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Hopeful fix for the Great Unification Bug
author Adam Chlipala <adam@chlipala.net>
date Sun, 10 Oct 2010 14:41:03 -0400
parents d008c4c43a0a
children 5337adf33a4a
rev   line source
adamc@2 1 (* Copyright (c) 2008, Adam Chlipala
adamc@2 2 * All rights reserved.
adamc@2 3 *
adamc@2 4 * Redistribution and use in source and binary forms, with or without
adamc@2 5 * modification, are permitted provided that the following conditions are met:
adamc@2 6 *
adamc@2 7 * - Redistributions of source code must retain the above copyright notice,
adamc@2 8 * this list of conditions and the following disclaimer.
adamc@2 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@2 10 * this list of conditions and the following disclaimer in the documentation
adamc@2 11 * and/or other materials provided with the distribution.
adamc@2 12 * - The names of contributors may not be used to endorse or promote products
adamc@2 13 * derived from this software without specific prior written permission.
adamc@2 14 *
adamc@2 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@2 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@2 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@2 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@2 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@2 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@2 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@2 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@2 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@2 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@2 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@2 26 *)
adamc@2 27
adamc@2 28 structure Elab = struct
adamc@2 29
adamc@2 30 type 'a located = 'a ErrorMsg.located
adamc@2 31
adamc@2 32 datatype kind' =
adamc@2 33 KType
adamc@2 34 | KArrow of kind * kind
adamc@2 35 | KName
adamc@2 36 | KRecord of kind
adamc@82 37 | KUnit
adamc@207 38 | KTuple of kind list
adamc@2 39
adamc@2 40 | KError
adamc@76 41 | KUnif of ErrorMsg.span * string * kind option ref
adam@1302 42 | KTupleUnif of ErrorMsg.span * (int * kind) list * kind option ref
adamc@2 43
adamc@623 44 | KRel of int
adamc@623 45 | KFun of string * kind
adamc@623 46
adamc@2 47 withtype kind = kind' located
adamc@2 48
adamc@2 49 datatype explicitness =
adamc@2 50 Explicit
adamc@2 51 | Implicit
adamc@2 52
adamc@2 53 datatype con' =
adamc@2 54 TFun of con * con
adamc@2 55 | TCFun of explicitness * string * kind * con
adamc@2 56 | TRecord of con
adamc@628 57 | TDisjoint of con * con * con
adamc@2 58
adamc@2 59 | CRel of int
adamc@2 60 | CNamed of int
adamc@34 61 | CModProj of int * string list * string
adamc@2 62 | CApp of con * con
adamc@8 63 | CAbs of string * kind * con
adamc@2 64
adamc@623 65 | CKAbs of string * con
adamc@623 66 | CKApp of con * kind
adamc@623 67 | TKFun of string * con
adamc@623 68
adamc@2 69 | CName of string
adamc@2 70
adamc@2 71 | CRecord of kind * (con * con) list
adamc@2 72 | CConcat of con * con
adamc@621 73 | CMap of kind * kind
adamc@2 74
adamc@82 75 | CUnit
adamc@82 76
adamc@207 77 | CTuple of con list
adamc@207 78 | CProj of con * int
adamc@207 79
adamc@2 80 | CError
adam@1303 81 | CUnif of int * ErrorMsg.span * kind * string * con option ref
adamc@2 82
adamc@2 83 withtype con = con' located
adamc@2 84
adamc@731 85 datatype datatype_kind = datatype DatatypeKind.datatype_kind
adamc@188 86
adamc@171 87 datatype patCon =
adamc@171 88 PConVar of int
adamc@171 89 | PConProj of int * string list * string
adamc@171 90
adamc@171 91 datatype pat' =
adamc@171 92 PWild
adamc@182 93 | PVar of string * con
adamc@173 94 | PPrim of Prim.t
adamc@191 95 | PCon of datatype_kind * patCon * con list * pat option
adamc@182 96 | PRecord of (string * pat * con) list
adamc@171 97
adamc@171 98 withtype pat = pat' located
adamc@171 99
adamc@9 100 datatype exp' =
adamc@14 101 EPrim of Prim.t
adamc@14 102 | ERel of int
adamc@9 103 | ENamed of int
adamc@34 104 | EModProj of int * string list * string
adamc@9 105 | EApp of exp * exp
adamc@26 106 | EAbs of string * con * con * exp
adamc@9 107 | ECApp of exp * con
adamc@9 108 | ECAbs of explicitness * string * kind * exp
adamc@9 109
adamc@623 110 | EKAbs of string * exp
adamc@623 111 | EKApp of exp * kind
adamc@623 112
adamc@29 113 | ERecord of (con * exp * con) list
adamc@12 114 | EField of exp * con * { field : con, rest : con }
adamc@445 115 | EConcat of exp * con * exp * con
adamc@149 116 | ECut of exp * con * { field : con, rest : con }
adamc@493 117 | ECutMulti of exp * con * { rest : con }
adamc@12 118
adamc@182 119 | ECase of exp * (pat * exp) list * { disc : con, result : con }
adamc@171 120
adamc@9 121 | EError
adamc@228 122 | EUnif of exp option ref
adamc@9 123
adamc@825 124 | ELet of edecl list * exp * con
adamc@447 125
adamc@447 126 and edecl' =
adamc@825 127 EDVal of pat * con * exp
adamc@447 128 | EDValRec of (string * con * exp) list
adamc@447 129
adamc@9 130 withtype exp = exp' located
adamc@447 131 and edecl = edecl' located
adamc@9 132
adamc@31 133 datatype sgn_item' =
adamc@31 134 SgiConAbs of string * int * kind
adamc@31 135 | SgiCon of string * int * kind * con
adamc@805 136 | SgiDatatype of (string * int * string list * (string * int * con option) list) list
adamc@191 137 | SgiDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@31 138 | SgiVal of string * int * con
adamc@31 139 | SgiStr of string * int * sgn
adamc@59 140 | SgiSgn of string * int * sgn
adamc@88 141 | SgiConstraint of con * con
adamc@563 142 | SgiClassAbs of string * int * kind
adamc@563 143 | SgiClass of string * int * kind * con
adamc@31 144
adamc@31 145 and sgn' =
adamc@31 146 SgnConst of sgn_item list
adamc@31 147 | SgnVar of int
adamc@41 148 | SgnFun of string * int * sgn * sgn
adamc@42 149 | SgnWhere of sgn * string * con
adamc@59 150 | SgnProj of int * string list * string
adamc@31 151 | SgnError
adamc@31 152
adamc@31 153 withtype sgn_item = sgn_item' located
adamc@31 154 and sgn = sgn' located
adamc@31 155
adamc@2 156 datatype decl' =
adamc@5 157 DCon of string * int * kind * con
adamc@805 158 | DDatatype of (string * int * string list * (string * int * con option) list) list
adamc@191 159 | DDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@9 160 | DVal of string * int * con * exp
adamc@123 161 | DValRec of (string * int * con * exp) list
adamc@31 162 | DSgn of string * int * sgn
adamc@31 163 | DStr of string * int * sgn * str
adamc@48 164 | DFfiStr of string * int * sgn
adamc@88 165 | DConstraint of con * con
adamc@109 166 | DExport of int * sgn * str
adamc@707 167 | DTable of int * string * int * con * exp * con * exp * con
adamc@338 168 | DSequence of int * string * int
adamc@754 169 | DView of int * string * int * exp * con
adamc@563 170 | DClass of string * int * kind * con
adamc@271 171 | DDatabase of string
adamc@459 172 | DCookie of int * string * int * con
adamc@720 173 | DStyle of int * string * int
adamc@1075 174 | DTask of exp * exp
adamc@1199 175 | DPolicy of exp
adam@1294 176 | DOnError of int * string list * string
adamc@31 177
adamc@31 178 and str' =
adamc@31 179 StrConst of decl list
adamc@31 180 | StrVar of int
adamc@34 181 | StrProj of str * string
adamc@41 182 | StrFun of string * int * sgn * sgn * str
adamc@44 183 | StrApp of str * str
adamc@31 184 | StrError
adamc@2 185
adamc@2 186 withtype decl = decl' located
adamc@31 187 and str = str' located
adamc@31 188
adamc@2 189 type file = decl list
adamc@2 190
adamc@2 191 end