+(* HCoop Domtool (http://hcoop.sourceforge.net/)
+ * Copyright (c) 2006, Adam Chlipala
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*)
+
+(* Pretty-printing Domtool configuration file ASTs *)
+
+structure Print :> PRINT = struct
+
+open Ast
+
+structure SM = TextIOPP
+
+structure PD = PPDescFn(SM)
+open PD
+
+fun dBox ds = hovBox (PPS.Rel 1, ds)
+fun dvBox ds = vBox (PPS.Rel 0, ds)
+fun ivBox ds = vBox (PPS.Rel 1, ds)
+
+fun parenIf pn ds =
+ if pn then
+ dBox (string "(" :: ds @ [string ")"])
+ else
+ dBox ds
+
+fun p_pred' pn (p, _) =
+ case p of
+ CRoot => string "Root"
+ | CConst s => string s
+ | CPrefix p => dBox [string "^", p_pred' true p]
+ | CNot p => dBox [string "!", p_pred' true p]
+ | CAnd (p1, p2) =>
+ parenIf pn [p_pred' true p1, space 1, string "&", space 1, p_pred' true p2]
+
+val p_pred = p_pred' false
+
+fun p_predBoxed p = dBox [string "[", p_pred p, string "]"]
+
+fun p_typ' pn (t, _) =
+ case t of
+ TBase s => string s
+ | TList t => dBox [string "[", p_typ' false t, string "]"]
+ | TArrow (t1, t2) =>
+ parenIf pn [p_typ' true t1, space 1, string "->", space 1, p_typ' true t2]
+ | TAction (p, r1, r2) =>
+ parenIf pn [p_predBoxed p, space 1, p_record r1, space 1,
+ string "->", space 1, p_record r2]
+and p_record r =
+ case StringMap.foldri (fn (name, t, d) =>
+ SOME (case d of
+ NONE => dBox [string name, space 1,
+ string ":", space 1, p_typ t]
+ | SOME d => dBox [dBox [string name, space 1,
+ string ":", space 1, p_typ t],
+ string ",", space 1, d]))
+ NONE r of
+ NONE => string "{}"
+ | SOME d => dBox [string "{", d, string "}"]
+
+and p_typ t = p_typ' false t
+
+fun p_exp (e, _) =
+ case e of
+ EInt n => string (Int.toString n)
+ | EString s => string (String.concat ["\"", String.toString s, "\""])
+ | EList es =>
+ (case foldr (fn (e, d) =>
+ SOME (case d of
+ NONE => p_exp e
+ | SOME d => dBox [p_exp e, string ",", space 1, d]))
+ NONE es of
+ NONE => string "[]"
+ | SOME d => dBox [string "[", d, string "]"])
+
+ | ELam (x, t, e) => dBox [string "(\\", space 1, string x, space 1,
+ string ":", space 1,
+ dBox [string "(", p_typ t, string ")"],
+ space 1, string "->", space 1, p_exp e, string ")"]
+ | EVar x => string x
+ | EApp (e1, e2) => dBox [string "(", p_exp e1, break {nsp = 1, offset = 0}, p_exp e2, string ")"]
+
+ | ESet (x, e) => dBox [string x, space 1, string "=", space 1, p_exp e]
+ | EGet (x1, x2, e) => dBox [dBox [string x1, space 1, string "<-",
+ space 1, string x2, string ";", space 1],
+ p_exp e]
+ | ESeq es => dBox (valOf (foldr (fn (e, NONE) => SOME [p_exp e]
+ | (e, SOME ds) => SOME (dBox [p_exp e, string ";", space 1] :: ds))
+ NONE es))
+ | ELocal (ESeq [e1, e2], _) => dBox [string "let", space 1,
+ p_exp e1, space 1,
+ string "in", space 1,
+ p_exp e2, space 1,
+ string "end"]
+ | ELocal _ => raise Fail "Unexpected ELocal form"
+
+fun print d =
+ let
+ val myStream = SM.openOut {dst = TextIO.stdOut,
+ wid = 80}
+ in
+ description (myStream, d);
+ SM.newline myStream;
+ SM.closeStream myStream
+ end
+
+end
HCoop / hcoop / domtool2.git / commitdiff