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(* 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 Elab = struct
type 'a located = 'a ErrorMsg.located
datatype kind' =
KType
| KArrow of kind * kind
| KName
| KRecord of kind
| KError
| KUnif of ErrorMsg.span * string * kind option ref
withtype kind = kind' located
datatype explicitness =
Explicit
| Implicit
datatype con' =
TFun of con * con
| TCFun of explicitness * string * kind * con
| TRecord of con
| CRel of int
| CNamed of int
| CModProj of int * string list * string
| CApp of con * con
| CAbs of string * kind * con
| CName of string
| CRecord of kind * (con * con) list
| CConcat of con * con
| CFold of kind * kind
| CError
| CUnif of ErrorMsg.span * kind * string * con option ref
withtype con = con' located
datatype exp' =
EPrim of Prim.t
| ERel of int
| ENamed of int
| EModProj of int * string list * string
| EApp of exp * exp
| EAbs of string * con * con * exp
| ECApp of exp * con
| ECAbs of explicitness * string * kind * exp
| ERecord of (con * exp * con) list
| EField of exp * con * { field : con, rest : con }
| EFold of kind
| EError
withtype exp = exp' located
datatype sgn_item' =
SgiConAbs of string * int * kind
| SgiCon of string * int * kind * con
| SgiVal of string * int * con
| SgiStr of string * int * sgn
| SgiSgn of string * int * sgn
and sgn' =
SgnConst of sgn_item list
| SgnVar of int
| SgnFun of string * int * sgn * sgn
| SgnWhere of sgn * string * con
| SgnProj of int * string list * string
| SgnError
withtype sgn_item = sgn_item' located
and sgn = sgn' located
datatype decl' =
DCon of string * int * kind * con
| DVal of string * int * con * exp
| DSgn of string * int * sgn
| DStr of string * int * sgn * str
| DFfiStr of string * int * sgn
and str' =
StrConst of decl list
| StrVar of int
| StrProj of str * string
| StrFun of string * int * sgn * sgn * str
| StrApp of str * str
| StrError
withtype decl = decl' located
and str = str' located
type file = decl list
end
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