Mercurial > urweb
view src/elab_env.sml @ 548:b3b06fef7bb5
Treat user-provided error messages as XML
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sun, 07 Dec 2008 11:19:13 -0500 |
parents | aceb2d982f8f |
children | 44958d74c43f |
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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 xn => found xn | 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) => pushCNamedAs env x n (KArrow ((KType, loc), (KType, loc)), loc) NONE | SgiClass (x, n, c) => pushCNamedAs env x n (KArrow ((KType, loc), (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, _) => if x = field then SOME ((KArrow ((KType, #2 sgn), (KType, #2 sgn)), #2 sgn), NONE) else NONE | SgiClass (x, _, c) => if x = field then SOME ((KArrow ((KType, #2 sgn), (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, c) => let val k = (KArrow ((KType, loc), (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