--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/expl_print.sml	Thu Jun 19 10:06:59 2008 -0400
@@ -0,0 +1,363 @@
+(* 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 ExplPrint :> EXPL_PRINT = struct
+
+open Print.PD
+open Print
+
+open Expl
+
+structure E = ExplEnv
+
+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 "}"]
+
+and p_kind k = p_kind' false k
+
+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 (x, k, c) => parenIf par (box [string x,
+                                             space,
+                                             string "::",
+                                             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])
+        
+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 (x, k, e) => parenIf par (box [string "fn",
+                                             space,
+                                             string x,
+                                             space,
+                                             string "::",
+                                             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]
+
+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))
+
+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]
+
+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