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1 (* Copyright (c) 2008, Adam Chlipala
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2 * All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * - Redistributions of source code must retain the above copyright notice,
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8 * this list of conditions and the following disclaimer.
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9 * - Redistributions in binary form must reproduce the above copyright notice,
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10 * this list of conditions and the following disclaimer in the documentation
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11 * and/or other materials provided with the distribution.
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12 * - The names of contributors may not be used to endorse or promote products
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13 * derived from this software without specific prior written permission.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 *)
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27
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28 structure Monoize :> MONOIZE = struct
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29
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30 structure E = ErrorMsg
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31 structure Env = CoreEnv
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32
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33 structure L = Core
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34 structure L' = Mono
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35
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36 val dummyTyp = (L'.TNamed 0, E.dummySpan)
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37
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38 fun monoName env (all as (c, loc)) =
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39 let
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40 fun poly () =
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41 (E.errorAt loc "Unsupported name constructor";
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42 Print.eprefaces' [("Constructor", CorePrint.p_con env all)];
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43 "")
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44 in
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45 case c of
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46 L.CName s => s
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47 | _ => poly ()
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48 end
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49
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50 fun monoType env (all as (c, loc)) =
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51 let
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52 fun poly () =
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53 (E.errorAt loc "Unsupported type constructor";
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54 Print.eprefaces' [("Constructor", CorePrint.p_con env all)];
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55 dummyTyp)
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56 in
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57 case c of
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58 L.TFun (c1, c2) => (L'.TFun (monoType env c1, monoType env c2), loc)
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59 | L.TCFun _ => poly ()
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60 | L.TRecord (L.CRecord ((L.KType, _), xcs), _) =>
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61 (L'.TRecord (map (fn (x, t) => (monoName env x, monoType env t)) xcs), loc)
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62 | L.TRecord _ => poly ()
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63
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64 | L.CRel _ => poly ()
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65 | L.CNamed n => (L'.TNamed n, loc)
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66 | L.CApp _ => poly ()
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67 | L.CAbs _ => poly ()
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68
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69 | L.CName _ => poly ()
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70
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71 | L.CRecord _ => poly ()
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72 | L.CConcat _ => poly ()
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73 end
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74
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75 val dummyExp = (L'.EPrim (Prim.Int 0), E.dummySpan)
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76
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77 fun monoExp env (all as (e, loc)) =
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78 let
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79 fun poly () =
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80 (E.errorAt loc "Unsupported expression";
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81 Print.eprefaces' [("Expression", CorePrint.p_exp env all)];
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82 dummyExp)
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83 in
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84 case e of
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85 L.EPrim p => (L'.EPrim p, loc)
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86 | L.ERel n => (L'.ERel n, loc)
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87 | L.ENamed n => (L'.ENamed n, loc)
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88 | L.EApp (e1, e2) => (L'.EApp (monoExp env e1, monoExp env e2), loc)
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89 | L.EAbs (x, t, e) =>
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90 (L'.EAbs (x, monoType env t, monoExp (Env.pushERel env x t) e), loc)
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91 | L.ECApp _ => poly ()
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92 | L.ECAbs _ => poly ()
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93
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94 | L.ERecord xes => (L'.ERecord (map (fn (x, e) => (monoName env x, monoExp env e)) xes), loc)
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95 | L.EField (e, x, _) => (L'.EField (monoExp env e, monoName env x), loc)
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96 end
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97
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98 fun monoDecl env (all as (d, loc)) =
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99 let
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100 fun poly () =
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101 (E.errorAt loc "Unsupported declaration";
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102 Print.eprefaces' [("Declaration", CorePrint.p_decl env all)];
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103 NONE)
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104 in
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105 case d of
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106 L.DCon _ => NONE
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107 | L.DVal (x, n, t, e) => SOME (Env.pushENamed env x n t (SOME e),
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108 (L'.DVal (x, n, monoType env t, monoExp env e), loc))
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109 end
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110
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111 fun monoize env ds =
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112 let
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113 val (_, ds) = List.foldl (fn (d, (env, ds)) =>
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114 case monoDecl env d of
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115 NONE => (env, ds)
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116 | SOME (env, d) => (env, d :: ds)) (env, []) ds
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117 in
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118 rev ds
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119 end
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120
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121 end
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