Mercurial > urweb
view src/elab_util.sml @ 1341:91eaa1542c5a
Smarter record unification
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Wed, 15 Dec 2010 09:37:36 -0500 |
| parents | c7b9a33c26c8 |
| children | 9e0fa4f6ac93 |
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(* Copyright (c) 2008-2010, 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 ElabUtil :> ELAB_UTIL = struct open Elab fun classifyDatatype xncs = case xncs of [(_, _, NONE), (_, _, SOME _)] => Option | [(_, _, SOME _), (_, _, NONE)] => Option | _ => if List.all (fn (_, _, NONE) => true | _ => false) xncs then Enum else Default structure S = Search structure Kind = struct fun mapfoldB {kind, bind} = let fun mfk ctx k acc = S.bindP (mfk' ctx k acc, kind 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)) | KError => S.return2 kAll | KUnif (_, _, ref (SOME k)) => mfk' ctx k | KUnif _ => S.return2 kAll | KTupleUnif (_, _, ref (SOME k)) => mfk' ctx k | KTupleUnif (loc, nks, r) => S.map2 (ListUtil.mapfold (fn (n, k) => S.map2 (mfk ctx k, fn k' => (n, k'))) nks, fn nks' => (KTupleUnif (loc, nks', r), 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 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 "ElabUtil.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 val mliftConInCon = ref (fn n : int => fn c : con => (raise Fail "You didn't set ElabUtil.mliftConInCon!") : con) structure Con = struct datatype binder = RelK of string | RelC of string * Elab.kind | NamedC of string * int * Elab.kind * Elab.con option fun mapfoldB {kind = fk, con = fc, bind} = let val mfk = Kind.mapfoldB {kind = fk, bind = fn (ctx, s) => bind (ctx, RelK s)} 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 (e, x, k, c) => S.bind2 (mfk ctx k, fn k' => S.map2 (mfc (bind (ctx, RelC (x, k))) c, fn c' => (TCFun (e, x, k', c'), loc))) | TDisjoint (c1, c2, c3) => S.bind2 (mfc ctx c1, fn c1' => S.bind2 (mfc ctx c2, fn c2' => S.map2 (mfc ctx c3, fn c3' => (TDisjoint (c1', c2', c3'), loc)))) | TRecord c => S.map2 (mfc ctx c, fn c' => (TRecord c', loc)) | CRel _ => S.return2 cAll | CNamed _ => S.return2 cAll | CModProj _ => 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)) | CError => S.return2 cAll | CUnif (nl, _, _, _, ref (SOME c)) => mfc' ctx (!mliftConInCon nl c) | CUnif _ => S.return2 cAll | 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 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 "ElabUtil.Con.mapB: Impossible" fun map {kind, con} s = case mapfold {kind = fn k => fn () => S.Continue (kind k, ()), con = fn c => fn () => S.Continue (con c, ())} s () of S.Return () => raise Fail "ElabUtil.Con.map: Impossible" | S.Continue (s, ()) => s fun existsB {kind, con, bind} ctx c = 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, ()), bind = bind} ctx c () of S.Return _ => true | S.Continue _ => false fun exists {kind, con} c = 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, ())} c () of S.Return _ => true | S.Continue _ => false fun foldB {kind, con, bind} ctx st c = case mapfoldB {kind = fn ctx => fn k => fn st => S.Continue (k, kind (ctx, k, st)), con = fn ctx => fn c => fn st => S.Continue (c, con (ctx, c, st)), bind = bind} ctx c st of S.Continue (_, st) => st | S.Return _ => raise Fail "ElabUtil.Con.foldB: Impossible" fun fold {kind, con} st c = case mapfoldB {kind = fn () => fn k => fn st => S.Continue (k, kind (k, st)), con = fn () => fn c => fn st => S.Continue (c, con (c, st)), bind = fn ((), _) => ()} () c st of S.Continue (_, st) => st | S.Return _ => raise Fail "ElabUtil.Con.fold: Impossible" end structure Exp = struct datatype binder = RelK of string | RelC of string * Elab.kind | NamedC of string * int * Elab.kind * Elab.con option | RelE of string * Elab.con | NamedE of string * Elab.con 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 doVars ((p, _), ctx) = case p of PWild => ctx | PVar xt => bind (ctx, RelE xt) | PPrim _ => ctx | PCon (_, _, _, NONE) => ctx | PCon (_, _, _, SOME p) => doVars (p, ctx) | PRecord xpcs => foldl (fn ((_, p, _), ctx) => doVars (p, ctx)) ctx xpcs 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 | EModProj _ => S.return2 eAll | 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 (expl, x, k, e) => S.bind2 (mfk ctx k, fn k' => S.map2 (mfe (bind (ctx, RelC (x, k))) e, fn e' => (ECAbs (expl, 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))))) | EError => S.return2 eAll | EUnif (ref (SOME e)) => mfe ctx e | EUnif _ => S.return2 eAll | ELet (des, e, t) => let val (des, ctx') = foldl (fn (ed, (des, ctx)) => let val ctx' = case #1 ed of EDVal (p, _, _) => doVars (p, ctx) | EDValRec vis => foldl (fn ((x, t, _), ctx) => bind (ctx, RelE (x, t))) ctx vis in (S.bind2 (des, fn des' => S.map2 (mfed ctx ed, fn ed' => ed' :: des')), ctx') end) (S.return2 [], ctx) des in S.bind2 (des, fn des' => S.bind2 (mfe ctx' e, fn e' => S.map2 (mfc ctx t, fn t' => (ELet (rev des', e', t'), loc)))) end | 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 (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 mfed ctx (dAll as (d, loc)) = case d of EDVal (p, t, e) => S.bind2 (mfc ctx t, fn t' => S.map2 (mfe ctx e, fn e' => (EDVal (p, t', e'), loc))) | EDValRec vis => let val ctx = foldl (fn ((x, t, _), ctx) => bind (ctx, RelE (x, t))) ctx vis in S.map2 (ListUtil.mapfold (mfvi ctx) vis, fn vis' => (EDValRec vis', loc)) end and mfvi ctx (x, c, e) = S.bind2 (mfc ctx c, fn c' => S.map2 (mfe ctx e, fn e' => (x, c', e'))) in mfe end fun mapfold {kind = fk, con = fc, exp = fe} = mapfoldB {kind = fn () => fk, con = fn () => fc, exp = fn () => fe, bind = fn ((), _) => ()} () 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 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 "ElabUtil.Exp.mapB: Impossible" fun foldB {kind, con, exp, bind} ctx st e = case mapfoldB {kind = fn ctx => fn k => fn st => S.Continue (k, kind (ctx, k, st)), con = fn ctx => fn c => fn st => S.Continue (c, con (ctx, c, st)), exp = fn ctx => fn e => fn st => S.Continue (e, exp (ctx, e, st)), bind = bind} ctx e st of S.Continue (_, st) => st | S.Return _ => raise Fail "ElabUtil.Exp.foldB: Impossible" end structure Sgn = struct datatype binder = RelK of string | RelC of string * Elab.kind | NamedC of string * int * Elab.kind * Elab.con option | Str of string * int * Elab.sgn | Sgn of string * int * Elab.sgn fun mapfoldB {kind, con, sgn_item, sgn, bind} = let 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 con = Con.mapfoldB {kind = kind, con = con, bind = bind'} val kind = Kind.mapfoldB {kind = kind, bind = fn (ctx, x) => bind (ctx, RelK x)} fun sgi ctx si acc = S.bindP (sgi' ctx si acc, sgn_item ctx) and sgi' ctx (siAll as (si, loc)) = case si of SgiConAbs (x, n, k) => S.map2 (kind ctx k, fn k' => (SgiConAbs (x, n, k'), loc)) | SgiCon (x, n, k, c) => S.bind2 (kind ctx k, fn k' => S.map2 (con ctx c, fn c' => (SgiCon (x, n, k', c'), loc))) | SgiDatatype dts => S.map2 (ListUtil.mapfold (fn (x, n, xs, xncs) => S.map2 (ListUtil.mapfold (fn (x, n, c) => case c of NONE => S.return2 (x, n, c) | SOME c => S.map2 (con ctx c, fn c' => (x, n, SOME c'))) xncs, fn xncs' => (x, n, xs, xncs'))) dts, fn dts' => (SgiDatatype dts', loc)) | SgiDatatypeImp (x, n, m1, ms, s, xs, xncs) => S.map2 (ListUtil.mapfold (fn (x, n, c) => case c of NONE => S.return2 (x, n, c) | SOME c => S.map2 (con ctx c, fn c' => (x, n, SOME c'))) xncs, fn xncs' => (SgiDatatypeImp (x, n, m1, ms, s, xs, xncs'), loc)) | SgiVal (x, n, c) => S.map2 (con ctx c, fn c' => (SgiVal (x, n, c'), loc)) | SgiStr (x, n, s) => S.map2 (sg ctx s, fn s' => (SgiStr (x, n, s'), loc)) | SgiSgn (x, n, s) => S.map2 (sg ctx s, fn s' => (SgiSgn (x, n, s'), loc)) | SgiConstraint (c1, c2) => S.bind2 (con ctx c1, fn c1' => S.map2 (con ctx c2, fn c2' => (SgiConstraint (c1', c2'), loc))) | SgiClassAbs (x, n, k) => S.map2 (kind ctx k, fn k' => (SgiClassAbs (x, n, k'), loc)) | SgiClass (x, n, k, c) => S.bind2 (kind ctx k, fn k' => S.map2 (con ctx c, fn c' => (SgiClass (x, n, k', c'), loc))) and sg ctx s acc = S.bindP (sg' ctx s acc, sgn ctx) and sg' ctx (sAll as (s, loc)) = case s of SgnConst sgis => S.map2 (ListUtil.mapfoldB (fn (ctx, si) => (case #1 si of SgiConAbs (x, n, k) => bind (ctx, NamedC (x, n, k, NONE)) | SgiCon (x, n, k, c) => bind (ctx, NamedC (x, n, k, SOME c)) | SgiDatatype dts => foldl (fn ((x, n, ks, _), ctx) => let val k' = (KType, loc) val k = foldl (fn (_, k) => (KArrow (k', k), loc)) k' ks in bind (ctx, NamedC (x, n, k, NONE)) end) ctx dts | SgiDatatypeImp (x, n, m1, ms, s, _, _) => bind (ctx, NamedC (x, n, (KType, loc), SOME (CModProj (m1, ms, s), loc))) | SgiVal _ => ctx | SgiStr (x, n, sgn) => bind (ctx, Str (x, n, sgn)) | SgiSgn (x, n, sgn) => bind (ctx, Sgn (x, n, sgn)) | SgiConstraint _ => ctx | SgiClassAbs (x, n, k) => bind (ctx, NamedC (x, n, (KArrow (k, (KType, loc)), loc), NONE)) | SgiClass (x, n, k, c) => bind (ctx, NamedC (x, n, (KArrow (k, (KType, loc)), loc), SOME c)), sgi ctx si)) ctx sgis, fn sgis' => (SgnConst sgis', loc)) | SgnVar _ => S.return2 sAll | SgnFun (m, n, s1, s2) => S.bind2 (sg ctx s1, fn s1' => S.map2 (sg (bind (ctx, Str (m, n, s1'))) s2, fn s2' => (SgnFun (m, n, s1', s2'), loc))) | SgnProj _ => S.return2 sAll | SgnWhere (sgn, x, c) => S.bind2 (sg ctx sgn, fn sgn' => S.map2 (con ctx c, fn c' => (SgnWhere (sgn', x, c'), loc))) | SgnError => S.return2 sAll in sg end fun mapfold {kind, con, sgn_item, sgn} = mapfoldB {kind = fn () => kind, con = fn () => con, sgn_item = fn () => sgn_item, sgn = fn () => sgn, bind = fn ((), _) => ()} () fun mapB {kind, con, sgn_item, sgn, bind} ctx s = case mapfoldB {kind = fn ctx => fn k => fn () => S.Continue (kind ctx k, ()), con = fn ctx => fn c => fn () => S.Continue (con ctx c, ()), sgn_item = fn ctx => fn sgi => fn () => S.Continue (sgn_item ctx sgi, ()), sgn = fn ctx => fn s => fn () => S.Continue (sgn ctx s, ()), bind = bind} ctx s () of S.Continue (s, ()) => s | S.Return _ => raise Fail "ElabUtil.Sgn.mapB: Impossible" fun map {kind, con, sgn_item, sgn} s = case mapfold {kind = fn k => fn () => S.Continue (kind k, ()), con = fn c => fn () => S.Continue (con c, ()), sgn_item = fn si => fn () => S.Continue (sgn_item si, ()), sgn = fn s => fn () => S.Continue (sgn s, ())} s () of S.Return () => raise Fail "Elab_util.Sgn.map" | S.Continue (s, ()) => s end structure Decl = struct datatype binder = RelK of string | RelC of string * Elab.kind | NamedC of string * int * Elab.kind * Elab.con option | RelE of string * Elab.con | NamedE of string * Elab.con | Str of string * Elab.sgn | Sgn of string * Elab.sgn fun mapfoldB {kind = fk, con = fc, exp = fe, sgn_item = fsgi, sgn = fsg, str = fst, 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'} fun bind' (ctx, b) = let val b' = case b of Exp.RelK x => RelK x | Exp.RelC x => RelC x | Exp.NamedC x => NamedC x | Exp.RelE x => RelE x | Exp.NamedE x => NamedE x in bind (ctx, b') end val mfe = Exp.mapfoldB {kind = fk, con = fc, exp = fe, bind = bind'} fun bind' (ctx, b) = let val b' = case b of Sgn.RelK x => RelK x | Sgn.RelC x => RelC x | Sgn.NamedC x => NamedC x | Sgn.Sgn (x, _, y) => Sgn (x, y) | Sgn.Str (x, _, y) => Str (x, y) in bind (ctx, b') end val mfsg = Sgn.mapfoldB {kind = fk, con = fc, sgn_item = fsgi, sgn = fsg, bind = bind'} fun mfst ctx str acc = S.bindP (mfst' ctx str acc, fst ctx) and mfst' ctx (strAll as (str, loc)) = case str of StrConst ds => S.map2 (ListUtil.mapfoldB (fn (ctx, d) => (case #1 d of DCon (x, n, k, c) => bind (ctx, NamedC (x, n, k, SOME c)) | DDatatype dts => let fun doOne ((x, n, xs, xncs), ctx) = let val ctx = bind (ctx, NamedC (x, n, (KType, loc), NONE)) in foldl (fn ((x, _, co), ctx) => let val t = case co of NONE => CNamed n | SOME t => TFun (t, (CNamed n, loc)) val k = (KType, loc) val t = (t, loc) val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs in bind (ctx, NamedE (x, t)) end) ctx xncs end in foldl doOne ctx dts end | DDatatypeImp (x, n, m, ms, x', _, _) => bind (ctx, NamedC (x, n, (KType, loc), SOME (CModProj (m, ms, x'), loc))) | DVal (x, _, c, _) => bind (ctx, NamedE (x, c)) | DValRec vis => foldl (fn ((x, _, c, _), ctx) => bind (ctx, NamedE (x, c))) ctx vis | DSgn (x, _, sgn) => bind (ctx, Sgn (x, sgn)) | DStr (x, _, sgn, _) => bind (ctx, Str (x, sgn)) | DFfiStr (x, _, sgn) => bind (ctx, Str (x, sgn)) | DConstraint _ => ctx | DExport _ => ctx | DTable (tn, x, n, c, _, pc, _, cc) => let val ct = (CModProj (n, [], "sql_table"), loc) val ct = (CApp (ct, c), loc) val ct = (CApp (ct, (CConcat (pc, cc), loc)), loc) in bind (ctx, NamedE (x, ct)) end | DSequence (tn, x, n) => bind (ctx, NamedE (x, (CModProj (n, [], "sql_sequence"), loc))) | DView (tn, x, n, _, c) => let val ct = (CModProj (n, [], "sql_view"), loc) val ct = (CApp (ct, c), loc) in bind (ctx, NamedE (x, ct)) end | DClass (x, n, k, c) => bind (ctx, NamedC (x, n, (KArrow (k, (KType, loc)), loc), SOME c)) | DDatabase _ => ctx | DCookie (tn, x, n, c) => bind (ctx, NamedE (x, (CApp ((CModProj (n, [], "cookie"), loc), c), loc))) | DStyle (tn, x, n) => bind (ctx, NamedE (x, (CModProj (n, [], "css_class"), loc))) | DTask _ => ctx | DPolicy _ => ctx | DOnError _ => ctx, mfd ctx d)) ctx ds, fn ds' => (StrConst ds', loc)) | StrVar _ => S.return2 strAll | StrProj (str, x) => S.map2 (mfst ctx str, fn str' => (StrProj (str', x), loc)) | StrFun (x, n, sgn1, sgn2, str) => S.bind2 (mfsg ctx sgn1, fn sgn1' => S.bind2 (mfsg ctx sgn2, fn sgn2' => S.map2 (mfst ctx str, fn str' => (StrFun (x, n, sgn1', sgn2', str'), loc)))) | StrApp (str1, str2) => S.bind2 (mfst ctx str1, fn str1' => S.map2 (mfst ctx str2, fn str2' => (StrApp (str1', str2'), loc))) | StrError => S.return2 strAll and 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 dts => S.map2 (ListUtil.mapfold (fn (x, n, xs, xncs) => 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' => (x, n, xs, xncs'))) dts, fn dts' => (DDatatype dts', loc)) | DDatatypeImp (x, n, m1, ms, s, xs, xncs) => 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' => (DDatatypeImp (x, n, m1, ms, s, xs, xncs'), loc)) | DVal vi => S.map2 (mfvi ctx vi, fn vi' => (DVal vi', loc)) | DValRec vis => S.map2 (ListUtil.mapfold (mfvi ctx) vis, fn vis' => (DValRec vis', loc)) | DSgn (x, n, sgn) => S.map2 (mfsg ctx sgn, fn sgn' => (DSgn (x, n, sgn'), loc)) | DStr (x, n, sgn, str) => S.bind2 (mfsg ctx sgn, fn sgn' => S.map2 (mfst ctx str, fn str' => (DStr (x, n, sgn', str'), loc))) | DFfiStr (x, n, sgn) => S.map2 (mfsg ctx sgn, fn sgn' => (DFfiStr (x, n, sgn'), loc)) | DConstraint (c1, c2) => S.bind2 (mfc ctx c1, fn c1' => S.map2 (mfc ctx c2, fn c2' => (DConstraint (c1', c2'), loc))) | DExport (en, sgn, str) => S.bind2 (mfsg ctx sgn, fn sgn' => S.map2 (mfst ctx str, fn str' => (DExport (en, sgn', str'), loc))) | DTable (tn, x, n, c, pe, pc, ce, cc) => S.bind2 (mfc ctx c, fn c' => S.bind2 (mfe ctx pe, fn pe' => S.bind2 (mfc ctx pc, fn pc' => S.bind2 (mfe ctx ce, fn ce' => S.map2 (mfc ctx cc, fn cc' => (DTable (tn, x, n, c', pe', pc', ce', cc'), loc)))))) | DSequence _ => S.return2 dAll | DView (tn, x, n, e, c) => S.bind2 (mfe ctx e, fn e' => S.map2 (mfc ctx c, fn c' => (DView (tn, x, n, e', c'), loc))) | DClass (x, n, k, c) => S.bind2 (mfk ctx k, fn k' => S.map2 (mfc ctx c, fn c' => (DClass (x, n, k', c'), loc))) | DDatabase _ => S.return2 dAll | DCookie (tn, x, n, c) => S.map2 (mfc ctx c, fn c' => (DCookie (tn, x, n, c'), loc)) | DStyle _ => S.return2 dAll | DTask (e1, e2) => S.bind2 (mfe ctx e1, fn e1' => S.map2 (mfe ctx e2, fn e2' => (DTask (e1', e2'), loc))) | DPolicy e1 => S.map2 (mfe ctx e1, fn e1' => (DPolicy e1', loc)) | DOnError _ => S.return2 dAll and mfvi ctx (x, n, c, e) = S.bind2 (mfc ctx c, fn c' => S.map2 (mfe ctx e, fn e' => (x, n, c', e'))) in mfd end fun mapfold {kind, con, exp, sgn_item, sgn, str, decl} = mapfoldB {kind = fn () => kind, con = fn () => con, exp = fn () => exp, sgn_item = fn () => sgn_item, sgn = fn () => sgn, str = fn () => str, decl = fn () => decl, bind = fn ((), _) => ()} () fun exists {kind, con, exp, sgn_item, sgn, str, decl} 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, ()), sgn_item = fn sgi => fn () => if sgn_item sgi then S.Return () else S.Continue (sgi, ()), sgn = fn x => fn () => if sgn x then S.Return () else S.Continue (x, ()), str = fn x => fn () => if str x then S.Return () else S.Continue (x, ()), decl = fn x => fn () => if decl x then S.Return () else S.Continue (x, ())} k () of S.Return _ => true | S.Continue _ => false fun search {kind, con, exp, sgn_item, sgn, str, decl} k = case mapfold {kind = fn x => fn () => case kind x of NONE => S.Continue (x, ()) | SOME v => S.Return v, con = fn x => fn () => case con x of NONE => S.Continue (x, ()) | SOME v => S.Return v, exp = fn x => fn () => case exp x of NONE => S.Continue (x, ()) | SOME v => S.Return v, sgn_item = fn x => fn () => case sgn_item x of NONE => S.Continue (x, ()) | SOME v => S.Return v, sgn = fn x => fn () => case sgn x of NONE => S.Continue (x, ()) | SOME v => S.Return v, str = fn x => fn () => case str x of NONE => S.Continue (x, ()) | SOME v => S.Return v, decl = fn x => fn () => case decl x of NONE => S.Continue (x, ()) | SOME v => S.Return v } k () of S.Return x => SOME x | S.Continue _ => NONE fun foldMapB {kind, con, exp, sgn_item, sgn, str, decl, bind} ctx st d = case mapfoldB {kind = fn ctx => fn x => fn st => S.Continue (kind (ctx, x, st)), con = fn ctx => fn x => fn st => S.Continue (con (ctx, x, st)), exp = fn ctx => fn x => fn st => S.Continue (exp (ctx, x, st)), sgn_item = fn ctx => fn x => fn st => S.Continue (sgn_item (ctx, x, st)), sgn = fn ctx => fn x => fn st => S.Continue (sgn (ctx, x, st)), str = fn ctx => fn x => fn st => S.Continue (str (ctx, x, st)), decl = fn ctx => fn x => fn st => S.Continue (decl (ctx, x, st)), bind = bind} ctx d st of S.Continue x => x | S.Return _ => raise Fail "ElabUtil.Decl.foldMapB: Impossible" end structure File = struct fun maxName ds = foldl (fn (d, count) => Int.max (maxNameDecl d, count)) 0 ds and maxNameDecl (d, _) = case d of DCon (_, n, _, _) => n | DDatatype dts => foldl (fn ((_, n, _, ns), max) => foldl (fn ((_, n', _), m) => Int.max (n', m)) (Int.max (n, max)) ns) 0 dts | DDatatypeImp (_, n1, n2, _, _, _, ns) => foldl (fn ((_, n', _), m) => Int.max (n', m)) (Int.max (n1, n2)) ns | DVal (_, n, _, _) => n | DValRec vis => foldl (fn ((_, n, _, _), count) => Int.max (n, count)) 0 vis | DStr (_, n, sgn, str) => Int.max (n, Int.max (maxNameSgn sgn, maxNameStr str)) | DSgn (_, n, sgn) => Int.max (n, maxNameSgn sgn) | DFfiStr (_, n, sgn) => Int.max (n, maxNameSgn sgn) | DConstraint _ => 0 | DClass (_, n, _, _) => n | DExport _ => 0 | DTable (n1, _, n2, _, _, _, _, _) => Int.max (n1, n2) | DSequence (n1, _, n2) => Int.max (n1, n2) | DView (n1, _, n2, _, _) => Int.max (n1, n2) | DDatabase _ => 0 | DCookie (n1, _, n2, _) => Int.max (n1, n2) | DStyle (n1, _, n2) => Int.max (n1, n2) | DTask _ => 0 | DPolicy _ => 0 | DOnError _ => 0 and maxNameStr (str, _) = case str of StrConst ds => maxName ds | StrVar n => n | StrProj (str, _) => maxNameStr str | StrFun (_, n, dom, ran, str) => foldl Int.max n [maxNameSgn dom, maxNameSgn ran, maxNameStr str] | StrApp (str1, str2) => Int.max (maxNameStr str1, maxNameStr str2) | StrError => 0 and maxNameSgn (sgn, _) = case sgn of SgnConst sgis => foldl (fn (sgi, count) => Int.max (maxNameSgi sgi, count)) 0 sgis | SgnVar n => n | SgnFun (_, n, dom, ran) => Int.max (n, Int.max (maxNameSgn dom, maxNameSgn ran)) | SgnWhere (sgn, _, _) => maxNameSgn sgn | SgnProj (n, _, _) => n | SgnError => 0 and maxNameSgi (sgi, _) = case sgi of SgiConAbs (_, n, _) => n | SgiCon (_, n, _, _) => n | SgiDatatype dts => foldl (fn ((_, n, _, ns), max) => foldl (fn ((_, n', _), m) => Int.max (n', m)) (Int.max (n, max)) ns) 0 dts | SgiDatatypeImp (_, n1, n2, _, _, _, ns) => foldl (fn ((_, n', _), m) => Int.max (n', m)) (Int.max (n1, n2)) ns | SgiVal (_, n, _) => n | SgiStr (_, n, sgn) => Int.max (n, maxNameSgn sgn) | SgiSgn (_, n, sgn) => Int.max (n, maxNameSgn sgn) | SgiConstraint _ => 0 | SgiClassAbs (_, n, _) => n | SgiClass (_, n, _, _) => n end end