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Diffstat (limited to 'src/elab_print.sml')
| -rw-r--r-- | src/elab_print.sml | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/elab_print.sml b/src/elab_print.sml new file mode 100644 index 00000000..18d01695 --- /dev/null +++ b/src/elab_print.sml @@ -0,0 +1,153 @@ +(* 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 + +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_con env x, + space, + string ":", + space, + p_con env c]) xcs, + string "}"] + | TRecord c => box [string "$", + p_con' true env c] + + | CRel n => string (#1 (E.lookupCRel env n) ^ "_" ^ Int.toString n) + | CNamed n => string (#1 (E.lookupCNamed env n) ^ "__" ^ Int.toString n) + + | CApp (c1, c2) => parenIf par (box [p_con env c1, + space, + p_con' true env c2]) + | CAbs (e, x, k, c) => parenIf par (box [string "fn", + space, + string x, + space, + p_explicitness e, + space, + p_kind k, + space, + string "=>", + space, + p_con (E.pushCRel env x k) c]) + + | CName s => box [string "#", string s] + + | CRecord (k, xcs) => 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]) + | 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 (s, _) => string ("<UNIF:" ^ s ^ ">") + +and p_con env = p_con' false env + +fun p_decl env ((d, _) : decl) = + case d of + DCon (x, k, c) => box [string "con", + space, + string x, + space, + string "::", + space, + p_kind k, + space, + string "=", + space, + p_con env c] + +fun p_file env file = + let + val (_, pds) = foldr (fn (d, (env, pds)) => + (ElabUtil.declBinds env d, + p_decl env d :: pds)) + (env, []) file + in + p_list_sep newline (fn x => x) pds + end + +end |