adamc@2
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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 Elaborate :> ELABORATE = struct
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29
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30 structure P = Prim
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31 structure L = Source
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32 structure L' = Elab
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33 structure E = ElabEnv
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34 structure U = ElabUtil
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35 structure D = Disjoint
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36
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37 open Print
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38 open ElabPrint
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39
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40 structure IM = IntBinaryMap
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41
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42 structure SK = struct
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43 type ord_key = string
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44 val compare = String.compare
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45 end
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46
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47 structure SS = BinarySetFn(SK)
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48 structure SM = BinaryMapFn(SK)
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49
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50 val basis_r = ref 0
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51
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52 fun elabExplicitness e =
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53 case e of
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54 L.Explicit => L'.Explicit
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55 | L.Implicit => L'.Implicit
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56
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57 fun occursKind r =
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58 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
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59 | _ => false)
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60
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61 datatype kunify_error =
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62 KOccursCheckFailed of L'.kind * L'.kind
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63 | KIncompatible of L'.kind * L'.kind
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64
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65 exception KUnify' of kunify_error
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66
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67 fun kunifyError err =
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68 case err of
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69 KOccursCheckFailed (k1, k2) =>
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70 eprefaces "Kind occurs check failed"
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71 [("Kind 1", p_kind k1),
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72 ("Kind 2", p_kind k2)]
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73 | KIncompatible (k1, k2) =>
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74 eprefaces "Incompatible kinds"
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75 [("Kind 1", p_kind k1),
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76 ("Kind 2", p_kind k2)]
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77
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78 fun unifyKinds' (k1All as (k1, _)) (k2All as (k2, _)) =
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79 let
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80 fun err f = raise KUnify' (f (k1All, k2All))
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81 in
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82 case (k1, k2) of
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83 (L'.KType, L'.KType) => ()
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84 | (L'.KUnit, L'.KUnit) => ()
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85
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86 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
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87 (unifyKinds' d1 d2;
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88 unifyKinds' r1 r2)
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89 | (L'.KName, L'.KName) => ()
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90 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' k1 k2
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91 | (L'.KTuple ks1, L'.KTuple ks2) =>
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92 ((ListPair.appEq (fn (k1, k2) => unifyKinds' k1 k2) (ks1, ks2))
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93 handle ListPair.UnequalLengths => err KIncompatible)
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94
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95 | (L'.KError, _) => ()
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96 | (_, L'.KError) => ()
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97
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98 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' k1All k2All
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99 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' k1All k2All
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100
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101 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
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102 if r1 = r2 then
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103 ()
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104 else
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105 r1 := SOME k2All
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106
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107 | (L'.KUnif (_, _, r), _) =>
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108 if occursKind r k2All then
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109 err KOccursCheckFailed
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110 else
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111 r := SOME k2All
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112 | (_, L'.KUnif (_, _, r)) =>
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113 if occursKind r k1All then
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114 err KOccursCheckFailed
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115 else
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116 r := SOME k1All
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117
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118 | _ => err KIncompatible
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119 end
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120
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121 exception KUnify of L'.kind * L'.kind * kunify_error
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122
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123 fun unifyKinds k1 k2 =
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124 unifyKinds' k1 k2
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125 handle KUnify' err => raise KUnify (k1, k2, err)
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126
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127 datatype con_error =
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128 UnboundCon of ErrorMsg.span * string
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129 | UnboundDatatype of ErrorMsg.span * string
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130 | UnboundStrInCon of ErrorMsg.span * string
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131 | WrongKind of L'.con * L'.kind * L'.kind * kunify_error
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132 | DuplicateField of ErrorMsg.span * string
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133 | ProjBounds of L'.con * int
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134 | ProjMismatch of L'.con * L'.kind
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135
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136 fun conError env err =
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137 case err of
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138 UnboundCon (loc, s) =>
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139 ErrorMsg.errorAt loc ("Unbound constructor variable " ^ s)
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140 | UnboundDatatype (loc, s) =>
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141 ErrorMsg.errorAt loc ("Unbound datatype " ^ s)
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142 | UnboundStrInCon (loc, s) =>
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143 ErrorMsg.errorAt loc ("Unbound structure " ^ s)
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144 | WrongKind (c, k1, k2, kerr) =>
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145 (ErrorMsg.errorAt (#2 c) "Wrong kind";
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146 eprefaces' [("Constructor", p_con env c),
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147 ("Have kind", p_kind k1),
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148 ("Need kind", p_kind k2)];
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149 kunifyError kerr)
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150 | DuplicateField (loc, s) =>
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151 ErrorMsg.errorAt loc ("Duplicate record field " ^ s)
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152 | ProjBounds (c, n) =>
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153 (ErrorMsg.errorAt (#2 c) "Out of bounds constructor projection";
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154 eprefaces' [("Constructor", p_con env c),
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155 ("Index", Print.PD.string (Int.toString n))])
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156 | ProjMismatch (c, k) =>
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157 (ErrorMsg.errorAt (#2 c) "Projection from non-tuple constructor";
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158 eprefaces' [("Constructor", p_con env c),
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159 ("Kind", p_kind k)])
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160
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161 fun checkKind env c k1 k2 =
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162 unifyKinds k1 k2
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163 handle KUnify (k1, k2, err) =>
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164 conError env (WrongKind (c, k1, k2, err))
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165
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166 val dummy = ErrorMsg.dummySpan
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167
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168 val ktype = (L'.KType, dummy)
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169 val kname = (L'.KName, dummy)
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170 val ktype_record = (L'.KRecord ktype, dummy)
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171
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172 val cerror = (L'.CError, dummy)
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173 val kerror = (L'.KError, dummy)
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174 val eerror = (L'.EError, dummy)
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175 val sgnerror = (L'.SgnError, dummy)
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176 val strerror = (L'.StrError, dummy)
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177
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178 val int = ref cerror
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179 val float = ref cerror
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180 val string = ref cerror
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181 val table = ref cerror
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182
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183 local
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184 val count = ref 0
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185 in
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186
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187 fun resetKunif () = count := 0
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188
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189 fun kunif loc =
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190 let
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191 val n = !count
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192 val s = if n <= 26 then
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193 str (chr (ord #"A" + n))
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194 else
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195 "U" ^ Int.toString (n - 26)
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196 in
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197 count := n + 1;
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198 (L'.KUnif (loc, s, ref NONE), dummy)
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199 end
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200
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201 end
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202
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203 local
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204 val count = ref 0
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205 in
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206
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207 fun resetCunif () = count := 0
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208
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209 fun cunif (loc, k) =
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210 let
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211 val n = !count
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212 val s = if n <= 26 then
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213 str (chr (ord #"A" + n))
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214 else
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215 "U" ^ Int.toString (n - 26)
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216 in
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217 count := n + 1;
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218 (L'.CUnif (loc, k, s, ref NONE), dummy)
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219 end
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220
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221 end
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222
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223 fun elabKind (k, loc) =
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224 case k of
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225 L.KType => (L'.KType, loc)
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226 | L.KArrow (k1, k2) => (L'.KArrow (elabKind k1, elabKind k2), loc)
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227 | L.KName => (L'.KName, loc)
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228 | L.KRecord k => (L'.KRecord (elabKind k), loc)
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229 | L.KUnit => (L'.KUnit, loc)
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230 | L.KTuple ks => (L'.KTuple (map elabKind ks), loc)
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231 | L.KWild => kunif loc
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232
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233 fun foldKind (dom, ran, loc)=
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234 (L'.KArrow ((L'.KArrow ((L'.KName, loc),
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235 (L'.KArrow (dom,
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236 (L'.KArrow (ran, ran), loc)), loc)), loc),
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237 (L'.KArrow (ran,
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238 (L'.KArrow ((L'.KRecord dom, loc),
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239 ran), loc)), loc)), loc)
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240
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241 fun hnormKind (kAll as (k, _)) =
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242 case k of
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243 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
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244 | _ => kAll
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245
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246 fun elabCon (env, denv) (c, loc) =
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247 case c of
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248 L.CAnnot (c, k) =>
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249 let
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250 val k' = elabKind k
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251 val (c', ck, gs) = elabCon (env, denv) c
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252 in
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253 checkKind env c' ck k';
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254 (c', k', gs)
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255 end
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256
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257 | L.TFun (t1, t2) =>
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258 let
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259 val (t1', k1, gs1) = elabCon (env, denv) t1
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260 val (t2', k2, gs2) = elabCon (env, denv) t2
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261 in
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262 checkKind env t1' k1 ktype;
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263 checkKind env t2' k2 ktype;
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264 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
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265 end
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266 | L.TCFun (e, x, k, t) =>
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267 let
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268 val e' = elabExplicitness e
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269 val k' = elabKind k
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270 val env' = E.pushCRel env x k'
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271 val (t', tk, gs) = elabCon (env', D.enter denv) t
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272 in
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273 checkKind env t' tk ktype;
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274 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
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275 end
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276 | L.TDisjoint (c1, c2, c) =>
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277 let
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278 val (c1', k1, gs1) = elabCon (env, denv) c1
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279 val (c2', k2, gs2) = elabCon (env, denv) c2
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280
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281 val ku1 = kunif loc
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282 val ku2 = kunif loc
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283
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284 val (denv', gs3) = D.assert env denv (c1', c2')
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285 val (c', k, gs4) = elabCon (env, denv') c
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286 in
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287 checkKind env c1' k1 (L'.KRecord ku1, loc);
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288 checkKind env c2' k2 (L'.KRecord ku2, loc);
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289
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290 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
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291 end
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292 | L.TRecord c =>
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293 let
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294 val (c', ck, gs) = elabCon (env, denv) c
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295 val k = (L'.KRecord ktype, loc)
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296 in
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297 checkKind env c' ck k;
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298 ((L'.TRecord c', loc), ktype, gs)
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299 end
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300
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301 | L.CVar ([], s) =>
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302 (case E.lookupC env s of
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303 E.NotBound =>
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304 (conError env (UnboundCon (loc, s));
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305 (cerror, kerror, []))
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306 | E.Rel (n, k) =>
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307 ((L'.CRel n, loc), k, [])
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308 | E.Named (n, k) =>
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309 ((L'.CNamed n, loc), k, []))
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310 | L.CVar (m1 :: ms, s) =>
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311 (case E.lookupStr env m1 of
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312 NONE => (conError env (UnboundStrInCon (loc, m1));
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313 (cerror, kerror, []))
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314 | SOME (n, sgn) =>
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315 let
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316 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
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317 case E.projectStr env {sgn = sgn, str = str, field = m} of
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318 NONE => (conError env (UnboundStrInCon (loc, m));
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319 (strerror, sgnerror))
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320 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
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321 ((L'.StrVar n, loc), sgn) ms
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322
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323 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
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324 NONE => (conError env (UnboundCon (loc, s));
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325 kerror)
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326 | SOME (k, _) => k
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327 in
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328 ((L'.CModProj (n, ms, s), loc), k, [])
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329 end)
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330
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331 | L.CApp (c1, c2) =>
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332 let
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333 val (c1', k1, gs1) = elabCon (env, denv) c1
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334 val (c2', k2, gs2) = elabCon (env, denv) c2
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335 val dom = kunif loc
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336 val ran = kunif loc
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337 in
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338 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
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adamc@5
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339 checkKind env c2' k2 dom;
|
adamc@83
|
340 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
|
adamc@3
|
341 end
|
adamc@67
|
342 | L.CAbs (x, ko, t) =>
|
adamc@3
|
343 let
|
adamc@67
|
344 val k' = case ko of
|
adamc@76
|
345 NONE => kunif loc
|
adamc@67
|
346 | SOME k => elabKind k
|
adamc@3
|
347 val env' = E.pushCRel env x k'
|
adamc@83
|
348 val (t', tk, gs) = elabCon (env', D.enter denv) t
|
adamc@3
|
349 in
|
adamc@8
|
350 ((L'.CAbs (x, k', t'), loc),
|
adamc@83
|
351 (L'.KArrow (k', tk), loc),
|
adamc@83
|
352 gs)
|
adamc@3
|
353 end
|
adamc@3
|
354
|
adamc@84
|
355 | L.CDisjoint (c1, c2, c) =>
|
adamc@84
|
356 let
|
adamc@84
|
357 val (c1', k1, gs1) = elabCon (env, denv) c1
|
adamc@84
|
358 val (c2', k2, gs2) = elabCon (env, denv) c2
|
adamc@84
|
359
|
adamc@84
|
360 val ku1 = kunif loc
|
adamc@84
|
361 val ku2 = kunif loc
|
adamc@84
|
362
|
adamc@90
|
363 val (denv', gs3) = D.assert env denv (c1', c2')
|
adamc@90
|
364 val (c', k, gs4) = elabCon (env, denv') c
|
adamc@84
|
365 in
|
adamc@84
|
366 checkKind env c1' k1 (L'.KRecord ku1, loc);
|
adamc@84
|
367 checkKind env c2' k2 (L'.KRecord ku2, loc);
|
adamc@84
|
368
|
adamc@90
|
369 ((L'.CDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
|
adamc@84
|
370 end
|
adamc@84
|
371
|
adamc@3
|
372 | L.CName s =>
|
adamc@83
|
373 ((L'.CName s, loc), kname, [])
|
adamc@3
|
374
|
adamc@3
|
375 | L.CRecord xcs =>
|
adamc@3
|
376 let
|
adamc@76
|
377 val k = kunif loc
|
adamc@3
|
378
|
adamc@83
|
379 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
|
adamc@83
|
380 let
|
adamc@83
|
381 val (x', xk, gs1) = elabCon (env, denv) x
|
adamc@83
|
382 val (c', ck, gs2) = elabCon (env, denv) c
|
adamc@83
|
383 in
|
adamc@83
|
384 checkKind env x' xk kname;
|
adamc@83
|
385 checkKind env c' ck k;
|
adamc@83
|
386 ((x', c'), gs1 @ gs2 @ gs)
|
adamc@83
|
387 end) [] xcs
|
adamc@67
|
388
|
adamc@67
|
389 val rc = (L'.CRecord (k, xcs'), loc)
|
adamc@67
|
390 (* Add duplicate field checking later. *)
|
adamc@83
|
391
|
adamc@83
|
392 fun prove (xcs, ds) =
|
adamc@83
|
393 case xcs of
|
adamc@83
|
394 [] => ds
|
adamc@83
|
395 | xc :: rest =>
|
adamc@83
|
396 let
|
adamc@83
|
397 val r1 = (L'.CRecord (k, [xc]), loc)
|
adamc@83
|
398 val ds = foldl (fn (xc', ds) =>
|
adamc@83
|
399 let
|
adamc@83
|
400 val r2 = (L'.CRecord (k, [xc']), loc)
|
adamc@83
|
401 in
|
adamc@90
|
402 D.prove env denv (r1, r2, loc) @ ds
|
adamc@83
|
403 end)
|
adamc@83
|
404 ds rest
|
adamc@83
|
405 in
|
adamc@83
|
406 prove (rest, ds)
|
adamc@83
|
407 end
|
adamc@3
|
408 in
|
adamc@83
|
409 (rc, (L'.KRecord k, loc), prove (xcs', gs))
|
adamc@3
|
410 end
|
adamc@3
|
411 | L.CConcat (c1, c2) =>
|
adamc@3
|
412 let
|
adamc@83
|
413 val (c1', k1, gs1) = elabCon (env, denv) c1
|
adamc@83
|
414 val (c2', k2, gs2) = elabCon (env, denv) c2
|
adamc@76
|
415 val ku = kunif loc
|
adamc@3
|
416 val k = (L'.KRecord ku, loc)
|
adamc@3
|
417 in
|
adamc@5
|
418 checkKind env c1' k1 k;
|
adamc@5
|
419 checkKind env c2' k2 k;
|
adamc@83
|
420 ((L'.CConcat (c1', c2'), loc), k,
|
adamc@90
|
421 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
|
adamc@3
|
422 end
|
adamc@67
|
423 | L.CFold =>
|
adamc@67
|
424 let
|
adamc@76
|
425 val dom = kunif loc
|
adamc@76
|
426 val ran = kunif loc
|
adamc@67
|
427 in
|
adamc@67
|
428 ((L'.CFold (dom, ran), loc),
|
adamc@83
|
429 foldKind (dom, ran, loc),
|
adamc@83
|
430 [])
|
adamc@67
|
431 end
|
adamc@3
|
432
|
adamc@83
|
433 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
|
adamc@82
|
434
|
adamc@207
|
435 | L.CTuple cs =>
|
adamc@207
|
436 let
|
adamc@207
|
437 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
|
adamc@207
|
438 let
|
adamc@207
|
439 val (c', k, gs') = elabCon (env, denv) c
|
adamc@207
|
440 in
|
adamc@207
|
441 (c' :: cs', k :: ks, gs' @ gs)
|
adamc@207
|
442 end) ([], [], []) cs
|
adamc@207
|
443 in
|
adamc@207
|
444 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
|
adamc@207
|
445 end
|
adamc@207
|
446 | L.CProj (c, n) =>
|
adamc@207
|
447 let
|
adamc@207
|
448 val (c', k, gs) = elabCon (env, denv) c
|
adamc@207
|
449 in
|
adamc@207
|
450 case hnormKind k of
|
adamc@207
|
451 (L'.KTuple ks, _) =>
|
adamc@207
|
452 if n <= 0 orelse n > length ks then
|
adamc@207
|
453 (conError env (ProjBounds (c', n));
|
adamc@207
|
454 (cerror, kerror, []))
|
adamc@207
|
455 else
|
adamc@207
|
456 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
|
adamc@207
|
457 | k => (conError env (ProjMismatch (c', k));
|
adamc@207
|
458 (cerror, kerror, []))
|
adamc@207
|
459 end
|
adamc@207
|
460
|
adamc@18
|
461 | L.CWild k =>
|
adamc@18
|
462 let
|
adamc@18
|
463 val k' = elabKind k
|
adamc@18
|
464 in
|
adamc@83
|
465 (cunif (loc, k'), k', [])
|
adamc@18
|
466 end
|
adamc@18
|
467
|
adamc@6
|
468 fun kunifsRemain k =
|
adamc@6
|
469 case k of
|
adamc@76
|
470 L'.KUnif (_, _, ref NONE) => true
|
adamc@6
|
471 | _ => false
|
adamc@10
|
472 fun cunifsRemain c =
|
adamc@10
|
473 case c of
|
adamc@76
|
474 L'.CUnif (loc, _, _, ref NONE) => SOME loc
|
adamc@76
|
475 | _ => NONE
|
adamc@6
|
476
|
adamc@76
|
477 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
|
adamc@76
|
478 con = fn _ => false,
|
adamc@76
|
479 exp = fn _ => false,
|
adamc@76
|
480 sgn_item = fn _ => false,
|
adamc@76
|
481 sgn = fn _ => false,
|
adamc@76
|
482 str = fn _ => false,
|
adamc@76
|
483 decl = fn _ => false}
|
adamc@10
|
484
|
adamc@76
|
485 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
|
adamc@76
|
486 con = cunifsRemain,
|
adamc@76
|
487 exp = fn _ => NONE,
|
adamc@76
|
488 sgn_item = fn _ => NONE,
|
adamc@76
|
489 sgn = fn _ => NONE,
|
adamc@76
|
490 str = fn _ => NONE,
|
adamc@76
|
491 decl = fn _ => NONE}
|
adamc@10
|
492
|
adamc@10
|
493 fun occursCon r =
|
adamc@10
|
494 U.Con.exists {kind = fn _ => false,
|
adamc@76
|
495 con = fn L'.CUnif (_, _, _, r') => r = r'
|
adamc@10
|
496 | _ => false}
|
adamc@10
|
497
|
adamc@10
|
498 datatype cunify_error =
|
adamc@10
|
499 CKind of L'.kind * L'.kind * kunify_error
|
adamc@10
|
500 | COccursCheckFailed of L'.con * L'.con
|
adamc@10
|
501 | CIncompatible of L'.con * L'.con
|
adamc@10
|
502 | CExplicitness of L'.con * L'.con
|
adamc@141
|
503 | CKindof of L'.kind * L'.con
|
adamc@153
|
504 | CRecordFailure of PD.pp_desc * PD.pp_desc
|
adamc@10
|
505
|
adamc@10
|
506 exception CUnify' of cunify_error
|
adamc@10
|
507
|
adamc@10
|
508 fun cunifyError env err =
|
adamc@10
|
509 case err of
|
adamc@10
|
510 CKind (k1, k2, kerr) =>
|
adamc@10
|
511 (eprefaces "Kind unification failure"
|
adamc@10
|
512 [("Kind 1", p_kind k1),
|
adamc@10
|
513 ("Kind 2", p_kind k2)];
|
adamc@10
|
514 kunifyError kerr)
|
adamc@10
|
515 | COccursCheckFailed (c1, c2) =>
|
adamc@10
|
516 eprefaces "Constructor occurs check failed"
|
adamc@10
|
517 [("Con 1", p_con env c1),
|
adamc@10
|
518 ("Con 2", p_con env c2)]
|
adamc@10
|
519 | CIncompatible (c1, c2) =>
|
adamc@10
|
520 eprefaces "Incompatible constructors"
|
adamc@10
|
521 [("Con 1", p_con env c1),
|
adamc@10
|
522 ("Con 2", p_con env c2)]
|
adamc@10
|
523 | CExplicitness (c1, c2) =>
|
adamc@10
|
524 eprefaces "Differing constructor function explicitness"
|
adamc@10
|
525 [("Con 1", p_con env c1),
|
adamc@10
|
526 ("Con 2", p_con env c2)]
|
adamc@141
|
527 | CKindof (k, c) =>
|
adamc@147
|
528 eprefaces "Unexpected kind for kindof calculation"
|
adamc@141
|
529 [("Kind", p_kind k),
|
adamc@141
|
530 ("Con", p_con env c)]
|
adamc@153
|
531 | CRecordFailure (s1, s2) =>
|
adamc@153
|
532 eprefaces "Can't unify record constructors"
|
adamc@153
|
533 [("Summary 1", s1),
|
adamc@153
|
534 ("Summary 2", s2)]
|
adamc@10
|
535
|
adamc@13
|
536 exception SynUnif = E.SynUnif
|
adamc@12
|
537
|
adamc@81
|
538 open ElabOps
|
adamc@43
|
539
|
adamc@12
|
540 type record_summary = {
|
adamc@12
|
541 fields : (L'.con * L'.con) list,
|
adamc@12
|
542 unifs : (L'.con * L'.con option ref) list,
|
adamc@12
|
543 others : L'.con list
|
adamc@12
|
544 }
|
adamc@12
|
545
|
adamc@12
|
546 fun summaryToCon {fields, unifs, others} =
|
adamc@12
|
547 let
|
adamc@12
|
548 val c = (L'.CRecord (ktype, []), dummy)
|
adamc@12
|
549 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
|
adamc@12
|
550 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
|
adamc@12
|
551 in
|
adamc@12
|
552 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
|
adamc@12
|
553 end
|
adamc@12
|
554
|
adamc@12
|
555 fun p_summary env s = p_con env (summaryToCon s)
|
adamc@12
|
556
|
adamc@12
|
557 exception CUnify of L'.con * L'.con * cunify_error
|
adamc@12
|
558
|
adamc@12
|
559 fun kindof env (c, loc) =
|
adamc@12
|
560 case c of
|
adamc@12
|
561 L'.TFun _ => ktype
|
adamc@12
|
562 | L'.TCFun _ => ktype
|
adamc@85
|
563 | L'.TDisjoint _ => ktype
|
adamc@12
|
564 | L'.TRecord _ => ktype
|
adamc@12
|
565
|
adamc@12
|
566 | L'.CRel xn => #2 (E.lookupCRel env xn)
|
adamc@12
|
567 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
|
adamc@34
|
568 | L'.CModProj (n, ms, x) =>
|
adamc@34
|
569 let
|
adamc@34
|
570 val (_, sgn) = E.lookupStrNamed env n
|
adamc@34
|
571 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@34
|
572 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@34
|
573 NONE => raise Fail "kindof: Unknown substructure"
|
adamc@34
|
574 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@34
|
575 ((L'.StrVar n, loc), sgn) ms
|
adamc@34
|
576 in
|
adamc@34
|
577 case E.projectCon env {sgn = sgn, str = str, field = x} of
|
adamc@34
|
578 NONE => raise Fail "kindof: Unknown con in structure"
|
adamc@34
|
579 | SOME (k, _) => k
|
adamc@34
|
580 end
|
adamc@34
|
581
|
adamc@12
|
582 | L'.CApp (c, _) =>
|
adamc@141
|
583 (case hnormKind (kindof env c) of
|
adamc@141
|
584 (L'.KArrow (_, k), _) => k
|
adamc@141
|
585 | (L'.KError, _) => kerror
|
adamc@141
|
586 | k => raise CUnify' (CKindof (k, c)))
|
adamc@12
|
587 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
|
adamc@84
|
588 | L'.CDisjoint (_, _, c) => kindof env c
|
adamc@12
|
589
|
adamc@12
|
590 | L'.CName _ => kname
|
adamc@12
|
591
|
adamc@12
|
592 | L'.CRecord (k, _) => (L'.KRecord k, loc)
|
adamc@12
|
593 | L'.CConcat (c, _) => kindof env c
|
adamc@67
|
594 | L'.CFold (dom, ran) => foldKind (dom, ran, loc)
|
adamc@12
|
595
|
adamc@82
|
596 | L'.CUnit => (L'.KUnit, loc)
|
adamc@82
|
597
|
adamc@207
|
598 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
|
adamc@207
|
599 | L'.CProj (c, n) =>
|
adamc@207
|
600 (case hnormKind (kindof env c) of
|
adamc@207
|
601 (L'.KTuple ks, _) => List.nth (ks, n - 1)
|
adamc@207
|
602 | k => raise CUnify' (CKindof (k, c)))
|
adamc@207
|
603
|
adamc@12
|
604 | L'.CError => kerror
|
adamc@76
|
605 | L'.CUnif (_, k, _, _) => k
|
adamc@12
|
606
|
adamc@90
|
607 val hnormCon = D.hnormCon
|
adamc@86
|
608
|
adamc@205
|
609 datatype con_summary =
|
adamc@205
|
610 Nil
|
adamc@205
|
611 | Cons
|
adamc@205
|
612 | Unknown
|
adamc@205
|
613
|
adamc@205
|
614 fun compatible cs =
|
adamc@205
|
615 case cs of
|
adamc@205
|
616 (Unknown, _) => false
|
adamc@205
|
617 | (_, Unknown) => false
|
adamc@205
|
618 | (s1, s2) => s1 = s2
|
adamc@205
|
619
|
adamc@205
|
620 fun summarizeCon (env, denv) c =
|
adamc@205
|
621 let
|
adamc@205
|
622 val (c, gs) = hnormCon (env, denv) c
|
adamc@205
|
623 in
|
adamc@205
|
624 case #1 c of
|
adamc@205
|
625 L'.CRecord (_, []) => (Nil, gs)
|
adamc@205
|
626 | L'.CRecord (_, _ :: _) => (Cons, gs)
|
adamc@205
|
627 | L'.CConcat ((L'.CRecord (_, _ :: _), _), _) => (Cons, gs)
|
adamc@205
|
628 | L'.CDisjoint (_, _, c) =>
|
adamc@205
|
629 let
|
adamc@205
|
630 val (s, gs') = summarizeCon (env, denv) c
|
adamc@205
|
631 in
|
adamc@205
|
632 (s, gs @ gs')
|
adamc@205
|
633 end
|
adamc@205
|
634 | _ => (Unknown, gs)
|
adamc@205
|
635 end
|
adamc@205
|
636
|
adamc@205
|
637 fun p_con_summary s =
|
adamc@205
|
638 Print.PD.string (case s of
|
adamc@205
|
639 Nil => "Nil"
|
adamc@205
|
640 | Cons => "Cons"
|
adamc@205
|
641 | Unknown => "Unknown")
|
adamc@205
|
642
|
adamc@223
|
643 exception SummaryFailure
|
adamc@223
|
644
|
adamc@86
|
645 fun unifyRecordCons (env, denv) (c1, c2) =
|
adamc@12
|
646 let
|
adamc@92
|
647 fun rkindof c =
|
adamc@147
|
648 case hnormKind (kindof env c) of
|
adamc@92
|
649 (L'.KRecord k, _) => k
|
adamc@141
|
650 | (L'.KError, _) => kerror
|
adamc@141
|
651 | k => raise CUnify' (CKindof (k, c))
|
adamc@92
|
652
|
adamc@92
|
653 val k1 = rkindof c1
|
adamc@92
|
654 val k2 = rkindof c2
|
adamc@86
|
655
|
adamc@86
|
656 val (r1, gs1) = recordSummary (env, denv) c1
|
adamc@86
|
657 val (r2, gs2) = recordSummary (env, denv) c2
|
adamc@12
|
658 in
|
adamc@12
|
659 unifyKinds k1 k2;
|
adamc@86
|
660 unifySummaries (env, denv) (k1, r1, r2);
|
adamc@86
|
661 gs1 @ gs2
|
adamc@12
|
662 end
|
adamc@12
|
663
|
adamc@86
|
664 and recordSummary (env, denv) c =
|
adamc@86
|
665 let
|
adamc@86
|
666 val (c, gs) = hnormCon (env, denv) c
|
adamc@12
|
667
|
adamc@86
|
668 val (sum, gs') =
|
adamc@86
|
669 case c of
|
adamc@86
|
670 (L'.CRecord (_, xcs), _) => ({fields = xcs, unifs = [], others = []}, [])
|
adamc@86
|
671 | (L'.CConcat (c1, c2), _) =>
|
adamc@86
|
672 let
|
adamc@86
|
673 val (s1, gs1) = recordSummary (env, denv) c1
|
adamc@86
|
674 val (s2, gs2) = recordSummary (env, denv) c2
|
adamc@86
|
675 in
|
adamc@86
|
676 ({fields = #fields s1 @ #fields s2,
|
adamc@86
|
677 unifs = #unifs s1 @ #unifs s2,
|
adamc@86
|
678 others = #others s1 @ #others s2},
|
adamc@86
|
679 gs1 @ gs2)
|
adamc@86
|
680 end
|
adamc@86
|
681 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary (env, denv) c
|
adamc@86
|
682 | c' as (L'.CUnif (_, _, _, r), _) => ({fields = [], unifs = [(c', r)], others = []}, [])
|
adamc@86
|
683 | c' => ({fields = [], unifs = [], others = [c']}, [])
|
adamc@86
|
684 in
|
adamc@86
|
685 (sum, gs @ gs')
|
adamc@86
|
686 end
|
adamc@86
|
687
|
adamc@86
|
688 and consEq (env, denv) (c1, c2) =
|
adamc@209
|
689 let
|
adamc@209
|
690 val gs = unifyCons (env, denv) c1 c2
|
adamc@209
|
691 in
|
adamc@209
|
692 List.all (fn (loc, env, denv, c1, c2) =>
|
adamc@209
|
693 case D.prove env denv (c1, c2, loc) of
|
adamc@209
|
694 [] => true
|
adamc@209
|
695 | _ => false) gs
|
adamc@209
|
696 end
|
adamc@12
|
697 handle CUnify _ => false
|
adamc@12
|
698
|
adamc@80
|
699 and consNeq env (c1, c2) =
|
adamc@86
|
700 case (#1 (ElabOps.hnormCon env c1), #1 (ElabOps.hnormCon env c2)) of
|
adamc@80
|
701 (L'.CName x1, L'.CName x2) => x1 <> x2
|
adamc@80
|
702 | _ => false
|
adamc@80
|
703
|
adamc@86
|
704 and unifySummaries (env, denv) (k, s1 : record_summary, s2 : record_summary) =
|
adamc@12
|
705 let
|
adamc@223
|
706 val loc = #2 k
|
adamc@14
|
707 (*val () = eprefaces "Summaries" [("#1", p_summary env s1),
|
adamc@223
|
708 ("#2", p_summary env s2)]*)
|
adamc@12
|
709
|
adamc@12
|
710 fun eatMatching p (ls1, ls2) =
|
adamc@12
|
711 let
|
adamc@12
|
712 fun em (ls1, ls2, passed1) =
|
adamc@12
|
713 case ls1 of
|
adamc@12
|
714 [] => (rev passed1, ls2)
|
adamc@12
|
715 | h1 :: t1 =>
|
adamc@12
|
716 let
|
adamc@12
|
717 fun search (ls2', passed2) =
|
adamc@12
|
718 case ls2' of
|
adamc@12
|
719 [] => em (t1, ls2, h1 :: passed1)
|
adamc@12
|
720 | h2 :: t2 =>
|
adamc@12
|
721 if p (h1, h2) then
|
adamc@12
|
722 em (t1, List.revAppend (passed2, t2), passed1)
|
adamc@12
|
723 else
|
adamc@12
|
724 search (t2, h2 :: passed2)
|
adamc@12
|
725 in
|
adamc@12
|
726 search (ls2, [])
|
adamc@12
|
727 end
|
adamc@12
|
728 in
|
adamc@12
|
729 em (ls1, ls2, [])
|
adamc@12
|
730 end
|
adamc@12
|
731
|
adamc@12
|
732 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
|
adamc@80
|
733 not (consNeq env (x1, x2))
|
adamc@86
|
734 andalso consEq (env, denv) (c1, c2)
|
adamc@86
|
735 andalso consEq (env, denv) (x1, x2))
|
adamc@79
|
736 (#fields s1, #fields s2)
|
adamc@14
|
737 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
|
adamc@223
|
738 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
|
adamc@12
|
739 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
|
adamc@86
|
740 val (others1, others2) = eatMatching (consEq (env, denv)) (#others s1, #others s2)
|
adamc@223
|
741 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
|
adamc@223
|
742 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
|
adamc@12
|
743
|
adamc@12
|
744 fun unifFields (fs, others, unifs) =
|
adamc@12
|
745 case (fs, others, unifs) of
|
adamc@12
|
746 ([], [], _) => ([], [], unifs)
|
adamc@12
|
747 | (_, _, []) => (fs, others, [])
|
adamc@12
|
748 | (_, _, (_, r) :: rest) =>
|
adamc@12
|
749 let
|
adamc@12
|
750 val r' = ref NONE
|
adamc@141
|
751 val kr = (L'.KRecord k, dummy)
|
adamc@141
|
752 val cr' = (L'.CUnif (dummy, kr, "recd", r'), dummy)
|
adamc@12
|
753
|
adamc@12
|
754 val prefix = case (fs, others) of
|
adamc@12
|
755 ([], other :: others) =>
|
adamc@12
|
756 List.foldl (fn (other, c) =>
|
adamc@12
|
757 (L'.CConcat (c, other), dummy))
|
adamc@12
|
758 other others
|
adamc@12
|
759 | (fs, []) =>
|
adamc@12
|
760 (L'.CRecord (k, fs), dummy)
|
adamc@12
|
761 | (fs, others) =>
|
adamc@12
|
762 List.foldl (fn (other, c) =>
|
adamc@12
|
763 (L'.CConcat (c, other), dummy))
|
adamc@12
|
764 (L'.CRecord (k, fs), dummy) others
|
adamc@12
|
765 in
|
adamc@12
|
766 r := SOME (L'.CConcat (prefix, cr'), dummy);
|
adamc@12
|
767 ([], [], (cr', r') :: rest)
|
adamc@12
|
768 end
|
adamc@12
|
769
|
adamc@12
|
770 val (fs1, others1, unifs2) = unifFields (fs1, others1, unifs2)
|
adamc@12
|
771 val (fs2, others2, unifs1) = unifFields (fs2, others2, unifs1)
|
adamc@12
|
772
|
adamc@223
|
773 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
|
adamc@223
|
774 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
|
adamc@223
|
775
|
adamc@223
|
776 fun isGuessable (other, fs) =
|
adamc@223
|
777 let
|
adamc@223
|
778 val gs = guessFold (env, denv) (other, (L'.CRecord (k, fs), loc), [], SummaryFailure)
|
adamc@223
|
779 in
|
adamc@223
|
780 List.all (fn (loc, env, denv, c1, c2) =>
|
adamc@223
|
781 case D.prove env denv (c1, c2, loc) of
|
adamc@223
|
782 [] => true
|
adamc@223
|
783 | _ => false) gs
|
adamc@223
|
784 end
|
adamc@223
|
785 handle SummaryFailure => false
|
adamc@223
|
786
|
adamc@223
|
787 val (fs1, fs2, others1, others2) =
|
adamc@223
|
788 case (fs1, fs2, others1, others2) of
|
adamc@223
|
789 ([], _, [other1], []) =>
|
adamc@223
|
790 if isGuessable (other1, fs2) then
|
adamc@223
|
791 ([], [], [], [])
|
adamc@223
|
792 else
|
adamc@223
|
793 (fs1, fs2, others1, others2)
|
adamc@223
|
794 | _ => (fs1, fs2, others1, others2)
|
adamc@223
|
795
|
adamc@223
|
796 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
|
adamc@223
|
797 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
|
adamc@223
|
798
|
adamc@86
|
799 val clear = case (fs1, others1, fs2, others2) of
|
adamc@86
|
800 ([], [], [], []) => true
|
adamc@12
|
801 | _ => false
|
adamc@12
|
802 val empty = (L'.CRecord (k, []), dummy)
|
adamc@223
|
803
|
adamc@12
|
804 fun pairOffUnifs (unifs1, unifs2) =
|
adamc@12
|
805 case (unifs1, unifs2) of
|
adamc@12
|
806 ([], _) =>
|
adamc@86
|
807 if clear then
|
adamc@12
|
808 List.app (fn (_, r) => r := SOME empty) unifs2
|
adamc@12
|
809 else
|
adamc@153
|
810 raise CUnify' (CRecordFailure (p_summary env s1, p_summary env s2))
|
adamc@12
|
811 | (_, []) =>
|
adamc@86
|
812 if clear then
|
adamc@12
|
813 List.app (fn (_, r) => r := SOME empty) unifs1
|
adamc@12
|
814 else
|
adamc@153
|
815 raise CUnify' (CRecordFailure (p_summary env s1, p_summary env s2))
|
adamc@12
|
816 | ((c1, _) :: rest1, (_, r2) :: rest2) =>
|
adamc@12
|
817 (r2 := SOME c1;
|
adamc@12
|
818 pairOffUnifs (rest1, rest2))
|
adamc@12
|
819 in
|
adamc@12
|
820 pairOffUnifs (unifs1, unifs2)
|
adamc@223
|
821 (*before eprefaces "Summaries'" [("#1", p_summary env s1),
|
adamc@223
|
822 ("#2", p_summary env s2)]*)
|
adamc@223
|
823 end
|
adamc@223
|
824
|
adamc@223
|
825 and guessFold (env, denv) (c1, c2, gs, ex) =
|
adamc@223
|
826 let
|
adamc@223
|
827 val loc = #2 c1
|
adamc@223
|
828
|
adamc@223
|
829 fun unfold (dom, ran, f, i, r, c) =
|
adamc@223
|
830 let
|
adamc@223
|
831 val nm = cunif (loc, (L'.KName, loc))
|
adamc@223
|
832 val v = cunif (loc, dom)
|
adamc@223
|
833 val rest = cunif (loc, (L'.KRecord dom, loc))
|
adamc@223
|
834 val acc = (L'.CFold (dom, ran), loc)
|
adamc@223
|
835 val acc = (L'.CApp (acc, f), loc)
|
adamc@223
|
836 val acc = (L'.CApp (acc, i), loc)
|
adamc@223
|
837 val acc = (L'.CApp (acc, rest), loc)
|
adamc@223
|
838
|
adamc@223
|
839 val (iS, gs3) = summarizeCon (env, denv) i
|
adamc@223
|
840
|
adamc@223
|
841 val app = (L'.CApp (f, nm), loc)
|
adamc@223
|
842 val app = (L'.CApp (app, v), loc)
|
adamc@223
|
843 val app = (L'.CApp (app, acc), loc)
|
adamc@223
|
844 val (appS, gs4) = summarizeCon (env, denv) app
|
adamc@223
|
845
|
adamc@223
|
846 val (cS, gs5) = summarizeCon (env, denv) c
|
adamc@223
|
847 in
|
adamc@223
|
848 (*prefaces "Summaries" [("iS", p_con_summary iS),
|
adamc@223
|
849 ("appS", p_con_summary appS),
|
adamc@223
|
850 ("cS", p_con_summary cS)];*)
|
adamc@223
|
851
|
adamc@223
|
852 if compatible (iS, appS) then
|
adamc@223
|
853 raise ex
|
adamc@223
|
854 else if compatible (cS, iS) then
|
adamc@223
|
855 let
|
adamc@223
|
856 (*val () = prefaces "Same?" [("i", p_con env i),
|
adamc@223
|
857 ("c", p_con env c)]*)
|
adamc@223
|
858 val gs6 = unifyCons (env, denv) i c
|
adamc@223
|
859 (*val () = TextIO.print "Yes!\n"*)
|
adamc@223
|
860
|
adamc@223
|
861 val gs7 = unifyCons (env, denv) r (L'.CRecord (dom, []), loc)
|
adamc@223
|
862 in
|
adamc@223
|
863 gs @ gs3 @ gs5 @ gs6 @ gs7
|
adamc@223
|
864 end
|
adamc@223
|
865 else if compatible (cS, appS) then
|
adamc@223
|
866 let
|
adamc@223
|
867 (*val () = prefaces "Same?" [("app", p_con env app),
|
adamc@223
|
868 ("c", p_con env c),
|
adamc@223
|
869 ("app'", p_con env (#1 (hnormCon (env, denv) app)))]*)
|
adamc@223
|
870 val gs6 = unifyCons (env, denv) app c
|
adamc@223
|
871 (*val () = TextIO.print "Yes!\n"*)
|
adamc@223
|
872
|
adamc@223
|
873 val singleton = (L'.CRecord (dom, [(nm, v)]), loc)
|
adamc@223
|
874 val concat = (L'.CConcat (singleton, rest), loc)
|
adamc@223
|
875 (*val () = prefaces "Pre-crew" [("r", p_con env r),
|
adamc@223
|
876 ("concat", p_con env concat)]*)
|
adamc@223
|
877 val gs7 = unifyCons (env, denv) r concat
|
adamc@223
|
878 in
|
adamc@223
|
879 (*prefaces "The crew" [("nm", p_con env nm),
|
adamc@223
|
880 ("v", p_con env v),
|
adamc@223
|
881 ("rest", p_con env rest)];*)
|
adamc@223
|
882
|
adamc@223
|
883 gs @ gs3 @ gs4 @ gs5 @ gs6 @ gs7
|
adamc@223
|
884 end
|
adamc@223
|
885 else
|
adamc@223
|
886 raise ex
|
adamc@223
|
887 end
|
adamc@223
|
888 handle _ => raise ex
|
adamc@223
|
889 in
|
adamc@223
|
890 case (#1 c1, #1 c2) of
|
adamc@223
|
891 (L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r), _) =>
|
adamc@223
|
892 unfold (dom, ran, f, i, r, c2)
|
adamc@223
|
893 | (_, L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r)) =>
|
adamc@223
|
894 unfold (dom, ran, f, i, r, c1)
|
adamc@223
|
895 | _ => raise ex
|
adamc@12
|
896 end
|
adamc@12
|
897
|
adamc@86
|
898 and unifyCons' (env, denv) c1 c2 =
|
adamc@86
|
899 let
|
adamc@86
|
900 val (c1, gs1) = hnormCon (env, denv) c1
|
adamc@86
|
901 val (c2, gs2) = hnormCon (env, denv) c2
|
adamc@86
|
902 in
|
adamc@205
|
903 let
|
adamc@205
|
904 val gs3 = unifyCons'' (env, denv) c1 c2
|
adamc@205
|
905 in
|
adamc@205
|
906 gs1 @ gs2 @ gs3
|
adamc@205
|
907 end
|
adamc@223
|
908 handle ex => guessFold (env, denv) (c1, c2, gs1 @ gs2, ex)
|
adamc@86
|
909 end
|
adamc@11
|
910
|
adamc@205
|
911 and unifyCons'' (env, denv) (c1All as (c1, loc)) (c2All as (c2, _)) =
|
adamc@10
|
912 let
|
adamc@210
|
913 fun err f = raise CUnify' (f (c1All, c2All))
|
adamc@12
|
914
|
adamc@86
|
915 fun isRecord () = unifyRecordCons (env, denv) (c1All, c2All)
|
adamc@10
|
916 in
|
adamc@92
|
917 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
|
adamc@92
|
918 ("c2All", p_con env c2All)];*)
|
adamc@92
|
919
|
adamc@10
|
920 case (c1, c2) of
|
adamc@88
|
921 (L'.CUnit, L'.CUnit) => []
|
adamc@88
|
922
|
adamc@88
|
923 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
|
adamc@86
|
924 unifyCons' (env, denv) d1 d2
|
adamc@86
|
925 @ unifyCons' (env, denv) r1 r2
|
adamc@10
|
926 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
|
adamc@10
|
927 if expl1 <> expl2 then
|
adamc@10
|
928 err CExplicitness
|
adamc@10
|
929 else
|
adamc@10
|
930 (unifyKinds d1 d2;
|
adamc@86
|
931 unifyCons' (E.pushCRel env x1 d1, D.enter denv) r1 r2)
|
adamc@86
|
932 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' (env, denv) r1 r2
|
adamc@10
|
933
|
adamc@10
|
934 | (L'.CRel n1, L'.CRel n2) =>
|
adamc@10
|
935 if n1 = n2 then
|
adamc@86
|
936 []
|
adamc@10
|
937 else
|
adamc@10
|
938 err CIncompatible
|
adamc@10
|
939 | (L'.CNamed n1, L'.CNamed n2) =>
|
adamc@10
|
940 if n1 = n2 then
|
adamc@86
|
941 []
|
adamc@10
|
942 else
|
adamc@10
|
943 err CIncompatible
|
adamc@10
|
944
|
adamc@10
|
945 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
|
adamc@86
|
946 (unifyCons' (env, denv) d1 d2;
|
adamc@86
|
947 unifyCons' (env, denv) r1 r2)
|
adamc@10
|
948 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
|
adamc@10
|
949 (unifyKinds k1 k2;
|
adamc@86
|
950 unifyCons' (E.pushCRel env x1 k1, D.enter denv) c1 c2)
|
adamc@10
|
951
|
adamc@10
|
952 | (L'.CName n1, L'.CName n2) =>
|
adamc@10
|
953 if n1 = n2 then
|
adamc@86
|
954 []
|
adamc@10
|
955 else
|
adamc@10
|
956 err CIncompatible
|
adamc@10
|
957
|
adamc@34
|
958 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
|
adamc@34
|
959 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
|
adamc@86
|
960 []
|
adamc@34
|
961 else
|
adamc@34
|
962 err CIncompatible
|
adamc@34
|
963
|
adamc@207
|
964 | (L'.CTuple cs1, L'.CTuple cs2) =>
|
adamc@207
|
965 ((ListPair.foldlEq (fn (c1, c2, gs) =>
|
adamc@207
|
966 let
|
adamc@207
|
967 val gs' = unifyCons' (env, denv) c1 c2
|
adamc@207
|
968 in
|
adamc@207
|
969 gs' @ gs
|
adamc@207
|
970 end) [] (cs1, cs2))
|
adamc@207
|
971 handle ListPair.UnequalLengths => err CIncompatible)
|
adamc@207
|
972 | (L'.CProj (c1, n1), L'.CProj (c2, n2)) =>
|
adamc@207
|
973 if n1 = n2 then
|
adamc@207
|
974 unifyCons' (env, denv) c1 c2
|
adamc@207
|
975 else
|
adamc@207
|
976 err CIncompatible
|
adamc@207
|
977
|
adamc@86
|
978 | (L'.CError, _) => []
|
adamc@86
|
979 | (_, L'.CError) => []
|
adamc@10
|
980
|
adamc@92
|
981 | (L'.CRecord _, _) => isRecord ()
|
adamc@92
|
982 | (_, L'.CRecord _) => isRecord ()
|
adamc@92
|
983 | (L'.CConcat _, _) => isRecord ()
|
adamc@92
|
984 | (_, L'.CConcat _) => isRecord ()
|
adamc@10
|
985
|
adamc@76
|
986 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
|
adamc@10
|
987 if r1 = r2 then
|
adamc@86
|
988 []
|
adamc@10
|
989 else
|
adamc@10
|
990 (unifyKinds k1 k2;
|
adamc@86
|
991 r1 := SOME c2All;
|
adamc@86
|
992 [])
|
adamc@10
|
993
|
adamc@76
|
994 | (L'.CUnif (_, _, _, r), _) =>
|
adamc@10
|
995 if occursCon r c2All then
|
adamc@10
|
996 err COccursCheckFailed
|
adamc@10
|
997 else
|
adamc@86
|
998 (r := SOME c2All;
|
adamc@86
|
999 [])
|
adamc@76
|
1000 | (_, L'.CUnif (_, _, _, r)) =>
|
adamc@10
|
1001 if occursCon r c1All then
|
adamc@10
|
1002 err COccursCheckFailed
|
adamc@10
|
1003 else
|
adamc@86
|
1004 (r := SOME c1All;
|
adamc@86
|
1005 [])
|
adamc@10
|
1006
|
adamc@71
|
1007 | (L'.CFold (dom1, ran1), L'.CFold (dom2, ran2)) =>
|
adamc@71
|
1008 (unifyKinds dom1 dom2;
|
adamc@86
|
1009 unifyKinds ran1 ran2;
|
adamc@86
|
1010 [])
|
adamc@71
|
1011
|
adamc@10
|
1012 | _ => err CIncompatible
|
adamc@10
|
1013 end
|
adamc@10
|
1014
|
adamc@86
|
1015 and unifyCons (env, denv) c1 c2 =
|
adamc@86
|
1016 unifyCons' (env, denv) c1 c2
|
adamc@10
|
1017 handle CUnify' err => raise CUnify (c1, c2, err)
|
adamc@10
|
1018 | KUnify args => raise CUnify (c1, c2, CKind args)
|
adamc@10
|
1019
|
adamc@10
|
1020 datatype exp_error =
|
adamc@10
|
1021 UnboundExp of ErrorMsg.span * string
|
adamc@34
|
1022 | UnboundStrInExp of ErrorMsg.span * string
|
adamc@10
|
1023 | Unify of L'.exp * L'.con * L'.con * cunify_error
|
adamc@11
|
1024 | Unif of string * L'.con
|
adamc@11
|
1025 | WrongForm of string * L'.exp * L'.con
|
adamc@92
|
1026 | IncompatibleCons of L'.con * L'.con
|
adamc@171
|
1027 | DuplicatePatternVariable of ErrorMsg.span * string
|
adamc@171
|
1028 | PatUnify of L'.pat * L'.con * L'.con * cunify_error
|
adamc@174
|
1029 | UnboundConstructor of ErrorMsg.span * string list * string
|
adamc@171
|
1030 | PatHasArg of ErrorMsg.span
|
adamc@171
|
1031 | PatHasNoArg of ErrorMsg.span
|
adamc@172
|
1032 | Inexhaustive of ErrorMsg.span
|
adamc@175
|
1033 | DuplicatePatField of ErrorMsg.span * string
|
adamc@211
|
1034 | Unresolvable of ErrorMsg.span * L'.con
|
adamc@220
|
1035 | OutOfContext of ErrorMsg.span * (L'.exp * L'.con) option
|
adamc@238
|
1036 | IllegalRec of string * L'.exp
|
adamc@10
|
1037
|
adamc@10
|
1038 fun expError env err =
|
adamc@10
|
1039 case err of
|
adamc@10
|
1040 UnboundExp (loc, s) =>
|
adamc@10
|
1041 ErrorMsg.errorAt loc ("Unbound expression variable " ^ s)
|
adamc@34
|
1042 | UnboundStrInExp (loc, s) =>
|
adamc@34
|
1043 ErrorMsg.errorAt loc ("Unbound structure " ^ s)
|
adamc@10
|
1044 | Unify (e, c1, c2, uerr) =>
|
adamc@10
|
1045 (ErrorMsg.errorAt (#2 e) "Unification failure";
|
adamc@10
|
1046 eprefaces' [("Expression", p_exp env e),
|
adamc@10
|
1047 ("Have con", p_con env c1),
|
adamc@10
|
1048 ("Need con", p_con env c2)];
|
adamc@10
|
1049 cunifyError env uerr)
|
adamc@11
|
1050 | Unif (action, c) =>
|
adamc@11
|
1051 (ErrorMsg.errorAt (#2 c) ("Unification variable blocks " ^ action);
|
adamc@11
|
1052 eprefaces' [("Con", p_con env c)])
|
adamc@11
|
1053 | WrongForm (variety, e, t) =>
|
adamc@11
|
1054 (ErrorMsg.errorAt (#2 e) ("Expression is not a " ^ variety);
|
adamc@11
|
1055 eprefaces' [("Expression", p_exp env e),
|
adamc@11
|
1056 ("Type", p_con env t)])
|
adamc@92
|
1057 | IncompatibleCons (c1, c2) =>
|
adamc@92
|
1058 (ErrorMsg.errorAt (#2 c1) "Incompatible constructors";
|
adamc@92
|
1059 eprefaces' [("Con 1", p_con env c1),
|
adamc@92
|
1060 ("Con 2", p_con env c2)])
|
adamc@171
|
1061 | DuplicatePatternVariable (loc, s) =>
|
adamc@171
|
1062 ErrorMsg.errorAt loc ("Duplicate pattern variable " ^ s)
|
adamc@171
|
1063 | PatUnify (p, c1, c2, uerr) =>
|
adamc@171
|
1064 (ErrorMsg.errorAt (#2 p) "Unification failure for pattern";
|
adamc@171
|
1065 eprefaces' [("Pattern", p_pat env p),
|
adamc@171
|
1066 ("Have con", p_con env c1),
|
adamc@171
|
1067 ("Need con", p_con env c2)];
|
adamc@171
|
1068 cunifyError env uerr)
|
adamc@174
|
1069 | UnboundConstructor (loc, ms, s) =>
|
adamc@174
|
1070 ErrorMsg.errorAt loc ("Unbound constructor " ^ String.concatWith "." (ms @ [s]) ^ " in pattern")
|
adamc@171
|
1071 | PatHasArg loc =>
|
adamc@171
|
1072 ErrorMsg.errorAt loc "Constructor expects no argument but is used with argument"
|
adamc@171
|
1073 | PatHasNoArg loc =>
|
adamc@171
|
1074 ErrorMsg.errorAt loc "Constructor expects argument but is used with no argument"
|
adamc@172
|
1075 | Inexhaustive loc =>
|
adamc@172
|
1076 ErrorMsg.errorAt loc "Inexhaustive 'case'"
|
adamc@175
|
1077 | DuplicatePatField (loc, s) =>
|
adamc@175
|
1078 ErrorMsg.errorAt loc ("Duplicate record field " ^ s ^ " in pattern")
|
adamc@220
|
1079 | OutOfContext (loc, co) =>
|
adamc@220
|
1080 (ErrorMsg.errorAt loc "Type class wildcard occurs out of context";
|
adamc@220
|
1081 Option.app (fn (e, c) => eprefaces' [("Function", p_exp env e),
|
adamc@220
|
1082 ("Type", p_con env c)]) co)
|
adamc@211
|
1083 | Unresolvable (loc, c) =>
|
adamc@211
|
1084 (ErrorMsg.errorAt loc "Can't resolve type class instance";
|
adamc@211
|
1085 eprefaces' [("Class constraint", p_con env c)])
|
adamc@238
|
1086 | IllegalRec (x, e) =>
|
adamc@238
|
1087 (ErrorMsg.errorAt (#2 e) "Illegal 'val rec' righthand side (must be a function abstraction)";
|
adamc@238
|
1088 eprefaces' [("Variable", PD.string x),
|
adamc@238
|
1089 ("Expression", p_exp env e)])
|
adamc@210
|
1090
|
adamc@86
|
1091 fun checkCon (env, denv) e c1 c2 =
|
adamc@86
|
1092 unifyCons (env, denv) c1 c2
|
adamc@10
|
1093 handle CUnify (c1, c2, err) =>
|
adamc@86
|
1094 (expError env (Unify (e, c1, c2, err));
|
adamc@86
|
1095 [])
|
adamc@10
|
1096
|
adamc@171
|
1097 fun checkPatCon (env, denv) p c1 c2 =
|
adamc@171
|
1098 unifyCons (env, denv) c1 c2
|
adamc@171
|
1099 handle CUnify (c1, c2, err) =>
|
adamc@171
|
1100 (expError env (PatUnify (p, c1, c2, err));
|
adamc@171
|
1101 [])
|
adamc@171
|
1102
|
adamc@14
|
1103 fun primType env p =
|
adamc@56
|
1104 case p of
|
adamc@56
|
1105 P.Int _ => !int
|
adamc@56
|
1106 | P.Float _ => !float
|
adamc@56
|
1107 | P.String _ => !string
|
adamc@14
|
1108
|
adamc@71
|
1109 fun recCons (k, nm, v, rest, loc) =
|
adamc@71
|
1110 (L'.CConcat ((L'.CRecord (k, [(nm, v)]), loc),
|
adamc@71
|
1111 rest), loc)
|
adamc@71
|
1112
|
adamc@71
|
1113 fun foldType (dom, loc) =
|
adamc@71
|
1114 (L'.TCFun (L'.Explicit, "ran", (L'.KArrow ((L'.KRecord dom, loc), (L'.KType, loc)), loc),
|
adamc@71
|
1115 (L'.TFun ((L'.TCFun (L'.Explicit, "nm", (L'.KName, loc),
|
adamc@71
|
1116 (L'.TCFun (L'.Explicit, "v", dom,
|
adamc@71
|
1117 (L'.TCFun (L'.Explicit, "rest", (L'.KRecord dom, loc),
|
adamc@71
|
1118 (L'.TFun ((L'.CApp ((L'.CRel 3, loc), (L'.CRel 0, loc)), loc),
|
adamc@71
|
1119 (L'.CApp ((L'.CRel 3, loc),
|
adamc@71
|
1120 recCons (dom,
|
adamc@71
|
1121 (L'.CRel 2, loc),
|
adamc@71
|
1122 (L'.CRel 1, loc),
|
adamc@71
|
1123 (L'.CRel 0, loc),
|
adamc@71
|
1124 loc)), loc)), loc)),
|
adamc@71
|
1125 loc)), loc)), loc),
|
adamc@71
|
1126 (L'.TFun ((L'.CApp ((L'.CRel 0, loc), (L'.CRecord (dom, []), loc)), loc),
|
adamc@71
|
1127 (L'.TCFun (L'.Explicit, "r", (L'.KRecord dom, loc),
|
adamc@71
|
1128 (L'.CApp ((L'.CRel 1, loc), (L'.CRel 0, loc)), loc)), loc)),
|
adamc@71
|
1129 loc)), loc)), loc)
|
adamc@71
|
1130
|
adamc@228
|
1131 datatype constraint =
|
adamc@228
|
1132 Disjoint of D.goal
|
adamc@228
|
1133 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
|
adamc@228
|
1134
|
adamc@228
|
1135 val enD = map Disjoint
|
adamc@228
|
1136
|
adamc@86
|
1137 fun elabHead (env, denv) (e as (_, loc)) t =
|
adamc@15
|
1138 let
|
adamc@15
|
1139 fun unravel (t, e) =
|
adamc@86
|
1140 let
|
adamc@86
|
1141 val (t, gs) = hnormCon (env, denv) t
|
adamc@86
|
1142 in
|
adamc@86
|
1143 case t of
|
adamc@86
|
1144 (L'.TCFun (L'.Implicit, x, k, t'), _) =>
|
adamc@86
|
1145 let
|
adamc@86
|
1146 val u = cunif (loc, k)
|
adamc@86
|
1147
|
adamc@86
|
1148 val (e, t, gs') = unravel (subConInCon (0, u) t',
|
adamc@86
|
1149 (L'.ECApp (e, u), loc))
|
adamc@86
|
1150 in
|
adamc@228
|
1151 (e, t, enD gs @ gs')
|
adamc@86
|
1152 end
|
adamc@228
|
1153 | _ => (e, t, enD gs)
|
adamc@86
|
1154 end
|
adamc@15
|
1155 in
|
adamc@15
|
1156 unravel (t, e)
|
adamc@15
|
1157 end
|
adamc@15
|
1158
|
adamc@174
|
1159 fun elabPat (pAll as (p, loc), (env, denv, bound)) =
|
adamc@171
|
1160 let
|
adamc@171
|
1161 val perror = (L'.PWild, loc)
|
adamc@171
|
1162 val terror = (L'.CError, loc)
|
adamc@171
|
1163 val pterror = (perror, terror)
|
adamc@171
|
1164 val rerror = (pterror, (env, bound))
|
adamc@171
|
1165
|
adamc@191
|
1166 fun pcon (pc, po, xs, to, dn, dk) =
|
adamc@188
|
1167 case (po, to) of
|
adamc@188
|
1168 (NONE, SOME _) => (expError env (PatHasNoArg loc);
|
adamc@188
|
1169 rerror)
|
adamc@188
|
1170 | (SOME _, NONE) => (expError env (PatHasArg loc);
|
adamc@188
|
1171 rerror)
|
adamc@191
|
1172 | (NONE, NONE) =>
|
adamc@191
|
1173 let
|
adamc@191
|
1174 val k = (L'.KType, loc)
|
adamc@191
|
1175 val unifs = map (fn _ => cunif (loc, k)) xs
|
adamc@191
|
1176 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
|
adamc@191
|
1177 in
|
adamc@191
|
1178 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
|
adamc@191
|
1179 (env, bound))
|
adamc@191
|
1180 end
|
adamc@188
|
1181 | (SOME p, SOME t) =>
|
adamc@188
|
1182 let
|
adamc@188
|
1183 val ((p', pt), (env, bound)) = elabPat (p, (env, denv, bound))
|
adamc@191
|
1184
|
adamc@191
|
1185 val k = (L'.KType, loc)
|
adamc@191
|
1186 val unifs = map (fn _ => cunif (loc, k)) xs
|
adamc@194
|
1187 val nxs = length unifs - 1
|
adamc@194
|
1188 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
|
adamc@191
|
1189 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
|
adamc@188
|
1190 in
|
adamc@191
|
1191 ignore (checkPatCon (env, denv) p' pt t);
|
adamc@191
|
1192 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
|
adamc@188
|
1193 (env, bound))
|
adamc@188
|
1194 end
|
adamc@171
|
1195 in
|
adamc@171
|
1196 case p of
|
adamc@171
|
1197 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
|
adamc@171
|
1198 (env, bound))
|
adamc@171
|
1199 | L.PVar x =>
|
adamc@171
|
1200 let
|
adamc@171
|
1201 val t = if SS.member (bound, x) then
|
adamc@171
|
1202 (expError env (DuplicatePatternVariable (loc, x));
|
adamc@171
|
1203 terror)
|
adamc@171
|
1204 else
|
adamc@171
|
1205 cunif (loc, (L'.KType, loc))
|
adamc@171
|
1206 in
|
adamc@182
|
1207 (((L'.PVar (x, t), loc), t),
|
adamc@171
|
1208 (E.pushERel env x t, SS.add (bound, x)))
|
adamc@171
|
1209 end
|
adamc@173
|
1210 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
|
adamc@173
|
1211 (env, bound))
|
adamc@171
|
1212 | L.PCon ([], x, po) =>
|
adamc@171
|
1213 (case E.lookupConstructor env x of
|
adamc@174
|
1214 NONE => (expError env (UnboundConstructor (loc, [], x));
|
adamc@171
|
1215 rerror)
|
adamc@191
|
1216 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
|
adamc@174
|
1217 | L.PCon (m1 :: ms, x, po) =>
|
adamc@174
|
1218 (case E.lookupStr env m1 of
|
adamc@174
|
1219 NONE => (expError env (UnboundStrInExp (loc, m1));
|
adamc@174
|
1220 rerror)
|
adamc@174
|
1221 | SOME (n, sgn) =>
|
adamc@174
|
1222 let
|
adamc@174
|
1223 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@174
|
1224 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@182
|
1225 NONE => raise Fail "elabPat: Unknown substructure"
|
adamc@174
|
1226 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@174
|
1227 ((L'.StrVar n, loc), sgn) ms
|
adamc@174
|
1228 in
|
adamc@174
|
1229 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
|
adamc@174
|
1230 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
|
adamc@174
|
1231 rerror)
|
adamc@191
|
1232 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
|
adamc@174
|
1233 end)
|
adamc@174
|
1234
|
adamc@175
|
1235 | L.PRecord (xps, flex) =>
|
adamc@175
|
1236 let
|
adamc@175
|
1237 val (xpts, (env, bound, _)) =
|
adamc@175
|
1238 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
|
adamc@175
|
1239 let
|
adamc@175
|
1240 val ((p', t), (env, bound)) = elabPat (p, (env, denv, bound))
|
adamc@175
|
1241 in
|
adamc@175
|
1242 if SS.member (fbound, x) then
|
adamc@175
|
1243 expError env (DuplicatePatField (loc, x))
|
adamc@175
|
1244 else
|
adamc@175
|
1245 ();
|
adamc@175
|
1246 ((x, p', t), (env, bound, SS.add (fbound, x)))
|
adamc@175
|
1247 end)
|
adamc@175
|
1248 (env, bound, SS.empty) xps
|
adamc@175
|
1249
|
adamc@175
|
1250 val k = (L'.KType, loc)
|
adamc@175
|
1251 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
|
adamc@176
|
1252 val c =
|
adamc@175
|
1253 if flex then
|
adamc@176
|
1254 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
|
adamc@175
|
1255 else
|
adamc@176
|
1256 c
|
adamc@175
|
1257 in
|
adamc@182
|
1258 (((L'.PRecord xpts, loc),
|
adamc@175
|
1259 (L'.TRecord c, loc)),
|
adamc@175
|
1260 (env, bound))
|
adamc@175
|
1261 end
|
adamc@175
|
1262
|
adamc@171
|
1263 end
|
adamc@171
|
1264
|
adamc@172
|
1265 datatype coverage =
|
adamc@172
|
1266 Wild
|
adamc@173
|
1267 | None
|
adamc@172
|
1268 | Datatype of coverage IM.map
|
adamc@175
|
1269 | Record of coverage SM.map list
|
adamc@172
|
1270
|
adamc@172
|
1271 fun exhaustive (env, denv, t, ps) =
|
adamc@172
|
1272 let
|
adamc@172
|
1273 fun pcCoverage pc =
|
adamc@172
|
1274 case pc of
|
adamc@172
|
1275 L'.PConVar n => n
|
adamc@174
|
1276 | L'.PConProj (m1, ms, x) =>
|
adamc@174
|
1277 let
|
adamc@174
|
1278 val (str, sgn) = E.chaseMpath env (m1, ms)
|
adamc@174
|
1279 in
|
adamc@174
|
1280 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
|
adamc@174
|
1281 NONE => raise Fail "exhaustive: Can't project constructor"
|
adamc@191
|
1282 | SOME (_, n, _, _, _) => n
|
adamc@174
|
1283 end
|
adamc@172
|
1284
|
adamc@172
|
1285 fun coverage (p, _) =
|
adamc@172
|
1286 case p of
|
adamc@172
|
1287 L'.PWild => Wild
|
adamc@172
|
1288 | L'.PVar _ => Wild
|
adamc@173
|
1289 | L'.PPrim _ => None
|
adamc@191
|
1290 | L'.PCon (_, pc, _, NONE) => Datatype (IM.insert (IM.empty, pcCoverage pc, Wild))
|
adamc@191
|
1291 | L'.PCon (_, pc, _, SOME p) => Datatype (IM.insert (IM.empty, pcCoverage pc, coverage p))
|
adamc@182
|
1292 | L'.PRecord xps => Record [foldl (fn ((x, p, _), fmap) =>
|
adamc@182
|
1293 SM.insert (fmap, x, coverage p)) SM.empty xps]
|
adamc@176
|
1294
|
adamc@172
|
1295 fun merge (c1, c2) =
|
adamc@172
|
1296 case (c1, c2) of
|
adamc@173
|
1297 (None, _) => c2
|
adamc@173
|
1298 | (_, None) => c1
|
adamc@173
|
1299
|
adamc@173
|
1300 | (Wild, _) => Wild
|
adamc@172
|
1301 | (_, Wild) => Wild
|
adamc@172
|
1302
|
adamc@172
|
1303 | (Datatype cm1, Datatype cm2) => Datatype (IM.unionWith merge (cm1, cm2))
|
adamc@172
|
1304
|
adamc@175
|
1305 | (Record fm1, Record fm2) => Record (fm1 @ fm2)
|
adamc@175
|
1306
|
adamc@175
|
1307 | _ => None
|
adamc@175
|
1308
|
adamc@172
|
1309 fun combinedCoverage ps =
|
adamc@172
|
1310 case ps of
|
adamc@172
|
1311 [] => raise Fail "Empty pattern list for coverage checking"
|
adamc@172
|
1312 | [p] => coverage p
|
adamc@172
|
1313 | p :: ps => merge (coverage p, combinedCoverage ps)
|
adamc@172
|
1314
|
adamc@175
|
1315 fun enumerateCases t =
|
adamc@175
|
1316 let
|
adamc@175
|
1317 fun dtype cons =
|
adamc@175
|
1318 ListUtil.mapConcat (fn (_, n, to) =>
|
adamc@175
|
1319 case to of
|
adamc@175
|
1320 NONE => [Datatype (IM.insert (IM.empty, n, Wild))]
|
adamc@175
|
1321 | SOME t => map (fn c => Datatype (IM.insert (IM.empty, n, c)))
|
adamc@175
|
1322 (enumerateCases t)) cons
|
adamc@175
|
1323 in
|
adamc@175
|
1324 case #1 (#1 (hnormCon (env, denv) t)) of
|
adamc@175
|
1325 L'.CNamed n =>
|
adamc@175
|
1326 (let
|
adamc@175
|
1327 val dt = E.lookupDatatype env n
|
adamc@175
|
1328 val cons = E.constructors dt
|
adamc@175
|
1329 in
|
adamc@175
|
1330 dtype cons
|
adamc@175
|
1331 end handle E.UnboundNamed _ => [Wild])
|
adamc@175
|
1332 | L'.TRecord c =>
|
adamc@175
|
1333 (case #1 (#1 (hnormCon (env, denv) c)) of
|
adamc@175
|
1334 L'.CRecord (_, xts) =>
|
adamc@175
|
1335 let
|
adamc@175
|
1336 val xts = map (fn (x, t) => (#1 (hnormCon (env, denv) x), t)) xts
|
adamc@175
|
1337
|
adamc@175
|
1338 fun exponentiate fs =
|
adamc@175
|
1339 case fs of
|
adamc@175
|
1340 [] => [SM.empty]
|
adamc@175
|
1341 | ((L'.CName x, _), t) :: rest =>
|
adamc@175
|
1342 let
|
adamc@175
|
1343 val this = enumerateCases t
|
adamc@175
|
1344 val rest = exponentiate rest
|
adamc@175
|
1345 in
|
adamc@175
|
1346 ListUtil.mapConcat (fn fmap =>
|
adamc@175
|
1347 map (fn c => SM.insert (fmap, x, c)) this) rest
|
adamc@175
|
1348 end
|
adamc@175
|
1349 | _ => raise Fail "exponentiate: Not CName"
|
adamc@175
|
1350 in
|
adamc@175
|
1351 if List.exists (fn ((L'.CName _, _), _) => false
|
adamc@175
|
1352 | (c, _) => true) xts then
|
adamc@175
|
1353 [Wild]
|
adamc@175
|
1354 else
|
adamc@175
|
1355 map (fn ls => Record [ls]) (exponentiate xts)
|
adamc@175
|
1356 end
|
adamc@175
|
1357 | _ => [Wild])
|
adamc@175
|
1358 | _ => [Wild]
|
adamc@175
|
1359 end
|
adamc@175
|
1360
|
adamc@175
|
1361 fun coverageImp (c1, c2) =
|
adamc@175
|
1362 case (c1, c2) of
|
adamc@175
|
1363 (Wild, _) => true
|
adamc@175
|
1364
|
adamc@175
|
1365 | (Datatype cmap1, Datatype cmap2) =>
|
adamc@175
|
1366 List.all (fn (n, c2) =>
|
adamc@175
|
1367 case IM.find (cmap1, n) of
|
adamc@175
|
1368 NONE => false
|
adamc@175
|
1369 | SOME c1 => coverageImp (c1, c2)) (IM.listItemsi cmap2)
|
adamc@175
|
1370
|
adamc@175
|
1371 | (Record fmaps1, Record fmaps2) =>
|
adamc@175
|
1372 List.all (fn fmap2 =>
|
adamc@175
|
1373 List.exists (fn fmap1 =>
|
adamc@175
|
1374 List.all (fn (x, c2) =>
|
adamc@175
|
1375 case SM.find (fmap1, x) of
|
adamc@175
|
1376 NONE => true
|
adamc@175
|
1377 | SOME c1 => coverageImp (c1, c2))
|
adamc@175
|
1378 (SM.listItemsi fmap2))
|
adamc@175
|
1379 fmaps1) fmaps2
|
adamc@175
|
1380
|
adamc@175
|
1381 | _ => false
|
adamc@175
|
1382
|
adamc@172
|
1383 fun isTotal (c, t) =
|
adamc@172
|
1384 case c of
|
adamc@173
|
1385 None => (false, [])
|
adamc@173
|
1386 | Wild => (true, [])
|
adamc@172
|
1387 | Datatype cm =>
|
adamc@172
|
1388 let
|
adamc@172
|
1389 val ((t, _), gs) = hnormCon (env, denv) t
|
adamc@174
|
1390
|
adamc@174
|
1391 fun dtype cons =
|
adamc@174
|
1392 foldl (fn ((_, n, to), (total, gs)) =>
|
adamc@174
|
1393 case IM.find (cm, n) of
|
adamc@174
|
1394 NONE => (false, gs)
|
adamc@174
|
1395 | SOME c' =>
|
adamc@174
|
1396 case to of
|
adamc@174
|
1397 NONE => (total, gs)
|
adamc@174
|
1398 | SOME t' =>
|
adamc@174
|
1399 let
|
adamc@174
|
1400 val (total, gs') = isTotal (c', t')
|
adamc@174
|
1401 in
|
adamc@174
|
1402 (total, gs' @ gs)
|
adamc@174
|
1403 end)
|
adamc@174
|
1404 (true, gs) cons
|
adamc@191
|
1405
|
adamc@191
|
1406 fun unapp t =
|
adamc@191
|
1407 case t of
|
adamc@191
|
1408 L'.CApp ((t, _), _) => unapp t
|
adamc@191
|
1409 | _ => t
|
adamc@172
|
1410 in
|
adamc@191
|
1411 case unapp t of
|
adamc@172
|
1412 L'.CNamed n =>
|
adamc@172
|
1413 let
|
adamc@172
|
1414 val dt = E.lookupDatatype env n
|
adamc@172
|
1415 val cons = E.constructors dt
|
adamc@172
|
1416 in
|
adamc@174
|
1417 dtype cons
|
adamc@174
|
1418 end
|
adamc@174
|
1419 | L'.CModProj (m1, ms, x) =>
|
adamc@174
|
1420 let
|
adamc@174
|
1421 val (str, sgn) = E.chaseMpath env (m1, ms)
|
adamc@174
|
1422 in
|
adamc@174
|
1423 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
|
adamc@174
|
1424 NONE => raise Fail "isTotal: Can't project datatype"
|
adamc@191
|
1425 | SOME (_, cons) => dtype cons
|
adamc@172
|
1426 end
|
adamc@172
|
1427 | L'.CError => (true, gs)
|
adamc@172
|
1428 | _ => raise Fail "isTotal: Not a datatype"
|
adamc@172
|
1429 end
|
adamc@175
|
1430 | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases t), [])
|
adamc@172
|
1431 in
|
adamc@172
|
1432 isTotal (combinedCoverage ps, t)
|
adamc@172
|
1433 end
|
adamc@172
|
1434
|
adamc@217
|
1435 fun unmodCon env (c, loc) =
|
adamc@217
|
1436 case c of
|
adamc@217
|
1437 L'.CNamed n =>
|
adamc@217
|
1438 (case E.lookupCNamed env n of
|
adamc@217
|
1439 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
|
adamc@217
|
1440 | _ => (c, loc))
|
adamc@217
|
1441 | L'.CModProj (m1, ms, x) =>
|
adamc@217
|
1442 let
|
adamc@217
|
1443 val (str, sgn) = E.chaseMpath env (m1, ms)
|
adamc@217
|
1444 in
|
adamc@217
|
1445 case E.projectCon env {str = str, sgn = sgn, field = x} of
|
adamc@217
|
1446 NONE => raise Fail "unmodCon: Can't projectCon"
|
adamc@217
|
1447 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
|
adamc@217
|
1448 | _ => (c, loc)
|
adamc@217
|
1449 end
|
adamc@217
|
1450 | _ => (c, loc)
|
adamc@217
|
1451
|
adamc@217
|
1452 fun normClassConstraint envs (c, loc) =
|
adamc@217
|
1453 case c of
|
adamc@217
|
1454 L'.CApp (f, x) =>
|
adamc@217
|
1455 let
|
adamc@217
|
1456 val f = unmodCon (#1 envs) f
|
adamc@217
|
1457 val (x, gs) = hnormCon envs x
|
adamc@217
|
1458 in
|
adamc@217
|
1459 ((L'.CApp (f, x), loc), gs)
|
adamc@217
|
1460 end
|
adamc@217
|
1461 | _ => ((c, loc), [])
|
adamc@216
|
1462
|
adamc@92
|
1463 fun elabExp (env, denv) (eAll as (e, loc)) =
|
adamc@91
|
1464 let
|
adamc@92
|
1465
|
adamc@92
|
1466 in
|
adamc@92
|
1467 (*eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
|
adamc@10
|
1468
|
adamc@91
|
1469 case e of
|
adamc@91
|
1470 L.EAnnot (e, t) =>
|
adamc@91
|
1471 let
|
adamc@91
|
1472 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@91
|
1473 val (t', _, gs2) = elabCon (env, denv) t
|
adamc@91
|
1474 val gs3 = checkCon (env, denv) e' et t'
|
adamc@91
|
1475 in
|
adamc@228
|
1476 (e', t', gs1 @ enD gs2 @ enD gs3)
|
adamc@91
|
1477 end
|
adamc@34
|
1478
|
adamc@91
|
1479 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
|
adamc@91
|
1480 | L.EVar ([], s) =>
|
adamc@91
|
1481 (case E.lookupE env s of
|
adamc@91
|
1482 E.NotBound =>
|
adamc@91
|
1483 (expError env (UnboundExp (loc, s));
|
adamc@91
|
1484 (eerror, cerror, []))
|
adamc@91
|
1485 | E.Rel (n, t) => ((L'.ERel n, loc), t, [])
|
adamc@191
|
1486 | E.Named (n, t) =>
|
adamc@191
|
1487 if Char.isUpper (String.sub (s, 0)) then
|
adamc@191
|
1488 elabHead (env, denv) (L'.ENamed n, loc) t
|
adamc@191
|
1489 else
|
adamc@191
|
1490 ((L'.ENamed n, loc), t, []))
|
adamc@91
|
1491 | L.EVar (m1 :: ms, s) =>
|
adamc@91
|
1492 (case E.lookupStr env m1 of
|
adamc@91
|
1493 NONE => (expError env (UnboundStrInExp (loc, m1));
|
adamc@91
|
1494 (eerror, cerror, []))
|
adamc@91
|
1495 | SOME (n, sgn) =>
|
adamc@91
|
1496 let
|
adamc@91
|
1497 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@91
|
1498 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@91
|
1499 NONE => (conError env (UnboundStrInCon (loc, m));
|
adamc@91
|
1500 (strerror, sgnerror))
|
adamc@91
|
1501 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@91
|
1502 ((L'.StrVar n, loc), sgn) ms
|
adamc@10
|
1503
|
adamc@91
|
1504 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
|
adamc@91
|
1505 NONE => (expError env (UnboundExp (loc, s));
|
adamc@91
|
1506 cerror)
|
adamc@91
|
1507 | SOME t => t
|
adamc@91
|
1508 in
|
adamc@91
|
1509 ((L'.EModProj (n, ms, s), loc), t, [])
|
adamc@91
|
1510 end)
|
adamc@86
|
1511
|
adamc@211
|
1512 | L.EApp (e1, (L.EWild, _)) =>
|
adamc@210
|
1513 let
|
adamc@210
|
1514 val (e1', t1, gs1) = elabExp (env, denv) e1
|
adamc@210
|
1515 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
|
adamc@210
|
1516 val (t1, gs3) = hnormCon (env, denv) t1
|
adamc@210
|
1517 in
|
adamc@210
|
1518 case t1 of
|
adamc@211
|
1519 (L'.TFun (dom, ran), _) =>
|
adamc@216
|
1520 let
|
adamc@216
|
1521 val (dom, gs4) = normClassConstraint (env, denv) dom
|
adamc@216
|
1522 in
|
adamc@216
|
1523 case E.resolveClass env dom of
|
adamc@228
|
1524 NONE =>
|
adamc@228
|
1525 let
|
adamc@228
|
1526 val r = ref NONE
|
adamc@228
|
1527 in
|
adamc@233
|
1528 ((L'.EApp (e1', (L'.EUnif r, loc)), loc),
|
adamc@233
|
1529 ran, [TypeClass (env, dom, r, loc)])
|
adamc@228
|
1530 end
|
adamc@228
|
1531 | SOME pf => ((L'.EApp (e1', pf), loc), ran, gs1 @ gs2 @ enD gs3 @ enD gs4)
|
adamc@216
|
1532 end
|
adamc@220
|
1533 | _ => (expError env (OutOfContext (loc, SOME (e1', t1)));
|
adamc@211
|
1534 (eerror, cerror, []))
|
adamc@210
|
1535 end
|
adamc@220
|
1536 | L.EWild => (expError env (OutOfContext (loc, NONE));
|
adamc@211
|
1537 (eerror, cerror, []))
|
adamc@210
|
1538
|
adamc@91
|
1539 | L.EApp (e1, e2) =>
|
adamc@91
|
1540 let
|
adamc@91
|
1541 val (e1', t1, gs1) = elabExp (env, denv) e1
|
adamc@91
|
1542 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
|
adamc@91
|
1543 val (e2', t2, gs3) = elabExp (env, denv) e2
|
adamc@71
|
1544
|
adamc@91
|
1545 val dom = cunif (loc, ktype)
|
adamc@91
|
1546 val ran = cunif (loc, ktype)
|
adamc@91
|
1547 val t = (L'.TFun (dom, ran), dummy)
|
adamc@91
|
1548
|
adamc@91
|
1549 val gs4 = checkCon (env, denv) e1' t1 t
|
adamc@91
|
1550 val gs5 = checkCon (env, denv) e2' t2 dom
|
adamc@205
|
1551
|
adamc@228
|
1552 val gs = gs1 @ gs2 @ gs3 @ enD gs4 @ enD gs5
|
adamc@91
|
1553 in
|
adamc@205
|
1554 ((L'.EApp (e1', e2'), loc), ran, gs)
|
adamc@91
|
1555 end
|
adamc@91
|
1556 | L.EAbs (x, to, e) =>
|
adamc@91
|
1557 let
|
adamc@91
|
1558 val (t', gs1) = case to of
|
adamc@91
|
1559 NONE => (cunif (loc, ktype), [])
|
adamc@91
|
1560 | SOME t =>
|
adamc@91
|
1561 let
|
adamc@91
|
1562 val (t', tk, gs) = elabCon (env, denv) t
|
adamc@91
|
1563 in
|
adamc@91
|
1564 checkKind env t' tk ktype;
|
adamc@91
|
1565 (t', gs)
|
adamc@91
|
1566 end
|
adamc@91
|
1567 val (e', et, gs2) = elabExp (E.pushERel env x t', denv) e
|
adamc@91
|
1568 in
|
adamc@91
|
1569 ((L'.EAbs (x, t', et, e'), loc),
|
adamc@91
|
1570 (L'.TFun (t', et), loc),
|
adamc@228
|
1571 enD gs1 @ gs2)
|
adamc@91
|
1572 end
|
adamc@91
|
1573 | L.ECApp (e, c) =>
|
adamc@91
|
1574 let
|
adamc@91
|
1575 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@91
|
1576 val (e', et, gs2) = elabHead (env, denv) e' et
|
adamc@91
|
1577 val (c', ck, gs3) = elabCon (env, denv) c
|
adamc@91
|
1578 val ((et', _), gs4) = hnormCon (env, denv) et
|
adamc@91
|
1579 in
|
adamc@91
|
1580 case et' of
|
adamc@91
|
1581 L'.CError => (eerror, cerror, [])
|
adamc@91
|
1582 | L'.TCFun (_, _, k, eb) =>
|
adamc@91
|
1583 let
|
adamc@91
|
1584 val () = checkKind env c' ck k
|
adamc@91
|
1585 val eb' = subConInCon (0, c') eb
|
adamc@91
|
1586 handle SynUnif => (expError env (Unif ("substitution", eb));
|
adamc@91
|
1587 cerror)
|
adamc@91
|
1588 in
|
adamc@228
|
1589 ((L'.ECApp (e', c'), loc), eb', gs1 @ gs2 @ enD gs3 @ enD gs4)
|
adamc@91
|
1590 end
|
adamc@91
|
1591
|
adamc@91
|
1592 | L'.CUnif _ =>
|
adamc@91
|
1593 (expError env (Unif ("application", et));
|
adamc@91
|
1594 (eerror, cerror, []))
|
adamc@91
|
1595
|
adamc@91
|
1596 | _ =>
|
adamc@91
|
1597 (expError env (WrongForm ("constructor function", e', et));
|
adamc@91
|
1598 (eerror, cerror, []))
|
adamc@91
|
1599 end
|
adamc@91
|
1600 | L.ECAbs (expl, x, k, e) =>
|
adamc@91
|
1601 let
|
adamc@91
|
1602 val expl' = elabExplicitness expl
|
adamc@91
|
1603 val k' = elabKind k
|
adamc@91
|
1604 val (e', et, gs) = elabExp (E.pushCRel env x k', D.enter denv) e
|
adamc@91
|
1605 in
|
adamc@91
|
1606 ((L'.ECAbs (expl', x, k', e'), loc),
|
adamc@91
|
1607 (L'.TCFun (expl', x, k', et), loc),
|
adamc@91
|
1608 gs)
|
adamc@91
|
1609 end
|
adamc@91
|
1610
|
adamc@91
|
1611 | L.EDisjoint (c1, c2, e) =>
|
adamc@91
|
1612 let
|
adamc@91
|
1613 val (c1', k1, gs1) = elabCon (env, denv) c1
|
adamc@91
|
1614 val (c2', k2, gs2) = elabCon (env, denv) c2
|
adamc@91
|
1615
|
adamc@91
|
1616 val ku1 = kunif loc
|
adamc@91
|
1617 val ku2 = kunif loc
|
adamc@91
|
1618
|
adamc@91
|
1619 val (denv', gs3) = D.assert env denv (c1', c2')
|
adamc@91
|
1620 val (e', t, gs4) = elabExp (env, denv') e
|
adamc@91
|
1621 in
|
adamc@91
|
1622 checkKind env c1' k1 (L'.KRecord ku1, loc);
|
adamc@91
|
1623 checkKind env c2' k2 (L'.KRecord ku2, loc);
|
adamc@91
|
1624
|
adamc@228
|
1625 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ enD gs3 @ gs4)
|
adamc@91
|
1626 end
|
adamc@91
|
1627
|
adamc@91
|
1628 | L.ERecord xes =>
|
adamc@91
|
1629 let
|
adamc@91
|
1630 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
|
adamc@91
|
1631 let
|
adamc@91
|
1632 val (x', xk, gs1) = elabCon (env, denv) x
|
adamc@91
|
1633 val (e', et, gs2) = elabExp (env, denv) e
|
adamc@91
|
1634 in
|
adamc@91
|
1635 checkKind env x' xk kname;
|
adamc@228
|
1636 ((x', e', et), enD gs1 @ gs2 @ gs)
|
adamc@91
|
1637 end)
|
adamc@91
|
1638 [] xes
|
adamc@91
|
1639
|
adamc@91
|
1640 val k = (L'.KType, loc)
|
adamc@91
|
1641
|
adamc@91
|
1642 fun prove (xets, gs) =
|
adamc@91
|
1643 case xets of
|
adamc@91
|
1644 [] => gs
|
adamc@91
|
1645 | (x, _, t) :: rest =>
|
adamc@91
|
1646 let
|
adamc@91
|
1647 val xc = (x, t)
|
adamc@91
|
1648 val r1 = (L'.CRecord (k, [xc]), loc)
|
adamc@91
|
1649 val gs = foldl (fn ((x', _, t'), gs) =>
|
adamc@91
|
1650 let
|
adamc@91
|
1651 val xc' = (x', t')
|
adamc@91
|
1652 val r2 = (L'.CRecord (k, [xc']), loc)
|
adamc@91
|
1653 in
|
adamc@91
|
1654 D.prove env denv (r1, r2, loc) @ gs
|
adamc@91
|
1655 end)
|
adamc@91
|
1656 gs rest
|
adamc@91
|
1657 in
|
adamc@91
|
1658 prove (rest, gs)
|
adamc@91
|
1659 end
|
adamc@228
|
1660
|
adamc@228
|
1661 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
|
adamc@228
|
1662 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
|
adamc@91
|
1663 in
|
adamc@91
|
1664 ((L'.ERecord xes', loc),
|
adamc@91
|
1665 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
|
adamc@228
|
1666 enD (prove (xes', gsD)) @ gsO)
|
adamc@91
|
1667 end
|
adamc@91
|
1668
|
adamc@91
|
1669 | L.EField (e, c) =>
|
adamc@91
|
1670 let
|
adamc@91
|
1671 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@91
|
1672 val (c', ck, gs2) = elabCon (env, denv) c
|
adamc@91
|
1673
|
adamc@91
|
1674 val ft = cunif (loc, ktype)
|
adamc@91
|
1675 val rest = cunif (loc, ktype_record)
|
adamc@91
|
1676 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
|
adamc@91
|
1677
|
adamc@91
|
1678 val gs3 =
|
adamc@91
|
1679 checkCon (env, denv) e' et
|
adamc@91
|
1680 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
|
adamc@91
|
1681 val gs4 = D.prove env denv (first, rest, loc)
|
adamc@91
|
1682 in
|
adamc@228
|
1683 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3 @ enD gs4)
|
adamc@91
|
1684 end
|
adamc@91
|
1685
|
adamc@149
|
1686 | L.ECut (e, c) =>
|
adamc@149
|
1687 let
|
adamc@149
|
1688 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@149
|
1689 val (c', ck, gs2) = elabCon (env, denv) c
|
adamc@149
|
1690
|
adamc@149
|
1691 val ft = cunif (loc, ktype)
|
adamc@149
|
1692 val rest = cunif (loc, ktype_record)
|
adamc@149
|
1693 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
|
adamc@149
|
1694
|
adamc@149
|
1695 val gs3 =
|
adamc@149
|
1696 checkCon (env, denv) e' et
|
adamc@149
|
1697 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
|
adamc@149
|
1698 val gs4 = D.prove env denv (first, rest, loc)
|
adamc@149
|
1699 in
|
adamc@228
|
1700 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
|
adamc@228
|
1701 gs1 @ enD gs2 @ enD gs3 @ enD gs4)
|
adamc@149
|
1702 end
|
adamc@149
|
1703
|
adamc@91
|
1704 | L.EFold =>
|
adamc@91
|
1705 let
|
adamc@91
|
1706 val dom = kunif loc
|
adamc@91
|
1707 in
|
adamc@91
|
1708 ((L'.EFold dom, loc), foldType (dom, loc), [])
|
adamc@91
|
1709 end
|
adamc@170
|
1710
|
adamc@171
|
1711 | L.ECase (e, pes) =>
|
adamc@171
|
1712 let
|
adamc@171
|
1713 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@171
|
1714 val result = cunif (loc, (L'.KType, loc))
|
adamc@171
|
1715 val (pes', gs) = ListUtil.foldlMap
|
adamc@171
|
1716 (fn ((p, e), gs) =>
|
adamc@171
|
1717 let
|
adamc@174
|
1718 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
|
adamc@171
|
1719
|
adamc@171
|
1720 val gs1 = checkPatCon (env, denv) p' pt et
|
adamc@171
|
1721 val (e', et, gs2) = elabExp (env, denv) e
|
adamc@171
|
1722 val gs3 = checkCon (env, denv) e' et result
|
adamc@171
|
1723 in
|
adamc@228
|
1724 ((p', e'), enD gs1 @ gs2 @ enD gs3 @ gs)
|
adamc@171
|
1725 end)
|
adamc@171
|
1726 gs1 pes
|
adamc@172
|
1727
|
adamc@172
|
1728 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
|
adamc@171
|
1729 in
|
adamc@172
|
1730 if total then
|
adamc@172
|
1731 ()
|
adamc@172
|
1732 else
|
adamc@172
|
1733 expError env (Inexhaustive loc);
|
adamc@172
|
1734
|
adamc@228
|
1735 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, enD gs' @ gs)
|
adamc@171
|
1736 end
|
adamc@91
|
1737 end
|
adamc@12
|
1738
|
adamc@12
|
1739
|
adamc@6
|
1740 datatype decl_error =
|
adamc@91
|
1741 KunifsRemain of L'.decl list
|
adamc@91
|
1742 | CunifsRemain of L'.decl list
|
adamc@91
|
1743
|
adamc@91
|
1744 fun lspan [] = ErrorMsg.dummySpan
|
adamc@91
|
1745 | lspan ((_, loc) :: _) = loc
|
adamc@6
|
1746
|
adamc@6
|
1747 fun declError env err =
|
adamc@6
|
1748 case err of
|
adamc@91
|
1749 KunifsRemain ds =>
|
adamc@91
|
1750 (ErrorMsg.errorAt (lspan ds) "Some kind unification variables are undetermined in declaration";
|
adamc@91
|
1751 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
|
adamc@91
|
1752 | CunifsRemain ds =>
|
adamc@91
|
1753 (ErrorMsg.errorAt (lspan ds) "Some constructor unification variables are undetermined in declaration";
|
adamc@91
|
1754 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
|
adamc@6
|
1755
|
adamc@31
|
1756 datatype sgn_error =
|
adamc@31
|
1757 UnboundSgn of ErrorMsg.span * string
|
adamc@31
|
1758 | UnmatchedSgi of L'.sgn_item
|
adamc@31
|
1759 | SgiWrongKind of L'.sgn_item * L'.kind * L'.sgn_item * L'.kind * kunify_error
|
adamc@31
|
1760 | SgiWrongCon of L'.sgn_item * L'.con * L'.sgn_item * L'.con * cunify_error
|
adamc@156
|
1761 | SgiMismatchedDatatypes of L'.sgn_item * L'.sgn_item * (L'.con * L'.con * cunify_error) option
|
adamc@41
|
1762 | SgnWrongForm of L'.sgn * L'.sgn
|
adamc@42
|
1763 | UnWhereable of L'.sgn * string
|
adamc@75
|
1764 | WhereWrongKind of L'.kind * L'.kind * kunify_error
|
adamc@58
|
1765 | NotIncludable of L'.sgn
|
adamc@62
|
1766 | DuplicateCon of ErrorMsg.span * string
|
adamc@62
|
1767 | DuplicateVal of ErrorMsg.span * string
|
adamc@62
|
1768 | DuplicateSgn of ErrorMsg.span * string
|
adamc@62
|
1769 | DuplicateStr of ErrorMsg.span * string
|
adamc@88
|
1770 | NotConstraintsable of L'.sgn
|
adamc@31
|
1771
|
adamc@31
|
1772 fun sgnError env err =
|
adamc@31
|
1773 case err of
|
adamc@31
|
1774 UnboundSgn (loc, s) =>
|
adamc@31
|
1775 ErrorMsg.errorAt loc ("Unbound signature variable " ^ s)
|
adamc@31
|
1776 | UnmatchedSgi (sgi as (_, loc)) =>
|
adamc@31
|
1777 (ErrorMsg.errorAt loc "Unmatched signature item";
|
adamc@31
|
1778 eprefaces' [("Item", p_sgn_item env sgi)])
|
adamc@31
|
1779 | SgiWrongKind (sgi1, k1, sgi2, k2, kerr) =>
|
adamc@31
|
1780 (ErrorMsg.errorAt (#2 sgi1) "Kind unification failure in signature matching:";
|
adamc@59
|
1781 eprefaces' [("Have", p_sgn_item env sgi1),
|
adamc@59
|
1782 ("Need", p_sgn_item env sgi2),
|
adamc@31
|
1783 ("Kind 1", p_kind k1),
|
adamc@31
|
1784 ("Kind 2", p_kind k2)];
|
adamc@31
|
1785 kunifyError kerr)
|
adamc@31
|
1786 | SgiWrongCon (sgi1, c1, sgi2, c2, cerr) =>
|
adamc@31
|
1787 (ErrorMsg.errorAt (#2 sgi1) "Constructor unification failure in signature matching:";
|
adamc@59
|
1788 eprefaces' [("Have", p_sgn_item env sgi1),
|
adamc@59
|
1789 ("Need", p_sgn_item env sgi2),
|
adamc@31
|
1790 ("Con 1", p_con env c1),
|
adamc@31
|
1791 ("Con 2", p_con env c2)];
|
adamc@31
|
1792 cunifyError env cerr)
|
adamc@156
|
1793 | SgiMismatchedDatatypes (sgi1, sgi2, cerro) =>
|
adamc@156
|
1794 (ErrorMsg.errorAt (#2 sgi1) "Mismatched 'datatype' specifications:";
|
adamc@156
|
1795 eprefaces' [("Have", p_sgn_item env sgi1),
|
adamc@156
|
1796 ("Need", p_sgn_item env sgi2)];
|
adamc@156
|
1797 Option.app (fn (c1, c2, ue) =>
|
adamc@156
|
1798 (eprefaces "Unification error"
|
adamc@156
|
1799 [("Con 1", p_con env c1),
|
adamc@156
|
1800 ("Con 2", p_con env c2)];
|
adamc@156
|
1801 cunifyError env ue)) cerro)
|
adamc@41
|
1802 | SgnWrongForm (sgn1, sgn2) =>
|
adamc@41
|
1803 (ErrorMsg.errorAt (#2 sgn1) "Incompatible signatures:";
|
adamc@41
|
1804 eprefaces' [("Sig 1", p_sgn env sgn1),
|
adamc@41
|
1805 ("Sig 2", p_sgn env sgn2)])
|
adamc@42
|
1806 | UnWhereable (sgn, x) =>
|
adamc@42
|
1807 (ErrorMsg.errorAt (#2 sgn) "Unavailable field for 'where'";
|
adamc@42
|
1808 eprefaces' [("Signature", p_sgn env sgn),
|
adamc@42
|
1809 ("Field", PD.string x)])
|
adamc@75
|
1810 | WhereWrongKind (k1, k2, kerr) =>
|
adamc@75
|
1811 (ErrorMsg.errorAt (#2 k1) "Wrong kind for 'where'";
|
adamc@75
|
1812 eprefaces' [("Have", p_kind k1),
|
adamc@75
|
1813 ("Need", p_kind k2)];
|
adamc@75
|
1814 kunifyError kerr)
|
adamc@58
|
1815 | NotIncludable sgn =>
|
adamc@58
|
1816 (ErrorMsg.errorAt (#2 sgn) "Invalid signature to 'include'";
|
adamc@58
|
1817 eprefaces' [("Signature", p_sgn env sgn)])
|
adamc@62
|
1818 | DuplicateCon (loc, s) =>
|
adamc@62
|
1819 ErrorMsg.errorAt loc ("Duplicate constructor " ^ s ^ " in signature")
|
adamc@62
|
1820 | DuplicateVal (loc, s) =>
|
adamc@62
|
1821 ErrorMsg.errorAt loc ("Duplicate value " ^ s ^ " in signature")
|
adamc@62
|
1822 | DuplicateSgn (loc, s) =>
|
adamc@62
|
1823 ErrorMsg.errorAt loc ("Duplicate signature " ^ s ^ " in signature")
|
adamc@62
|
1824 | DuplicateStr (loc, s) =>
|
adamc@62
|
1825 ErrorMsg.errorAt loc ("Duplicate structure " ^ s ^ " in signature")
|
adamc@88
|
1826 | NotConstraintsable sgn =>
|
adamc@88
|
1827 (ErrorMsg.errorAt (#2 sgn) "Invalid signature for 'open constraints'";
|
adamc@88
|
1828 eprefaces' [("Signature", p_sgn env sgn)])
|
adamc@31
|
1829
|
adamc@31
|
1830 datatype str_error =
|
adamc@31
|
1831 UnboundStr of ErrorMsg.span * string
|
adamc@44
|
1832 | NotFunctor of L'.sgn
|
adamc@46
|
1833 | FunctorRebind of ErrorMsg.span
|
adamc@61
|
1834 | UnOpenable of L'.sgn
|
adamc@75
|
1835 | NotType of L'.kind * (L'.kind * L'.kind * kunify_error)
|
adamc@156
|
1836 | DuplicateConstructor of string * ErrorMsg.span
|
adamc@158
|
1837 | NotDatatype of ErrorMsg.span
|
adamc@31
|
1838
|
adamc@31
|
1839 fun strError env err =
|
adamc@31
|
1840 case err of
|
adamc@31
|
1841 UnboundStr (loc, s) =>
|
adamc@31
|
1842 ErrorMsg.errorAt loc ("Unbound structure variable " ^ s)
|
adamc@44
|
1843 | NotFunctor sgn =>
|
adamc@44
|
1844 (ErrorMsg.errorAt (#2 sgn) "Application of non-functor";
|
adamc@44
|
1845 eprefaces' [("Signature", p_sgn env sgn)])
|
adamc@46
|
1846 | FunctorRebind loc =>
|
adamc@46
|
1847 ErrorMsg.errorAt loc "Attempt to rebind functor"
|
adamc@61
|
1848 | UnOpenable sgn =>
|
adamc@61
|
1849 (ErrorMsg.errorAt (#2 sgn) "Un-openable structure";
|
adamc@61
|
1850 eprefaces' [("Signature", p_sgn env sgn)])
|
adamc@75
|
1851 | NotType (k, (k1, k2, ue)) =>
|
adamc@75
|
1852 (ErrorMsg.errorAt (#2 k) "'val' type kind is not 'Type'";
|
adamc@75
|
1853 eprefaces' [("Kind", p_kind k),
|
adamc@75
|
1854 ("Subkind 1", p_kind k1),
|
adamc@75
|
1855 ("Subkind 2", p_kind k2)];
|
adamc@75
|
1856 kunifyError ue)
|
adamc@156
|
1857 | DuplicateConstructor (x, loc) =>
|
adamc@156
|
1858 ErrorMsg.errorAt loc ("Duplicate datatype constructor " ^ x)
|
adamc@158
|
1859 | NotDatatype loc =>
|
adamc@158
|
1860 ErrorMsg.errorAt loc "Trying to import non-datatype as a datatype"
|
adamc@31
|
1861
|
adamc@42
|
1862 val hnormSgn = E.hnormSgn
|
adamc@31
|
1863
|
adamc@210
|
1864 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
|
adamc@205
|
1865
|
adamc@88
|
1866 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
|
adamc@76
|
1867 case sgi of
|
adamc@76
|
1868 L.SgiConAbs (x, k) =>
|
adamc@76
|
1869 let
|
adamc@76
|
1870 val k' = elabKind k
|
adamc@31
|
1871
|
adamc@76
|
1872 val (env', n) = E.pushCNamed env x k' NONE
|
adamc@76
|
1873 in
|
adamc@88
|
1874 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
|
adamc@76
|
1875 end
|
adamc@31
|
1876
|
adamc@76
|
1877 | L.SgiCon (x, ko, c) =>
|
adamc@76
|
1878 let
|
adamc@76
|
1879 val k' = case ko of
|
adamc@76
|
1880 NONE => kunif loc
|
adamc@76
|
1881 | SOME k => elabKind k
|
adamc@31
|
1882
|
adamc@83
|
1883 val (c', ck, gs') = elabCon (env, denv) c
|
adamc@76
|
1884 val (env', n) = E.pushCNamed env x k' (SOME c')
|
adamc@76
|
1885 in
|
adamc@76
|
1886 checkKind env c' ck k';
|
adamc@31
|
1887
|
adamc@88
|
1888 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
|
adamc@76
|
1889 end
|
adamc@31
|
1890
|
adamc@191
|
1891 | L.SgiDatatype (x, xs, xcs) =>
|
adamc@157
|
1892 let
|
adamc@157
|
1893 val k = (L'.KType, loc)
|
adamc@191
|
1894 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@191
|
1895 val (env, n) = E.pushCNamed env x k' NONE
|
adamc@157
|
1896 val t = (L'.CNamed n, loc)
|
adamc@194
|
1897 val nxs = length xs - 1
|
adamc@194
|
1898 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
|
adamc@157
|
1899
|
adamc@157
|
1900 val (xcs, (used, env, gs)) =
|
adamc@157
|
1901 ListUtil.foldlMap
|
adamc@157
|
1902 (fn ((x, to), (used, env, gs)) =>
|
adamc@157
|
1903 let
|
adamc@157
|
1904 val (to, t, gs') = case to of
|
adamc@157
|
1905 NONE => (NONE, t, gs)
|
adamc@157
|
1906 | SOME t' =>
|
adamc@157
|
1907 let
|
adamc@157
|
1908 val (t', tk, gs') = elabCon (env, denv) t'
|
adamc@157
|
1909 in
|
adamc@157
|
1910 checkKind env t' tk k;
|
adamc@157
|
1911 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
|
adamc@157
|
1912 end
|
adamc@191
|
1913 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
|
adamc@157
|
1914
|
adamc@157
|
1915 val (env, n') = E.pushENamed env x t
|
adamc@157
|
1916 in
|
adamc@157
|
1917 if SS.member (used, x) then
|
adamc@157
|
1918 strError env (DuplicateConstructor (x, loc))
|
adamc@157
|
1919 else
|
adamc@157
|
1920 ();
|
adamc@157
|
1921 ((x, n', to), (SS.add (used, x), env, gs'))
|
adamc@157
|
1922 end)
|
adamc@157
|
1923 (SS.empty, env, []) xcs
|
adamc@191
|
1924
|
adamc@191
|
1925 val env = E.pushDatatype env n xs xcs
|
adamc@157
|
1926 in
|
adamc@191
|
1927 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
|
adamc@157
|
1928 end
|
adamc@156
|
1929
|
adamc@158
|
1930 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
|
adamc@158
|
1931
|
adamc@158
|
1932 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
|
adamc@158
|
1933 (case E.lookupStr env m1 of
|
adamc@158
|
1934 NONE => (strError env (UnboundStr (loc, m1));
|
adamc@158
|
1935 ([], (env, denv, gs)))
|
adamc@158
|
1936 | SOME (n, sgn) =>
|
adamc@158
|
1937 let
|
adamc@158
|
1938 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@158
|
1939 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@158
|
1940 NONE => (conError env (UnboundStrInCon (loc, m));
|
adamc@158
|
1941 (strerror, sgnerror))
|
adamc@158
|
1942 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@158
|
1943 ((L'.StrVar n, loc), sgn) ms
|
adamc@158
|
1944 in
|
adamc@161
|
1945 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
|
adamc@161
|
1946 ((L'.CModProj (n, ms, s), _), gs) =>
|
adamc@161
|
1947 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
|
adamc@161
|
1948 NONE => (conError env (UnboundDatatype (loc, s));
|
adamc@161
|
1949 ([], (env, denv, gs)))
|
adamc@191
|
1950 | SOME (xs, xncs) =>
|
adamc@161
|
1951 let
|
adamc@161
|
1952 val k = (L'.KType, loc)
|
adamc@191
|
1953 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@191
|
1954
|
adamc@161
|
1955 val t = (L'.CModProj (n, ms, s), loc)
|
adamc@191
|
1956 val (env, n') = E.pushCNamed env x k' (SOME t)
|
adamc@191
|
1957 val env = E.pushDatatype env n' xs xncs
|
adamc@158
|
1958
|
adamc@161
|
1959 val t = (L'.CNamed n', loc)
|
adamc@161
|
1960 val env = foldl (fn ((x, n, to), env) =>
|
adamc@161
|
1961 let
|
adamc@161
|
1962 val t = case to of
|
adamc@161
|
1963 NONE => t
|
adamc@161
|
1964 | SOME t' => (L'.TFun (t', t), loc)
|
adamc@191
|
1965
|
adamc@191
|
1966 val t = foldr (fn (x, t) =>
|
adamc@191
|
1967 (L'.TCFun (L'.Implicit, x, k, t), loc))
|
adamc@191
|
1968 t xs
|
adamc@161
|
1969 in
|
adamc@161
|
1970 E.pushENamedAs env x n t
|
adamc@161
|
1971 end) env xncs
|
adamc@161
|
1972 in
|
adamc@191
|
1973 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
|
adamc@161
|
1974 end)
|
adamc@161
|
1975 | _ => (strError env (NotDatatype loc);
|
adamc@161
|
1976 ([], (env, denv, [])))
|
adamc@158
|
1977 end)
|
adamc@156
|
1978
|
adamc@76
|
1979 | L.SgiVal (x, c) =>
|
adamc@76
|
1980 let
|
adamc@83
|
1981 val (c', ck, gs') = elabCon (env, denv) c
|
adamc@31
|
1982
|
adamc@76
|
1983 val (env', n) = E.pushENamed env x c'
|
adamc@218
|
1984 val (c', gs'') = normClassConstraint (env, denv) c'
|
adamc@76
|
1985 in
|
adamc@76
|
1986 (unifyKinds ck ktype
|
adamc@76
|
1987 handle KUnify ue => strError env (NotType (ck, ue)));
|
adamc@31
|
1988
|
adamc@218
|
1989 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs'' @ gs))
|
adamc@76
|
1990 end
|
adamc@31
|
1991
|
adamc@76
|
1992 | L.SgiStr (x, sgn) =>
|
adamc@76
|
1993 let
|
adamc@83
|
1994 val (sgn', gs') = elabSgn (env, denv) sgn
|
adamc@76
|
1995 val (env', n) = E.pushStrNamed env x sgn'
|
adamc@76
|
1996 in
|
adamc@88
|
1997 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
|
adamc@76
|
1998 end
|
adamc@31
|
1999
|
adamc@76
|
2000 | L.SgiSgn (x, sgn) =>
|
adamc@76
|
2001 let
|
adamc@83
|
2002 val (sgn', gs') = elabSgn (env, denv) sgn
|
adamc@76
|
2003 val (env', n) = E.pushSgnNamed env x sgn'
|
adamc@76
|
2004 in
|
adamc@88
|
2005 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
|
adamc@76
|
2006 end
|
adamc@31
|
2007
|
adamc@76
|
2008 | L.SgiInclude sgn =>
|
adamc@76
|
2009 let
|
adamc@83
|
2010 val (sgn', gs') = elabSgn (env, denv) sgn
|
adamc@76
|
2011 in
|
adamc@76
|
2012 case #1 (hnormSgn env sgn') of
|
adamc@76
|
2013 L'.SgnConst sgis =>
|
adamc@88
|
2014 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
|
adamc@76
|
2015 | _ => (sgnError env (NotIncludable sgn');
|
adamc@88
|
2016 ([], (env, denv, [])))
|
adamc@88
|
2017 end
|
adamc@88
|
2018
|
adamc@88
|
2019 | L.SgiConstraint (c1, c2) =>
|
adamc@88
|
2020 let
|
adamc@88
|
2021 val (c1', k1, gs1) = elabCon (env, denv) c1
|
adamc@88
|
2022 val (c2', k2, gs2) = elabCon (env, denv) c2
|
adamc@88
|
2023
|
adamc@90
|
2024 val (denv, gs3) = D.assert env denv (c1', c2')
|
adamc@88
|
2025 in
|
adamc@88
|
2026 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
|
adamc@88
|
2027 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
|
adamc@88
|
2028
|
adamc@90
|
2029 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
|
adamc@76
|
2030 end
|
adamc@31
|
2031
|
adamc@203
|
2032 | L.SgiTable (x, c) =>
|
adamc@203
|
2033 let
|
adamc@203
|
2034 val (c', k, gs) = elabCon (env, denv) c
|
adamc@210
|
2035 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
|
adamc@203
|
2036 in
|
adamc@203
|
2037 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
|
adamc@210
|
2038 ([(L'.SgiTable (!basis_r, x, n, c'), loc)], (env, denv, gs))
|
adamc@203
|
2039 end
|
adamc@203
|
2040
|
adamc@211
|
2041 | L.SgiClassAbs x =>
|
adamc@211
|
2042 let
|
adamc@211
|
2043 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2044 val (env, n) = E.pushCNamed env x k NONE
|
adamc@211
|
2045 val env = E.pushClass env n
|
adamc@211
|
2046 in
|
adamc@211
|
2047 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
|
adamc@211
|
2048 end
|
adamc@211
|
2049
|
adamc@211
|
2050 | L.SgiClass (x, c) =>
|
adamc@211
|
2051 let
|
adamc@211
|
2052 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2053 val (c', ck, gs) = elabCon (env, denv) c
|
adamc@211
|
2054 val (env, n) = E.pushCNamed env x k (SOME c')
|
adamc@211
|
2055 val env = E.pushClass env n
|
adamc@211
|
2056 in
|
adamc@211
|
2057 checkKind env c' ck k;
|
adamc@211
|
2058 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
|
adamc@211
|
2059 end
|
adamc@211
|
2060
|
adamc@83
|
2061 and elabSgn (env, denv) (sgn, loc) =
|
adamc@31
|
2062 case sgn of
|
adamc@31
|
2063 L.SgnConst sgis =>
|
adamc@31
|
2064 let
|
adamc@88
|
2065 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
|
adamc@62
|
2066
|
adamc@62
|
2067 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
|
adamc@62
|
2068 case sgi of
|
adamc@62
|
2069 L'.SgiConAbs (x, _, _) =>
|
adamc@62
|
2070 (if SS.member (cons, x) then
|
adamc@62
|
2071 sgnError env (DuplicateCon (loc, x))
|
adamc@62
|
2072 else
|
adamc@62
|
2073 ();
|
adamc@62
|
2074 (SS.add (cons, x), vals, sgns, strs))
|
adamc@62
|
2075 | L'.SgiCon (x, _, _, _) =>
|
adamc@62
|
2076 (if SS.member (cons, x) then
|
adamc@62
|
2077 sgnError env (DuplicateCon (loc, x))
|
adamc@62
|
2078 else
|
adamc@62
|
2079 ();
|
adamc@62
|
2080 (SS.add (cons, x), vals, sgns, strs))
|
adamc@191
|
2081 | L'.SgiDatatype (x, _, _, xncs) =>
|
adamc@156
|
2082 let
|
adamc@156
|
2083 val vals = foldl (fn ((x, _, _), vals) =>
|
adamc@156
|
2084 (if SS.member (vals, x) then
|
adamc@156
|
2085 sgnError env (DuplicateVal (loc, x))
|
adamc@156
|
2086 else
|
adamc@156
|
2087 ();
|
adamc@156
|
2088 SS.add (vals, x)))
|
adamc@156
|
2089 vals xncs
|
adamc@156
|
2090 in
|
adamc@156
|
2091 if SS.member (cons, x) then
|
adamc@156
|
2092 sgnError env (DuplicateCon (loc, x))
|
adamc@156
|
2093 else
|
adamc@156
|
2094 ();
|
adamc@156
|
2095 (SS.add (cons, x), vals, sgns, strs)
|
adamc@156
|
2096 end
|
adamc@191
|
2097 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
|
adamc@156
|
2098 (if SS.member (cons, x) then
|
adamc@156
|
2099 sgnError env (DuplicateCon (loc, x))
|
adamc@156
|
2100 else
|
adamc@156
|
2101 ();
|
adamc@156
|
2102 (SS.add (cons, x), vals, sgns, strs))
|
adamc@62
|
2103 | L'.SgiVal (x, _, _) =>
|
adamc@62
|
2104 (if SS.member (vals, x) then
|
adamc@62
|
2105 sgnError env (DuplicateVal (loc, x))
|
adamc@62
|
2106 else
|
adamc@62
|
2107 ();
|
adamc@62
|
2108 (cons, SS.add (vals, x), sgns, strs))
|
adamc@62
|
2109 | L'.SgiSgn (x, _, _) =>
|
adamc@62
|
2110 (if SS.member (sgns, x) then
|
adamc@62
|
2111 sgnError env (DuplicateSgn (loc, x))
|
adamc@62
|
2112 else
|
adamc@62
|
2113 ();
|
adamc@62
|
2114 (cons, vals, SS.add (sgns, x), strs))
|
adamc@62
|
2115 | L'.SgiStr (x, _, _) =>
|
adamc@62
|
2116 (if SS.member (strs, x) then
|
adamc@62
|
2117 sgnError env (DuplicateStr (loc, x))
|
adamc@62
|
2118 else
|
adamc@62
|
2119 ();
|
adamc@88
|
2120 (cons, vals, sgns, SS.add (strs, x)))
|
adamc@203
|
2121 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
|
adamc@205
|
2122 | L'.SgiTable (_, x, _, _) =>
|
adamc@203
|
2123 (if SS.member (vals, x) then
|
adamc@203
|
2124 sgnError env (DuplicateVal (loc, x))
|
adamc@203
|
2125 else
|
adamc@203
|
2126 ();
|
adamc@211
|
2127 (cons, SS.add (vals, x), sgns, strs))
|
adamc@211
|
2128 | L'.SgiClassAbs (x, _) =>
|
adamc@211
|
2129 (if SS.member (cons, x) then
|
adamc@211
|
2130 sgnError env (DuplicateCon (loc, x))
|
adamc@211
|
2131 else
|
adamc@211
|
2132 ();
|
adamc@211
|
2133 (SS.add (cons, x), vals, sgns, strs))
|
adamc@211
|
2134 | L'.SgiClass (x, _, _) =>
|
adamc@211
|
2135 (if SS.member (cons, x) then
|
adamc@211
|
2136 sgnError env (DuplicateCon (loc, x))
|
adamc@211
|
2137 else
|
adamc@211
|
2138 ();
|
adamc@211
|
2139 (SS.add (cons, x), vals, sgns, strs)))
|
adamc@62
|
2140 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
|
adamc@31
|
2141 in
|
adamc@83
|
2142 ((L'.SgnConst sgis', loc), gs)
|
adamc@31
|
2143 end
|
adamc@31
|
2144 | L.SgnVar x =>
|
adamc@31
|
2145 (case E.lookupSgn env x of
|
adamc@31
|
2146 NONE =>
|
adamc@31
|
2147 (sgnError env (UnboundSgn (loc, x));
|
adamc@83
|
2148 ((L'.SgnError, loc), []))
|
adamc@83
|
2149 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
|
adamc@41
|
2150 | L.SgnFun (m, dom, ran) =>
|
adamc@41
|
2151 let
|
adamc@83
|
2152 val (dom', gs1) = elabSgn (env, denv) dom
|
adamc@41
|
2153 val (env', n) = E.pushStrNamed env m dom'
|
adamc@83
|
2154 val (ran', gs2) = elabSgn (env', denv) ran
|
adamc@41
|
2155 in
|
adamc@83
|
2156 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
|
adamc@41
|
2157 end
|
adamc@42
|
2158 | L.SgnWhere (sgn, x, c) =>
|
adamc@42
|
2159 let
|
adamc@83
|
2160 val (sgn', ds1) = elabSgn (env, denv) sgn
|
adamc@83
|
2161 val (c', ck, ds2) = elabCon (env, denv) c
|
adamc@42
|
2162 in
|
adamc@42
|
2163 case #1 (hnormSgn env sgn') of
|
adamc@83
|
2164 L'.SgnError => (sgnerror, [])
|
adamc@42
|
2165 | L'.SgnConst sgis =>
|
adamc@75
|
2166 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
|
adamc@75
|
2167 x' = x andalso
|
adamc@75
|
2168 (unifyKinds k ck
|
adamc@75
|
2169 handle KUnify x => sgnError env (WhereWrongKind x);
|
adamc@42
|
2170 true)
|
adamc@42
|
2171 | _ => false) sgis then
|
adamc@83
|
2172 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
|
adamc@42
|
2173 else
|
adamc@42
|
2174 (sgnError env (UnWhereable (sgn', x));
|
adamc@83
|
2175 (sgnerror, []))
|
adamc@42
|
2176 | _ => (sgnError env (UnWhereable (sgn', x));
|
adamc@83
|
2177 (sgnerror, []))
|
adamc@42
|
2178 end
|
adamc@59
|
2179 | L.SgnProj (m, ms, x) =>
|
adamc@59
|
2180 (case E.lookupStr env m of
|
adamc@59
|
2181 NONE => (strError env (UnboundStr (loc, m));
|
adamc@83
|
2182 (sgnerror, []))
|
adamc@59
|
2183 | SOME (n, sgn) =>
|
adamc@59
|
2184 let
|
adamc@59
|
2185 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@59
|
2186 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@59
|
2187 NONE => (strError env (UnboundStr (loc, m));
|
adamc@59
|
2188 (strerror, sgnerror))
|
adamc@59
|
2189 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@59
|
2190 ((L'.StrVar n, loc), sgn) ms
|
adamc@59
|
2191 in
|
adamc@59
|
2192 case E.projectSgn env {sgn = sgn, str = str, field = x} of
|
adamc@59
|
2193 NONE => (sgnError env (UnboundSgn (loc, x));
|
adamc@83
|
2194 (sgnerror, []))
|
adamc@83
|
2195 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
|
adamc@59
|
2196 end)
|
adamc@59
|
2197
|
adamc@31
|
2198
|
adamc@66
|
2199 fun selfify env {str, strs, sgn} =
|
adamc@66
|
2200 case #1 (hnormSgn env sgn) of
|
adamc@66
|
2201 L'.SgnError => sgn
|
adamc@66
|
2202 | L'.SgnVar _ => sgn
|
adamc@66
|
2203
|
adamc@66
|
2204 | L'.SgnConst sgis =>
|
adamc@66
|
2205 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
|
adamc@66
|
2206 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
|
adamc@191
|
2207 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
|
adamc@191
|
2208 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
|
adamc@218
|
2209 | (L'.SgiClassAbs (x, n), loc) =>
|
adamc@218
|
2210 (L'.SgiClass (x, n, (L'.CModProj (str, strs, x), loc)), loc)
|
adamc@66
|
2211 | (L'.SgiStr (x, n, sgn), loc) =>
|
adamc@66
|
2212 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
|
adamc@66
|
2213 | x => x) sgis), #2 sgn)
|
adamc@66
|
2214 | L'.SgnFun _ => sgn
|
adamc@66
|
2215 | L'.SgnWhere _ => sgn
|
adamc@66
|
2216 | L'.SgnProj (m, ms, x) =>
|
adamc@66
|
2217 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
|
adamc@66
|
2218 (L'.StrVar m, #2 sgn) ms,
|
adamc@66
|
2219 sgn = #2 (E.lookupStrNamed env m),
|
adamc@66
|
2220 field = x} of
|
adamc@66
|
2221 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
|
adamc@66
|
2222 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
|
adamc@66
|
2223
|
adamc@66
|
2224 fun selfifyAt env {str, sgn} =
|
adamc@66
|
2225 let
|
adamc@66
|
2226 fun self (str, _) =
|
adamc@66
|
2227 case str of
|
adamc@66
|
2228 L'.StrVar x => SOME (x, [])
|
adamc@66
|
2229 | L'.StrProj (str, x) =>
|
adamc@66
|
2230 (case self str of
|
adamc@66
|
2231 NONE => NONE
|
adamc@66
|
2232 | SOME (m, ms) => SOME (m, ms @ [x]))
|
adamc@66
|
2233 | _ => NONE
|
adamc@66
|
2234 in
|
adamc@66
|
2235 case self str of
|
adamc@66
|
2236 NONE => sgn
|
adamc@66
|
2237 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
|
adamc@66
|
2238 end
|
adamc@66
|
2239
|
adamc@88
|
2240 fun dopen (env, denv) {str, strs, sgn} =
|
adamc@66
|
2241 let
|
adamc@66
|
2242 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
|
adamc@66
|
2243 (L'.StrVar str, #2 sgn) strs
|
adamc@66
|
2244 in
|
adamc@66
|
2245 case #1 (hnormSgn env sgn) of
|
adamc@66
|
2246 L'.SgnConst sgis =>
|
adamc@88
|
2247 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
|
adamc@162
|
2248 let
|
adamc@162
|
2249 val d =
|
adamc@162
|
2250 case sgi of
|
adamc@162
|
2251 L'.SgiConAbs (x, n, k) =>
|
adamc@162
|
2252 let
|
adamc@162
|
2253 val c = (L'.CModProj (str, strs, x), loc)
|
adamc@162
|
2254 in
|
adamc@162
|
2255 (L'.DCon (x, n, k, c), loc)
|
adamc@162
|
2256 end
|
adamc@162
|
2257 | L'.SgiCon (x, n, k, c) =>
|
adamc@162
|
2258 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
|
adamc@191
|
2259 | L'.SgiDatatype (x, n, xs, xncs) =>
|
adamc@191
|
2260 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
|
adamc@191
|
2261 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
|
adamc@191
|
2262 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
|
adamc@162
|
2263 | L'.SgiVal (x, n, t) =>
|
adamc@162
|
2264 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
|
adamc@162
|
2265 | L'.SgiStr (x, n, sgn) =>
|
adamc@162
|
2266 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
|
adamc@162
|
2267 | L'.SgiSgn (x, n, sgn) =>
|
adamc@162
|
2268 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
|
adamc@162
|
2269 | L'.SgiConstraint (c1, c2) =>
|
adamc@162
|
2270 (L'.DConstraint (c1, c2), loc)
|
adamc@205
|
2271 | L'.SgiTable (_, x, n, c) =>
|
adamc@210
|
2272 (L'.DVal (x, n, (L'.CApp (tableOf (), c), loc),
|
adamc@203
|
2273 (L'.EModProj (str, strs, x), loc)), loc)
|
adamc@211
|
2274 | L'.SgiClassAbs (x, n) =>
|
adamc@211
|
2275 let
|
adamc@211
|
2276 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2277 val c = (L'.CModProj (str, strs, x), loc)
|
adamc@211
|
2278 in
|
adamc@211
|
2279 (L'.DCon (x, n, k, c), loc)
|
adamc@211
|
2280 end
|
adamc@211
|
2281 | L'.SgiClass (x, n, _) =>
|
adamc@211
|
2282 let
|
adamc@211
|
2283 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2284 val c = (L'.CModProj (str, strs, x), loc)
|
adamc@211
|
2285 in
|
adamc@211
|
2286 (L'.DCon (x, n, k, c), loc)
|
adamc@211
|
2287 end
|
adamc@162
|
2288 in
|
adamc@162
|
2289 (d, (E.declBinds env' d, denv'))
|
adamc@162
|
2290 end)
|
adamc@88
|
2291 (env, denv) sgis
|
adamc@66
|
2292 | _ => (strError env (UnOpenable sgn);
|
adamc@88
|
2293 ([], (env, denv)))
|
adamc@66
|
2294 end
|
adamc@66
|
2295
|
adamc@88
|
2296 fun dopenConstraints (loc, env, denv) {str, strs} =
|
adamc@88
|
2297 case E.lookupStr env str of
|
adamc@88
|
2298 NONE => (strError env (UnboundStr (loc, str));
|
adamc@88
|
2299 denv)
|
adamc@88
|
2300 | SOME (n, sgn) =>
|
adamc@88
|
2301 let
|
adamc@88
|
2302 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@88
|
2303 case E.projectStr env {str = str, sgn = sgn, field = m} of
|
adamc@88
|
2304 NONE => (strError env (UnboundStr (loc, m));
|
adamc@88
|
2305 (strerror, sgnerror))
|
adamc@88
|
2306 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@88
|
2307 ((L'.StrVar n, loc), sgn) strs
|
adamc@88
|
2308
|
adamc@88
|
2309 val cso = E.projectConstraints env {sgn = sgn, str = st}
|
adamc@88
|
2310
|
adamc@88
|
2311 val denv = case cso of
|
adamc@88
|
2312 NONE => (strError env (UnboundStr (loc, str));
|
adamc@88
|
2313 denv)
|
adamc@90
|
2314 | SOME cs => foldl (fn ((c1, c2), denv) =>
|
adamc@90
|
2315 let
|
adamc@90
|
2316 val (denv, gs) = D.assert env denv (c1, c2)
|
adamc@90
|
2317 in
|
adamc@90
|
2318 case gs of
|
adamc@90
|
2319 [] => ()
|
adamc@90
|
2320 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
|
adamc@90
|
2321
|
adamc@90
|
2322 denv
|
adamc@90
|
2323 end) denv cs
|
adamc@88
|
2324 in
|
adamc@88
|
2325 denv
|
adamc@88
|
2326 end
|
adamc@88
|
2327
|
adamc@31
|
2328 fun sgiOfDecl (d, loc) =
|
adamc@31
|
2329 case d of
|
adamc@123
|
2330 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
|
adamc@156
|
2331 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
|
adamc@156
|
2332 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
|
adamc@123
|
2333 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
|
adamc@123
|
2334 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
|
adamc@123
|
2335 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
|
adamc@123
|
2336 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
|
adamc@123
|
2337 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
|
adamc@123
|
2338 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
|
adamc@123
|
2339 | L'.DExport _ => []
|
adamc@205
|
2340 | L'.DTable (tn, x, n, c) => [(L'.SgiTable (tn, x, n, c), loc)]
|
adamc@213
|
2341 | L'.DClass (x, n, c) => [(L'.SgiClass (x, n, c), loc)]
|
adamc@88
|
2342
|
adamc@88
|
2343 fun sgiBindsD (env, denv) (sgi, _) =
|
adamc@88
|
2344 case sgi of
|
adamc@90
|
2345 L'.SgiConstraint (c1, c2) =>
|
adamc@90
|
2346 (case D.assert env denv (c1, c2) of
|
adamc@90
|
2347 (denv, []) => denv
|
adamc@90
|
2348 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
|
adamc@88
|
2349 | _ => denv
|
adamc@31
|
2350
|
adamc@86
|
2351 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
|
adamc@35
|
2352 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
|
adamc@31
|
2353 (L'.SgnError, _) => ()
|
adamc@31
|
2354 | (_, L'.SgnError) => ()
|
adamc@31
|
2355
|
adamc@31
|
2356 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
|
adamc@31
|
2357 let
|
adamc@156
|
2358 fun folder (sgi2All as (sgi, loc), (env, denv)) =
|
adamc@31
|
2359 let
|
adamc@31
|
2360 fun seek p =
|
adamc@31
|
2361 let
|
adamc@88
|
2362 fun seek (env, denv) ls =
|
adamc@31
|
2363 case ls of
|
adamc@31
|
2364 [] => (sgnError env (UnmatchedSgi sgi2All);
|
adamc@88
|
2365 (env, denv))
|
adamc@31
|
2366 | h :: t =>
|
adamc@31
|
2367 case p h of
|
adamc@88
|
2368 NONE => seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
|
adamc@88
|
2369 | SOME envs => envs
|
adamc@31
|
2370 in
|
adamc@88
|
2371 seek (env, denv) sgis1
|
adamc@31
|
2372 end
|
adamc@31
|
2373 in
|
adamc@31
|
2374 case sgi of
|
adamc@31
|
2375 L'.SgiConAbs (x, n2, k2) =>
|
adamc@31
|
2376 seek (fn sgi1All as (sgi1, _) =>
|
adamc@31
|
2377 let
|
adamc@41
|
2378 fun found (x', n1, k1, co1) =
|
adamc@41
|
2379 if x = x' then
|
adamc@41
|
2380 let
|
adamc@41
|
2381 val () = unifyKinds k1 k2
|
adamc@41
|
2382 handle KUnify (k1, k2, err) =>
|
adamc@41
|
2383 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
|
adamc@41
|
2384 val env = E.pushCNamedAs env x n1 k1 co1
|
adamc@41
|
2385 in
|
adamc@41
|
2386 SOME (if n1 = n2 then
|
adamc@41
|
2387 env
|
adamc@41
|
2388 else
|
adamc@88
|
2389 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
|
adamc@88
|
2390 denv)
|
adamc@41
|
2391 end
|
adamc@41
|
2392 else
|
adamc@41
|
2393 NONE
|
adamc@31
|
2394 in
|
adamc@31
|
2395 case sgi1 of
|
adamc@41
|
2396 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
|
adamc@41
|
2397 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
|
adamc@191
|
2398 | L'.SgiDatatype (x', n1, xs, _) =>
|
adamc@191
|
2399 let
|
adamc@191
|
2400 val k = (L'.KType, loc)
|
adamc@191
|
2401 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@191
|
2402 in
|
adamc@191
|
2403 found (x', n1, k', NONE)
|
adamc@191
|
2404 end
|
adamc@191
|
2405 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
|
adamc@191
|
2406 let
|
adamc@191
|
2407 val k = (L'.KType, loc)
|
adamc@191
|
2408 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@191
|
2409 in
|
adamc@191
|
2410 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
|
adamc@191
|
2411 end
|
adamc@211
|
2412 | L'.SgiClassAbs (x', n1) => found (x', n1,
|
adamc@218
|
2413 (L'.KArrow ((L'.KType, loc),
|
adamc@218
|
2414 (L'.KType, loc)), loc),
|
adamc@218
|
2415 NONE)
|
adamc@211
|
2416 | L'.SgiClass (x', n1, c) => found (x', n1,
|
adamc@211
|
2417 (L'.KArrow ((L'.KType, loc),
|
adamc@211
|
2418 (L'.KType, loc)), loc),
|
adamc@211
|
2419 SOME c)
|
adamc@31
|
2420 | _ => NONE
|
adamc@31
|
2421 end)
|
adamc@31
|
2422
|
adamc@31
|
2423 | L'.SgiCon (x, n2, k2, c2) =>
|
adamc@31
|
2424 seek (fn sgi1All as (sgi1, _) =>
|
adamc@211
|
2425 let
|
adamc@211
|
2426 fun found (x', n1, k1, c1) =
|
adamc@211
|
2427 if x = x' then
|
adamc@211
|
2428 let
|
adamc@211
|
2429 fun good () = SOME (E.pushCNamedAs env x n2 k2 (SOME c2), denv)
|
adamc@211
|
2430 in
|
adamc@211
|
2431 (case unifyCons (env, denv) c1 c2 of
|
adamc@211
|
2432 [] => good ()
|
adamc@211
|
2433 | _ => NONE)
|
adamc@211
|
2434 handle CUnify (c1, c2, err) =>
|
adamc@211
|
2435 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@211
|
2436 good ())
|
adamc@211
|
2437 end
|
adamc@211
|
2438 else
|
adamc@211
|
2439 NONE
|
adamc@211
|
2440 in
|
adamc@211
|
2441 case sgi1 of
|
adamc@211
|
2442 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
|
adamc@211
|
2443 | L'.SgiClass (x', n1, c1) =>
|
adamc@211
|
2444 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
|
adamc@211
|
2445 | _ => NONE
|
adamc@211
|
2446 end)
|
adamc@31
|
2447
|
adamc@191
|
2448 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
|
adamc@156
|
2449 seek (fn sgi1All as (sgi1, _) =>
|
adamc@160
|
2450 let
|
adamc@191
|
2451 fun found (n1, xs1, xncs1) =
|
adamc@160
|
2452 let
|
adamc@160
|
2453 fun mismatched ue =
|
adamc@160
|
2454 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
|
adamc@160
|
2455 SOME (env, denv))
|
adamc@156
|
2456
|
adamc@191
|
2457 val k = (L'.KType, loc)
|
adamc@191
|
2458 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
|
adamc@191
|
2459
|
adamc@160
|
2460 fun good () =
|
adamc@160
|
2461 let
|
adamc@160
|
2462 val env = E.sgiBinds env sgi2All
|
adamc@160
|
2463 val env = if n1 = n2 then
|
adamc@160
|
2464 env
|
adamc@160
|
2465 else
|
adamc@160
|
2466 E.pushCNamedAs env x n1 (L'.KType, loc)
|
adamc@160
|
2467 (SOME (L'.CNamed n1, loc))
|
adamc@160
|
2468 in
|
adamc@160
|
2469 SOME (env, denv)
|
adamc@160
|
2470 end
|
adamc@156
|
2471
|
adamc@191
|
2472 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
|
adamc@160
|
2473 fun xncBad ((x1, _, t1), (x2, _, t2)) =
|
adamc@160
|
2474 String.compare (x1, x2) <> EQUAL
|
adamc@160
|
2475 orelse case (t1, t2) of
|
adamc@160
|
2476 (NONE, NONE) => false
|
adamc@160
|
2477 | (SOME t1, SOME t2) =>
|
adamc@160
|
2478 not (List.null (unifyCons (env, denv) t1 t2))
|
adamc@160
|
2479 | _ => true
|
adamc@160
|
2480 in
|
adamc@191
|
2481 (if xs1 <> xs2
|
adamc@191
|
2482 orelse length xncs1 <> length xncs2
|
adamc@160
|
2483 orelse ListPair.exists xncBad (xncs1, xncs2) then
|
adamc@160
|
2484 mismatched NONE
|
adamc@160
|
2485 else
|
adamc@160
|
2486 good ())
|
adamc@160
|
2487 handle CUnify ue => mismatched (SOME ue)
|
adamc@160
|
2488 end
|
adamc@160
|
2489 in
|
adamc@160
|
2490 case sgi1 of
|
adamc@191
|
2491 L'.SgiDatatype (x', n1, xs, xncs1) =>
|
adamc@160
|
2492 if x' = x then
|
adamc@191
|
2493 found (n1, xs, xncs1)
|
adamc@160
|
2494 else
|
adamc@160
|
2495 NONE
|
adamc@191
|
2496 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
|
adamc@162
|
2497 if x' = x then
|
adamc@191
|
2498 found (n1, xs, xncs1)
|
adamc@162
|
2499 else
|
adamc@162
|
2500 NONE
|
adamc@160
|
2501 | _ => NONE
|
adamc@160
|
2502 end)
|
adamc@156
|
2503
|
adamc@191
|
2504 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
|
adamc@158
|
2505 seek (fn sgi1All as (sgi1, _) =>
|
adamc@158
|
2506 case sgi1 of
|
adamc@191
|
2507 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
|
adamc@158
|
2508 if x = x' then
|
adamc@158
|
2509 let
|
adamc@158
|
2510 val k = (L'.KType, loc)
|
adamc@191
|
2511 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@158
|
2512 val t1 = (L'.CModProj (m11, ms1, s1), loc)
|
adamc@158
|
2513 val t2 = (L'.CModProj (m12, ms2, s2), loc)
|
adamc@158
|
2514
|
adamc@158
|
2515 fun good () =
|
adamc@158
|
2516 let
|
adamc@191
|
2517 val env = E.pushCNamedAs env x n1 k' (SOME t1)
|
adamc@191
|
2518 val env = E.pushCNamedAs env x n2 k' (SOME t2)
|
adamc@158
|
2519 in
|
adamc@158
|
2520 SOME (env, denv)
|
adamc@158
|
2521 end
|
adamc@158
|
2522 in
|
adamc@158
|
2523 (case unifyCons (env, denv) t1 t2 of
|
adamc@158
|
2524 [] => good ()
|
adamc@158
|
2525 | _ => NONE)
|
adamc@158
|
2526 handle CUnify (c1, c2, err) =>
|
adamc@158
|
2527 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@158
|
2528 good ())
|
adamc@158
|
2529 end
|
adamc@158
|
2530 else
|
adamc@158
|
2531 NONE
|
adamc@158
|
2532
|
adamc@158
|
2533 | _ => NONE)
|
adamc@156
|
2534
|
adamc@32
|
2535 | L'.SgiVal (x, n2, c2) =>
|
adamc@32
|
2536 seek (fn sgi1All as (sgi1, _) =>
|
adamc@32
|
2537 case sgi1 of
|
adamc@41
|
2538 L'.SgiVal (x', n1, c1) =>
|
adamc@41
|
2539 if x = x' then
|
adamc@86
|
2540 (case unifyCons (env, denv) c1 c2 of
|
adamc@88
|
2541 [] => SOME (env, denv)
|
adamc@86
|
2542 | _ => NONE)
|
adamc@86
|
2543 handle CUnify (c1, c2, err) =>
|
adamc@86
|
2544 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@88
|
2545 SOME (env, denv))
|
adamc@41
|
2546 else
|
adamc@41
|
2547 NONE
|
adamc@205
|
2548 | L'.SgiTable (_, x', n1, c1) =>
|
adamc@203
|
2549 if x = x' then
|
adamc@210
|
2550 (case unifyCons (env, denv) (L'.CApp (tableOf (), c1), loc) c2 of
|
adamc@203
|
2551 [] => SOME (env, denv)
|
adamc@203
|
2552 | _ => NONE)
|
adamc@203
|
2553 handle CUnify (c1, c2, err) =>
|
adamc@203
|
2554 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@203
|
2555 SOME (env, denv))
|
adamc@203
|
2556 else
|
adamc@203
|
2557 NONE
|
adamc@32
|
2558 | _ => NONE)
|
adamc@32
|
2559
|
adamc@33
|
2560 | L'.SgiStr (x, n2, sgn2) =>
|
adamc@33
|
2561 seek (fn sgi1All as (sgi1, _) =>
|
adamc@33
|
2562 case sgi1 of
|
adamc@41
|
2563 L'.SgiStr (x', n1, sgn1) =>
|
adamc@41
|
2564 if x = x' then
|
adamc@66
|
2565 let
|
adamc@86
|
2566 val () = subSgn (env, denv) sgn1 sgn2
|
adamc@66
|
2567 val env = E.pushStrNamedAs env x n1 sgn1
|
adamc@66
|
2568 val env = if n1 = n2 then
|
adamc@66
|
2569 env
|
adamc@66
|
2570 else
|
adamc@66
|
2571 E.pushStrNamedAs env x n2
|
adamc@66
|
2572 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
|
adamc@66
|
2573 sgn = sgn2})
|
adamc@66
|
2574 in
|
adamc@88
|
2575 SOME (env, denv)
|
adamc@66
|
2576 end
|
adamc@41
|
2577 else
|
adamc@41
|
2578 NONE
|
adamc@33
|
2579 | _ => NONE)
|
adamc@59
|
2580
|
adamc@59
|
2581 | L'.SgiSgn (x, n2, sgn2) =>
|
adamc@59
|
2582 seek (fn sgi1All as (sgi1, _) =>
|
adamc@59
|
2583 case sgi1 of
|
adamc@59
|
2584 L'.SgiSgn (x', n1, sgn1) =>
|
adamc@59
|
2585 if x = x' then
|
adamc@65
|
2586 let
|
adamc@86
|
2587 val () = subSgn (env, denv) sgn1 sgn2
|
adamc@86
|
2588 val () = subSgn (env, denv) sgn2 sgn1
|
adamc@65
|
2589
|
adamc@65
|
2590 val env = E.pushSgnNamedAs env x n2 sgn2
|
adamc@65
|
2591 val env = if n1 = n2 then
|
adamc@65
|
2592 env
|
adamc@65
|
2593 else
|
adamc@65
|
2594 E.pushSgnNamedAs env x n1 sgn2
|
adamc@65
|
2595 in
|
adamc@88
|
2596 SOME (env, denv)
|
adamc@65
|
2597 end
|
adamc@59
|
2598 else
|
adamc@59
|
2599 NONE
|
adamc@59
|
2600 | _ => NONE)
|
adamc@88
|
2601
|
adamc@88
|
2602 | L'.SgiConstraint (c2, d2) =>
|
adamc@88
|
2603 seek (fn sgi1All as (sgi1, _) =>
|
adamc@88
|
2604 case sgi1 of
|
adamc@88
|
2605 L'.SgiConstraint (c1, d1) =>
|
adamc@88
|
2606 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
|
adamc@90
|
2607 let
|
adamc@90
|
2608 val (denv, gs) = D.assert env denv (c2, d2)
|
adamc@90
|
2609 in
|
adamc@90
|
2610 case gs of
|
adamc@90
|
2611 [] => ()
|
adamc@90
|
2612 | _ => raise Fail "subSgn: Sub-constraints remain";
|
adamc@90
|
2613
|
adamc@90
|
2614 SOME (env, denv)
|
adamc@90
|
2615 end
|
adamc@88
|
2616 else
|
adamc@88
|
2617 NONE
|
adamc@88
|
2618 | _ => NONE)
|
adamc@203
|
2619
|
adamc@205
|
2620 | L'.SgiTable (_, x, n2, c2) =>
|
adamc@203
|
2621 seek (fn sgi1All as (sgi1, _) =>
|
adamc@203
|
2622 case sgi1 of
|
adamc@205
|
2623 L'.SgiTable (_, x', n1, c1) =>
|
adamc@203
|
2624 if x = x' then
|
adamc@203
|
2625 (case unifyCons (env, denv) c1 c2 of
|
adamc@203
|
2626 [] => SOME (env, denv)
|
adamc@203
|
2627 | _ => NONE)
|
adamc@203
|
2628 handle CUnify (c1, c2, err) =>
|
adamc@203
|
2629 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@203
|
2630 SOME (env, denv))
|
adamc@203
|
2631 else
|
adamc@203
|
2632 NONE
|
adamc@203
|
2633 | _ => NONE)
|
adamc@211
|
2634
|
adamc@211
|
2635 | L'.SgiClassAbs (x, n2) =>
|
adamc@211
|
2636 seek (fn sgi1All as (sgi1, _) =>
|
adamc@211
|
2637 let
|
adamc@211
|
2638 fun found (x', n1, co) =
|
adamc@211
|
2639 if x = x' then
|
adamc@211
|
2640 let
|
adamc@211
|
2641 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2642 val env = E.pushCNamedAs env x n1 k co
|
adamc@211
|
2643 in
|
adamc@211
|
2644 SOME (if n1 = n2 then
|
adamc@211
|
2645 env
|
adamc@211
|
2646 else
|
adamc@211
|
2647 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
|
adamc@211
|
2648 denv)
|
adamc@211
|
2649 end
|
adamc@211
|
2650 else
|
adamc@211
|
2651 NONE
|
adamc@211
|
2652 in
|
adamc@211
|
2653 case sgi1 of
|
adamc@211
|
2654 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
|
adamc@211
|
2655 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
|
adamc@211
|
2656 | _ => NONE
|
adamc@211
|
2657 end)
|
adamc@211
|
2658 | L'.SgiClass (x, n2, c2) =>
|
adamc@211
|
2659 seek (fn sgi1All as (sgi1, _) =>
|
adamc@211
|
2660 let
|
adamc@211
|
2661 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
2662
|
adamc@211
|
2663 fun found (x', n1, c1) =
|
adamc@211
|
2664 if x = x' then
|
adamc@211
|
2665 let
|
adamc@218
|
2666 fun good () =
|
adamc@218
|
2667 let
|
adamc@218
|
2668 val env = E.pushCNamedAs env x n2 k (SOME c2)
|
adamc@218
|
2669 val env = if n1 = n2 then
|
adamc@218
|
2670 env
|
adamc@218
|
2671 else
|
adamc@218
|
2672 E.pushCNamedAs env x n1 k (SOME c1)
|
adamc@218
|
2673 in
|
adamc@218
|
2674 SOME (env, denv)
|
adamc@218
|
2675 end
|
adamc@211
|
2676 in
|
adamc@211
|
2677 (case unifyCons (env, denv) c1 c2 of
|
adamc@211
|
2678 [] => good ()
|
adamc@211
|
2679 | _ => NONE)
|
adamc@211
|
2680 handle CUnify (c1, c2, err) =>
|
adamc@211
|
2681 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
|
adamc@211
|
2682 good ())
|
adamc@211
|
2683 end
|
adamc@211
|
2684 else
|
adamc@211
|
2685 NONE
|
adamc@211
|
2686 in
|
adamc@211
|
2687 case sgi1 of
|
adamc@211
|
2688 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
|
adamc@211
|
2689 | _ => NONE
|
adamc@211
|
2690 end)
|
adamc@31
|
2691 end
|
adamc@31
|
2692 in
|
adamc@88
|
2693 ignore (foldl folder (env, denv) sgis2)
|
adamc@31
|
2694 end
|
adamc@31
|
2695
|
adamc@41
|
2696 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
|
adamc@43
|
2697 let
|
adamc@43
|
2698 val ran1 =
|
adamc@43
|
2699 if n1 = n2 then
|
adamc@43
|
2700 ran1
|
adamc@43
|
2701 else
|
adamc@43
|
2702 subStrInSgn (n1, n2) ran1
|
adamc@43
|
2703 in
|
adamc@86
|
2704 subSgn (env, denv) dom2 dom1;
|
adamc@86
|
2705 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
|
adamc@43
|
2706 end
|
adamc@41
|
2707
|
adamc@41
|
2708 | _ => sgnError env (SgnWrongForm (sgn1, sgn2))
|
adamc@41
|
2709
|
adamc@61
|
2710
|
adamc@228
|
2711 fun elabDecl ((d, loc), (env, denv, gs : constraint list)) =
|
adamc@76
|
2712 case d of
|
adamc@76
|
2713 L.DCon (x, ko, c) =>
|
adamc@76
|
2714 let
|
adamc@76
|
2715 val k' = case ko of
|
adamc@76
|
2716 NONE => kunif loc
|
adamc@76
|
2717 | SOME k => elabKind k
|
adamc@76
|
2718
|
adamc@83
|
2719 val (c', ck, gs') = elabCon (env, denv) c
|
adamc@76
|
2720 val (env', n) = E.pushCNamed env x k' (SOME c')
|
adamc@76
|
2721 in
|
adamc@76
|
2722 checkKind env c' ck k';
|
adamc@76
|
2723
|
adamc@228
|
2724 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
|
adamc@76
|
2725 end
|
adamc@191
|
2726 | L.DDatatype (x, xs, xcs) =>
|
adamc@156
|
2727 let
|
adamc@156
|
2728 val k = (L'.KType, loc)
|
adamc@191
|
2729 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@191
|
2730 val (env, n) = E.pushCNamed env x k' NONE
|
adamc@156
|
2731 val t = (L'.CNamed n, loc)
|
adamc@194
|
2732 val nxs = length xs - 1
|
adamc@194
|
2733 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
|
adamc@191
|
2734
|
adamc@191
|
2735 val (env', denv') = foldl (fn (x, (env', denv')) =>
|
adamc@191
|
2736 (E.pushCRel env' x k,
|
adamc@191
|
2737 D.enter denv')) (env, denv) xs
|
adamc@156
|
2738
|
adamc@156
|
2739 val (xcs, (used, env, gs)) =
|
adamc@156
|
2740 ListUtil.foldlMap
|
adamc@156
|
2741 (fn ((x, to), (used, env, gs)) =>
|
adamc@156
|
2742 let
|
adamc@156
|
2743 val (to, t, gs') = case to of
|
adamc@156
|
2744 NONE => (NONE, t, gs)
|
adamc@156
|
2745 | SOME t' =>
|
adamc@156
|
2746 let
|
adamc@191
|
2747 val (t', tk, gs') = elabCon (env', denv') t'
|
adamc@156
|
2748 in
|
adamc@191
|
2749 checkKind env' t' tk k;
|
adamc@228
|
2750 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
|
adamc@156
|
2751 end
|
adamc@191
|
2752 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
|
adamc@156
|
2753
|
adamc@156
|
2754 val (env, n') = E.pushENamed env x t
|
adamc@156
|
2755 in
|
adamc@156
|
2756 if SS.member (used, x) then
|
adamc@156
|
2757 strError env (DuplicateConstructor (x, loc))
|
adamc@156
|
2758 else
|
adamc@156
|
2759 ();
|
adamc@156
|
2760 ((x, n', to), (SS.add (used, x), env, gs'))
|
adamc@156
|
2761 end)
|
adamc@156
|
2762 (SS.empty, env, []) xcs
|
adamc@171
|
2763
|
adamc@191
|
2764 val env = E.pushDatatype env n xs xcs
|
adamc@156
|
2765 in
|
adamc@191
|
2766 ([(L'.DDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
|
adamc@156
|
2767 end
|
adamc@156
|
2768
|
adamc@157
|
2769 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
|
adamc@157
|
2770
|
adamc@157
|
2771 | L.DDatatypeImp (x, m1 :: ms, s) =>
|
adamc@157
|
2772 (case E.lookupStr env m1 of
|
adamc@157
|
2773 NONE => (expError env (UnboundStrInExp (loc, m1));
|
adamc@157
|
2774 ([], (env, denv, gs)))
|
adamc@157
|
2775 | SOME (n, sgn) =>
|
adamc@157
|
2776 let
|
adamc@157
|
2777 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@157
|
2778 case E.projectStr env {sgn = sgn, str = str, field = m} of
|
adamc@157
|
2779 NONE => (conError env (UnboundStrInCon (loc, m));
|
adamc@157
|
2780 (strerror, sgnerror))
|
adamc@157
|
2781 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@157
|
2782 ((L'.StrVar n, loc), sgn) ms
|
adamc@157
|
2783 in
|
adamc@158
|
2784 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
|
adamc@228
|
2785 ((L'.CModProj (n, ms, s), _), gs') =>
|
adamc@158
|
2786 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
|
adamc@158
|
2787 NONE => (conError env (UnboundDatatype (loc, s));
|
adamc@158
|
2788 ([], (env, denv, gs)))
|
adamc@191
|
2789 | SOME (xs, xncs) =>
|
adamc@158
|
2790 let
|
adamc@158
|
2791 val k = (L'.KType, loc)
|
adamc@191
|
2792 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
|
adamc@158
|
2793 val t = (L'.CModProj (n, ms, s), loc)
|
adamc@191
|
2794 val (env, n') = E.pushCNamed env x k' (SOME t)
|
adamc@191
|
2795 val env = E.pushDatatype env n' xs xncs
|
adamc@157
|
2796
|
adamc@158
|
2797 val t = (L'.CNamed n', loc)
|
adamc@158
|
2798 val env = foldl (fn ((x, n, to), env) =>
|
adamc@158
|
2799 let
|
adamc@158
|
2800 val t = case to of
|
adamc@158
|
2801 NONE => t
|
adamc@158
|
2802 | SOME t' => (L'.TFun (t', t), loc)
|
adamc@191
|
2803
|
adamc@191
|
2804 val t = foldr (fn (x, t) =>
|
adamc@191
|
2805 (L'.TCFun (L'.Implicit, x, k, t), loc))
|
adamc@191
|
2806 t xs
|
adamc@158
|
2807 in
|
adamc@158
|
2808 E.pushENamedAs env x n t
|
adamc@158
|
2809 end) env xncs
|
adamc@158
|
2810 in
|
adamc@228
|
2811 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, enD gs' @ gs))
|
adamc@158
|
2812 end)
|
adamc@158
|
2813 | _ => (strError env (NotDatatype loc);
|
adamc@158
|
2814 ([], (env, denv, [])))
|
adamc@157
|
2815 end)
|
adamc@157
|
2816
|
adamc@76
|
2817 | L.DVal (x, co, e) =>
|
adamc@76
|
2818 let
|
adamc@123
|
2819 val (c', _, gs1) = case co of
|
adamc@83
|
2820 NONE => (cunif (loc, ktype), ktype, [])
|
adamc@83
|
2821 | SOME c => elabCon (env, denv) c
|
adamc@76
|
2822
|
adamc@83
|
2823 val (e', et, gs2) = elabExp (env, denv) e
|
adamc@217
|
2824 val gs3 = checkCon (env, denv) e' et c'
|
adamc@217
|
2825 val (c', gs4) = normClassConstraint (env, denv) c'
|
adamc@76
|
2826 val (env', n) = E.pushENamed env x c'
|
adamc@76
|
2827 in
|
adamc@217
|
2828 (*prefaces "DVal" [("x", Print.PD.string x),
|
adamc@217
|
2829 ("c'", p_con env c')];*)
|
adamc@228
|
2830 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ enD gs3 @ enD gs4 @ gs))
|
adamc@76
|
2831 end
|
adamc@123
|
2832 | L.DValRec vis =>
|
adamc@123
|
2833 let
|
adamc@238
|
2834 fun allowable (e, _) =
|
adamc@238
|
2835 case e of
|
adamc@238
|
2836 L.EAbs _ => true
|
adamc@238
|
2837 | L.ECAbs (_, _, _, e) => allowable e
|
adamc@238
|
2838 | L.EDisjoint (_, _, e) => allowable e
|
adamc@238
|
2839 | _ => false
|
adamc@238
|
2840
|
adamc@123
|
2841 val (vis, gs) = ListUtil.foldlMap
|
adamc@123
|
2842 (fn ((x, co, e), gs) =>
|
adamc@123
|
2843 let
|
adamc@123
|
2844 val (c', _, gs1) = case co of
|
adamc@123
|
2845 NONE => (cunif (loc, ktype), ktype, [])
|
adamc@123
|
2846 | SOME c => elabCon (env, denv) c
|
adamc@123
|
2847 in
|
adamc@228
|
2848 ((x, c', e), enD gs1 @ gs)
|
adamc@123
|
2849 end) [] vis
|
adamc@123
|
2850
|
adamc@123
|
2851 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
|
adamc@123
|
2852 let
|
adamc@123
|
2853 val (env, n) = E.pushENamed env x c'
|
adamc@123
|
2854 in
|
adamc@123
|
2855 ((x, n, c', e), env)
|
adamc@123
|
2856 end) env vis
|
adamc@123
|
2857
|
adamc@123
|
2858 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
|
adamc@123
|
2859 let
|
adamc@123
|
2860 val (e', et, gs1) = elabExp (env, denv) e
|
adamc@123
|
2861
|
adamc@123
|
2862 val gs2 = checkCon (env, denv) e' et c'
|
adamc@123
|
2863 in
|
adamc@238
|
2864 if allowable e then
|
adamc@238
|
2865 ()
|
adamc@238
|
2866 else
|
adamc@238
|
2867 expError env (IllegalRec (x, e'));
|
adamc@228
|
2868 ((x, n, c', e'), gs1 @ enD gs2 @ gs)
|
adamc@123
|
2869 end) gs vis
|
adamc@123
|
2870 in
|
adamc@123
|
2871 ([(L'.DValRec vis, loc)], (env, denv, gs))
|
adamc@123
|
2872 end
|
adamc@76
|
2873
|
adamc@76
|
2874 | L.DSgn (x, sgn) =>
|
adamc@76
|
2875 let
|
adamc@83
|
2876 val (sgn', gs') = elabSgn (env, denv) sgn
|
adamc@76
|
2877 val (env', n) = E.pushSgnNamed env x sgn'
|
adamc@76
|
2878 in
|
adamc@228
|
2879 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
|
adamc@76
|
2880 end
|
adamc@76
|
2881
|
adamc@76
|
2882 | L.DStr (x, sgno, str) =>
|
adamc@76
|
2883 let
|
adamc@93
|
2884 val () = if x = "Basis" then
|
adamc@93
|
2885 raise Fail "Not allowed to redefine structure 'Basis'"
|
adamc@93
|
2886 else
|
adamc@93
|
2887 ()
|
adamc@93
|
2888
|
adamc@83
|
2889 val formal = Option.map (elabSgn (env, denv)) sgno
|
adamc@76
|
2890
|
adamc@83
|
2891 val (str', sgn', gs') =
|
adamc@78
|
2892 case formal of
|
adamc@78
|
2893 NONE =>
|
adamc@78
|
2894 let
|
adamc@83
|
2895 val (str', actual, ds) = elabStr (env, denv) str
|
adamc@78
|
2896 in
|
adamc@83
|
2897 (str', selfifyAt env {str = str', sgn = actual}, ds)
|
adamc@78
|
2898 end
|
adamc@83
|
2899 | SOME (formal, gs1) =>
|
adamc@78
|
2900 let
|
adamc@78
|
2901 val str =
|
adamc@78
|
2902 case #1 (hnormSgn env formal) of
|
adamc@78
|
2903 L'.SgnConst sgis =>
|
adamc@78
|
2904 (case #1 str of
|
adamc@78
|
2905 L.StrConst ds =>
|
adamc@78
|
2906 let
|
adamc@78
|
2907 val needed = foldl (fn ((sgi, _), needed) =>
|
adamc@78
|
2908 case sgi of
|
adamc@78
|
2909 L'.SgiConAbs (x, _, _) => SS.add (needed, x)
|
adamc@78
|
2910 | _ => needed)
|
adamc@78
|
2911 SS.empty sgis
|
adamc@78
|
2912
|
adamc@78
|
2913 val needed = foldl (fn ((d, _), needed) =>
|
adamc@78
|
2914 case d of
|
adamc@78
|
2915 L.DCon (x, _, _) => (SS.delete (needed, x)
|
adamc@78
|
2916 handle NotFound => needed)
|
adamc@218
|
2917 | L.DClass (x, _) => (SS.delete (needed, x)
|
adamc@218
|
2918 handle NotFound => needed)
|
adamc@78
|
2919 | L.DOpen _ => SS.empty
|
adamc@78
|
2920 | _ => needed)
|
adamc@78
|
2921 needed ds
|
adamc@78
|
2922 in
|
adamc@78
|
2923 case SS.listItems needed of
|
adamc@78
|
2924 [] => str
|
adamc@78
|
2925 | xs =>
|
adamc@78
|
2926 let
|
adamc@78
|
2927 val kwild = (L.KWild, #2 str)
|
adamc@78
|
2928 val cwild = (L.CWild kwild, #2 str)
|
adamc@78
|
2929 val ds' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
|
adamc@78
|
2930 in
|
adamc@78
|
2931 (L.StrConst (ds @ ds'), #2 str)
|
adamc@78
|
2932 end
|
adamc@78
|
2933 end
|
adamc@78
|
2934 | _ => str)
|
adamc@78
|
2935 | _ => str
|
adamc@78
|
2936
|
adamc@83
|
2937 val (str', actual, gs2) = elabStr (env, denv) str
|
adamc@78
|
2938 in
|
adamc@158
|
2939 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
|
adamc@228
|
2940 (str', formal, enD gs1 @ gs2)
|
adamc@78
|
2941 end
|
adamc@76
|
2942
|
adamc@76
|
2943 val (env', n) = E.pushStrNamed env x sgn'
|
adamc@76
|
2944 in
|
adamc@76
|
2945 case #1 (hnormSgn env sgn') of
|
adamc@76
|
2946 L'.SgnFun _ =>
|
adamc@76
|
2947 (case #1 str' of
|
adamc@76
|
2948 L'.StrFun _ => ()
|
adamc@76
|
2949 | _ => strError env (FunctorRebind loc))
|
adamc@76
|
2950 | _ => ();
|
adamc@76
|
2951
|
adamc@88
|
2952 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
|
adamc@76
|
2953 end
|
adamc@76
|
2954
|
adamc@76
|
2955 | L.DFfiStr (x, sgn) =>
|
adamc@76
|
2956 let
|
adamc@83
|
2957 val (sgn', gs') = elabSgn (env, denv) sgn
|
adamc@76
|
2958
|
adamc@76
|
2959 val (env', n) = E.pushStrNamed env x sgn'
|
adamc@76
|
2960 in
|
adamc@228
|
2961 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
|
adamc@76
|
2962 end
|
adamc@76
|
2963
|
adamc@76
|
2964 | L.DOpen (m, ms) =>
|
adamc@88
|
2965 (case E.lookupStr env m of
|
adamc@88
|
2966 NONE => (strError env (UnboundStr (loc, m));
|
adamc@205
|
2967 ([], (env, denv, gs)))
|
adamc@88
|
2968 | SOME (n, sgn) =>
|
adamc@88
|
2969 let
|
adamc@88
|
2970 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
|
adamc@88
|
2971 case E.projectStr env {str = str, sgn = sgn, field = m} of
|
adamc@88
|
2972 NONE => (strError env (UnboundStr (loc, m));
|
adamc@88
|
2973 (strerror, sgnerror))
|
adamc@88
|
2974 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
|
adamc@88
|
2975 ((L'.StrVar n, loc), sgn) ms
|
adamc@83
|
2976
|
adamc@88
|
2977 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
|
adamc@88
|
2978 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
|
adamc@88
|
2979 in
|
adamc@205
|
2980 (ds, (env', denv', gs))
|
adamc@88
|
2981 end)
|
adamc@88
|
2982
|
adamc@88
|
2983 | L.DConstraint (c1, c2) =>
|
adamc@88
|
2984 let
|
adamc@88
|
2985 val (c1', k1, gs1) = elabCon (env, denv) c1
|
adamc@88
|
2986 val (c2', k2, gs2) = elabCon (env, denv) c2
|
adamc@90
|
2987 val gs3 = D.prove env denv (c1', c2', loc)
|
adamc@88
|
2988
|
adamc@90
|
2989 val (denv', gs4) = D.assert env denv (c1', c2')
|
adamc@88
|
2990 in
|
adamc@88
|
2991 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
|
adamc@88
|
2992 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
|
adamc@88
|
2993
|
adamc@228
|
2994 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ enD gs4 @ gs))
|
adamc@88
|
2995 end
|
adamc@88
|
2996
|
adamc@88
|
2997 | L.DOpenConstraints (m, ms) =>
|
adamc@88
|
2998 let
|
adamc@88
|
2999 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
|
adamc@88
|
3000 in
|
adamc@205
|
3001 ([], (env, denv, gs))
|
adamc@88
|
3002 end
|
adamc@3
|
3003
|
adamc@109
|
3004 | L.DExport str =>
|
adamc@100
|
3005 let
|
adamc@205
|
3006 val (str', sgn, gs') = elabStr (env, denv) str
|
adamc@100
|
3007
|
adamc@109
|
3008 val sgn =
|
adamc@109
|
3009 case #1 (hnormSgn env sgn) of
|
adamc@109
|
3010 L'.SgnConst sgis =>
|
adamc@109
|
3011 let
|
adamc@146
|
3012 fun doOne (all as (sgi, _), env) =
|
adamc@146
|
3013 (case sgi of
|
adamc@146
|
3014 L'.SgiVal (x, n, t) =>
|
adamc@146
|
3015 (case hnormCon (env, denv) t of
|
adamc@146
|
3016 ((L'.TFun (dom, ran), _), []) =>
|
adamc@146
|
3017 (case (hnormCon (env, denv) dom, hnormCon (env, denv) ran) of
|
adamc@146
|
3018 (((L'.TRecord domR, _), []),
|
adamc@146
|
3019 ((L'.CApp (tf, arg3), _), [])) =>
|
adamc@146
|
3020 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
|
adamc@146
|
3021 (((L'.CApp (tf, arg2), _), []),
|
adamc@146
|
3022 (((L'.CRecord (_, []), _), []))) =>
|
adamc@146
|
3023 (case (hnormCon (env, denv) tf) of
|
adamc@146
|
3024 ((L'.CApp (tf, arg1), _), []) =>
|
adamc@146
|
3025 (case (hnormCon (env, denv) tf,
|
adamc@146
|
3026 hnormCon (env, denv) domR,
|
adamc@152
|
3027 hnormCon (env, denv) arg1,
|
adamc@146
|
3028 hnormCon (env, denv) arg2) of
|
adamc@152
|
3029 ((tf, []), (domR, []), (arg1, []),
|
adamc@146
|
3030 ((L'.CRecord (_, []), _), [])) =>
|
adamc@146
|
3031 let
|
adamc@146
|
3032 val t = (L'.CApp (tf, arg1), loc)
|
adamc@146
|
3033 val t = (L'.CApp (t, arg2), loc)
|
adamc@146
|
3034 val t = (L'.CApp (t, arg3), loc)
|
adamc@146
|
3035 in
|
adamc@146
|
3036 (L'.SgiVal (x, n, (L'.TFun ((L'.TRecord domR, loc),
|
adamc@146
|
3037 t),
|
adamc@146
|
3038 loc)), loc)
|
adamc@146
|
3039 end
|
adamc@146
|
3040 | _ => all)
|
adamc@146
|
3041 | _ => all)
|
adamc@146
|
3042 | _ => all)
|
adamc@146
|
3043 | _ => all)
|
adamc@146
|
3044 | _ => all)
|
adamc@146
|
3045 | _ => all,
|
adamc@146
|
3046 E.sgiBinds env all)
|
adamc@109
|
3047 in
|
adamc@146
|
3048 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
|
adamc@109
|
3049 end
|
adamc@109
|
3050 | _ => sgn
|
adamc@100
|
3051 in
|
adamc@205
|
3052 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
|
adamc@100
|
3053 end
|
adamc@100
|
3054
|
adamc@203
|
3055 | L.DTable (x, c) =>
|
adamc@203
|
3056 let
|
adamc@205
|
3057 val (c', k, gs') = elabCon (env, denv) c
|
adamc@210
|
3058 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
|
adamc@203
|
3059 in
|
adamc@203
|
3060 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
|
adamc@228
|
3061 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
|
adamc@203
|
3062 end
|
adamc@203
|
3063
|
adamc@211
|
3064 | L.DClass (x, c) =>
|
adamc@211
|
3065 let
|
adamc@211
|
3066 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
3067 val (c', ck, gs) = elabCon (env, denv) c
|
adamc@211
|
3068 val (env, n) = E.pushCNamed env x k (SOME c')
|
adamc@211
|
3069 val env = E.pushClass env n
|
adamc@211
|
3070 in
|
adamc@211
|
3071 checkKind env c' ck k;
|
adamc@213
|
3072 ([(L'.DClass (x, n, c'), loc)], (env, denv, []))
|
adamc@211
|
3073 end
|
adamc@211
|
3074
|
adamc@83
|
3075 and elabStr (env, denv) (str, loc) =
|
adamc@31
|
3076 case str of
|
adamc@31
|
3077 L.StrConst ds =>
|
adamc@31
|
3078 let
|
adamc@88
|
3079 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
|
adamc@123
|
3080 val sgis = ListUtil.mapConcat sgiOfDecl ds'
|
adamc@63
|
3081
|
adamc@63
|
3082 val (sgis, _, _, _, _) =
|
adamc@64
|
3083 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
|
adamc@63
|
3084 case sgi of
|
adamc@64
|
3085 L'.SgiConAbs (x, n, k) =>
|
adamc@64
|
3086 let
|
adamc@64
|
3087 val (cons, x) =
|
adamc@64
|
3088 if SS.member (cons, x) then
|
adamc@64
|
3089 (cons, "?" ^ x)
|
adamc@64
|
3090 else
|
adamc@64
|
3091 (SS.add (cons, x), x)
|
adamc@64
|
3092 in
|
adamc@64
|
3093 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@64
|
3094 end
|
adamc@64
|
3095 | L'.SgiCon (x, n, k, c) =>
|
adamc@64
|
3096 let
|
adamc@64
|
3097 val (cons, x) =
|
adamc@64
|
3098 if SS.member (cons, x) then
|
adamc@64
|
3099 (cons, "?" ^ x)
|
adamc@64
|
3100 else
|
adamc@64
|
3101 (SS.add (cons, x), x)
|
adamc@64
|
3102 in
|
adamc@64
|
3103 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@64
|
3104 end
|
adamc@191
|
3105 | L'.SgiDatatype (x, n, xs, xncs) =>
|
adamc@156
|
3106 let
|
adamc@156
|
3107 val (cons, x) =
|
adamc@156
|
3108 if SS.member (cons, x) then
|
adamc@156
|
3109 (cons, "?" ^ x)
|
adamc@156
|
3110 else
|
adamc@156
|
3111 (SS.add (cons, x), x)
|
adamc@156
|
3112
|
adamc@156
|
3113 val (xncs, vals) =
|
adamc@156
|
3114 ListUtil.foldlMap
|
adamc@156
|
3115 (fn ((x, n, t), vals) =>
|
adamc@156
|
3116 if SS.member (vals, x) then
|
adamc@156
|
3117 (("?" ^ x, n, t), vals)
|
adamc@156
|
3118 else
|
adamc@156
|
3119 ((x, n, t), SS.add (vals, x)))
|
adamc@156
|
3120 vals xncs
|
adamc@156
|
3121 in
|
adamc@191
|
3122 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@156
|
3123 end
|
adamc@191
|
3124 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
|
adamc@156
|
3125 let
|
adamc@156
|
3126 val (cons, x) =
|
adamc@156
|
3127 if SS.member (cons, x) then
|
adamc@156
|
3128 (cons, "?" ^ x)
|
adamc@156
|
3129 else
|
adamc@156
|
3130 (SS.add (cons, x), x)
|
adamc@156
|
3131 in
|
adamc@191
|
3132 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@156
|
3133 end
|
adamc@64
|
3134 | L'.SgiVal (x, n, c) =>
|
adamc@64
|
3135 let
|
adamc@64
|
3136 val (vals, x) =
|
adamc@64
|
3137 if SS.member (vals, x) then
|
adamc@64
|
3138 (vals, "?" ^ x)
|
adamc@64
|
3139 else
|
adamc@64
|
3140 (SS.add (vals, x), x)
|
adamc@64
|
3141 in
|
adamc@64
|
3142 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@64
|
3143 end
|
adamc@64
|
3144 | L'.SgiSgn (x, n, sgn) =>
|
adamc@64
|
3145 let
|
adamc@64
|
3146 val (sgns, x) =
|
adamc@64
|
3147 if SS.member (sgns, x) then
|
adamc@64
|
3148 (sgns, "?" ^ x)
|
adamc@64
|
3149 else
|
adamc@64
|
3150 (SS.add (sgns, x), x)
|
adamc@64
|
3151 in
|
adamc@64
|
3152 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@64
|
3153 end
|
adamc@64
|
3154
|
adamc@64
|
3155 | L'.SgiStr (x, n, sgn) =>
|
adamc@64
|
3156 let
|
adamc@64
|
3157 val (strs, x) =
|
adamc@64
|
3158 if SS.member (strs, x) then
|
adamc@64
|
3159 (strs, "?" ^ x)
|
adamc@64
|
3160 else
|
adamc@64
|
3161 (SS.add (strs, x), x)
|
adamc@64
|
3162 in
|
adamc@64
|
3163 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@88
|
3164 end
|
adamc@203
|
3165 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
|
adamc@205
|
3166 | L'.SgiTable (tn, x, n, c) =>
|
adamc@203
|
3167 let
|
adamc@203
|
3168 val (vals, x) =
|
adamc@203
|
3169 if SS.member (vals, x) then
|
adamc@203
|
3170 (vals, "?" ^ x)
|
adamc@203
|
3171 else
|
adamc@203
|
3172 (SS.add (vals, x), x)
|
adamc@203
|
3173 in
|
adamc@205
|
3174 ((L'.SgiTable (tn, x, n, c), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@211
|
3175 end
|
adamc@211
|
3176 | L'.SgiClassAbs (x, n) =>
|
adamc@211
|
3177 let
|
adamc@211
|
3178 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
3179
|
adamc@211
|
3180 val (cons, x) =
|
adamc@211
|
3181 if SS.member (cons, x) then
|
adamc@211
|
3182 (cons, "?" ^ x)
|
adamc@211
|
3183 else
|
adamc@211
|
3184 (SS.add (cons, x), x)
|
adamc@211
|
3185 in
|
adamc@211
|
3186 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@211
|
3187 end
|
adamc@211
|
3188 | L'.SgiClass (x, n, c) =>
|
adamc@211
|
3189 let
|
adamc@211
|
3190 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
|
adamc@211
|
3191
|
adamc@211
|
3192 val (cons, x) =
|
adamc@211
|
3193 if SS.member (cons, x) then
|
adamc@211
|
3194 (cons, "?" ^ x)
|
adamc@211
|
3195 else
|
adamc@211
|
3196 (SS.add (cons, x), x)
|
adamc@211
|
3197 in
|
adamc@211
|
3198 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
|
adamc@203
|
3199 end)
|
adamc@64
|
3200
|
adamc@63
|
3201 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
|
adamc@31
|
3202 in
|
adamc@83
|
3203 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
|
adamc@31
|
3204 end
|
adamc@31
|
3205 | L.StrVar x =>
|
adamc@31
|
3206 (case E.lookupStr env x of
|
adamc@31
|
3207 NONE =>
|
adamc@31
|
3208 (strError env (UnboundStr (loc, x));
|
adamc@83
|
3209 (strerror, sgnerror, []))
|
adamc@83
|
3210 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
|
adamc@34
|
3211 | L.StrProj (str, x) =>
|
adamc@34
|
3212 let
|
adamc@83
|
3213 val (str', sgn, gs) = elabStr (env, denv) str
|
adamc@34
|
3214 in
|
adamc@34
|
3215 case E.projectStr env {str = str', sgn = sgn, field = x} of
|
adamc@34
|
3216 NONE => (strError env (UnboundStr (loc, x));
|
adamc@83
|
3217 (strerror, sgnerror, []))
|
adamc@83
|
3218 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
|
adamc@34
|
3219 end
|
adamc@41
|
3220 | L.StrFun (m, dom, ranO, str) =>
|
adamc@41
|
3221 let
|
adamc@83
|
3222 val (dom', gs1) = elabSgn (env, denv) dom
|
adamc@41
|
3223 val (env', n) = E.pushStrNamed env m dom'
|
adamc@83
|
3224 val (str', actual, gs2) = elabStr (env', denv) str
|
adamc@41
|
3225
|
adamc@83
|
3226 val (formal, gs3) =
|
adamc@41
|
3227 case ranO of
|
adamc@83
|
3228 NONE => (actual, [])
|
adamc@41
|
3229 | SOME ran =>
|
adamc@41
|
3230 let
|
adamc@83
|
3231 val (ran', gs) = elabSgn (env', denv) ran
|
adamc@41
|
3232 in
|
adamc@86
|
3233 subSgn (env', denv) actual ran';
|
adamc@83
|
3234 (ran', gs)
|
adamc@41
|
3235 end
|
adamc@41
|
3236 in
|
adamc@41
|
3237 ((L'.StrFun (m, n, dom', formal, str'), loc),
|
adamc@83
|
3238 (L'.SgnFun (m, n, dom', formal), loc),
|
adamc@228
|
3239 enD gs1 @ gs2 @ enD gs3)
|
adamc@41
|
3240 end
|
adamc@44
|
3241 | L.StrApp (str1, str2) =>
|
adamc@44
|
3242 let
|
adamc@83
|
3243 val (str1', sgn1, gs1) = elabStr (env, denv) str1
|
adamc@83
|
3244 val (str2', sgn2, gs2) = elabStr (env, denv) str2
|
adamc@44
|
3245 in
|
adamc@44
|
3246 case #1 (hnormSgn env sgn1) of
|
adamc@83
|
3247 L'.SgnError => (strerror, sgnerror, [])
|
adamc@44
|
3248 | L'.SgnFun (m, n, dom, ran) =>
|
adamc@86
|
3249 (subSgn (env, denv) sgn2 dom;
|
adamc@44
|
3250 case #1 (hnormSgn env ran) of
|
adamc@83
|
3251 L'.SgnError => (strerror, sgnerror, [])
|
adamc@44
|
3252 | L'.SgnConst sgis =>
|
adamc@44
|
3253 ((L'.StrApp (str1', str2'), loc),
|
adamc@83
|
3254 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
|
adamc@83
|
3255 gs1 @ gs2)
|
adamc@44
|
3256 | _ => raise Fail "Unable to hnormSgn in functor application")
|
adamc@44
|
3257 | _ => (strError env (NotFunctor sgn1);
|
adamc@83
|
3258 (strerror, sgnerror, []))
|
adamc@44
|
3259 end
|
adamc@31
|
3260
|
adamc@56
|
3261 fun elabFile basis env file =
|
adamc@56
|
3262 let
|
adamc@83
|
3263 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
|
adamc@83
|
3264 val () = case gs of
|
adamc@83
|
3265 [] => ()
|
adamc@207
|
3266 | _ => (app (fn (_, env, _, c1, c2) =>
|
adamc@207
|
3267 prefaces "Unresolved"
|
adamc@207
|
3268 [("c1", p_con env c1),
|
adamc@207
|
3269 ("c2", p_con env c2)]) gs;
|
adamc@207
|
3270 raise Fail "Unresolved disjointness constraints in Basis")
|
adamc@83
|
3271
|
adamc@56
|
3272 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
|
adamc@210
|
3273 val () = basis_r := basis_n
|
adamc@56
|
3274
|
adamc@88
|
3275 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
|
adamc@56
|
3276
|
adamc@56
|
3277 fun discoverC r x =
|
adamc@56
|
3278 case E.lookupC env' x of
|
adamc@56
|
3279 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
|
adamc@56
|
3280 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
|
adamc@56
|
3281 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
|
adamc@56
|
3282
|
adamc@56
|
3283 val () = discoverC int "int"
|
adamc@56
|
3284 val () = discoverC float "float"
|
adamc@56
|
3285 val () = discoverC string "string"
|
adamc@203
|
3286 val () = discoverC table "sql_table"
|
adamc@56
|
3287
|
adamc@83
|
3288 fun elabDecl' (d, (env, gs)) =
|
adamc@76
|
3289 let
|
adamc@76
|
3290 val () = resetKunif ()
|
adamc@76
|
3291 val () = resetCunif ()
|
adamc@88
|
3292 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
|
adamc@76
|
3293 in
|
adamc@76
|
3294 if ErrorMsg.anyErrors () then
|
adamc@76
|
3295 ()
|
adamc@76
|
3296 else (
|
adamc@76
|
3297 if List.exists kunifsInDecl ds then
|
adamc@91
|
3298 declError env (KunifsRemain ds)
|
adamc@76
|
3299 else
|
adamc@76
|
3300 ();
|
adamc@76
|
3301
|
adamc@76
|
3302 case ListUtil.search cunifsInDecl ds of
|
adamc@76
|
3303 NONE => ()
|
adamc@76
|
3304 | SOME loc =>
|
adamc@91
|
3305 declError env (CunifsRemain ds)
|
adamc@76
|
3306 );
|
adamc@76
|
3307
|
adamc@83
|
3308 (ds, (env, gs))
|
adamc@76
|
3309 end
|
adamc@76
|
3310
|
adamc@83
|
3311 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
|
adamc@56
|
3312 in
|
adamc@84
|
3313 if ErrorMsg.anyErrors () then
|
adamc@84
|
3314 ()
|
adamc@84
|
3315 else
|
adamc@228
|
3316 app (fn Disjoint (loc, env, denv, c1, c2) =>
|
adamc@228
|
3317 (case D.prove env denv (c1, c2, loc) of
|
adamc@228
|
3318 [] => ()
|
adamc@228
|
3319 | _ =>
|
adamc@228
|
3320 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
|
adamc@228
|
3321 eprefaces' [("Con 1", p_con env c1),
|
adamc@228
|
3322 ("Con 2", p_con env c2),
|
adamc@228
|
3323 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
|
adamc@228
|
3324 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))]))
|
adamc@228
|
3325 | TypeClass (env, c, r, loc) =>
|
adamc@228
|
3326 case E.resolveClass env c of
|
adamc@228
|
3327 SOME e => r := SOME e
|
adamc@228
|
3328 | NONE => expError env (Unresolvable (loc, c))) gs;
|
adamc@83
|
3329
|
adamc@56
|
3330 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan) :: ds @ file
|
adamc@56
|
3331 end
|
adamc@2
|
3332
|
adamc@2
|
3333 end
|