adam@1294
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1 (* Copyright (c) 2008-2010, 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 Explify :> EXPLIFY = struct
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29
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30 structure EM = ErrorMsg
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31 structure L = Elab
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32 structure L' = Expl
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33
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34 fun explifyKind (k, loc) =
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35 case k of
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36 L.KType => (L'.KType, loc)
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37 | L.KArrow (k1, k2) => (L'.KArrow (explifyKind k1, explifyKind k2), loc)
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38 | L.KName => (L'.KName, loc)
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39 | L.KRecord k => (L'.KRecord (explifyKind k), loc)
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40
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adamc@87
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41 | L.KUnit => (L'.KUnit, loc)
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adamc@213
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42 | L.KTuple ks => (L'.KTuple (map explifyKind ks), loc)
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adamc@82
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43
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44 | L.KError => raise Fail ("explifyKind: KError at " ^ EM.spanToString loc)
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adam@1639
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45 | L.KUnif (_, _, ref (L.KKnown k)) => explifyKind k
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46 | L.KUnif _ => raise Fail ("explifyKind: KUnif at " ^ EM.spanToString loc)
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47 | L.KTupleUnif (loc, _, ref (L.KKnown k)) => explifyKind k
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adam@1302
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48 | L.KTupleUnif _ => raise Fail ("explifyKind: KTupleUnif at " ^ EM.spanToString loc)
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49
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50 | L.KRel n => (L'.KRel n, loc)
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51 | L.KFun (x, k) => (L'.KFun (x, explifyKind k), loc)
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52
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53 fun explifyCon (c, loc) =
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54 case c of
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55 L.TFun (t1, t2) => (L'.TFun (explifyCon t1, explifyCon t2), loc)
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56 | L.TCFun (_, x, k, t) => (L'.TCFun (x, explifyKind k, explifyCon t), loc)
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adamc@628
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57 | L.TDisjoint (_, _, t) => explifyCon t
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adamc@38
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58 | L.TRecord c => (L'.TRecord (explifyCon c), loc)
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59
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60 | L.CRel n => (L'.CRel n, loc)
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61 | L.CNamed n => (L'.CNamed n, loc)
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62 | L.CModProj (m, ms, x) => (L'.CModProj (m, ms, x), loc)
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63
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64 | L.CApp (c1, c2) => (L'.CApp (explifyCon c1, explifyCon c2), loc)
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65 | L.CAbs (x, k, c) => (L'.CAbs (x, explifyKind k, explifyCon c), loc)
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66
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67 | L.CName s => (L'.CName s, loc)
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68
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69 | L.CRecord (k, xcs) => (L'.CRecord (explifyKind k, map (fn (c1, c2) => (explifyCon c1, explifyCon c2)) xcs), loc)
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70 | L.CConcat (c1, c2) => (L'.CConcat (explifyCon c1, explifyCon c2), loc)
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adamc@621
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71 | L.CMap (dom, ran) => (L'.CMap (explifyKind dom, explifyKind ran), loc)
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72
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73 | L.CUnit => (L'.CUnit, loc)
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adamc@82
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74
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75 | L.CTuple cs => (L'.CTuple (map explifyCon cs), loc)
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76 | L.CProj (c, n) => (L'.CProj (explifyCon c, n), loc)
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77
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78 | L.CError => raise Fail ("explifyCon: CError at " ^ EM.spanToString loc)
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79 | L.CUnif (nl, _, _, _, ref (L.Known c)) => explifyCon (ElabEnv.mliftConInCon nl c)
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80 | L.CUnif _ => raise Fail ("explifyCon: CUnif at " ^ EM.spanToString loc)
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81
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82 | L.CKAbs (x, c) => (L'.CKAbs (x, explifyCon c), loc)
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83 | L.CKApp (c, k) => (L'.CKApp (explifyCon c, explifyKind k), loc)
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84 | L.TKFun (x, c) => (L'.TKFun (x, explifyCon c), loc)
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85
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86 fun explifyPatCon pc =
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87 case pc of
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88 L.PConVar n => L'.PConVar n
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89 | L.PConProj x => L'.PConProj x
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90
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91 fun explifyPat (p, loc) =
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92 case p of
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93 L.PWild => (L'.PWild, loc)
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94 | L.PVar (x, t) => (L'.PVar (x, explifyCon t), loc)
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95 | L.PPrim p => (L'.PPrim p, loc)
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96 | L.PCon (dk, pc, cs, po) => (L'.PCon (dk, explifyPatCon pc, map explifyCon cs, Option.map explifyPat po), loc)
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97 | L.PRecord xps => (L'.PRecord (map (fn (x, p, t) => (x, explifyPat p, explifyCon t)) xps), loc)
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98
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99 fun explifyExp (e, loc) =
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100 case e of
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101 L.EPrim p => (L'.EPrim p, loc)
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102 | L.ERel n => (L'.ERel n, loc)
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103 | L.ENamed n => (L'.ENamed n, loc)
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104 | L.EModProj (m, ms, x) => (L'.EModProj (m, ms, x), loc)
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105 | L.EApp (e1, e2) => (L'.EApp (explifyExp e1, explifyExp e2), loc)
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106 | L.EAbs (x, dom, ran, e1) => (L'.EAbs (x, explifyCon dom, explifyCon ran, explifyExp e1), loc)
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107 | L.ECApp (e1, c) => (L'.ECApp (explifyExp e1, explifyCon c), loc)
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108 | L.ECAbs (_, x, k, e1) => (L'.ECAbs (x, explifyKind k, explifyExp e1), loc)
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109
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110 | L.ERecord xes => (L'.ERecord (map (fn (c, e, t) => (explifyCon c, explifyExp e, explifyCon t)) xes), loc)
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111 | L.EField (e1, c, {field, rest}) => (L'.EField (explifyExp e1, explifyCon c,
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112 {field = explifyCon field, rest = explifyCon rest}), loc)
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113 | L.EConcat (e1, c1, e2, c2) => (L'.EConcat (explifyExp e1, explifyCon c1, explifyExp e2, explifyCon c2),
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114 loc)
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115 | L.ECut (e1, c, {field, rest}) => (L'.ECut (explifyExp e1, explifyCon c,
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116 {field = explifyCon field, rest = explifyCon rest}), loc)
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117 | L.ECutMulti (e1, c, {rest}) => (L'.ECutMulti (explifyExp e1, explifyCon c,
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118 {rest = explifyCon rest}), loc)
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119 | L.ECase (e, pes, {disc, result}) =>
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120 (L'.ECase (explifyExp e,
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121 map (fn (p, e) => (explifyPat p, explifyExp e)) pes,
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122 {disc = explifyCon disc, result = explifyCon result}), loc)
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123
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124 | L.EError => raise Fail ("explifyExp: EError at " ^ EM.spanToString loc)
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125 | L.EUnif (ref (SOME e)) => explifyExp e
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126 | L.EUnif _ => raise Fail ("explifyExp: Undetermined EUnif at " ^ EM.spanToString loc)
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127
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128 | L.ELet (des, e, t) =>
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129 foldr (fn ((de, loc), e) =>
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130 case de of
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131 L.EDValRec _ => raise Fail "explifyExp: Local 'val rec' remains"
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132 | L.EDVal ((L.PVar (x, _), _), t', e') => (L'.ELet (x, explifyCon t', explifyExp e', e), loc)
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133 | L.EDVal (p, t', e') => (L'.ECase (explifyExp e',
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134 [(explifyPat p, e)],
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135 {disc = explifyCon t', result = explifyCon t}), loc))
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136 (explifyExp e) des
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137
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138 | L.EKAbs (x, e) => (L'.EKAbs (x, explifyExp e), loc)
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139 | L.EKApp (e, k) => (L'.EKApp (explifyExp e, explifyKind k), loc)
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140
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141 fun explifySgi (sgi, loc) =
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142 case sgi of
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143 L.SgiConAbs (x, n, k) => SOME (L'.SgiConAbs (x, n, explifyKind k), loc)
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144 | L.SgiCon (x, n, k, c) => SOME (L'.SgiCon (x, n, explifyKind k, explifyCon c), loc)
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145 | L.SgiDatatype dts => SOME (L'.SgiDatatype (map (fn (x, n, xs, xncs) =>
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146 (x, n, xs,
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147 map (fn (x, n, co) =>
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148 (x, n, Option.map explifyCon co)) xncs)) dts), loc)
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149 | L.SgiDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
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150 SOME (L'.SgiDatatypeImp (x, n, m1, ms, s, xs, map (fn (x, n, co) =>
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151 (x, n, Option.map explifyCon co)) xncs), loc)
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152 | L.SgiVal (x, n, c) => SOME (L'.SgiVal (x, n, explifyCon c), loc)
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153 | L.SgiStr (x, n, sgn) => SOME (L'.SgiStr (x, n, explifySgn sgn), loc)
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154 | L.SgiSgn (x, n, sgn) => SOME (L'.SgiSgn (x, n, explifySgn sgn), loc)
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155 | L.SgiConstraint _ => NONE
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156 | L.SgiClassAbs (x, n, k) => SOME (L'.SgiConAbs (x, n, (L'.KArrow (explifyKind k, (L'.KType, loc)), loc)), loc)
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157 | L.SgiClass (x, n, k, c) => SOME (L'.SgiCon (x, n, (L'.KArrow (explifyKind k, (L'.KType, loc)), loc),
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158 explifyCon c), loc)
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159
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160 and explifySgn (sgn, loc) =
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161 case sgn of
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162 L.SgnConst sgis => (L'.SgnConst (List.mapPartial explifySgi sgis), loc)
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163 | L.SgnVar n => (L'.SgnVar n, loc)
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164 | L.SgnFun (m, n, dom, ran) => (L'.SgnFun (m, n, explifySgn dom, explifySgn ran), loc)
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165 | L.SgnWhere (sgn, ms, x, c) => (L'.SgnWhere (explifySgn sgn, ms, x, explifyCon c), loc)
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166 | L.SgnProj x => (L'.SgnProj x, loc)
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167 | L.SgnError => raise Fail ("explifySgn: SgnError at " ^ EM.spanToString loc)
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168
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169 fun explifyDecl (d, loc : EM.span) =
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170 case d of
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171 L.DCon (x, n, k, c) => SOME (L'.DCon (x, n, explifyKind k, explifyCon c), loc)
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172 | L.DDatatype dts => SOME (L'.DDatatype (map (fn (x, n, xs, xncs) =>
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173 (x, n, xs,
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174 map (fn (x, n, co) =>
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175 (x, n, Option.map explifyCon co)) xncs)) dts), loc)
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176 | L.DDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
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177 SOME (L'.DDatatypeImp (x, n, m1, ms, s, xs,
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178 map (fn (x, n, co) =>
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179 (x, n, Option.map explifyCon co)) xncs), loc)
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180 | L.DVal (x, n, t, e) => SOME (L'.DVal (x, n, explifyCon t, explifyExp e), loc)
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adamc@124
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181 | L.DValRec vis => SOME (L'.DValRec (map (fn (x, n, t, e) => (x, n, explifyCon t, explifyExp e)) vis), loc)
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adamc@38
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182
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183 | L.DSgn (x, n, sgn) => SOME (L'.DSgn (x, n, explifySgn sgn), loc)
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184 | L.DStr (x, n, sgn, str) => SOME (L'.DStr (x, n, explifySgn sgn, explifyStr str), loc)
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185 | L.DFfiStr (x, n, sgn) => SOME (L'.DFfiStr (x, n, explifySgn sgn), loc)
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186 | L.DConstraint (c1, c2) => NONE
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187 | L.DExport (en, sgn, str) => SOME (L'.DExport (en, explifySgn sgn, explifyStr str), loc)
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adamc@707
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188 | L.DTable (nt, x, n, c, pe, pc, ce, cc) =>
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189 SOME (L'.DTable (nt, x, n, explifyCon c,
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190 explifyExp pe, explifyCon pc,
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191 explifyExp ce, explifyCon cc), loc)
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192 | L.DView (nt, x, n, e, c) =>
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193 SOME (L'.DView (nt, x, n, explifyExp e, explifyCon c), loc)
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194 | L.DSequence (nt, x, n) => SOME (L'.DSequence (nt, x, n), loc)
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adamc@271
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195 | L.DDatabase s => SOME (L'.DDatabase s, loc)
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adamc@460
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196 | L.DCookie (nt, x, n, c) => SOME (L'.DCookie (nt, x, n, explifyCon c), loc)
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adamc@720
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197 | L.DStyle (nt, x, n) => SOME (L'.DStyle (nt, x, n), loc)
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adamc@1075
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198 | L.DTask (e1, e2) => SOME (L'.DTask (explifyExp e1, explifyExp e2), loc)
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adamc@1199
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199 | L.DPolicy e1 => SOME (L'.DPolicy (explifyExp e1), loc)
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adam@1294
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200 | L.DOnError v => SOME (L'.DOnError v, loc)
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adamc@38
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201
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202 and explifyStr (str, loc) =
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203 case str of
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204 L.StrConst ds => (L'.StrConst (List.mapPartial explifyDecl ds), loc)
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adamc@38
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205 | L.StrVar n => (L'.StrVar n, loc)
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adamc@38
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206 | L.StrProj (str, s) => (L'.StrProj (explifyStr str, s), loc)
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207 | L.StrFun (m, n, dom, ran, str) => (L'.StrFun (m, n, explifySgn dom, explifySgn ran, explifyStr str), loc)
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adamc@45
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208 | L.StrApp (str1, str2) => (L'.StrApp (explifyStr str1, explifyStr str2), loc)
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adamc@38
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209 | L.StrError => raise Fail ("explifyStr: StrError at " ^ EM.spanToString loc)
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adamc@38
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210
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211 val explify = List.mapPartial explifyDecl
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212
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213 end
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