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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 Expl = struct
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29
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30 type 'a located = 'a ErrorMsg.located
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31
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32 datatype kind' =
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33 KType
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34 | KArrow of kind * kind
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35 | KName
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36 | KUnit
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37 | KRecord of kind
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38
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39 withtype kind = kind' located
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40
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41 datatype con' =
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42 TFun of con * con
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43 | TCFun of string * kind * con
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44 | TRecord of con
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45
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46 | CRel of int
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47 | CNamed of int
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48 | CModProj of int * string list * string
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49 | CApp of con * con
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50 | CAbs of string * kind * con
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51
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52 | CName of string
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53
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54 | CRecord of kind * (con * con) list
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55 | CConcat of con * con
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56 | CFold of kind * kind
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57
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58 | CUnit
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59
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60 withtype con = con' located
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61
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62 datatype exp' =
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63 EPrim of Prim.t
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64 | ERel of int
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65 | ENamed of int
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66 | EModProj of int * string list * string
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67 | EApp of exp * exp
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68 | EAbs of string * con * con * exp
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69 | ECApp of exp * con
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70 | ECAbs of string * kind * exp
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71
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72 | ERecord of (con * exp * con) list
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73 | EField of exp * con * { field : con, rest : con }
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74 | EFold of kind
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75
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76 | EWrite of exp
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77
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78 withtype exp = exp' located
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79
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80 datatype sgn_item' =
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81 SgiConAbs of string * int * kind
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82 | SgiCon of string * int * kind * con
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83 | SgiVal of string * int * con
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84 | SgiSgn of string * int * sgn
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85 | SgiStr of string * int * sgn
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86
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87 and sgn' =
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88 SgnConst of sgn_item list
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89 | SgnVar of int
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90 | SgnFun of string * int * sgn * sgn
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91 | SgnWhere of sgn * string * con
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92 | SgnProj of int * string list * string
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93
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94 withtype sgn_item = sgn_item' located
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95 and sgn = sgn' located
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96
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97 datatype decl' =
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98 DCon of string * int * kind * con
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99 | DVal of string * int * con * exp
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100 | DSgn of string * int * sgn
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101 | DStr of string * int * sgn * str
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102 | DFfiStr of string * int * sgn
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103 | DExport of int * sgn * str
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104
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105 and str' =
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106 StrConst of decl list
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107 | StrVar of int
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108 | StrProj of str * string
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109 | StrFun of string * int * sgn * sgn * str
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110 | StrApp of str * str
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111
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112 withtype decl = decl' located
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113 and str = str' located
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114
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115 type file = decl list
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116
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117 end
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