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Basic handling of recursive functions in Iflow
author Adam Chlipala <adamc@hcoop.net>
date Sat, 01 May 2010 09:51:46 -0400
parents c316ca3c9ec6
children b4480a56cab7
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
adamc@2 42
adamc@623 43 | KRel of int
adamc@623 44 | KFun of string * kind
adamc@623 45
adamc@2 46 withtype kind = kind' located
adamc@2 47
adamc@2 48 datatype explicitness =
adamc@2 49 Explicit
adamc@2 50 | Implicit
adamc@2 51
adamc@2 52 datatype con' =
adamc@2 53 TFun of con * con
adamc@2 54 | TCFun of explicitness * string * kind * con
adamc@2 55 | TRecord of con
adamc@628 56 | TDisjoint of con * con * con
adamc@2 57
adamc@2 58 | CRel of int
adamc@2 59 | CNamed of int
adamc@34 60 | CModProj of int * string list * string
adamc@2 61 | CApp of con * con
adamc@8 62 | CAbs of string * kind * con
adamc@2 63
adamc@623 64 | CKAbs of string * con
adamc@623 65 | CKApp of con * kind
adamc@623 66 | TKFun of string * con
adamc@623 67
adamc@2 68 | CName of string
adamc@2 69
adamc@2 70 | CRecord of kind * (con * con) list
adamc@2 71 | CConcat of con * con
adamc@621 72 | CMap of kind * kind
adamc@2 73
adamc@82 74 | CUnit
adamc@82 75
adamc@207 76 | CTuple of con list
adamc@207 77 | CProj of con * int
adamc@207 78
adamc@2 79 | CError
adamc@76 80 | CUnif of ErrorMsg.span * kind * string * con option ref
adamc@2 81
adamc@2 82 withtype con = con' located
adamc@2 83
adamc@731 84 datatype datatype_kind = datatype DatatypeKind.datatype_kind
adamc@188 85
adamc@171 86 datatype patCon =
adamc@171 87 PConVar of int
adamc@171 88 | PConProj of int * string list * string
adamc@171 89
adamc@171 90 datatype pat' =
adamc@171 91 PWild
adamc@182 92 | PVar of string * con
adamc@173 93 | PPrim of Prim.t
adamc@191 94 | PCon of datatype_kind * patCon * con list * pat option
adamc@182 95 | PRecord of (string * pat * con) list
adamc@171 96
adamc@171 97 withtype pat = pat' located
adamc@171 98
adamc@9 99 datatype exp' =
adamc@14 100 EPrim of Prim.t
adamc@14 101 | ERel of int
adamc@9 102 | ENamed of int
adamc@34 103 | EModProj of int * string list * string
adamc@9 104 | EApp of exp * exp
adamc@26 105 | EAbs of string * con * con * exp
adamc@9 106 | ECApp of exp * con
adamc@9 107 | ECAbs of explicitness * string * kind * exp
adamc@9 108
adamc@623 109 | EKAbs of string * exp
adamc@623 110 | EKApp of exp * kind
adamc@623 111
adamc@29 112 | ERecord of (con * exp * con) list
adamc@12 113 | EField of exp * con * { field : con, rest : con }
adamc@445 114 | EConcat of exp * con * exp * con
adamc@149 115 | ECut of exp * con * { field : con, rest : con }
adamc@493 116 | ECutMulti of exp * con * { rest : con }
adamc@12 117
adamc@182 118 | ECase of exp * (pat * exp) list * { disc : con, result : con }
adamc@171 119
adamc@9 120 | EError
adamc@228 121 | EUnif of exp option ref
adamc@9 122
adamc@825 123 | ELet of edecl list * exp * con
adamc@447 124
adamc@447 125 and edecl' =
adamc@825 126 EDVal of pat * con * exp
adamc@447 127 | EDValRec of (string * con * exp) list
adamc@447 128
adamc@9 129 withtype exp = exp' located
adamc@447 130 and edecl = edecl' located
adamc@9 131
adamc@31 132 datatype sgn_item' =
adamc@31 133 SgiConAbs of string * int * kind
adamc@31 134 | SgiCon of string * int * kind * con
adamc@805 135 | SgiDatatype of (string * int * string list * (string * int * con option) list) list
adamc@191 136 | SgiDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@31 137 | SgiVal of string * int * con
adamc@31 138 | SgiStr of string * int * sgn
adamc@59 139 | SgiSgn of string * int * sgn
adamc@88 140 | SgiConstraint of con * con
adamc@563 141 | SgiClassAbs of string * int * kind
adamc@563 142 | SgiClass of string * int * kind * con
adamc@31 143
adamc@31 144 and sgn' =
adamc@31 145 SgnConst of sgn_item list
adamc@31 146 | SgnVar of int
adamc@41 147 | SgnFun of string * int * sgn * sgn
adamc@42 148 | SgnWhere of sgn * string * con
adamc@59 149 | SgnProj of int * string list * string
adamc@31 150 | SgnError
adamc@31 151
adamc@31 152 withtype sgn_item = sgn_item' located
adamc@31 153 and sgn = sgn' located
adamc@31 154
adamc@2 155 datatype decl' =
adamc@5 156 DCon of string * int * kind * con
adamc@805 157 | DDatatype of (string * int * string list * (string * int * con option) list) list
adamc@191 158 | DDatatypeImp of string * int * int * string list * string * string list * (string * int * con option) list
adamc@9 159 | DVal of string * int * con * exp
adamc@123 160 | DValRec of (string * int * con * exp) list
adamc@31 161 | DSgn of string * int * sgn
adamc@31 162 | DStr of string * int * sgn * str
adamc@48 163 | DFfiStr of string * int * sgn
adamc@88 164 | DConstraint of con * con
adamc@109 165 | DExport of int * sgn * str
adamc@707 166 | DTable of int * string * int * con * exp * con * exp * con
adamc@338 167 | DSequence of int * string * int
adamc@754 168 | DView of int * string * int * exp * con
adamc@563 169 | DClass of string * int * kind * con
adamc@271 170 | DDatabase of string
adamc@459 171 | DCookie of int * string * int * con
adamc@720 172 | DStyle of int * string * int
adamc@1075 173 | DTask of exp * exp
adamc@1199 174 | DPolicy of exp
adamc@31 175
adamc@31 176 and str' =
adamc@31 177 StrConst of decl list
adamc@31 178 | StrVar of int
adamc@34 179 | StrProj of str * string
adamc@41 180 | StrFun of string * int * sgn * sgn * str
adamc@44 181 | StrApp of str * str
adamc@31 182 | StrError
adamc@2 183
adamc@2 184 withtype decl = decl' located
adamc@31 185 and str = str' located
adamc@31 186
adamc@2 187 type file = decl list
adamc@2 188
adamc@2 189 end