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annotate src/explify.sml @ 228:19e5791923d0

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Resolving lingering type class constraints
author Adam Chlipala <adamc@hcoop.net>
date Thu, 21 Aug 2008 14:45:31 -0400
parents 0343557355fc
children 3aa010e97db9
rev   line source
adamc@38 1 (* Copyright (c) 2008, Adam Chlipala
adamc@38 2 * All rights reserved.
adamc@38 3 *
adamc@38 4 * Redistribution and use in source and binary forms, with or without
adamc@38 5 * modification, are permitted provided that the following conditions are met:
adamc@38 6 *
adamc@38 7 * - Redistributions of source code must retain the above copyright notice,
adamc@38 8 * this list of conditions and the following disclaimer.
adamc@38 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@38 10 * this list of conditions and the following disclaimer in the documentation
adamc@38 11 * and/or other materials provided with the distribution.
adamc@38 12 * - The names of contributors may not be used to endorse or promote products
adamc@38 13 * derived from this software without specific prior written permission.
adamc@38 14 *
adamc@38 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@38 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@38 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@38 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@38 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@38 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@38 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@38 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@38 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@38 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@38 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@38 26 *)
adamc@38 27
adamc@38 28 structure Explify :> EXPLIFY = struct
adamc@38 29
adamc@38 30 structure EM = ErrorMsg
adamc@38 31 structure L = Elab
adamc@38 32 structure L' = Expl
adamc@38 33
adamc@38 34 fun explifyKind (k, loc) =
adamc@38 35 case k of
adamc@38 36 L.KType => (L'.KType, loc)
adamc@38 37 | L.KArrow (k1, k2) => (L'.KArrow (explifyKind k1, explifyKind k2), loc)
adamc@38 38 | L.KName => (L'.KName, loc)
adamc@38 39 | L.KRecord k => (L'.KRecord (explifyKind k), loc)
adamc@38 40
adamc@87 41 | L.KUnit => (L'.KUnit, loc)
adamc@213 42 | L.KTuple ks => (L'.KTuple (map explifyKind ks), loc)
adamc@82 43
adamc@38 44 | L.KError => raise Fail ("explifyKind: KError at " ^ EM.spanToString loc)
adamc@76 45 | L.KUnif (_, _, ref (SOME k)) => explifyKind k
adamc@38 46 | L.KUnif _ => raise Fail ("explifyKind: KUnif at " ^ EM.spanToString loc)
adamc@38 47
adamc@38 48 fun explifyCon (c, loc) =
adamc@38 49 case c of
adamc@38 50 L.TFun (t1, t2) => (L'.TFun (explifyCon t1, explifyCon t2), loc)
adamc@38 51 | L.TCFun (_, x, k, t) => (L'.TCFun (x, explifyKind k, explifyCon t), loc)
adamc@85 52 | L.TDisjoint (_, _, c) => explifyCon c
adamc@38 53 | L.TRecord c => (L'.TRecord (explifyCon c), loc)
adamc@38 54
adamc@38 55 | L.CRel n => (L'.CRel n, loc)
adamc@38 56 | L.CNamed n => (L'.CNamed n, loc)
adamc@38 57 | L.CModProj (m, ms, x) => (L'.CModProj (m, ms, x), loc)
adamc@38 58
adamc@38 59 | L.CApp (c1, c2) => (L'.CApp (explifyCon c1, explifyCon c2), loc)
adamc@38 60 | L.CAbs (x, k, c) => (L'.CAbs (x, explifyKind k, explifyCon c), loc)
adamc@85 61 | L.CDisjoint (_, _, c) => explifyCon c
adamc@38 62
adamc@38 63 | L.CName s => (L'.CName s, loc)
adamc@38 64
adamc@38 65 | L.CRecord (k, xcs) => (L'.CRecord (explifyKind k, map (fn (c1, c2) => (explifyCon c1, explifyCon c2)) xcs), loc)
adamc@38 66 | L.CConcat (c1, c2) => (L'.CConcat (explifyCon c1, explifyCon c2), loc)
adamc@68 67 | L.CFold (dom, ran) => (L'.CFold (explifyKind dom, explifyKind ran), loc)
adamc@38 68
adamc@87 69 | L.CUnit => (L'.CUnit, loc)
adamc@82 70
adamc@213 71 | L.CTuple cs => (L'.CTuple (map explifyCon cs), loc)
adamc@213 72 | L.CProj (c, n) => (L'.CProj (explifyCon c, n), loc)
adamc@208 73
adamc@38 74 | L.CError => raise Fail ("explifyCon: CError at " ^ EM.spanToString loc)
adamc@76 75 | L.CUnif (_, _, _, ref (SOME c)) => explifyCon c
adamc@38 76 | L.CUnif _ => raise Fail ("explifyCon: CUnif at " ^ EM.spanToString loc)
adamc@38 77
adamc@176 78 fun explifyPatCon pc =
adamc@176 79 case pc of
adamc@176 80 L.PConVar n => L'.PConVar n
adamc@176 81 | L.PConProj x => L'.PConProj x
adamc@176 82
adamc@176 83 fun explifyPat (p, loc) =
adamc@176 84 case p of
adamc@176 85 L.PWild => (L'.PWild, loc)
adamc@182 86 | L.PVar (x, t) => (L'.PVar (x, explifyCon t), loc)
adamc@176 87 | L.PPrim p => (L'.PPrim p, loc)
adamc@191 88 | L.PCon (dk, pc, cs, po) => (L'.PCon (dk, explifyPatCon pc, map explifyCon cs, Option.map explifyPat po), loc)
adamc@182 89 | L.PRecord xps => (L'.PRecord (map (fn (x, p, t) => (x, explifyPat p, explifyCon t)) xps), loc)
adamc@176 90
adamc@38 91 fun explifyExp (e, loc) =
adamc@38 92 case e of
adamc@38 93 L.EPrim p => (L'.EPrim p, loc)
adamc@38 94 | L.ERel n => (L'.ERel n, loc)
adamc@38 95 | L.ENamed n => (L'.ENamed n, loc)
adamc@38 96 | L.EModProj (m, ms, x) => (L'.EModProj (m, ms, x), loc)
adamc@38 97 | L.EApp (e1, e2) => (L'.EApp (explifyExp e1, explifyExp e2), loc)
adamc@38 98 | L.EAbs (x, dom, ran, e1) => (L'.EAbs (x, explifyCon dom, explifyCon ran, explifyExp e1), loc)
adamc@38 99 | L.ECApp (e1, c) => (L'.ECApp (explifyExp e1, explifyCon c), loc)
adamc@38 100 | L.ECAbs (_, x, k, e1) => (L'.ECAbs (x, explifyKind k, explifyExp e1), loc)
adamc@38 101
adamc@38 102 | L.ERecord xes => (L'.ERecord (map (fn (c, e, t) => (explifyCon c, explifyExp e, explifyCon t)) xes), loc)
adamc@38 103 | L.EField (e1, c, {field, rest}) => (L'.EField (explifyExp e1, explifyCon c,
adamc@38 104 {field = explifyCon field, rest = explifyCon rest}), loc)
adamc@149 105 | L.ECut (e1, c, {field, rest}) => (L'.ECut (explifyExp e1, explifyCon c,
adamc@149 106 {field = explifyCon field, rest = explifyCon rest}), loc)
adamc@72 107 | L.EFold k => (L'.EFold (explifyKind k), loc)
adamc@38 108
adamc@182 109 | L.ECase (e, pes, {disc, result}) =>
adamc@182 110 (L'.ECase (explifyExp e,
adamc@182 111 map (fn (p, e) => (explifyPat p, explifyExp e)) pes,
adamc@182 112 {disc = explifyCon disc, result = explifyCon result}), loc)
adamc@171 113
adamc@38 114 | L.EError => raise Fail ("explifyExp: EError at " ^ EM.spanToString loc)
adamc@228 115 | L.EUnif (ref (SOME e)) => explifyExp e
adamc@228 116 | L.EUnif _ => raise Fail ("explifyExp: Undetermined EUnif at " ^ EM.spanToString loc)
adamc@38 117
adamc@38 118 fun explifySgi (sgi, loc) =
adamc@38 119 case sgi of
adamc@88 120 L.SgiConAbs (x, n, k) => SOME (L'.SgiConAbs (x, n, explifyKind k), loc)
adamc@88 121 | L.SgiCon (x, n, k, c) => SOME (L'.SgiCon (x, n, explifyKind k, explifyCon c), loc)
adamc@191 122 | L.SgiDatatype (x, n, xs, xncs) => SOME (L'.SgiDatatype (x, n, xs,
adamc@191 123 map (fn (x, n, co) =>
adamc@191 124 (x, n, Option.map explifyCon co)) xncs), loc)
adamc@191 125 | L.SgiDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
adamc@191 126 SOME (L'.SgiDatatypeImp (x, n, m1, ms, s, xs, map (fn (x, n, co) =>
adamc@191 127 (x, n, Option.map explifyCon co)) xncs), loc)
adamc@88 128 | L.SgiVal (x, n, c) => SOME (L'.SgiVal (x, n, explifyCon c), loc)
adamc@88 129 | L.SgiStr (x, n, sgn) => SOME (L'.SgiStr (x, n, explifySgn sgn), loc)
adamc@88 130 | L.SgiSgn (x, n, sgn) => SOME (L'.SgiSgn (x, n, explifySgn sgn), loc)
adamc@88 131 | L.SgiConstraint _ => NONE
adamc@203 132 | L.SgiTable _ => raise Fail "Explify SgiTable"
adamc@211 133 | L.SgiClassAbs (x, n) => SOME (L'.SgiConAbs (x, n, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)), loc)
adamc@211 134 | L.SgiClass (x, n, c) => SOME (L'.SgiCon (x, n, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc),
adamc@211 135 explifyCon c), loc)
adamc@38 136
adamc@38 137 and explifySgn (sgn, loc) =
adamc@38 138 case sgn of
adamc@88 139 L.SgnConst sgis => (L'.SgnConst (List.mapPartial explifySgi sgis), loc)
adamc@38 140 | L.SgnVar n => (L'.SgnVar n, loc)
adamc@45 141 | L.SgnFun (m, n, dom, ran) => (L'.SgnFun (m, n, explifySgn dom, explifySgn ran), loc)
adamc@45 142 | L.SgnWhere (sgn, x, c) => (L'.SgnWhere (explifySgn sgn, x, explifyCon c), loc)
adamc@64 143 | L.SgnProj x => (L'.SgnProj x, loc)
adamc@38 144 | L.SgnError => raise Fail ("explifySgn: SgnError at " ^ EM.spanToString loc)
adamc@38 145
adamc@38 146 fun explifyDecl (d, loc : EM.span) =
adamc@38 147 case d of
adamc@88 148 L.DCon (x, n, k, c) => SOME (L'.DCon (x, n, explifyKind k, explifyCon c), loc)
adamc@191 149 | L.DDatatype (x, n, xs, xncs) => SOME (L'.DDatatype (x, n, xs,
adamc@191 150 map (fn (x, n, co) =>
adamc@191 151 (x, n, Option.map explifyCon co)) xncs), loc)
adamc@191 152 | L.DDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
adamc@191 153 SOME (L'.DDatatypeImp (x, n, m1, ms, s, xs,
adamc@191 154 map (fn (x, n, co) =>
adamc@191 155 (x, n, Option.map explifyCon co)) xncs), loc)
adamc@88 156 | L.DVal (x, n, t, e) => SOME (L'.DVal (x, n, explifyCon t, explifyExp e), loc)
adamc@124 157 | L.DValRec vis => SOME (L'.DValRec (map (fn (x, n, t, e) => (x, n, explifyCon t, explifyExp e)) vis), loc)
adamc@38 158
adamc@88 159 | L.DSgn (x, n, sgn) => SOME (L'.DSgn (x, n, explifySgn sgn), loc)
adamc@88 160 | L.DStr (x, n, sgn, str) => SOME (L'.DStr (x, n, explifySgn sgn, explifyStr str), loc)
adamc@88 161 | L.DFfiStr (x, n, sgn) => SOME (L'.DFfiStr (x, n, explifySgn sgn), loc)
adamc@88 162 | L.DConstraint (c1, c2) => NONE
adamc@109 163 | L.DExport (en, sgn, str) => SOME (L'.DExport (en, explifySgn sgn, explifyStr str), loc)
adamc@203 164 | L.DTable _ => raise Fail "Explify DTable"
adamc@213 165 | L.DClass (x, n, c) => SOME (L'.DCon (x, n,
adamc@213 166 (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), explifyCon c), loc)
adamc@38 167
adamc@38 168 and explifyStr (str, loc) =
adamc@38 169 case str of
adamc@88 170 L.StrConst ds => (L'.StrConst (List.mapPartial explifyDecl ds), loc)
adamc@38 171 | L.StrVar n => (L'.StrVar n, loc)
adamc@38 172 | L.StrProj (str, s) => (L'.StrProj (explifyStr str, s), loc)
adamc@45 173 | L.StrFun (m, n, dom, ran, str) => (L'.StrFun (m, n, explifySgn dom, explifySgn ran, explifyStr str), loc)
adamc@45 174 | L.StrApp (str1, str2) => (L'.StrApp (explifyStr str1, explifyStr str2), loc)
adamc@38 175 | L.StrError => raise Fail ("explifyStr: StrError at " ^ EM.spanToString loc)
adamc@38 176
adamc@88 177 val explify = List.mapPartial explifyDecl
adamc@38 178
adamc@38 179 end