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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 (* Pretty-printing core Laconic/Web *)
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29
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30 structure CorePrint :> CORE_PRINT = struct
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31
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32 open Print.PD
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33 open Print
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34
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35 open Core
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36
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37 structure E = CoreEnv
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38
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39 val debug = ref false
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40
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41 fun p_kind' par (k, _) =
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42 case k of
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43 KType => string "Type"
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44 | KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
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45 space,
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46 string "->",
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47 space,
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48 p_kind k2])
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49 | KName => string "Name"
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50 | KRecord k => box [string "{", p_kind k, string "}"]
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51 | KUnit => string "Unit"
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52
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53 and p_kind k = p_kind' false k
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54
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55 fun p_con' par env (c, _) =
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56 case c of
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57 TFun (t1, t2) => parenIf par (box [p_con' true env t1,
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58 space,
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59 string "->",
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60 space,
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61 p_con env t2])
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62 | TCFun (x, k, c) => parenIf par (box [string x,
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63 space,
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64 string "::",
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65 space,
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66 p_kind k,
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67 space,
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68 string "->",
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69 space,
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70 p_con (E.pushCRel env x k) c])
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71 | TRecord (CRecord (_, xcs), _) => box [string "{",
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72 p_list (fn (x, c) =>
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73 box [p_name env x,
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74 space,
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75 string ":",
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76 space,
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77 p_con env c]) xcs,
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78 string "}"]
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79 | TRecord c => box [string "$",
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80 p_con' true env c]
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81
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82 | CRel n =>
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83 ((if !debug then
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84 string (#1 (E.lookupCRel env n) ^ "_" ^ Int.toString n)
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85 else
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86 string (#1 (E.lookupCRel env n)))
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87 handle E.UnboundRel _ => string ("UNBOUND_" ^ Int.toString n))
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88 | CNamed n =>
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89 ((if !debug then
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90 string (#1 (E.lookupCNamed env n) ^ "__" ^ Int.toString n)
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91 else
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92 string (#1 (E.lookupCNamed env n)))
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93 handle E.UnboundNamed _ => string ("UNBOUNDN_" ^ Int.toString n))
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94 | CFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]
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95
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96 | CApp (c1, c2) => parenIf par (box [p_con env c1,
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97 space,
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98 p_con' true env c2])
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99 | CAbs (x, k, c) => parenIf par (box [string "fn",
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100 space,
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101 string x,
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102 space,
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103 string "::",
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104 space,
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105 p_kind k,
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106 space,
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107 string "=>",
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108 space,
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109 p_con (E.pushCRel env x k) c])
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110
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111 | CName s => box [string "#", string s]
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112
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113 | CRecord (k, xcs) =>
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114 if !debug then
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115 parenIf par (box [string "[",
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116 p_list (fn (x, c) =>
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117 box [p_con env x,
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118 space,
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119 string "=",
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120 space,
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121 p_con env c]) xcs,
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122 string "]::",
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123 p_kind k])
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124 else
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125 parenIf par (box [string "[",
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126 p_list (fn (x, c) =>
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127 box [p_con env x,
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128 space,
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129 string "=",
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130 space,
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131 p_con env c]) xcs,
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132 string "]"])
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133 | CConcat (c1, c2) => parenIf par (box [p_con' true env c1,
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134 space,
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135 string "++",
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136 space,
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137 p_con env c2])
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138 | CFold _ => string "fold"
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139 | CUnit => string "()"
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140
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141 and p_con env = p_con' false env
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142
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143 and p_name env (all as (c, _)) =
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144 case c of
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145 CName s => string s
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146 | _ => p_con env all
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147
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148 fun p_exp' par env (e, _) =
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149 case e of
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150 EPrim p => Prim.p_t p
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151 | ERel n =>
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152 ((if !debug then
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153 string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
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154 else
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155 string (#1 (E.lookupERel env n)))
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156 handle E.UnboundRel _ => string ("UNBOUND_" ^ Int.toString n))
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157 | ENamed n =>
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158 ((if !debug then
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159 string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
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160 else
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161 string (#1 (E.lookupENamed env n)))
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162 handle E.UnboundNamed _ => string ("UNBOUNDN_" ^ Int.toString n))
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163 | EFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]
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164 | EFfiApp (m, x, es) => box [string "FFI(",
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165 string m,
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166 string ".",
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167 string x,
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168 string "(",
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169 p_list (p_exp env) es,
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170 string "))"]
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171 | EApp (e1, e2) => parenIf par (box [p_exp env e1,
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172 space,
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173 p_exp' true env e2])
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174 | EAbs (x, t, _, e) => parenIf par (box [string "fn",
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175 space,
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176 string x,
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177 space,
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178 string ":",
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179 space,
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180 p_con env t,
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181 space,
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182 string "=>",
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183 space,
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184 p_exp (E.pushERel env x t) e])
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185 | ECApp (e, c) => parenIf par (box [p_exp env e,
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186 space,
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187 string "[",
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188 p_con env c,
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189 string "]"])
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190 | ECAbs (x, k, e) => parenIf par (box [string "fn",
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191 space,
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192 string x,
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193 space,
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194 string "::",
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195 space,
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196 p_kind k,
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197 space,
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198 string "=>",
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199 space,
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200 p_exp (E.pushCRel env x k) e])
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201
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202 | ERecord xes => box [string "{",
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203 p_list (fn (x, e, _) =>
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204 box [p_name env x,
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205 space,
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206 string "=",
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207 space,
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208 p_exp env e]) xes,
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209 string "}"]
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210 | EField (e, c, {field, rest}) =>
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211 if !debug then
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212 box [p_exp' true env e,
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213 string ".",
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214 p_con' true env c,
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215 space,
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216 string "[",
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217 p_con env field,
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218 space,
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219 string " in ",
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220 space,
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221 p_con env rest,
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222 string "]"]
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223 else
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224 box [p_exp' true env e,
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225 string ".",
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226 p_con' true env c]
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227 | EFold _ => string "fold"
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228
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229 and p_exp env = p_exp' false env
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230
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231 fun p_decl env ((d, _) : decl) =
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232 case d of
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233 DCon (x, n, k, c) =>
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234 let
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235 val xp = if !debug then
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236 box [string x,
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237 string "__",
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238 string (Int.toString n)]
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239 else
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240 string x
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241 in
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242 box [string "con",
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243 space,
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244 xp,
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245 space,
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246 string "::",
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247 space,
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248 p_kind k,
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249 space,
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250 string "=",
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251 space,
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252 p_con env c]
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253 end
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254 | DVal (x, n, t, e) =>
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255 let
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256 val xp = if !debug then
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257 box [string x,
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258 string "__",
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259 string (Int.toString n)]
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260 else
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261 string x
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262 in
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263 box [string "val",
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264 space,
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265 xp,
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266 space,
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267 string ":",
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268 space,
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269 p_con env t,
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270 space,
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271 string "=",
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272 space,
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273 p_exp env e]
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274 end
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275 | DPage (c, e) => box [string "page",
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276 p_con env c,
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277 space,
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278 string "=",
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279 space,
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280 p_exp env e]
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281
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282 fun p_file env file =
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283 let
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284 val (pds, _) = ListUtil.foldlMap (fn (d, env) =>
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285 (p_decl env d,
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286 E.declBinds env d))
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287 env file
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288 in
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289 p_list_sep newline (fn x => x) pds
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290 end
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291
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292 end
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