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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 CoreUtil :> CORE_UTIL = struct
open Core
structure S = Search
structure Kind = struct
open Order
fun compare ((k1, _), (k2, _)) =
case (k1, k2) of
(KType, KType) => EQUAL
| (KType, _) => LESS
| (_, KType) => GREATER
| (KArrow (d1, r1), KArrow (d2, r2)) => join (compare (d1, d2), fn () => compare (r1, r2))
| (KArrow _, _) => LESS
| (_, KArrow _) => GREATER
| (KName, KName) => EQUAL
| (KName, _) => LESS
| (_, KName) => GREATER
| (KRecord k1, KRecord k2) => compare (k1, k2)
| (KRecord _, _) => LESS
| (_, KRecord _) => GREATER
| (KUnit, KUnit) => EQUAL
| (KUnit, _) => LESS
| (_, KUnit) => GREATER
| (KTuple ks1, KTuple ks2) => joinL compare (ks1, ks2)
| (KTuple _, _) => LESS
| (_, KTuple _) => GREATER
| (KRel n1, KRel n2) => Int.compare (n1, n2)
| (KRel _, _) => LESS
| (_, KRel _) => GREATER
| (KFun (_, k1), KFun (_, k2)) => compare (k1, k2)
fun mapfoldB {kind = f, bind} =
let
fun mfk ctx k acc =
S.bindP (mfk' ctx k acc, f ctx)
and mfk' ctx (kAll as (k, loc)) =
case k of
KType => S.return2 kAll
| KArrow (k1, k2) =>
S.bind2 (mfk ctx k1,
fn k1' =>
S.map2 (mfk ctx k2,
fn k2' =>
(KArrow (k1', k2'), loc)))
| KName => S.return2 kAll
| KRecord k =>
S.map2 (mfk ctx k,
fn k' =>
(KRecord k', loc))
| KUnit => S.return2 kAll
| KTuple ks =>
S.map2 (ListUtil.mapfold (mfk ctx) ks,
fn ks' =>
(KTuple ks', loc))
| KRel _ => S.return2 kAll
| KFun (x, k) =>
S.map2 (mfk (bind (ctx, x)) k,
fn k' =>
(KFun (x, k'), loc))
in
mfk
end
fun mapfold fk =
mapfoldB {kind = fn () => fk,
bind = fn ((), _) => ()} ()
fun map f k =
case mapfold (fn k => fn () => S.Continue (f k, ())) k () of
S.Return () => raise Fail "CoreUtil.Kind.map"
| S.Continue (k, ()) => k
fun mapB {kind, bind} ctx k =
case mapfoldB {kind = fn ctx => fn k => fn () => S.Continue (kind ctx k, ()),
bind = bind} ctx k () of
S.Continue (k, ()) => k
| S.Return _ => raise Fail "CoreUtil.Kind.mapB: Impossible"
fun exists f k =
case mapfold (fn k => fn () =>
if f k then
S.Return ()
else
S.Continue (k, ())) k () of
S.Return _ => true
| S.Continue _ => false
end
structure Con = struct
open Order
fun compare ((c1, _), (c2, _)) =
case (c1, c2) of
(TFun (d1, r1), TFun (d2, r2)) => join (compare (d1, d2), fn () => compare (r1, r2))
| (TFun _, _) => LESS
| (_, TFun _) => GREATER
| (TCFun (x1, k1, r1), TCFun (x2, k2, r2)) =>
join (String.compare (x1, x2),
fn () => join (Kind.compare (k1, k2),
fn () => compare (r1, r2)))
| (TCFun _, _) => LESS
| (_, TCFun _) => GREATER
| (TRecord c1, TRecord c2) => compare (c1, c2)
| (TRecord _, _) => LESS
| (_, TRecord _) => GREATER
| (CRel n1, CRel n2) => Int.compare (n1, n2)
| (CRel _, _) => LESS
| (_, CRel _) => GREATER
| (CNamed n1, CNamed n2) => Int.compare (n1, n2)
| (CNamed _, _) => LESS
| (_, CNamed _) => GREATER
| (CFfi (m1, s1), CFfi (m2, s2)) => join (String.compare (m1, m2),
fn () => String.compare (s1, s2))
| (CFfi _, _) => LESS
| (_, CFfi _) => GREATER
| (CApp (f1, x1), CApp (f2, x2)) => join (compare (f1, f2),
fn () => compare (x1, x2))
| (CApp _, _) => LESS
| (_, CApp _) => GREATER
| (CAbs (x1, k1, b1), CAbs (x2, k2, b2)) =>
join (String.compare (x1, x2),
fn () => join (Kind.compare (k1, k2),
fn () => compare (b1, b2)))
| (CAbs _, _) => LESS
| (_, CAbs _) => GREATER
| (CName s1, CName s2) => String.compare (s1, s2)
| (CName _, _) => LESS
| (_, CName _) => GREATER
| (CRecord (k1, xvs1), CRecord (k2, xvs2)) =>
join (Kind.compare (k1, k2),
fn () =>
let
val sort = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
compare (x1, x2) = GREATER)
in
joinL (fn ((x1, v1), (x2, v2)) =>
join (compare (x1, x2),
fn () => compare (v1, v2))) (sort xvs1, sort xvs2)
end)
| (CRecord _, _) => LESS
| (_, CRecord _) => GREATER
| (CConcat (f1, s1), CConcat (f2, s2)) =>
join (compare (f1, f2),
fn () => compare (s1, s2))
| (CConcat _, _) => LESS
| (_, CConcat _) => GREATER
| (CMap (d1, r1), CMap (d2, r2)) =>
join (Kind.compare (d1, r2),
fn () => Kind.compare (r1, r2))
| (CMap _, _) => LESS
| (_, CMap _) => GREATER
| (CUnit, CUnit) => EQUAL
| (CUnit, _) => LESS
| (_, CUnit) => GREATER
| (CTuple cs1, CTuple cs2) => joinL compare (cs1, cs2)
| (CTuple _, _) => LESS
| (_, CTuple _) => GREATER
| (CProj (c1, n1), CProj (c2, n2)) => join (Int.compare (n1, n2),
fn () => compare (c1, c2))
| (CProj _, _) => LESS
| (_, CProj _) => GREATER
| (CKAbs (_, c1), CKAbs (_, c2)) => compare (c1, c2)
| (CKAbs _, _) => LESS
| (_, CKAbs _) => GREATER
| (CKApp (c1, k1), CKApp (c2, k2)) =>
join (compare (c1, c2),
fn () => Kind.compare (k1, k2))
| (CKApp _, _) => LESS
| (_, CKApp _) => GREATER
| (TKFun (_, c1), TKFun (_, c2)) => compare (c1, c2)
datatype binder =
RelK of string
| RelC of string * kind
| NamedC of string * int * kind * con option
fun mapfoldB {kind = fk, con = fc, bind} =
let
val mfk = Kind.mapfoldB {kind = fk, bind = fn (ctx, x) => bind (ctx, RelK x)}
fun mfc ctx c acc =
S.bindP (mfc' ctx c acc, fc ctx)
and mfc' ctx (cAll as (c, loc)) =
case c of
TFun (c1, c2) =>
S.bind2 (mfc ctx c1,
fn c1' =>
S.map2 (mfc ctx c2,
fn c2' =>
(TFun (c1', c2'), loc)))
| TCFun (x, k, c) =>
S.bind2 (mfk ctx k,
fn k' =>
S.map2 (mfc (bind (ctx, RelC (x, k))) c,
fn c' =>
(TCFun (x, k', c'), loc)))
| TRecord c =>
S.map2 (mfc ctx c,
fn c' =>
(TRecord c', loc))
| CRel _ => S.return2 cAll
| CNamed _ => S.return2 cAll
| CFfi _ => S.return2 cAll
| CApp (c1, c2) =>
S.bind2 (mfc ctx c1,
fn c1' =>
S.map2 (mfc ctx c2,
fn c2' =>
(CApp (c1', c2'), loc)))
| CAbs (x, k, c) =>
S.bind2 (mfk ctx k,
fn k' =>
S.map2 (mfc (bind (ctx, RelC (x, k))) c,
fn c' =>
(CAbs (x, k', c'), loc)))
| CName _ => S.return2 cAll
| CRecord (k, xcs) =>
S.bind2 (mfk ctx k,
fn k' =>
S.map2 (ListUtil.mapfold (fn (x, c) =>
S.bind2 (mfc ctx x,
fn x' =>
S.map2 (mfc ctx c,
fn c' =>
(x', c'))))
xcs,
fn xcs' =>
(CRecord (k', xcs'), loc)))
| CConcat (c1, c2) =>
S.bind2 (mfc ctx c1,
fn c1' =>
S.map2 (mfc ctx c2,
fn c2' =>
(CConcat (c1', c2'), loc)))
| CMap (k1, k2) =>
S.bind2 (mfk ctx k1,
fn k1' =>
S.map2 (mfk ctx k2,
fn k2' =>
(CMap (k1', k2'), loc)))
| CUnit => S.return2 cAll
| CTuple cs =>
S.map2 (ListUtil.mapfold (mfc ctx) cs,
fn cs' =>
(CTuple cs', loc))
| CProj (c, n) =>
S.map2 (mfc ctx c,
fn c' =>
(CProj (c', n), loc))
| CKAbs (x, c) =>
S.map2 (mfc (bind (ctx, RelK x)) c,
fn c' =>
(CKAbs (x, c'), loc))
| CKApp (c, k) =>
S.bind2 (mfc ctx c,
fn c' =>
S.map2 (mfk ctx k,
fn k' =>
(CKApp (c', k'), loc)))
| TKFun (x, c) =>
S.map2 (mfc (bind (ctx, RelK x)) c,
fn c' =>
(TKFun (x, c'), loc))
in
mfc
end
fun mapfold {kind = fk, con = fc} =
mapfoldB {kind = fn () => fk,
con = fn () => fc,
bind = fn ((), _) => ()} ()
fun map {kind, con} c =
case mapfold {kind = fn k => fn () => S.Continue (kind k, ()),
con = fn c => fn () => S.Continue (con c, ())} c () of
S.Return () => raise Fail "Core_util.Con.map"
| S.Continue (c, ()) => c
fun mapB {kind, con, bind} ctx c =
case mapfoldB {kind = fn ctx => fn k => fn () => S.Continue (kind ctx k, ()),
con = fn ctx => fn c => fn () => S.Continue (con ctx c, ()),
bind = bind} ctx c () of
S.Continue (c, ()) => c
| S.Return _ => raise Fail "CoreUtil.Con.mapB: Impossible"
fun fold {kind, con} s c =
case mapfold {kind = fn k => fn s => S.Continue (k, kind (k, s)),
con = fn c => fn s => S.Continue (c, con (c, s))} c s of
S.Continue (_, s) => s
| S.Return _ => raise Fail "CoreUtil.Con.fold: Impossible"
fun exists {kind, con} k =
case mapfold {kind = fn k => fn () =>
if kind k then
S.Return ()
else
S.Continue (k, ()),
con = fn c => fn () =>
if con c then
S.Return ()
else
S.Continue (c, ())} k () of
S.Return _ => true
| S.Continue _ => false
fun foldMap {kind, con} s c =
case mapfold {kind = fn k => fn s => S.Continue (kind (k, s)),
con = fn c => fn s => S.Continue (con (c, s))} c s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.Con.foldMap: Impossible"
end
structure Exp = struct
open Order
fun pcCompare (pc1, pc2) =
case (pc1, pc2) of
(PConVar n1, PConVar n2) => Int.compare (n1, n2)
| (PConVar _, _) => LESS
| (_, PConVar _) => GREATER
| (PConFfi {mod = m1, datatyp = d1, con = c1, ...},
PConFfi {mod = m2, datatyp = d2, con = c2, ...}) =>
join (String.compare (m1, m2),
fn () => join (String.compare (d1, d2),
fn () => String.compare (c1, c2)))
fun pCompare ((p1, _), (p2, _)) =
case (p1, p2) of
(PWild, PWild) => EQUAL
| (PWild, _) => LESS
| (_, PWild) => GREATER
| (PVar _, PVar _) => EQUAL
| (PVar _, _) => LESS
| (_, PVar _) => GREATER
| (PPrim p1, PPrim p2) => Prim.compare (p1, p2)
| (PPrim _, _) => LESS
| (_, PPrim _) => GREATER
| (PCon (_, pc1, _, po1), PCon (_, pc2, _, po2)) =>
join (pcCompare (pc1, pc2),
fn () => joinO pCompare (po1, po2))
| (PCon _, _) => LESS
| (_, PCon _) => GREATER
| (PRecord xps1, PRecord xps2) =>
joinL (fn ((x1, p1, _), (x2, p2, _)) =>
join (String.compare (x1, x2),
fn () => pCompare (p1, p2))) (xps1, xps2)
fun compare ((e1, _), (e2, _)) =
case (e1, e2) of
(EPrim p1, EPrim p2) => Prim.compare (p1, p2)
| (EPrim _, _) => LESS
| (_, EPrim _) => GREATER
| (ERel n1, ERel n2) => Int.compare (n1, n2)
| (ERel _, _) => LESS
| (_, ERel _) => GREATER
| (ENamed n1, ENamed n2) => Int.compare (n1, n2)
| (ENamed _, _) => LESS
| (_, ENamed _) => GREATER
| (ECon (_, pc1, _, eo1), ECon (_, pc2, _, eo2)) =>
join (pcCompare (pc1, pc2),
fn () => joinO compare (eo1, eo2))
| (ECon _, _) => LESS
| (_, ECon _) => GREATER
| (EFfi (f1, x1), EFfi (f2, x2)) =>
join (String.compare (f1, f2),
fn () => String.compare (x1, x2))
| (EFfi _, _) => LESS
| (_, EFfi _) => GREATER
| (EFfiApp (f1, x1, es1), EFfiApp (f2, x2, es2)) =>
join (String.compare (f1, f2),
fn () => join (String.compare (x1, x2),
fn () => joinL compare (es1, es2)))
| (EFfiApp _, _) => LESS
| (_, EFfiApp _) => GREATER
| (EApp (f1, x1), EApp (f2, x2)) =>
join (compare (f1, f2),
fn () => compare (x1, x2))
| (EApp _, _) => LESS
| (_, EApp _) => GREATER
| (EAbs (_, _, _, e1), EAbs (_, _, _, e2)) => compare (e1, e2)
| (EAbs _, _) => LESS
| (_, EAbs _) => GREATER
| (ECApp (f1, x1), ECApp (f2, x2)) =>
join (compare (f1, f2),
fn () => Con.compare (x1, x2))
| (ECApp _, _) => LESS
| (_, ECApp _) => GREATER
| (ECAbs (_, _, e1), ECAbs (_, _, e2)) => compare (e1, e2)
| (ECAbs _, _) => LESS
| (_, ECAbs _) => GREATER
| (ERecord xes1, ERecord xes2) =>
joinL (fn ((x1, e1, _), (x2, e2, _)) =>
join (Con.compare (x1, x2),
fn () => compare (e1, e2))) (xes1, xes2)
| (ERecord _, _) => LESS
| (_, ERecord _) => GREATER
| (EField (e1, c1, _), EField (e2, c2, _)) =>
join (compare (e1, e2),
fn () => Con.compare (c1, c2))
| (EField _, _) => LESS
| (_, EField _) => GREATER
| (EConcat (x1, _, y1, _), EConcat (x2, _, y2, _)) =>
join (compare (x1, x2),
fn () => compare (y1, y2))
| (EConcat _, _) => LESS
| (_, EConcat _) => GREATER
| (ECut (e1, c1, _), ECut (e2, c2, _)) =>
join (compare (e1, e2),
fn () => Con.compare (c1, c2))
| (ECut _, _) => LESS
| (_, ECut _) => GREATER
| (ECutMulti (e1, c1, _), ECutMulti (e2, c2, _)) =>
join (compare (e1, e2),
fn () => Con.compare (c1, c2))
| (ECutMulti _, _) => LESS
| (_, ECutMulti _) => GREATER
| (ECase (e1, pes1, _), ECase (e2, pes2, _)) =>
join (compare (e1, e2),
fn () => joinL (fn ((p1, e1), (p2, e2)) =>
join (pCompare (p1, p2),
fn () => compare (e1, e2))) (pes1, pes2))
| (ECase _, _) => LESS
| (_, ECase _) => GREATER
| (EWrite e1, EWrite e2) => compare (e1, e2)
| (EWrite _, _) => LESS
| (_, EWrite _) => GREATER
| (EClosure (n1, es1), EClosure (n2, es2)) =>
join (Int.compare (n1, n2),
fn () => joinL compare (es1, es2))
| (EClosure _, _) => LESS
| (_, EClosure _) => GREATER
| (ELet (_, _, x1, e1), ELet (_, _, x2, e2)) =>
join (compare (x1, x2),
fn () => compare (e1, e2))
| (ELet _, _) => LESS
| (_, ELet _) => GREATER
| (EServerCall (n1, es1, e1, _), EServerCall (n2, es2, e2, _)) =>
join (Int.compare (n1, n2),
fn () => join (joinL compare (es1, es2),
fn () => compare (e1, e2)))
| (EServerCall _, _) => LESS
| (_, EServerCall _) => GREATER
| (EKAbs (_, e1), EKAbs (_, e2)) => compare (e1, e2)
| (EKAbs _, _) => LESS
| (_, EKAbs _) => GREATER
| (EKApp (e1, k1), EKApp (e2, k2)) =>
join (compare (e1, e2),
fn () => Kind.compare (k1, k2))
datatype binder =
RelK of string
| RelC of string * kind
| NamedC of string * int * kind * con option
| RelE of string * con
| NamedE of string * int * con * exp option * string
fun mapfoldB {kind = fk, con = fc, exp = fe, bind} =
let
val mfk = Kind.mapfoldB {kind = fk, bind = fn (ctx, x) => bind (ctx, RelK x)}
fun bind' (ctx, b) =
let
val b' = case b of
Con.RelK x => RelK x
| Con.RelC x => RelC x
| Con.NamedC x => NamedC x
in
bind (ctx, b')
end
val mfc = Con.mapfoldB {kind = fk, con = fc, bind = bind'}
fun mfe ctx e acc =
S.bindP (mfe' ctx e acc, fe ctx)
and mfe' ctx (eAll as (e, loc)) =
case e of
EPrim _ => S.return2 eAll
| ERel _ => S.return2 eAll
| ENamed _ => S.return2 eAll
| ECon (dk, pc, cs, NONE) =>
S.map2 (ListUtil.mapfold (mfc ctx) cs,
fn cs' =>
(ECon (dk, pc, cs', NONE), loc))
| ECon (dk, n, cs, SOME e) =>
S.bind2 (mfe ctx e,
fn e' =>
S.map2 (ListUtil.mapfold (mfc ctx) cs,
fn cs' =>
(ECon (dk, n, cs', SOME e'), loc)))
| EFfi _ => S.return2 eAll
| EFfiApp (m, x, es) =>
S.map2 (ListUtil.mapfold (mfe ctx) es,
fn es' =>
(EFfiApp (m, x, es'), loc))
| EApp (e1, e2) =>
S.bind2 (mfe ctx e1,
fn e1' =>
S.map2 (mfe ctx e2,
fn e2' =>
(EApp (e1', e2'), loc)))
| EAbs (x, dom, ran, e) =>
S.bind2 (mfc ctx dom,
fn dom' =>
S.bind2 (mfc ctx ran,
fn ran' =>
S.map2 (mfe (bind (ctx, RelE (x, dom'))) e,
fn e' =>
(EAbs (x, dom', ran', e'), loc))))
| ECApp (e, c) =>
S.bind2 (mfe ctx e,
fn e' =>
S.map2 (mfc ctx c,
fn c' =>
(ECApp (e', c'), loc)))
| ECAbs (x, k, e) =>
S.bind2 (mfk ctx k,
fn k' =>
S.map2 (mfe (bind (ctx, RelC (x, k))) e,
fn e' =>
(ECAbs (x, k', e'), loc)))
| ERecord xes =>
S.map2 (ListUtil.mapfold (fn (x, e, t) =>
S.bind2 (mfc ctx x,
fn x' =>
S.bind2 (mfe ctx e,
fn e' =>
S.map2 (mfc ctx t,
fn t' =>
(x', e', t')))))
xes,
fn xes' =>
(ERecord xes', loc))
| EField (e, c, {field, rest}) =>
S.bind2 (mfe ctx e,
fn e' =>
S.bind2 (mfc ctx c,
fn c' =>
S.bind2 (mfc ctx field,
fn field' =>
S.map2 (mfc ctx rest,
fn rest' =>
(EField (e', c', {field = field', rest = rest'}), loc)))))
| EConcat (e1, c1, e2, c2) =>
S.bind2 (mfe ctx e1,
fn e1' =>
S.bind2 (mfc ctx c1,
fn c1' =>
S.bind2 (mfe ctx e2,
fn e2' =>
S.map2 (mfc ctx c2,
fn c2' =>
(EConcat (e1', c1', e2', c2'),
loc)))))
| ECut (e, c, {field, rest}) =>
S.bind2 (mfe ctx e,
fn e' =>
S.bind2 (mfc ctx c,
fn c' =>
S.bind2 (mfc ctx field,
fn field' =>
S.map2 (mfc ctx rest,
fn rest' =>
(ECut (e', c', {field = field', rest = rest'}), loc)))))
| ECutMulti (e, c, {rest}) =>
S.bind2 (mfe ctx e,
fn e' =>
S.bind2 (mfc ctx c,
fn c' =>
S.map2 (mfc ctx rest,
fn rest' =>
(ECutMulti (e', c', {rest = rest'}), loc))))
| ECase (e, pes, {disc, result}) =>
S.bind2 (mfe ctx e,
fn e' =>
S.bind2 (ListUtil.mapfold (fn (p, e) =>
let
fun pb ((p, _), ctx) =
case p of
PWild => ctx
| PVar (x, t) => bind (ctx, RelE (x, t))
| PPrim _ => ctx
| PCon (_, _, _, NONE) => ctx
| PCon (_, _, _, SOME p) => pb (p, ctx)
| PRecord xps => foldl (fn ((_, p, _), ctx) =>
pb (p, ctx)) ctx xps
in
S.bind2 (mfp ctx p,
fn p' =>
S.map2 (mfe (pb (p', ctx)) e,
fn e' => (p', e')))
end) pes,
fn pes' =>
S.bind2 (mfc ctx disc,
fn disc' =>
S.map2 (mfc ctx result,
fn result' =>
(ECase (e', pes', {disc = disc', result = result'}), loc)))))
| EWrite e =>
S.map2 (mfe ctx e,
fn e' =>
(EWrite e', loc))
| EClosure (n, es) =>
S.map2 (ListUtil.mapfold (mfe ctx) es,
fn es' =>
(EClosure (n, es'), loc))
| ELet (x, t, e1, e2) =>
S.bind2 (mfc ctx t,
fn t' =>
S.bind2 (mfe ctx e1,
fn e1' =>
S.map2 (mfe (bind (ctx, RelE (x, t'))) e2,
fn e2' =>
(ELet (x, t', e1', e2'), loc))))
| EServerCall (n, es, e, t) =>
S.bind2 (ListUtil.mapfold (mfe ctx) es,
fn es' =>
S.bind2 (mfe ctx e,
fn e' =>
S.map2 (mfc ctx t,
fn t' =>
(EServerCall (n, es', e', t'), loc))))
| EKAbs (x, e) =>
S.map2 (mfe (bind (ctx, RelK x)) e,
fn e' =>
(EKAbs (x, e'), loc))
| EKApp (e, k) =>
S.bind2 (mfe ctx e,
fn e' =>
S.map2 (mfk ctx k,
fn k' =>
(EKApp (e', k'), loc)))
and mfp ctx (pAll as (p, loc)) =
case p of
PWild => S.return2 pAll
| PVar (x, t) =>
S.map2 (mfc ctx t,
fn t' =>
(PVar (x, t'), loc))
| PPrim _ => S.return2 pAll
| PCon (dk, pc, args, po) =>
S.bind2 (mfpc ctx pc,
fn pc' =>
S.bind2 (ListUtil.mapfold (mfc ctx) args,
fn args' =>
S.map2 ((case po of
NONE => S.return2 NONE
| SOME p => S.map2 (mfp ctx p, SOME)),
fn po' =>
(PCon (dk, pc', args', po'), loc))))
| PRecord xps =>
S.map2 (ListUtil.mapfold (fn (x, p, c) =>
S.bind2 (mfp ctx p,
fn p' =>
S.map2 (mfc ctx c,
fn c' =>
(x, p', c')))) xps,
fn xps' =>
(PRecord xps', loc))
and mfpc ctx pc =
case pc of
PConVar _ => S.return2 pc
| PConFfi {mod = m, datatyp, params, con, arg, kind} =>
S.map2 ((case arg of
NONE => S.return2 NONE
| SOME c => S.map2 (mfc ctx c, SOME)),
fn arg' =>
PConFfi {mod = m, datatyp = datatyp, params = params,
con = con, arg = arg', kind = kind})
in
mfe
end
fun mapfold {kind = fk, con = fc, exp = fe} =
mapfoldB {kind = fn () => fk,
con = fn () => fc,
exp = fn () => fe,
bind = fn ((), _) => ()} ()
fun mapB {kind, con, exp, bind} ctx e =
case mapfoldB {kind = fn ctx => fn k => fn () => S.Continue (kind ctx k, ()),
con = fn ctx => fn c => fn () => S.Continue (con ctx c, ()),
exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
bind = bind} ctx e () of
S.Continue (e, ()) => e
| S.Return _ => raise Fail "CoreUtil.Exp.mapB: Impossible"
fun map {kind, con, exp} e =
case mapfold {kind = fn k => fn () => S.Continue (kind k, ()),
con = fn c => fn () => S.Continue (con c, ()),
exp = fn e => fn () => S.Continue (exp e, ())} e () of
S.Return () => raise Fail "Core_util.Exp.map"
| S.Continue (e, ()) => e
fun fold {kind, con, exp} s e =
case mapfold {kind = fn k => fn s => S.Continue (k, kind (k, s)),
con = fn c => fn s => S.Continue (c, con (c, s)),
exp = fn e => fn s => S.Continue (e, exp (e, s))} e s of
S.Continue (_, s) => s
| S.Return _ => raise Fail "CoreUtil.Exp.fold: Impossible"
fun foldB {kind, con, exp, bind} ctx s e =
case mapfoldB {kind = fn ctx => fn k => fn s => S.Continue (k, kind (ctx, k, s)),
con = fn ctx => fn c => fn s => S.Continue (c, con (ctx, c, s)),
exp = fn ctx => fn e => fn s => S.Continue (e, exp (ctx, e, s)),
bind = bind} ctx e s of
S.Continue (_, s) => s
| S.Return _ => raise Fail "CoreUtil.Exp.foldB: Impossible"
fun exists {kind, con, exp} k =
case mapfold {kind = fn k => fn () =>
if kind k then
S.Return ()
else
S.Continue (k, ()),
con = fn c => fn () =>
if con c then
S.Return ()
else
S.Continue (c, ()),
exp = fn e => fn () =>
if exp e then
S.Return ()
else
S.Continue (e, ())} k () of
S.Return _ => true
| S.Continue _ => false
fun existsB {kind, con, exp, bind} ctx k =
case mapfoldB {kind = fn ctx => fn k => fn () =>
if kind (ctx, k) then
S.Return ()
else
S.Continue (k, ()),
con = fn ctx => fn c => fn () =>
if con (ctx, c) then
S.Return ()
else
S.Continue (c, ()),
exp = fn ctx => fn e => fn () =>
if exp (ctx, e) then
S.Return ()
else
S.Continue (e, ()),
bind = bind} ctx k () of
S.Return _ => true
| S.Continue _ => false
fun foldMap {kind, con, exp} s e =
case mapfold {kind = fn k => fn s => S.Continue (kind (k, s)),
con = fn c => fn s => S.Continue (con (c, s)),
exp = fn e => fn s => S.Continue (exp (e, s))} e s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.Exp.foldMap: Impossible"
fun foldMapB {kind, con, exp, bind} ctx s e =
case mapfoldB {kind = fn ctx => fn k => fn s => S.Continue (kind (ctx, k, s)),
con = fn ctx => fn c => fn s => S.Continue (con (ctx, c, s)),
exp = fn ctx => fn e => fn s => S.Continue (exp (ctx, e, s)),
bind = bind} ctx e s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.Exp.foldMapB: Impossible"
end
structure Decl = struct
datatype binder = datatype Exp.binder
fun mapfoldB {kind = fk, con = fc, exp = fe, decl = fd, bind} =
let
val mfk = Kind.mapfoldB {kind = fk, bind = fn (ctx, x) => bind (ctx, RelK x)}
fun bind' (ctx, b) =
let
val b' = case b of
Con.RelK x => RelK x
| Con.RelC x => RelC x
| Con.NamedC x => NamedC x
in
bind (ctx, b')
end
val mfc = Con.mapfoldB {kind = fk, con = fc, bind = bind'}
val mfe = Exp.mapfoldB {kind = fk, con = fc, exp = fe, bind = bind}
fun mfd ctx d acc =
S.bindP (mfd' ctx d acc, fd ctx)
and mfd' ctx (dAll as (d, loc)) =
case d of
DCon (x, n, k, c) =>
S.bind2 (mfk ctx k,
fn k' =>
S.map2 (mfc ctx c,
fn c' =>
(DCon (x, n, k', c'), loc)))
| DDatatype (x, n, xs, xncs) =>
let
val k = (KType, loc)
val k' = foldl (fn (_, k') => (KArrow (k, k'), loc)) k xs
val ctx' = bind (ctx, NamedC (x, n, k', NONE))
in
S.map2 (ListUtil.mapfold (fn (x, n, c) =>
case c of
NONE => S.return2 (x, n, c)
| SOME c =>
S.map2 (mfc ctx' c,
fn c' => (x, n, SOME c'))) xncs,
fn xncs' =>
(DDatatype (x, n, xs, xncs'), loc))
end
| DVal vi =>
S.map2 (mfvi ctx vi,
fn vi' =>
(DVal vi', loc))
| DValRec vis =>
let
val ctx = foldl (fn ((x, n, t, e, s), ctx) => bind (ctx, NamedE (x, n, t, NONE, s)))
ctx vis
in
S.map2 (ListUtil.mapfold (mfvi ctx) vis,
fn vis' =>
(DValRec vis', loc))
end
| DExport _ => S.return2 dAll
| DTable (x, n, c, s) =>
S.map2 (mfc ctx c,
fn c' =>
(DTable (x, n, c', s), loc))
| DSequence _ => S.return2 dAll
| DDatabase _ => S.return2 dAll
| DCookie (x, n, c, s) =>
S.map2 (mfc ctx c,
fn c' =>
(DCookie (x, n, c', s), loc))
and mfvi ctx (x, n, t, e, s) =
S.bind2 (mfc ctx t,
fn t' =>
S.map2 (mfe ctx e,
fn e' =>
(x, n, t', e', s)))
in
mfd
end
fun mapfold {kind = fk, con = fc, exp = fe, decl = fd} =
mapfoldB {kind = fn () => fk,
con = fn () => fc,
exp = fn () => fe,
decl = fn () => fd,
bind = fn ((), _) => ()} ()
fun fold {kind, con, exp, decl} s d =
case mapfold {kind = fn k => fn s => S.Continue (k, kind (k, s)),
con = fn c => fn s => S.Continue (c, con (c, s)),
exp = fn e => fn s => S.Continue (e, exp (e, s)),
decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
S.Continue (_, s) => s
| S.Return _ => raise Fail "CoreUtil.Decl.fold: Impossible"
fun foldMap {kind, con, exp, decl} s d =
case mapfold {kind = fn k => fn s => S.Continue (kind (k, s)),
con = fn c => fn s => S.Continue (con (c, s)),
exp = fn e => fn s => S.Continue (exp (e, s)),
decl = fn d => fn s => S.Continue (decl (d, s))} d s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.Decl.foldMap: Impossible"
fun foldMapB {kind, con, exp, decl, bind} ctx s d =
case mapfoldB {kind = fn ctx => fn k => fn s => S.Continue (kind (ctx, k, s)),
con = fn ctx => fn c => fn s => S.Continue (con (ctx, c, s)),
exp = fn ctx => fn e => fn s => S.Continue (exp (ctx, e, s)),
decl = fn ctx => fn d => fn s => S.Continue (decl (ctx, d, s)),
bind = bind} ctx d s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.Decl.foldMapB: Impossible"
fun exists {kind, con, exp, decl} d =
case mapfold {kind = fn k => fn () =>
if kind k then
S.Return ()
else
S.Continue (k, ()),
con = fn c => fn () =>
if con c then
S.Return ()
else
S.Continue (c, ()),
exp = fn e => fn () =>
if exp e then
S.Return ()
else
S.Continue (e, ()),
decl = fn d => fn () =>
if decl d then
S.Return ()
else
S.Continue (d, ())} d () of
S.Return _ => true
| S.Continue _ => false
end
structure File = struct
datatype binder = datatype Exp.binder
fun mapfoldB (all as {bind, ...}) =
let
val mfd = Decl.mapfoldB all
fun mff ctx ds =
case ds of
nil => S.return2 nil
| d :: ds' =>
S.bind2 (mfd ctx d,
fn d' =>
let
val ctx' =
case #1 d' of
DCon (x, n, k, c) => bind (ctx, NamedC (x, n, k, SOME c))
| DDatatype (x, n, xs, xncs) =>
let
val loc = #2 d'
val k = (KType, loc)
val k' = foldl (fn (_, k') => (KArrow (k, k'), loc)) k xs
val ctx = bind (ctx, NamedC (x, n, k', NONE))
val t = (CNamed n, #2 d')
val t = ListUtil.foldli (fn (i, _, t) => (CApp (t, (CRel i, loc)), loc))
t xs
in
foldl (fn ((x, n, to), ctx) =>
let
val t = case to of
NONE => t
| SOME t' => (TFun (t', t), #2 d')
val t = foldr (fn (x, t) => (TCFun (x, k, t), loc))
t xs
in
bind (ctx, NamedE (x, n, t, NONE, ""))
end)
ctx xncs
end
| DVal (x, n, t, e, s) => bind (ctx, NamedE (x, n, t, SOME e, s))
| DValRec vis =>
foldl (fn ((x, n, t, e, s), ctx) => bind (ctx, NamedE (x, n, t, NONE, s)))
ctx vis
| DExport _ => ctx
| DTable (x, n, c, s) =>
let
val t = (CApp ((CFfi ("Basis", "sql_table"), #2 d'), c), #2 d')
in
bind (ctx, NamedE (x, n, t, NONE, s))
end
| DSequence (x, n, s) =>
let
val t = (CFfi ("Basis", "sql_sequence"), #2 d')
in
bind (ctx, NamedE (x, n, t, NONE, s))
end
| DDatabase _ => ctx
| DCookie (x, n, c, s) =>
let
val t = (CApp ((CFfi ("Basis", "http_cookie"), #2 d'), c), #2 d')
in
bind (ctx, NamedE (x, n, t, NONE, s))
end
in
S.map2 (mff ctx' ds',
fn ds' =>
d' :: ds')
end)
in
mff
end
fun mapfold {kind = fk, con = fc, exp = fe, decl = fd} =
mapfoldB {kind = fn () => fk,
con = fn () => fc,
exp = fn () => fe,
decl = fn () => fd,
bind = fn ((), _) => ()} ()
fun mapB {kind, con, exp, decl, bind} ctx ds =
case mapfoldB {kind = fn ctx => fn k => fn () => S.Continue (kind ctx k, ()),
con = fn ctx => fn c => fn () => S.Continue (con ctx c, ()),
exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
decl = fn ctx => fn d => fn () => S.Continue (decl ctx d, ()),
bind = bind} ctx ds () of
S.Continue (ds, ()) => ds
| S.Return _ => raise Fail "CoreUtil.File.mapB: Impossible"
fun map {kind, con, exp, decl} ds =
mapB {kind = fn () => kind,
con = fn () => con,
exp = fn () => exp,
decl = fn () => decl,
bind = fn _ => ()} () ds
fun fold {kind, con, exp, decl} s d =
case mapfold {kind = fn k => fn s => S.Continue (k, kind (k, s)),
con = fn c => fn s => S.Continue (c, con (c, s)),
exp = fn e => fn s => S.Continue (e, exp (e, s)),
decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
S.Continue (_, s) => s
| S.Return _ => raise Fail "CoreUtil.File.fold: Impossible"
fun foldMap {kind, con, exp, decl} s d =
case mapfold {kind = fn k => fn s => S.Continue (kind (k, s)),
con = fn c => fn s => S.Continue (con (c, s)),
exp = fn e => fn s => S.Continue (exp (e, s)),
decl = fn d => fn s => S.Continue (decl (d, s))} d s of
S.Continue v => v
| S.Return _ => raise Fail "CoreUtil.File.foldMap: Impossible"
val maxName = foldl (fn ((d, _) : decl, count) =>
case d of
DCon (_, n, _, _) => Int.max (n, count)
| DDatatype (_, n, _, ns) =>
foldl (fn ((_, n', _), m) => Int.max (n', m))
(Int.max (n, count)) ns
| DVal (_, n, _, _, _) => Int.max (n, count)
| DValRec vis => foldl (fn ((_, n, _, _, _), count) => Int.max (n, count)) count vis
| DExport _ => count
| DTable (_, n, _, _) => Int.max (n, count)
| DSequence (_, n, _) => Int.max (n, count)
| DDatabase _ => count
| DCookie (_, n, _, _) => Int.max (n, count)) 0
end
end
|