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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.
*)
(* Simplify a Core program algebraically, without unfolding definitions *)
structure ReduceLocal :> REDUCE_LOCAL = struct
open Core
structure E = CoreEnv
structure U = CoreUtil
val subExpInExp = E.subExpInExp
fun default x = x
fun exp (e : exp') =
let
(*val () = Print.prefaces "exp" [("e", CorePrint.p_exp env (e, ErrorMsg.dummySpan))]*)
val r = case e of
EApp ((EAbs (x, t, _, e1), loc), e2) =>
((*Print.prefaces "Substitute" [("x", Print.PD.string x),
("t", CorePrint.p_con CoreEnv.empty t)];*)
#1 (reduceExp (subExpInExp (0, e2) e1)))
| EField ((ERecord xes, _), (CName x, _), _) =>
(case List.find (fn ((CName x', _), _, _) => x' = x
| _ => false) xes of
SOME (_, (e, _), _) => e
| NONE => e)
| _ => e
in
(*Print.prefaces "exp'" [("e", CorePrint.p_exp env (e, ErrorMsg.dummySpan)),
("r", CorePrint.p_exp env (r, ErrorMsg.dummySpan))];*)
r
end
and reduceExp e = U.Exp.map {kind = default, con = default, exp = exp} e
val reduce = U.File.map {kind = default, con = default, exp = exp, decl = default}
end
|
