiVal (x, n, t) => pushENamedAs env x n t
| SgiStr (x, n, sgn) => pushStrNamedAs env x n sgn
| SgiSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
| SgiConstraint _ => env
| SgiClassAbs (x, n, k) => pushCNamedAs env x n (KArrow (k, (KType, loc)), loc) NONE
| SgiClass (x, n, k, c) => pushCNamedAs env x n (KArrow (k, (KType, loc)), loc) (SOME c)
fun sgnSubCon x =
ElabUtil.Con.map {kind = id,
con = sgnS_con x}
fun projectStr env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
(case sgnSeek (fn SgiStr (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
NONE => NONE
| SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
| SgnError => SOME (SgnError, ErrorMsg.dummySpan)
| _ => NONE
fun chaseMpath env (n, ms) =
let
val (_, sgn) = lookupStrNamed env n
in
foldl (fn (m, (str, sgn)) =>
case projectStr env {sgn = sgn, str = str, field = m} of
NONE => raise Fail "kindof: Unknown substructure"
| SOME sgn => ((StrProj (str, m), #2 sgn), sgn))
((StrVar n, #2 sgn), sgn) ms
end
fun projectCon env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
(case sgnSeek (fn SgiConAbs (x, _, k) => if x = field then SOME (k, NONE) else NONE
| SgiCon (x, _, k, c) => if x = field then SOME (k, SOME c) else NONE
| SgiDatatype (x, _, xs, _) =>
if x = field then
let
val k = (KType, #2 sgn)
val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
in
SOME (k', NONE)
end
else
NONE
| SgiDatatypeImp (x, _, m1, ms, x', xs, _) =>
if x = field then
let
val k = (KType, #2 sgn)
val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
in
SOME (k', SOME (CModProj (m1, ms, x'), #2 sgn))
end
else
NONE
| SgiClassAbs (x, _, k) => if x = field then
SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), NONE)
else
NONE
| SgiClass (x, _, k, c) => if x = field then
SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), SOME c)
else
NONE
| _ => NONE) sgis of
NONE => NONE
| SOME ((k, co), subs) => SOME (k, Option.map (sgnSubCon (str, subs)) co))
| SgnError => SOME ((KError, ErrorMsg.dummySpan), SOME (CError, ErrorMsg.dummySpan))
| _ => NONE
fun projectDatatype env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
(case sgnSeek (fn SgiDatatype (x, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
| SgiDatatypeImp (x, _, _, _, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
| _ => NONE) sgis of
NONE => NONE
| SOME ((xs, xncs), subs) => SOME (xs,
map (fn (x, n, to) => (x, n, Option.map (sgnSubCon (str, subs)) to)) xncs))
| _ => NONE
fun projectConstructor env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
let
fun consider (n, xs, xncs) =
ListUtil.search (fn (x, n', to) =>
if x <> field then
NONE
else
SOME (U.classifyDatatype xncs, n', xs, to, (CNamed n, #2 str))) xncs
in
case sgnSeek (fn SgiDatatype (_, n, xs, xncs) => consider (n, xs, xncs)
| SgiDatatypeImp (_, n, _, _, _, xs, xncs) => consider (n, xs, xncs)
| _ => NONE) sgis of
NONE => NONE
| SOME ((dk, n, xs, to, t), subs) => SOME (dk, n, xs, Option.map (sgnSubCon (str, subs)) to,
sgnSubCon (str, subs) t)
end
| _ => NONE
fun projectVal env {sgn, str, field} =
case #1 (hnormSgn env sgn) of
SgnConst sgis =>
let
fun seek (n, xs, xncs) =
ListUtil.search (fn (x, _, to) =>
if x = field then
SOME (let
val base = (CNamed n, #2 sgn)
val nxs = length xs
val base = ListUtil.foldli (fn (i, _, base) =>
(CApp (base,
(CRel (nxs - i - 1), #2 sgn)),
#2 sgn))
base xs
val t =
case to of
NONE => base
| SOME t => (TFun (t, base), #2 sgn)
val k = (KType, #2 sgn)
in
foldr (fn (x, t) => (TCFun (Implicit, x, k, t), #2 sgn))
t xs
end)
else
NONE) xncs
in
case sgnSeek (fn SgiVal (x, _, c) => if x = field then SOME c else NONE
| SgiDatatype (_, n, xs, xncs) => seek (n, xs, xncs)
| SgiDatatypeImp (_, n, _, _, _, xs, xncs) => seek (n, xs, xncs)
| _ => NONE) sgis of
NONE => NONE
| SOME (c, subs) => SOME (sgnSubCon (str, subs) c)
end
| SgnError => SOME (CError, ErrorMsg.dummySpan)
| _ => NONE
fun sgnSeekConstraints (str, sgis) =
let
fun seek (sgis, sgns, strs, cons, acc) =
case sgis of
[] => acc
| (sgi, _) :: sgis =>
case sgi of
SgiConstraint (c1, c2) =>
let
val sub = sgnSubCon (str, (sgns, strs, cons))
in
seek (sgis, sgns, strs, cons, (sub c1, sub c2) :: acc)
end
| SgiConAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
| SgiCon (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
| SgiDatatype (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
| SgiDatatypeImp (x, n, _, _, _, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
| SgiVal _ => seek (sgis, sgns, strs, cons, acc)
| SgiSgn (x, n, _) => seek (sgis, IM.insert (sgns, n, x), strs, cons, acc)
| SgiStr (x, n, _) => seek (sgis, sgns, IM.insert (strs, n, x), cons, acc)
| SgiClassAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
| SgiClass (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
in
seek (sgis, IM.empty, IM.empty, IM.empty, [])
end
fun projectConstraints env {sgn, str} =
case #1 (hnormSgn env sgn) of
SgnConst sgis => SOME (sgnSeekConstraints (str, sgis))
| SgnError => SOME []
| _ => NONE
fun edeclBinds env (d, loc) =
case d of
EDVal (x, t, _) => pushERel env x t
| EDValRec vis => foldl (fn ((x, t, _), env) => pushERel env x t) env vis
fun declBinds env (d, loc) =
case d of
DCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
| DDatatype (x, n, xs, xncs) =>
let
val k = (KType, loc)
val nxs = length xs
val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
(KArrow (k, kb), loc)))
((CNamed n, loc), k) xs
val env = pushCNamedAs env x n kb NONE
val env = pushDatatype env n xs xncs
in
foldl (fn ((x', n', to), env) =>
let
val t =
case to of
NONE => tb
| SOME t => (TFun (t, tb), loc)
val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
in
pushENamedAs env x' n' t
end)
env xncs
end
| DDatatypeImp (x, n, m, ms, x', xs, xncs) =>
let
val t = (CModProj (m, ms, x'), loc)
val k = (KType, loc)
val nxs = length xs
val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
(KArrow (k, kb), loc)))
((CNamed n, loc), k) xs
val env = pushCNamedAs env x n kb (SOME t)
val env = pushDatatype env n xs xncs
in
foldl (fn ((x', n', to), env) =>
let
val t =
case to of
NONE => tb
| SOME t => (TFun (t, tb), loc)
val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
in
pushENamedAs env x' n' t
end)
env xncs
end
| DVal (x, n, t, _) => pushENamedAs env x n t
| DValRec vis => foldl (fn ((x, n, t, _), env) => pushENamedAs env x n t) env vis
| DSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
| DStr (x, n, sgn, _) => pushStrNamedAs env x n sgn
| DFfiStr (x, n, sgn) => pushStrNamedAs env x n sgn
| DConstraint _ => env
| DExport _ => env
| DTable (tn, x, n, c) =>
let
val t = (CApp ((CModProj (tn, [], "sql_table"), loc), c), loc)
in
pushENamedAs env x n t
end
| DSequence (tn, x, n) =>
let
val t = (CModProj (tn, [], "sql_sequence"), loc)
in
pushENamedAs env x n t
end
| DClass (x, n, k, c) =>
let
val k = (KArrow (k, (KType, loc)), loc)
val env = pushCNamedAs env x n k (SOME c)
in
pushClass env n
end
| DDatabase _ => env
| DCookie (tn, x, n, c) =>
let
val t = (CApp ((CModProj (tn, [], "cookie"), loc), c), loc)
in
pushENamedAs env x n t
end
fun patBinds env (p, loc) =
case p of
PWild => env
| PVar (x, t) => pushERel env x t
| PPrim _ => env
| PCon (_, _, _, NONE) => env
| PCon (_, _, _, SOME p) => patBinds env p
| PRecord xps => foldl (fn ((_, p, _), env) => patBinds env p) env xps
end
|