adamc@25: (* Copyright (c) 2008, Adam Chlipala adamc@25: * All rights reserved. adamc@25: * adamc@25: * Redistribution and use in source and binary forms, with or without adamc@25: * modification, are permitted provided that the following conditions are met: adamc@25: * adamc@25: * - Redistributions of source code must retain the above copyright notice, adamc@25: * this list of conditions and the following disclaimer. adamc@25: * - Redistributions in binary form must reproduce the above copyright notice, adamc@25: * this list of conditions and the following disclaimer in the documentation adamc@25: * and/or other materials provided with the distribution. adamc@25: * - The names of contributors may not be used to endorse or promote products adamc@25: * derived from this software without specific prior written permission. adamc@25: * adamc@25: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" adamc@25: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE adamc@25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE adamc@25: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE adamc@25: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR adamc@25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF adamc@25: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS adamc@25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN adamc@25: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) adamc@25: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE adamc@25: * POSSIBILITY OF SUCH DAMAGE. adamc@25: *) adamc@25: adamc@25: structure MonoEnv :> MONO_ENV = struct adamc@25: adamc@25: open Mono adamc@25: adamc@25: structure IM = IntBinaryMap adamc@25: adamc@25: adamc@25: exception UnboundRel of int adamc@25: exception UnboundNamed of int adamc@25: adamc@25: type env = { adamc@168: datatypes : (string * (string * int * typ option) list) IM.map, adamc@178: constructors : (string * typ option * int) IM.map, adamc@25: adamc@183: relE : (string * typ * exp option) list, adamc@109: namedE : (string * typ * exp option * string) IM.map adamc@25: } adamc@25: adamc@25: val empty = { adamc@168: datatypes = IM.empty, adamc@178: constructors = IM.empty, adamc@25: adamc@25: relE = [], adamc@25: namedE = IM.empty adamc@25: } adamc@25: adamc@168: fun pushDatatype (env : env) x n xncs = adamc@168: {datatypes = IM.insert (#datatypes env, n, (x, xncs)), adamc@182: constructors = foldl (fn ((x, n', to), constructors) => adamc@182: IM.insert (constructors, n', (x, to, n))) adamc@178: (#constructors env) xncs, adamc@25: adamc@25: relE = #relE env, adamc@25: namedE = #namedE env} adamc@25: adamc@168: fun lookupDatatype (env : env) n = adamc@168: case IM.find (#datatypes env, n) of adamc@25: NONE => raise UnboundNamed n adamc@25: | SOME x => x adamc@25: adamc@178: fun lookupConstructor (env : env) n = adamc@178: case IM.find (#constructors env, n) of adamc@178: NONE => raise UnboundNamed n adamc@178: | SOME x => x adamc@178: adamc@800: structure U = MonoUtil adamc@800: adamc@800: val liftExpInExp = adamc@800: U.Exp.mapB {typ = fn t => t, adamc@800: exp = fn bound => fn e => adamc@800: case e of adamc@800: ERel xn => adamc@800: if xn < bound then adamc@800: e adamc@800: else adamc@800: ERel (xn + 1) adamc@800: | _ => e, adamc@800: bind = fn (bound, U.Exp.RelE _) => bound + 1 adamc@800: | (bound, _) => bound} adamc@800: adam@1394: val subExpInExp = adam@1394: U.Exp.mapB {typ = fn t => t, adam@1394: exp = fn (xn, rep) => fn e => adam@1394: case e of adam@1394: ERel xn' => adam@1394: (case Int.compare (xn', xn) of adam@1394: EQUAL => #1 rep adam@1394: | GREATER=> ERel (xn' - 1) adam@1394: | LESS => e) adam@1394: | _ => e, adam@1394: bind = fn ((xn, rep), U.Exp.RelE _) => (xn+1, liftExpInExp 0 rep) adam@1394: | (ctx, _) => ctx} adam@1394: adamc@183: fun pushERel (env : env) x t eo = adamc@168: {datatypes = #datatypes env, adamc@178: constructors = #constructors env, adamc@800: relE = (x, t, eo) :: map (fn (x, t, eo) => (x, t, Option.map (liftExpInExp 0) eo)) (#relE env), adamc@25: namedE = #namedE env} adamc@25: adamc@25: fun lookupERel (env : env) n = adamc@25: (List.nth (#relE env, n)) adamc@25: handle Subscript => raise UnboundRel n adamc@25: adamc@109: fun pushENamed (env : env) x n t eo s = adamc@168: {datatypes = #datatypes env, adamc@178: constructors = #constructors env, adamc@25: adamc@25: relE = #relE env, adamc@109: namedE = IM.insert (#namedE env, n, (x, t, eo, s))} adamc@25: adamc@25: fun lookupENamed (env : env) n = adamc@25: case IM.find (#namedE env, n) of adamc@25: NONE => raise UnboundNamed n adamc@25: | SOME x => x adamc@25: adamc@164: fun declBinds env (d, loc) = adamc@25: case d of adamc@808: DDatatype dts => adamc@808: foldl (fn ((x, n, xncs), env) => adamc@808: let adamc@808: val env = pushDatatype env x n xncs adamc@808: val dt = (TDatatype (n, ref (ElabUtil.classifyDatatype xncs, xncs)), loc) adamc@808: in adamc@808: foldl (fn ((x', n', NONE), env) => pushENamed env x' n' dt NONE "" adamc@808: | ((x', n', SOME t), env) => pushENamed env x' n' (TFun (t, dt), loc) NONE "") adamc@808: env xncs adamc@808: end) env dts adamc@164: | DVal (x, n, t, e, s) => pushENamed env x n t (SOME e) s adamc@126: | DValRec vis => foldl (fn ((x, n, t, e, s), env) => pushENamed env x n t NONE s) env vis adamc@109: | DExport _ => env adamc@273: | DTable _ => env adamc@338: | DSequence _ => env adamc@754: | DView _ => env adamc@271: | DDatabase _ => env adamc@569: | DJavaScript _ => env adamc@725: | DCookie _ => env adamc@718: | DStyle _ => env adamc@1075: | DTask _ => env adamc@1199: | DPolicy _ => env adam@1294: | DOnError _ => env adamc@25: adamc@179: fun patBinds env (p, loc) = adamc@179: case p of adamc@179: PWild => env adamc@183: | PVar (x, t) => pushERel env x t NONE adamc@179: | PPrim _ => env adamc@188: | PCon (_, _, NONE) => env adamc@188: | PCon (_, _, SOME p) => patBinds env p adamc@182: | PRecord xps => foldl (fn ((_, p, _), env) => patBinds env p) env xps adamc@288: | PNone _ => env adamc@288: | PSome (_, p) => patBinds env p adamc@179: adamc@567: fun patBindsN (p, loc) = adamc@567: case p of adamc@567: PWild => 0 adamc@567: | PVar _ => 1 adamc@567: | PPrim _ => 0 adamc@567: | PCon (_, _, NONE) => 0 adamc@567: | PCon (_, _, SOME p) => patBindsN p adamc@567: | PRecord xps => foldl (fn ((_, p, _), count) => count + patBindsN p) 0 xps adamc@567: | PNone _ => 0 adamc@567: | PSome (_, p) => patBindsN p adamc@567: adamc@25: end