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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 flat-code Laconic/Web *)
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29
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30 structure FlatPrint :> FLAT_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 Flat
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36
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37 structure E = FlatEnv
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38
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39 val debug = ref false
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40
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41 val dummyTyp = (TNamed 0, ErrorMsg.dummySpan)
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42
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43 fun p_typ' par env (t, _) =
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44 case t of
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45 TTop => string "?"
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46 | TFun (t1, t2) => parenIf par (box [p_typ' true env t1,
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47 space,
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48 string "->",
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49 space,
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50 p_typ env t2])
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51 | TCode (t1, t2) => parenIf par (box [p_typ' true env t1,
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52 space,
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53 string "-->",
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54 space,
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55 p_typ env t2])
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56 | TRecord xcs => box [string "{",
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57 p_list (fn (x, t) =>
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58 box [string x,
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59 space,
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60 string ":",
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61 space,
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62 p_typ env t]) xcs,
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63 string "}"]
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64 | TNamed n =>
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65 if !debug then
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66 string (#1 (E.lookupTNamed env n) ^ "__" ^ Int.toString n)
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67 else
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68 string (#1 (E.lookupTNamed env n))
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69 | TFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]
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70
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71 and p_typ env = p_typ' false env
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72
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73 fun p_exp' par env (e, _) =
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74 case e of
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75 EPrim p => Prim.p_t p
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76 | ERel n =>
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77 ((if !debug then
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78 string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
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79 else
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80 string (#1 (E.lookupERel env n)))
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81 handle E.UnboundRel _ => string ("UNBOUND" ^ Int.toString n))
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82 | ENamed n =>
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83 if !debug then
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84 string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
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85 else
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86 string (#1 (E.lookupENamed env n))
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87 | EFfi (m, x) => box [string "FFI(", string m, string ".", string x, string ")"]
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88 | EFfiApp (m, x, es) => box [string "FFI(",
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89 string m,
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90 string ".",
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91 string x,
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92 string "(",
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93 p_list (p_exp env) es,
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94 string "))"]
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95 | ECode n => string ("code$" ^ Int.toString n)
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96 | EApp (e1, e2) => parenIf par (box [p_exp env e1,
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97 space,
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98 p_exp' true env e2])
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99
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100 | ERecord xes => box [string "{",
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101 p_list (fn (x, e, _) =>
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102 box [string x,
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103 space,
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104 string "=",
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105 space,
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106 p_exp env e]) xes,
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107 string "}"]
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108 | EField (e, x) =>
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109 box [p_exp' true env e,
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110 string ".",
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111 string x]
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112
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113 | ELet (xes, e) =>
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114 let
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115 val (env, pps) = foldl (fn ((x, _, e), (env, pps)) =>
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116 (E.pushERel env x dummyTyp,
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117 List.revAppend ([space,
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118 string "val",
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119 space,
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120 string x,
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121 space,
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122 string "=",
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123 space,
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124 p_exp env e],
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125 pps)))
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126 (env, []) xes
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127 in
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128 box [string "let",
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129 space,
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130 box (rev pps),
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131 space,
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132 string "in",
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133 space,
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134 p_exp env e,
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135 space,
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136 string "end"]
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137 end
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138
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139 and p_exp env = p_exp' false env
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140
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141 fun p_decl env ((d, _) : decl) =
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142 case d of
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143 DVal (x, n, t, e) =>
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144 let
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145 val xp = if !debug then
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146 box [string x,
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147 string "__",
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148 string (Int.toString n)]
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149 else
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150 string x
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151 in
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152 box [string "val",
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153 space,
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154 xp,
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155 space,
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156 string ":",
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157 space,
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158 p_typ env t,
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159 space,
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160 string "=",
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161 space,
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162 p_exp env e]
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163
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164 end
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165 | DFun (n, x, dom, ran, e) =>
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166 let
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167 val xp = if !debug then
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168 box [string x,
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169 string "__",
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170 string (Int.toString n)]
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171 else
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172 string x
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173 in
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174 box [string "fun",
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175 space,
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176 string "code$",
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177 string (Int.toString n),
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178 space,
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179 string "(",
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180 xp,
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181 space,
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182 string ":",
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183 space,
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184 p_typ env dom,
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185 string ")",
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186 space,
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187 string ":",
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188 space,
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189 p_typ env ran,
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190 space,
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191 string "=",
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192 space,
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193 p_exp (E.pushERel env x dom) e]
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194
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195 end
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196
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197 fun p_file env file =
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198 let
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199 val (pds, _) = ListUtil.foldlMap (fn (d, env) =>
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200 (p_decl env d,
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201 E.declBinds env d))
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202 env file
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203 in
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204 p_list_sep newline (fn x => x) pds
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205 end
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206
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207 end
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