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Parsing and elaborating (non-mutual) 'val rec'
author Adam Chlipala <adamc@hcoop.net>
date Thu, 17 Jul 2008 10:09:34 -0400
parents 91027db5a07c
children fd98dd10dce7
rev   line source
adamc@25 1 (* Copyright (c) 2008, Adam Chlipala
adamc@25 2 * All rights reserved.
adamc@25 3 *
adamc@25 4 * Redistribution and use in source and binary forms, with or without
adamc@25 5 * modification, are permitted provided that the following conditions are met:
adamc@25 6 *
adamc@25 7 * - Redistributions of source code must retain the above copyright notice,
adamc@25 8 * this list of conditions and the following disclaimer.
adamc@25 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@25 10 * this list of conditions and the following disclaimer in the documentation
adamc@25 11 * and/or other materials provided with the distribution.
adamc@25 12 * - The names of contributors may not be used to endorse or promote products
adamc@25 13 * derived from this software without specific prior written permission.
adamc@25 14 *
adamc@25 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@25 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@25 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@25 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@25 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@25 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@25 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@25 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@25 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@25 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@25 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@25 26 *)
adamc@25 27
adamc@25 28 structure Monoize :> MONOIZE = struct
adamc@25 29
adamc@25 30 structure E = ErrorMsg
adamc@25 31 structure Env = CoreEnv
adamc@25 32
adamc@25 33 structure L = Core
adamc@25 34 structure L' = Mono
adamc@25 35
adamc@25 36 val dummyTyp = (L'.TNamed 0, E.dummySpan)
adamc@25 37
adamc@25 38 fun monoName env (all as (c, loc)) =
adamc@25 39 let
adamc@25 40 fun poly () =
adamc@25 41 (E.errorAt loc "Unsupported name constructor";
adamc@25 42 Print.eprefaces' [("Constructor", CorePrint.p_con env all)];
adamc@25 43 "")
adamc@25 44 in
adamc@25 45 case c of
adamc@25 46 L.CName s => s
adamc@25 47 | _ => poly ()
adamc@25 48 end
adamc@25 49
adamc@25 50 fun monoType env (all as (c, loc)) =
adamc@25 51 let
adamc@25 52 fun poly () =
adamc@25 53 (E.errorAt loc "Unsupported type constructor";
adamc@25 54 Print.eprefaces' [("Constructor", CorePrint.p_con env all)];
adamc@25 55 dummyTyp)
adamc@25 56 in
adamc@25 57 case c of
adamc@25 58 L.TFun (c1, c2) => (L'.TFun (monoType env c1, monoType env c2), loc)
adamc@25 59 | L.TCFun _ => poly ()
adamc@25 60 | L.TRecord (L.CRecord ((L.KType, _), xcs), _) =>
adamc@25 61 (L'.TRecord (map (fn (x, t) => (monoName env x, monoType env t)) xcs), loc)
adamc@25 62 | L.TRecord _ => poly ()
adamc@25 63
adamc@94 64 | L.CApp ((L.CFfi ("Basis", "xml"), _), _) => (L'.TFfi ("Basis", "string"), loc)
adamc@94 65
adamc@25 66 | L.CRel _ => poly ()
adamc@25 67 | L.CNamed n => (L'.TNamed n, loc)
adamc@51 68 | L.CFfi mx => (L'.TFfi mx, loc)
adamc@25 69 | L.CApp _ => poly ()
adamc@25 70 | L.CAbs _ => poly ()
adamc@25 71
adamc@25 72 | L.CName _ => poly ()
adamc@25 73
adamc@25 74 | L.CRecord _ => poly ()
adamc@25 75 | L.CConcat _ => poly ()
adamc@69 76 | L.CFold _ => poly ()
adamc@87 77 | L.CUnit => poly ()
adamc@25 78 end
adamc@25 79
adamc@25 80 val dummyExp = (L'.EPrim (Prim.Int 0), E.dummySpan)
adamc@25 81
adamc@120 82 fun fooifyExp name env =
adamc@120 83 let
adamc@120 84 fun fooify (e, tAll as (t, loc)) =
adamc@120 85 case #1 e of
adamc@120 86 L'.EClosure (fnam, [(L'.ERecord [], _)]) =>
adamc@120 87 let
adamc@120 88 val (_, _, _, s) = Env.lookupENamed env fnam
adamc@120 89 in
adamc@120 90 (L'.EPrim (Prim.String s), loc)
adamc@120 91 end
adamc@120 92 | L'.EClosure (fnam, args) =>
adamc@120 93 let
adamc@120 94 val (_, ft, _, s) = Env.lookupENamed env fnam
adamc@120 95 val ft = monoType env ft
adamc@111 96
adamc@120 97 fun attrify (args, ft, e) =
adamc@120 98 case (args, ft) of
adamc@120 99 ([], _) => e
adamc@120 100 | (arg :: args, (L'.TFun (t, ft), _)) =>
adamc@121 101 attrify (args, ft,
adamc@121 102 (L'.EStrcat (e,
adamc@121 103 (L'.EStrcat ((L'.EPrim (Prim.String "/"), loc),
adamc@121 104 fooify (arg, t)), loc)), loc))
adamc@120 105 | _ => (E.errorAt loc "Type mismatch encoding attribute";
adamc@120 106 e)
adamc@120 107 in
adamc@120 108 attrify (args, ft, (L'.EPrim (Prim.String s), loc))
adamc@120 109 end
adamc@120 110 | _ =>
adamc@120 111 case t of
adamc@120 112 L'.TFfi ("Basis", "string") => (L'.EFfiApp ("Basis", name ^ "ifyString", [e]), loc)
adamc@120 113 | L'.TFfi ("Basis", "int") => (L'.EFfiApp ("Basis", name ^ "ifyInt", [e]), loc)
adamc@120 114 | L'.TFfi ("Basis", "float") => (L'.EFfiApp ("Basis", name ^ "ifyFloat", [e]), loc)
adamc@120 115 | L'.TRecord [] => (L'.EPrim (Prim.String ""), loc)
adamc@111 116
adamc@120 117 | _ => (E.errorAt loc "Don't know how to encode attribute type";
adamc@120 118 Print.eprefaces' [("Type", MonoPrint.p_typ MonoEnv.empty tAll)];
adamc@120 119 dummyExp)
adamc@120 120 in
adamc@120 121 fooify
adamc@120 122 end
adamc@120 123
adamc@120 124 val attrifyExp = fooifyExp "attr"
adamc@120 125 val urlifyExp = fooifyExp "url"
adamc@105 126
adamc@25 127 fun monoExp env (all as (e, loc)) =
adamc@25 128 let
adamc@25 129 fun poly () =
adamc@25 130 (E.errorAt loc "Unsupported expression";
adamc@25 131 Print.eprefaces' [("Expression", CorePrint.p_exp env all)];
adamc@25 132 dummyExp)
adamc@25 133 in
adamc@25 134 case e of
adamc@25 135 L.EPrim p => (L'.EPrim p, loc)
adamc@25 136 | L.ERel n => (L'.ERel n, loc)
adamc@25 137 | L.ENamed n => (L'.ENamed n, loc)
adamc@51 138 | L.EFfi mx => (L'.EFfi mx, loc)
adamc@51 139 | L.EFfiApp (m, x, es) => (L'.EFfiApp (m, x, map (monoExp env) es), loc)
adamc@94 140
adamc@94 141 | L.EApp ((L.ECApp ((L.EFfi ("Basis", "cdata"), _),
adamc@94 142 _), _), se) => monoExp env se
adamc@95 143 | L.EApp (
adamc@95 144 (L.EApp (
adamc@95 145 (L.ECApp (
adamc@95 146 (L.ECApp (
adamc@95 147 (L.ECApp (
adamc@95 148 (L.EFfi ("Basis", "join"),
adamc@95 149 _), _), _),
adamc@95 150 _), _),
adamc@95 151 _), _),
adamc@95 152 xml1), _),
adamc@95 153 xml2) => (L'.EStrcat (monoExp env xml1, monoExp env xml2), loc)
adamc@95 154
adamc@95 155 | L.EApp (
adamc@95 156 (L.EApp (
adamc@104 157 (L.EApp (
adamc@95 158 (L.ECApp (
adamc@104 159 (L.ECApp (
adamc@104 160 (L.ECApp (
adamc@104 161 (L.ECApp (
adamc@104 162 (L.EFfi ("Basis", "tag"),
adamc@104 163 _), _), _), _), _), _), _), _), _),
adamc@104 164 attrs), _),
adamc@95 165 tag), _),
adamc@95 166 xml) =>
adamc@95 167 let
adamc@95 168 fun getTag (e, _) =
adamc@95 169 case e of
adamc@95 170 L.EFfi ("Basis", tag) => tag
adamc@95 171 | _ => (E.errorAt loc "Non-constant XML tag";
adamc@95 172 Print.eprefaces' [("Expression", CorePrint.p_exp env tag)];
adamc@95 173 "")
adamc@95 174
adamc@95 175 val tag = getTag tag
adamc@95 176
adamc@104 177 val attrs = monoExp env attrs
adamc@104 178
adamc@104 179 val tagStart =
adamc@104 180 case #1 attrs of
adamc@104 181 L'.ERecord xes =>
adamc@104 182 let
adamc@104 183 fun lowercaseFirst "" = ""
adamc@104 184 | lowercaseFirst s = str (Char.toLower (String.sub (s, 0))) ^ String.extract (s, 1, NONE)
adamc@104 185
adamc@104 186 val s = (L'.EPrim (Prim.String (String.concat ["<", tag])), loc)
adamc@104 187 in
adamc@105 188 foldl (fn ((x, e, t), s) =>
adamc@104 189 let
adamc@104 190 val xp = " " ^ lowercaseFirst x ^ "=\""
adamc@120 191
adamc@120 192 val fooify =
adamc@120 193 case x of
adamc@120 194 "Link" => urlifyExp
adamc@120 195 | _ => attrifyExp
adamc@104 196 in
adamc@104 197 (L'.EStrcat (s,
adamc@104 198 (L'.EStrcat ((L'.EPrim (Prim.String xp), loc),
adamc@120 199 (L'.EStrcat (fooify env (e, t),
adamc@104 200 (L'.EPrim (Prim.String "\""), loc)),
adamc@104 201 loc)),
adamc@104 202 loc)), loc)
adamc@104 203 end)
adamc@104 204 s xes
adamc@104 205 end
adamc@104 206 | _ => raise Fail "Attributes!"
adamc@104 207
adamc@95 208 fun normal () =
adamc@104 209 (L'.EStrcat ((L'.EStrcat (tagStart, (L'.EPrim (Prim.String ">"), loc)), loc),
adamc@95 210 (L'.EStrcat (monoExp env xml,
adamc@95 211 (L'.EPrim (Prim.String (String.concat ["</", tag, ">"])), loc)), loc)),
adamc@95 212 loc)
adamc@104 213
adamc@104 214
adamc@95 215 in
adamc@95 216 case xml of
adamc@95 217 (L.EApp ((L.ECApp ((L.EFfi ("Basis", "cdata"), _),
adamc@95 218 _), _), (L.EPrim (Prim.String s), _)), _) =>
adamc@95 219 if CharVector.all Char.isSpace s then
adamc@104 220 (L'.EStrcat (tagStart, (L'.EPrim (Prim.String "/>"), loc)), loc)
adamc@95 221 else
adamc@95 222 normal ()
adamc@95 223 | _ => normal ()
adamc@95 224 end
adamc@94 225
adamc@25 226 | L.EApp (e1, e2) => (L'.EApp (monoExp env e1, monoExp env e2), loc)
adamc@26 227 | L.EAbs (x, dom, ran, e) =>
adamc@26 228 (L'.EAbs (x, monoType env dom, monoType env ran, monoExp (Env.pushERel env x dom) e), loc)
adamc@25 229 | L.ECApp _ => poly ()
adamc@25 230 | L.ECAbs _ => poly ()
adamc@25 231
adamc@29 232 | L.ERecord xes => (L'.ERecord (map (fn (x, e, t) => (monoName env x, monoExp env e, monoType env t)) xes), loc)
adamc@25 233 | L.EField (e, x, _) => (L'.EField (monoExp env e, monoName env x), loc)
adamc@73 234 | L.EFold _ => poly ()
adamc@102 235 | L.EWrite e => (L'.EWrite (monoExp env e), loc)
adamc@110 236
adamc@111 237 | L.EClosure (n, es) => (L'.EClosure (n, map (monoExp env) es), loc)
adamc@25 238 end
adamc@25 239
adamc@25 240 fun monoDecl env (all as (d, loc)) =
adamc@25 241 let
adamc@25 242 fun poly () =
adamc@25 243 (E.errorAt loc "Unsupported declaration";
adamc@25 244 Print.eprefaces' [("Declaration", CorePrint.p_decl env all)];
adamc@25 245 NONE)
adamc@25 246 in
adamc@25 247 case d of
adamc@25 248 L.DCon _ => NONE
adamc@109 249 | L.DVal (x, n, t, e, s) => SOME (Env.pushENamed env x n t (SOME e) s,
adamc@109 250 (L'.DVal (x, n, monoType env t, monoExp env e, s), loc))
adamc@115 251 | L.DExport n =>
adamc@115 252 let
adamc@120 253 val (_, t, _, s) = Env.lookupENamed env n
adamc@120 254
adamc@120 255 fun unwind (t, _) =
adamc@120 256 case t of
adamc@120 257 L.TFun (dom, ran) => dom :: unwind ran
adamc@120 258 | _ => []
adamc@120 259
adamc@120 260 val ts = map (monoType env) (unwind t)
adamc@115 261 in
adamc@120 262 SOME (env, (L'.DExport (s, n, ts), loc))
adamc@115 263 end
adamc@25 264 end
adamc@25 265
adamc@25 266 fun monoize env ds =
adamc@25 267 let
adamc@25 268 val (_, ds) = List.foldl (fn (d, (env, ds)) =>
adamc@25 269 case monoDecl env d of
adamc@25 270 NONE => (env, ds)
adamc@25 271 | SOME (env, d) => (env, d :: ds)) (env, []) ds
adamc@25 272 in
adamc@25 273 rev ds
adamc@25 274 end
adamc@25 275
adamc@25 276 end