(* 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 Monoize :> MONOIZE = struct structure E = ErrorMsg structure Env = CoreEnv structure L = Core structure L' = Mono val dummyTyp = (L'.TNamed 0, E.dummySpan) fun monoName env (all as (c, loc)) = let fun poly () = (E.errorAt loc "Unsupported name constructor"; Print.eprefaces' [("Constructor", CorePrint.p_con env all)]; "") in case c of L.CName s => s | _ => poly () end fun monoType env (all as (c, loc)) = let fun poly () = (E.errorAt loc "Unsupported type constructor"; Print.eprefaces' [("Constructor", CorePrint.p_con env all)]; dummyTyp) in case c of L.TFun (c1, c2) => (L'.TFun (monoType env c1, monoType env c2), loc) | L.TCFun _ => poly () | L.TRecord (L.CRecord ((L.KType, _), xcs), _) => (L'.TRecord (map (fn (x, t) => (monoName env x, monoType env t)) xcs), loc) | L.TRecord _ => poly () | L.CApp ((L.CFfi ("Basis", "xml"), _), _) => (L'.TFfi ("Basis", "string"), loc) | L.CRel _ => poly () | L.CNamed n => (L'.TNamed n, loc) | L.CFfi mx => (L'.TFfi mx, loc) | L.CApp _ => poly () | L.CAbs _ => poly () | L.CName _ => poly () | L.CRecord _ => poly () | L.CConcat _ => poly () | L.CFold _ => poly () | L.CUnit => poly () end val dummyExp = (L'.EPrim (Prim.Int 0), E.dummySpan) fun fooifyExp name env = let fun fooify (e, tAll as (t, loc)) = case #1 e of L'.EClosure (fnam, [(L'.ERecord [], _)]) => let val (_, _, _, s) = Env.lookupENamed env fnam in (L'.EPrim (Prim.String s), loc) end | L'.EClosure (fnam, args) => let val (_, ft, _, s) = Env.lookupENamed env fnam val ft = monoType env ft fun attrify (args, ft, e) = case (args, ft) of ([], _) => e | (arg :: args, (L'.TFun (t, ft), _)) => (L'.EStrcat (e, (L'.EStrcat ((L'.EPrim (Prim.String "/"), loc), fooify (arg, t)), loc)), loc) | _ => (E.errorAt loc "Type mismatch encoding attribute"; e) in attrify (args, ft, (L'.EPrim (Prim.String s), loc)) end | _ => case t of L'.TFfi ("Basis", "string") => (L'.EFfiApp ("Basis", name ^ "ifyString", [e]), loc) | L'.TFfi ("Basis", "int") => (L'.EFfiApp ("Basis", name ^ "ifyInt", [e]), loc) | L'.TFfi ("Basis", "float") => (L'.EFfiApp ("Basis", name ^ "ifyFloat", [e]), loc) | L'.TRecord [] => (L'.EPrim (Prim.String ""), loc) | _ => (E.errorAt loc "Don't know how to encode attribute type"; Print.eprefaces' [("Type", MonoPrint.p_typ MonoEnv.empty tAll)]; dummyExp) in fooify end val attrifyExp = fooifyExp "attr" val urlifyExp = fooifyExp "url" fun monoExp env (all as (e, loc)) = let fun poly () = (E.errorAt loc "Unsupported expression"; Print.eprefaces' [("Expression", CorePrint.p_exp env all)]; dummyExp) in case e of L.EPrim p => (L'.EPrim p, loc) | L.ERel n => (L'.ERel n, loc) | L.ENamed n => (L'.ENamed n, loc) | L.EFfi mx => (L'.EFfi mx, loc) | L.EFfiApp (m, x, es) => (L'.EFfiApp (m, x, map (monoExp env) es), loc) | L.EApp ((L.ECApp ((L.EFfi ("Basis", "cdata"), _), _), _), se) => monoExp env se | L.EApp ( (L.EApp ( (L.ECApp ( (L.ECApp ( (L.ECApp ( (L.EFfi ("Basis", "join"), _), _), _), _), _), _), _), xml1), _), xml2) => (L'.EStrcat (monoExp env xml1, monoExp env xml2), loc) | L.EApp ( (L.EApp ( (L.EApp ( (L.ECApp ( (L.ECApp ( (L.ECApp ( (L.ECApp ( (L.EFfi ("Basis", "tag"), _), _), _), _), _), _), _), _), _), attrs), _), tag), _), xml) => let fun getTag (e, _) = case e of L.EFfi ("Basis", tag) => tag | _ => (E.errorAt loc "Non-constant XML tag"; Print.eprefaces' [("Expression", CorePrint.p_exp env tag)]; "") val tag = getTag tag val attrs = monoExp env attrs val tagStart = case #1 attrs of L'.ERecord xes => let fun lowercaseFirst "" = "" | lowercaseFirst s = str (Char.toLower (String.sub (s, 0))) ^ String.extract (s, 1, NONE) val s = (L'.EPrim (Prim.String (String.concat ["<", tag])), loc) in foldl (fn ((x, e, t), s) => let val xp = " " ^ lowercaseFirst x ^ "=\"" val fooify = case x of "Link" => urlifyExp | _ => attrifyExp in (L'.EStrcat (s, (L'.EStrcat ((L'.EPrim (Prim.String xp), loc), (L'.EStrcat (fooify env (e, t), (L'.EPrim (Prim.String "\""), loc)), loc)), loc)), loc) end) s xes end | _ => raise Fail "Attributes!" fun normal () = (L'.EStrcat ((L'.EStrcat (tagStart, (L'.EPrim (Prim.String ">"), loc)), loc), (L'.EStrcat (monoExp env xml, (L'.EPrim (Prim.String (String.concat [""])), loc)), loc)), loc) in case xml of (L.EApp ((L.ECApp ((L.EFfi ("Basis", "cdata"), _), _), _), (L.EPrim (Prim.String s), _)), _) => if CharVector.all Char.isSpace s then (L'.EStrcat (tagStart, (L'.EPrim (Prim.String "/>"), loc)), loc) else normal () | _ => normal () end | L.EApp (e1, e2) => (L'.EApp (monoExp env e1, monoExp env e2), loc) | L.EAbs (x, dom, ran, e) => (L'.EAbs (x, monoType env dom, monoType env ran, monoExp (Env.pushERel env x dom) e), loc) | L.ECApp _ => poly () | L.ECAbs _ => poly () | L.ERecord xes => (L'.ERecord (map (fn (x, e, t) => (monoName env x, monoExp env e, monoType env t)) xes), loc) | L.EField (e, x, _) => (L'.EField (monoExp env e, monoName env x), loc) | L.EFold _ => poly () | L.EWrite e => (L'.EWrite (monoExp env e), loc) | L.EClosure (n, es) => (L'.EClosure (n, map (monoExp env) es), loc) end fun monoDecl env (all as (d, loc)) = let fun poly () = (E.errorAt loc "Unsupported declaration"; Print.eprefaces' [("Declaration", CorePrint.p_decl env all)]; NONE) in case d of L.DCon _ => NONE | L.DVal (x, n, t, e, s) => SOME (Env.pushENamed env x n t (SOME e) s, (L'.DVal (x, n, monoType env t, monoExp env e, s), loc)) | L.DExport n => let val (_, t, _, s) = Env.lookupENamed env n fun unwind (t, _) = case t of L.TFun (dom, ran) => dom :: unwind ran | _ => [] val ts = map (monoType env) (unwind t) in SOME (env, (L'.DExport (s, n, ts), loc)) end end fun monoize env ds = let val (_, ds) = List.foldl (fn (d, (env, ds)) => case monoDecl env d of NONE => (env, ds) | SOME (env, d) => (env, d :: ds)) (env, []) ds in rev ds end end