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'Option' datatype encoding
author Adam Chlipala <adamc@hcoop.net>
date Sat, 09 Aug 2008 19:23:31 -0400
parents aa54250f58ac
children dd82457fda82
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@2 38
adamc@2 39 | KError
adamc@76 40 | KUnif of ErrorMsg.span * string * kind option ref
adamc@2 41
adamc@2 42 withtype kind = kind' located
adamc@2 43
adamc@2 44 datatype explicitness =
adamc@2 45 Explicit
adamc@2 46 | Implicit
adamc@2 47
adamc@2 48 datatype con' =
adamc@2 49 TFun of con * con
adamc@2 50 | TCFun of explicitness * string * kind * con
adamc@85 51 | TDisjoint of con * con * con
adamc@2 52 | TRecord of con
adamc@2 53
adamc@2 54 | CRel of int
adamc@2 55 | CNamed of int
adamc@34 56 | CModProj of int * string list * string
adamc@2 57 | CApp of con * con
adamc@8 58 | CAbs of string * kind * con
adamc@84 59 | CDisjoint of con * con * con
adamc@2 60
adamc@2 61 | CName of string
adamc@2 62
adamc@2 63 | CRecord of kind * (con * con) list
adamc@2 64 | CConcat of con * con
adamc@67 65 | CFold of kind * kind
adamc@2 66
adamc@82 67 | CUnit
adamc@82 68
adamc@2 69 | CError
adamc@76 70 | CUnif of ErrorMsg.span * kind * string * con option ref
adamc@2 71
adamc@2 72 withtype con = con' located
adamc@2 73
adamc@188 74 datatype datatype_kind =
adamc@188 75 Enum
adamc@198 76 | Option
adamc@188 77 | Default
adamc@188 78
adamc@171 79 datatype patCon =
adamc@171 80 PConVar of int
adamc@171 81 | PConProj of int * string list * string
adamc@171 82
adamc@171 83 datatype pat' =
adamc@171 84 PWild
adamc@182 85 | PVar of string * con
adamc@173 86 | PPrim of Prim.t
adamc@191 87 | PCon of datatype_kind * patCon * con list * pat option
adamc@182 88 | PRecord of (string * pat * con) list
adamc@171 89
adamc@171 90 withtype pat = pat' located
adamc@171 91
adamc@9 92 datatype exp' =
adamc@14 93 EPrim of Prim.t
adamc@14 94 | ERel of int
adamc@9 95 | ENamed of int
adamc@34 96 | EModProj of int * string list * string
adamc@9 97 | EApp of exp * exp
adamc@26 98 | EAbs of string * con * con * exp
adamc@9 99 | ECApp of exp * con
adamc@9 100 | ECAbs of explicitness * string * kind * exp
adamc@9 101
adamc@29 102 | ERecord of (con * exp * con) list
adamc@12 103 | EField of exp * con * { field : con, rest : con }
adamc@149 104 | ECut of exp * con * { field : con, rest : con }
adamc@71 105 | EFold of kind
adamc@12 106
adamc@182 107 | ECase of exp * (pat * exp) list * { disc : con, result : con }
adamc@171 108
adamc@9 109 | EError
adamc@9 110
adamc@9 111 withtype exp = exp' located
adamc@9 112
adamc@31 113 datatype sgn_item' =
adamc@31 114 SgiConAbs of string * int * kind
adamc@31 115 | SgiCon of string * int * kind * con
adamc@191 116 | SgiDatatype of string * int * string list * (string * int * con option) list
adamc@191 117 | SgiDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@31 118 | SgiVal of string * int * con
adamc@31 119 | SgiStr of string * int * sgn
adamc@59 120 | SgiSgn of string * int * sgn
adamc@88 121 | SgiConstraint of con * con
adamc@31 122
adamc@31 123 and sgn' =
adamc@31 124 SgnConst of sgn_item list
adamc@31 125 | SgnVar of int
adamc@41 126 | SgnFun of string * int * sgn * sgn
adamc@42 127 | SgnWhere of sgn * string * con
adamc@59 128 | SgnProj of int * string list * string
adamc@31 129 | SgnError
adamc@31 130
adamc@31 131 withtype sgn_item = sgn_item' located
adamc@31 132 and sgn = sgn' located
adamc@31 133
adamc@2 134 datatype decl' =
adamc@5 135 DCon of string * int * kind * con
adamc@191 136 | DDatatype of string * int * string list * (string * int * con option) list
adamc@191 137 | DDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@9 138 | DVal of string * int * con * exp
adamc@123 139 | DValRec of (string * int * con * exp) list
adamc@31 140 | DSgn of string * int * sgn
adamc@31 141 | DStr of string * int * sgn * str
adamc@48 142 | DFfiStr of string * int * sgn
adamc@88 143 | DConstraint of con * con
adamc@109 144 | DExport of int * sgn * str
adamc@31 145
adamc@31 146 and str' =
adamc@31 147 StrConst of decl list
adamc@31 148 | StrVar of int
adamc@34 149 | StrProj of str * string
adamc@41 150 | StrFun of string * int * sgn * sgn * str
adamc@44 151 | StrApp of str * str
adamc@31 152 | StrError
adamc@2 153
adamc@2 154 withtype decl = decl' located
adamc@31 155 and str = str' located
adamc@31 156
adamc@2 157 type file = decl list
adamc@2 158
adamc@2 159 end