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"
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adamc@38:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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adamc@38:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
adamc@38:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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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 Explify :> EXPLIFY = struct
adamc@38: 
adamc@38: structure EM = ErrorMsg
adamc@38: structure L = Elab
adamc@38: structure L' = Expl
adamc@38: 
adamc@38: fun explifyKind (k, loc) =
adamc@38:     case k of
adamc@38:         L.KType => (L'.KType, loc)
adamc@38:       | L.KArrow (k1, k2) => (L'.KArrow (explifyKind k1, explifyKind k2), loc)
adamc@38:       | L.KName => (L'.KName, loc)
adamc@38:       | L.KRecord k => (L'.KRecord (explifyKind k), loc)
adamc@38: 
adamc@38:       | L.KError => raise Fail ("explifyKind: KError at " ^ EM.spanToString loc)
adamc@38:       | L.KUnif (_, ref (SOME k)) => explifyKind k
adamc@38:       | L.KUnif _ => raise Fail ("explifyKind: KUnif at " ^ EM.spanToString loc)
adamc@38: 
adamc@38: fun explifyCon (c, loc) =
adamc@38:     case c of
adamc@38:         L.TFun (t1, t2) => (L'.TFun (explifyCon t1, explifyCon t2), loc)
adamc@38:       | L.TCFun (_, x, k, t) => (L'.TCFun (x, explifyKind k, explifyCon t), loc)
adamc@38:       | L.TRecord c => (L'.TRecord (explifyCon c), loc)
adamc@38: 
adamc@38:       | L.CRel n => (L'.CRel n, loc)
adamc@38:       | L.CNamed n => (L'.CNamed n, loc)
adamc@38:       | L.CModProj (m, ms, x) => (L'.CModProj (m, ms, x), loc)
adamc@38: 
adamc@38:       | L.CApp (c1, c2) => (L'.CApp (explifyCon c1, explifyCon c2), loc)
adamc@38:       | L.CAbs (x, k, c) => (L'.CAbs (x, explifyKind k, explifyCon c), loc)
adamc@38: 
adamc@38:       | L.CName s => (L'.CName s, loc)
adamc@38: 
adamc@38:       | L.CRecord (k, xcs) => (L'.CRecord (explifyKind k, map (fn (c1, c2) => (explifyCon c1, explifyCon c2)) xcs), loc)
adamc@38:       | L.CConcat (c1, c2) => (L'.CConcat (explifyCon c1, explifyCon c2), loc)
adamc@38: 
adamc@38:       | L.CError => raise Fail ("explifyCon: CError at " ^ EM.spanToString loc)
adamc@38:       | L.CUnif (_, _, ref (SOME c)) => explifyCon c
adamc@38:       | L.CUnif _ => raise Fail ("explifyCon: CUnif at " ^ EM.spanToString loc)
adamc@38: 
adamc@38: fun explifyExp (e, loc) =
adamc@38:     case e of
adamc@38:         L.EPrim p => (L'.EPrim p, loc)
adamc@38:       | L.ERel n => (L'.ERel n, loc)
adamc@38:       | L.ENamed n => (L'.ENamed n, loc)
adamc@38:       | L.EModProj (m, ms, x) => (L'.EModProj (m, ms, x), loc)
adamc@38:       | L.EApp (e1, e2) => (L'.EApp (explifyExp e1, explifyExp e2), loc)
adamc@38:       | L.EAbs (x, dom, ran, e1) => (L'.EAbs (x, explifyCon dom, explifyCon ran, explifyExp e1), loc)
adamc@38:       | L.ECApp (e1, c) => (L'.ECApp (explifyExp e1, explifyCon c), loc)
adamc@38:       | L.ECAbs (_, x, k, e1) => (L'.ECAbs (x, explifyKind k, explifyExp e1), loc)
adamc@38: 
adamc@38:       | L.ERecord xes => (L'.ERecord (map (fn (c, e, t) => (explifyCon c, explifyExp e, explifyCon t)) xes), loc)
adamc@38:       | L.EField (e1, c, {field, rest}) => (L'.EField (explifyExp e1, explifyCon c,
adamc@38:                                                        {field = explifyCon field, rest = explifyCon rest}), loc)
adamc@38: 
adamc@38:       | L.EError => raise Fail ("explifyExp: EError at " ^ EM.spanToString loc)
adamc@38: 
adamc@38: fun explifySgi (sgi, loc) =
adamc@38:     case sgi of
adamc@38:         L.SgiConAbs (x, n, k) => (L'.SgiConAbs (x, n, explifyKind k), loc)
adamc@38:       | L.SgiCon (x, n, k, c) => (L'.SgiCon (x, n, explifyKind k, explifyCon c), loc)
adamc@38:       | L.SgiVal (x, n, c) => (L'.SgiVal (x, n, explifyCon c), loc)
adamc@38:       | L.SgiStr (x, n, sgn) => (L'.SgiStr (x, n, explifySgn sgn), loc)
adamc@38: 
adamc@38: and explifySgn (sgn, loc) =
adamc@38:     case sgn of
adamc@38:         L.SgnConst sgis => (L'.SgnConst (map explifySgi sgis), loc)
adamc@38:       | L.SgnVar n => (L'.SgnVar n, loc)
adamc@38:       | L.SgnError => raise Fail ("explifySgn: SgnError at " ^ EM.spanToString loc)
adamc@38: 
adamc@38: fun explifyDecl (d, loc : EM.span) =
adamc@38:     case d of
adamc@38:         L.DCon (x, n, k, c) => (L'.DCon (x, n, explifyKind k, explifyCon c), loc)
adamc@38:       | L.DVal (x, n, t, e) => (L'.DVal (x, n, explifyCon t, explifyExp e), loc)
adamc@38: 
adamc@38:       | L.DSgn (x, n, sgn) => (L'.DSgn (x, n, explifySgn sgn), loc)
adamc@38:       | L.DStr (x, n, sgn, str) => (L'.DStr (x, n, explifySgn sgn, explifyStr str), loc)
adamc@38: 
adamc@38: and explifyStr (str, loc) =
adamc@38:     case str of
adamc@38:         L.StrConst ds => (L'.StrConst (map explifyDecl ds), loc)
adamc@38:       | L.StrVar n => (L'.StrVar n, loc)
adamc@38:       | L.StrProj (str, s) => (L'.StrProj (explifyStr str, s), loc)
adamc@38:       | L.StrError => raise Fail ("explifyStr: StrError at " ^ EM.spanToString loc)
adamc@38: 
adamc@38: val explify = map explifyDecl
adamc@38: 
adamc@38: end