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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.
*)
(* Pretty-printing elaborated Laconic/Web *)
structure ElabPrint :> ELAB_PRINT = struct
open Print.PD
open Print
open Elab
structure E = ElabEnv
val debug = ref false
fun p_kind' par (k, _) =
case k of
KType => string "Type"
| KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
space,
string "->",
space,
p_kind k2])
| KName => string "Name"
| KRecord k => box [string "{", p_kind k, string "}"]
| KError => string "<ERROR>"
| KUnif (_, ref (SOME k)) => p_kind' par k
| KUnif (s, _) => string ("<UNIF:" ^ s ^ ">")
and p_kind k = p_kind' false k
fun p_explicitness e =
case e of
Explicit => string "::"
| Implicit => string ":::"
fun p_con' par env (c, _) =
case c of
TFun (t1, t2) => parenIf par (box [p_con' true env t1,
space,
string "->",
space,
p_con env t2])
| TCFun (e, x, k, c) => parenIf par (box [string x,
space,
p_explicitness e,
space,
p_kind k,
space,
string "->",
space,
p_con (E.pushCRel env x k) c])
| TRecord (CRecord (_, xcs), _) => box [string "{",
p_list (fn (x, c) =>
box [p_name env x,
space,
string ":",
space,
p_con env c]) xcs,
string "}"]
| TRecord c => box [string "$",
p_con' true env c]
| CRel n =>
if !debug then
string (#1 (E.lookupCRel env n) ^ "_" ^ Int.toString n)
else
string (#1 (E.lookupCRel env n))
| CNamed n =>
((if !debug then
string (#1 (E.lookupCNamed env n) ^ "__" ^ Int.toString n)
else
string (#1 (E.lookupCNamed env n)))
handle E.UnboundNamed _ => string ("UNBOUND_NAMED" ^ Int.toString n))
| CModProj (m1, ms, x) =>
let
val (m1x, sgn) = E.lookupStrNamed env m1
val m1s = if !debug then
m1x ^ "__" ^ Int.toString m1
else
m1x
in
p_list_sep (string ".") string (m1x :: ms @ [x])
end
| CApp (c1, c2) => parenIf par (box [p_con env c1,
space,
p_con' true env c2])
| CAbs (x, k, c) => parenIf par (box [string "fn",
space,
string x,
space,
string "::",
space,
p_kind k,
space,
string "=>",
space,
p_con (E.pushCRel env x k) c])
| CName s => box [string "#", string s]
| CRecord (k, xcs) =>
if !debug then
parenIf par (box [string "[",
p_list (fn (x, c) =>
box [p_con env x,
space,
string "=",
space,
p_con env c]) xcs,
string "]::",
p_kind k])
else
parenIf par (box [string "[",
p_list (fn (x, c) =>
box [p_con env x,
space,
string "=",
space,
p_con env c]) xcs,
string "]"])
| CConcat (c1, c2) => parenIf par (box [p_con' true env c1,
space,
string "++",
space,
p_con env c2])
| CError => string "<ERROR>"
| CUnif (_, _, ref (SOME c)) => p_con' par env c
| CUnif (k, s, _) => box [string ("<UNIF:" ^ s ^ "::"),
p_kind k,
string ">"]
and p_con env = p_con' false env
and p_name env (all as (c, _)) =
case c of
CName s => string s
| _ => p_con env all
fun p_exp' par env (e, _) =
case e of
EPrim p => Prim.p_t p
| ERel n =>
if !debug then
string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
else
string (#1 (E.lookupERel env n))
| ENamed n =>
if !debug then
string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
else
string (#1 (E.lookupENamed env n))
| EModProj (m1, ms, x) =>
let
val (m1x, sgn) = E.lookupStrNamed env m1
val m1s = if !debug then
m1x ^ "__" ^ Int.toString m1
else
m1x
in
p_list_sep (string ".") string (m1x :: ms @ [x])
end
| EApp (e1, e2) => parenIf par (box [p_exp env e1,
space,
p_exp' true env e2])
| EAbs (x, t, _, e) => parenIf par (box [string "fn",
space,
string x,
space,
string ":",
space,
p_con env t,
space,
string "=>",
space,
p_exp (E.pushERel env x t) e])
| ECApp (e, c) => parenIf par (box [p_exp env e,
space,
string "[",
p_con env c,
string "]"])
| ECAbs (exp, x, k, e) => parenIf par (box [string "fn",
space,
string x,
space,
p_explicitness exp,
space,
p_kind k,
space,
string "=>",
space,
p_exp (E.pushCRel env x k) e])
| ERecord xes => box [string "{",
p_list (fn (x, e, _) =>
box [p_name env x,
space,
string "=",
space,
p_exp env e]) xes,
string "}"]
| EField (e, c, {field, rest}) =>
if !debug then
box [p_exp' true env e,
string ".",
p_con' true env c,
space,
string "[",
p_con env field,
space,
string " in ",
space,
p_con env rest,
string "]"]
else
box [p_exp' true env e,
string ".",
p_con' true env c]
| EError => string "<ERROR>"
and p_exp env = p_exp' false env
fun p_named x n =
if !debug then
box [string x,
string "__",
string (Int.toString n)]
else
string x
fun p_sgn_item env (sgi, _) =
case sgi of
SgiConAbs (x, n, k) => box [string "con",
space,
p_named x n,
space,
string "::",
space,
p_kind k]
| SgiCon (x, n, k, c) => box [string "con",
space,
p_named x n,
space,
string "::",
space,
p_kind k,
space,
string "=",
space,
p_con env c]
| SgiVal (x, n, c) => box [string "val",
space,
p_named x n,
space,
string ":",
space,
p_con env c]
| SgiStr (x, n, sgn) => box [string "structure",
space,
p_named x n,
space,
string ":",
space,
p_sgn env sgn]
and p_sgn env (sgn, _) =
case sgn of
SgnConst sgis => box [string "sig",
newline,
let
val (psgis, _) = ListUtil.foldlMap (fn (sgi, env) =>
(p_sgn_item env sgi,
E.sgiBinds env sgi))
env sgis
in
p_list_sep newline (fn x => x) psgis
end,
newline,
string "end"]
| SgnVar n => string (#1 (E.lookupSgnNamed env n))
| SgnFun (x, n, sgn, sgn') => box [string "functor",
space,
string "(",
string x,
space,
string ":",
space,
p_sgn env sgn,
string ")",
space,
string ":",
space,
p_sgn (E.pushStrNamedAs env x n sgn) sgn']
| SgnError => string "<ERROR>"
fun p_decl env ((d, _) : decl) =
case d of
DCon (x, n, k, c) => box [string "con",
space,
p_named x n,
space,
string "::",
space,
p_kind k,
space,
string "=",
space,
p_con env c]
| DVal (x, n, t, e) => box [string "val",
space,
p_named x n,
space,
string ":",
space,
p_con env t,
space,
string "=",
space,
p_exp env e]
| DSgn (x, n, sgn) => box [string "signature",
space,
p_named x n,
space,
string "=",
space,
p_sgn env sgn]
| DStr (x, n, sgn, str) => box [string "structure",
space,
p_named x n,
space,
string ":",
space,
p_sgn env sgn,
space,
string "=",
space,
p_str env str]
and p_str env (str, _) =
case str of
StrConst ds => box [string "struct",
newline,
p_file env ds,
newline,
string "end"]
| StrVar n => string (#1 (E.lookupStrNamed env n))
| StrProj (str, s) => box [p_str env str,
string ".",
string s]
| StrFun (x, n, sgn, sgn', str) =>
let
val env' = E.pushStrNamedAs env x n sgn
in
box [string "functor",
space,
string "(",
string x,
space,
string ":",
space,
p_sgn env sgn,
string ")",
space,
string ":",
space,
p_sgn env' sgn',
space,
string "=>",
space,
p_str env' str]
end
| StrError => string "<ERROR>"
and p_file env file =
let
val (pds, _) = ListUtil.foldlMap (fn (d, env) =>
(p_decl env d,
E.declBinds env d))
env file
in
p_list_sep newline (fn x => x) pds
end
end
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