adamc@38: (* Copyright (c) 2008, Adam Chlipala
adamc@38:  * All rights reserved.
adamc@38:  *
adamc@38:  * Redistribution and use in source and binary forms, with or without
adamc@38:  * modification, are permitted provided that the following conditions are met:
adamc@38:  *
adamc@38:  * - Redistributions of source code must retain the above copyright notice,
adamc@38:  *   this list of conditions and the following disclaimer.
adamc@38:  * - Redistributions in binary form must reproduce the above copyright notice,
adamc@38:  *   this list of conditions and the following disclaimer in the documentation
adamc@38:  *   and/or other materials provided with the distribution.
adamc@38:  * - The names of contributors may not be used to endorse or promote products
adamc@38:  *   derived from this software without specific prior written permission.
adamc@38:  *
adamc@38:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@38:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@38:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@38:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@38:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
adamc@38:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@38:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@38:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@38:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@38:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@38:  * POSSIBILITY OF SUCH DAMAGE.
adamc@38:  *)
adamc@38: 
adamc@38: structure Expl = struct
adamc@38: 
adamc@38: type 'a located = 'a ErrorMsg.located
adamc@38: 
adamc@38: datatype kind' =
adamc@38:          KType
adamc@38:        | KArrow of kind * kind
adamc@38:        | KName
adamc@87:        | KUnit
adamc@38:        | KRecord of kind
adamc@38: 
adamc@38: withtype kind = kind' located
adamc@38: 
adamc@38: datatype con' =
adamc@38:          TFun of con * con
adamc@38:        | TCFun of string * kind * con
adamc@38:        | TRecord of con
adamc@38: 
adamc@38:        | CRel of int
adamc@38:        | CNamed of int
adamc@38:        | CModProj of int * string list * string
adamc@38:        | CApp of con * con
adamc@38:        | CAbs of string * kind * con
adamc@38: 
adamc@38:        | CName of string
adamc@38: 
adamc@38:        | CRecord of kind * (con * con) list
adamc@38:        | CConcat of con * con
adamc@68:        | CFold of kind * kind
adamc@38: 
adamc@87:        | CUnit
adamc@87: 
adamc@38: withtype con = con' located
adamc@38: 
adamc@38: datatype exp' =
adamc@38:          EPrim of Prim.t
adamc@38:        | ERel of int
adamc@38:        | ENamed of int
adamc@38:        | EModProj of int * string list * string
adamc@38:        | EApp of exp * exp
adamc@38:        | EAbs of string * con * con * exp
adamc@38:        | ECApp of exp * con
adamc@38:        | ECAbs of string * kind * exp
adamc@38: 
adamc@38:        | ERecord of (con * exp * con) list
adamc@38:        | EField of exp * con * { field : con, rest : con }
adamc@72:        | EFold of kind
adamc@38: 
adamc@38: withtype exp = exp' located
adamc@38: 
adamc@38: datatype sgn_item' =
adamc@38:          SgiConAbs of string * int * kind
adamc@38:        | SgiCon of string * int * kind * con
adamc@38:        | SgiVal of string * int * con
adamc@64:        | SgiSgn of string * int * sgn
adamc@38:        | SgiStr of string * int * sgn
adamc@38: 
adamc@38: and sgn' =
adamc@38:     SgnConst of sgn_item list
adamc@38:   | SgnVar of int
adamc@45:   | SgnFun of string * int * sgn * sgn
adamc@45:   | SgnWhere of sgn * string * con
adamc@64:   | SgnProj of int * string list * string
adamc@38: 
adamc@38: withtype sgn_item = sgn_item' located
adamc@38: and sgn = sgn' located
adamc@38: 
adamc@38: datatype decl' =
adamc@38:          DCon of string * int * kind * con
adamc@38:        | DVal of string * int * con * exp
adamc@38:        | DSgn of string * int * sgn
adamc@38:        | DStr of string * int * sgn * str
adamc@48:        | DFfiStr of string * int * sgn
adamc@38: 
adamc@38:      and str' =
adamc@38:          StrConst of decl list
adamc@38:        | StrVar of int
adamc@38:        | StrProj of str * string
adamc@45:        | StrFun of string * int * sgn * sgn * str
adamc@45:        | StrApp of str * str
adamc@38: 
adamc@38: withtype decl = decl' located
adamc@38:      and str = str' located
adamc@38: 
adamc@38: type file = decl list
adamc@38: 
adamc@38: end