adamc@2: (* Copyright (c) 2008, Adam Chlipala
adamc@2:  * All rights reserved.
adamc@2:  *
adamc@2:  * Redistribution and use in source and binary forms, with or without
adamc@2:  * modification, are permitted provided that the following conditions are met:
adamc@2:  *
adamc@2:  * - Redistributions of source code must retain the above copyright notice,
adamc@2:  *   this list of conditions and the following disclaimer.
adamc@2:  * - Redistributions in binary form must reproduce the above copyright notice,
adamc@2:  *   this list of conditions and the following disclaimer in the documentation
adamc@2:  *   and/or other materials provided with the distribution.
adamc@2:  * - The names of contributors may not be used to endorse or promote products
adamc@2:  *   derived from this software without specific prior written permission.
adamc@2:  *
adamc@2:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@2:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@2:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@2:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@2:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
adamc@2:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@2:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@2:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@2:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@2:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@2:  * POSSIBILITY OF SUCH DAMAGE.
adamc@2:  *)
adamc@2: 
adamc@2: structure Elab = struct
adamc@2: 
adamc@2: type 'a located = 'a ErrorMsg.located
adamc@2: 
adamc@2: datatype kind' =
adamc@2:          KType
adamc@2:        | KArrow of kind * kind
adamc@2:        | KName
adamc@2:        | KRecord of kind
adamc@2: 
adamc@2:        | KError
adamc@2:        | KUnif of string * kind option ref
adamc@2: 
adamc@2: withtype kind = kind' located
adamc@2: 
adamc@2: datatype explicitness =
adamc@2:          Explicit
adamc@2:        | Implicit
adamc@2: 
adamc@2: datatype con' =
adamc@2:          TFun of con * con
adamc@2:        | TCFun of explicitness * string * kind * con
adamc@2:        | TRecord of con
adamc@2: 
adamc@2:        | CRel of int
adamc@2:        | CNamed of int
adamc@2:        | CApp of con * con
adamc@2:        | CAbs of explicitness * string * kind * con
adamc@2: 
adamc@2:        | CName of string
adamc@2: 
adamc@2:        | CRecord of kind * (con * con) list
adamc@2:        | CConcat of con * con
adamc@2: 
adamc@2:        | CError
adamc@2:        | CUnif of string * con option ref
adamc@2: 
adamc@2: withtype con = con' located
adamc@2: 
adamc@2: datatype decl' =
adamc@2:          DCon of string * kind * con
adamc@2: 
adamc@2: withtype decl = decl' located
adamc@2: 
adamc@2: type file = decl list
adamc@2: 
adamc@2: end