(* Copyright (c) 2008, Adam Chlipala
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - The names of contributors may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

structure Flat = struct

type 'a located = 'a ErrorMsg.located

datatype typ' =
         TTop
       | TFun of typ * typ
       | TCode of typ * typ
       | TRecord of (string * typ) list
       | TNamed of int
       | TFfi of string * string

withtype typ = typ' located

datatype exp' =
         EPrim of Prim.t
       | ERel of int
       | ENamed of int
       | EFfi of string * string
       | EFfiApp of string * string * exp list
       | ECode of int
       | EApp of exp * exp

       | ERecord of (string * exp * typ) list
       | EField of exp * string

       | ELet of (string * typ * exp) list * exp

       | EStrcat of exp * exp

       | EWrite of exp
       | ESeq of exp * exp

withtype exp = exp' located

datatype decl' =
         DVal of string * int * typ * exp
       | DFun of int * string * typ * typ * exp
       | DPage of (string * typ) list * exp

withtype decl = decl' located

type file = decl list

end