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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 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 attrifyExp env (e, tAll as (t, loc)) =
case #1 e of
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),
attrifyExp env (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", "attrifyString", [e]), loc)
| L'.TFfi ("Basis", "int") => (L'.EFfiApp ("Basis", "attrifyInt", [e]), loc)
| L'.TFfi ("Basis", "float") => (L'.EFfiApp ("Basis", "attrifyFloat", [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)
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 ^ "=\""
in
(L'.EStrcat (s,
(L'.EStrcat ((L'.EPrim (Prim.String xp), loc),
(L'.EStrcat (attrifyExp 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 ["</", tag, ">"])), 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 (_, _, _, s) = Env.lookupENamed env n
in
SOME (env, (L'.DExport (s, n), 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
|
