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annotate src/rpcify.sml @ 1795:d28adceef22a

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Allow type class instances with hypotheses via local ('let') definitions
author Adam Chlipala <adam@chlipala.net>
date Wed, 25 Jul 2012 14:04:59 -0400
parents 385a1b799a74
children e15234fbb163
rev   line source
adam@1677 1 (* Copyright (c) 2009, 2012, Adam Chlipala
adamc@607 2 * All rights reserved.
adamc@607 3 *
adamc@607 4 * Redistribution and use in source and binary forms, with or without
adamc@607 5 * modification, are permitted provided that the following conditions are met:
adamc@607 6 *
adamc@607 7 * - Redistributions of source code must retain the above copyright notice,
adamc@607 8 * this list of conditions and the following disclaimer.
adamc@607 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@607 10 * this list of conditions and the following disclaimer in the documentation
adamc@607 11 * and/or other materials provided with the distribution.
adamc@607 12 * - The names of contributors may not be used to endorse or promote products
adamc@607 13 * derived from this software without specific prior written permission.
adamc@607 14 *
adamc@607 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@607 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@607 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@607 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@607 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@607 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@607 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@607 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@607 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@607 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@607 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@607 26 *)
adamc@607 27
adamc@607 28 structure Rpcify :> RPCIFY = struct
adamc@607 29
adamc@607 30 open Core
adamc@607 31
adamc@607 32 structure U = CoreUtil
adamc@607 33 structure E = CoreEnv
adamc@607 34
adamc@607 35 structure IS = IntBinarySet
adamc@607 36 structure IM = IntBinaryMap
adamc@607 37
adamc@607 38 type state = {
adamc@608 39 exported : IS.set,
adamc@957 40 export_decls : decl list
adamc@607 41 }
adamc@607 42
adamc@607 43 fun frob file =
adamc@607 44 let
adamc@908 45 val rpcBaseIds = foldl (fn ((d, _), rpcIds) =>
adamc@908 46 case d of
adamc@908 47 DVal (_, n, _, (EFfi ("Basis", "rpc"), _), _) => IS.add (rpcIds, n)
adamc@908 48 | DVal (_, n, _, (ENamed n', _), _) => if IS.member (rpcIds, n') then
adamc@908 49 IS.add (rpcIds, n)
adamc@908 50 else
adamc@908 51 rpcIds
adamc@908 52 | _ => rpcIds)
adamc@908 53 IS.empty file
adamc@607 54
adamc@609 55 val tfuncs = foldl
adamc@609 56 (fn ((d, _), tfuncs) =>
adamc@609 57 let
adamc@642 58 fun doOne ((x, n, t, e, _), tfuncs) =
adamc@609 59 let
adamc@642 60 val loc = #2 e
adamc@642 61
adamc@642 62 fun crawl (t, e, args) =
adamc@642 63 case (#1 t, #1 e) of
adamc@642 64 (CApp (_, ran), _) =>
adamc@642 65 SOME (x, rev args, ran, e)
adamc@642 66 | (TFun (arg, rest), EAbs (x, _, _, e)) =>
adamc@642 67 crawl (rest, e, (x, arg) :: args)
adamc@642 68 | (TFun (arg, rest), _) =>
adamc@642 69 crawl (rest, (EApp (e, (ERel (length args), loc)), loc), ("x", arg) :: args)
adamc@609 70 | _ => NONE
adamc@609 71 in
adamc@642 72 case crawl (t, e, []) of
adamc@609 73 NONE => tfuncs
adamc@609 74 | SOME sg => IM.insert (tfuncs, n, sg)
adamc@609 75 end
adamc@609 76 in
adamc@609 77 case d of
adamc@609 78 DVal vi => doOne (vi, tfuncs)
adamc@609 79 | DValRec vis => foldl doOne tfuncs vis
adamc@609 80 | _ => tfuncs
adamc@609 81 end)
adamc@609 82 IM.empty file
adamc@609 83
adamc@607 84 fun exp (e, st) =
adamc@649 85 let
adamc@649 86 fun getApp (e', args) =
adamc@908 87 case e' of
adamc@908 88 ENamed n => SOME (n, args)
adamc@908 89 | EApp (e1, e2) => getApp (#1 e1, e2 :: args)
adamc@908 90 | _ => NONE
adamc@642 91
adamc@908 92 fun newRpc (trans : exp, st : state) =
adamc@908 93 case getApp (#1 trans, []) of
adamc@908 94 NONE => (ErrorMsg.errorAt (#2 trans)
adamc@908 95 "RPC code doesn't use a named function or transaction";
adam@1677 96 (*Print.preface ("Expression",
adam@1677 97 CorePrint.p_exp CoreEnv.empty trans);*)
adamc@908 98 (#1 trans, st))
adamc@908 99 | SOME (n, args) =>
adamc@908 100 case IM.find (tfuncs, n) of
adamc@908 101 NONE => ((*Print.prefaces "BAD" [("e", CorePrint.p_exp CoreEnv.empty (e, loc))];*)
adamc@908 102 raise Fail ("Rpcify: Undetected transaction function " ^ Int.toString n))
adamc@908 103 | SOME (_, _, ran, _) =>
adamc@908 104 let
adamc@908 105 val loc = #2 trans
adamc@642 106
adamc@908 107 val (exported, export_decls) =
adamc@908 108 if IS.member (#exported st, n) then
adamc@908 109 (#exported st, #export_decls st)
adamc@908 110 else
adamc@908 111 (IS.add (#exported st, n),
adamc@1104 112 (DExport (Rpc ReadWrite, n, false), loc) :: #export_decls st)
adamc@642 113
adamc@908 114 val st = {exported = exported,
adamc@957 115 export_decls = export_decls}
adamc@642 116
adamc@1020 117 val e' = EServerCall (n, args, ran)
adamc@651 118 in
adamc@908 119 (e', st)
adamc@651 120 end
adamc@649 121 in
adamc@649 122 case e of
adamc@908 123 EApp ((ECApp ((EFfi ("Basis", "rpc"), _), ran), _), trans) => newRpc (trans, st)
adamc@908 124 | EApp ((ECApp ((ENamed n, _), ran), _), trans) =>
adamc@908 125 if IS.member (rpcBaseIds, n) then
adamc@908 126 newRpc (trans, st)
adamc@908 127 else
adamc@908 128 (e, st)
adamc@642 129
adamc@649 130 | _ => (e, st)
adamc@649 131 end
adamc@607 132
adamc@642 133 and doExp (e, st) = U.Exp.foldMap {kind = fn x => x,
adamc@642 134 con = fn x => x,
adamc@642 135 exp = exp} st (ReduceLocal.reduceExp e)
adamc@642 136
adamc@607 137 fun decl (d, st : state) =
adamc@607 138 let
adamc@607 139 val (d, st) = U.Decl.foldMap {kind = fn x => x,
adamc@607 140 con = fn x => x,
adamc@607 141 exp = exp,
adamc@607 142 decl = fn x => x}
adamc@607 143 st d
adamc@607 144 in
adam@1695 145 (d :: #export_decls st,
adamc@908 146 {exported = #exported st,
adamc@957 147 export_decls = []})
adamc@607 148 end
adamc@607 149
adamc@607 150 val (file, _) = ListUtil.foldlMapConcat decl
adamc@908 151 {exported = IS.empty,
adamc@957 152 export_decls = []}
adamc@607 153 file
adamc@607 154 in
adamc@607 155 file
adamc@607 156 end
adamc@607 157
adamc@607 158 end