Mercurial > urweb
view src/expl_print.sml @ 1737:78d7cc9c9b18
Don't modify the module cache after elaboration failures
author | Adam Chlipala <adam@chlipala.net> |
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date | Wed, 02 May 2012 08:56:19 -0400 |
parents | b4480a56cab7 |
children | 1aa9629e3a4c |
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(* Copyright (c) 2008-2010, 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 Ur/Web *) structure ExplPrint :> EXPL_PRINT = struct open Print.PD open Print open Expl structure E = ExplEnv val debug = ref false fun p_kind' par env (k, _) = case k of KType => string "Type" | KArrow (k1, k2) => parenIf par (box [p_kind' true env k1, space, string "->", space, p_kind env k2]) | KName => string "Name" | KRecord k => box [string "{", p_kind env k, string "}"] | KUnit => string "Unit" | KTuple ks => box [string "(", p_list_sep (box [space, string "*", space]) (p_kind env) ks, string ")"] | KRel n => ((if !debug then string (E.lookupKRel env n ^ "_" ^ Int.toString n) else string (E.lookupKRel env n)) handle E.UnboundRel _ => string ("UNBOUND_REL" ^ Int.toString n)) | KFun (x, k) => box [string x, space, string "-->", space, p_kind (E.pushKRel env x) k] and p_kind env = p_kind' false env 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 env 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))) handle E.UnboundRel _ => string ("UNBOUND_REL" ^ Int.toString 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 = #1 (E.lookupStrNamed env m1) handle E.UnboundNamed _ => "UNBOUND" ^ Int.toString m1 val m1s = if !debug then m1x ^ "__" ^ Int.toString m1 else m1x in p_list_sep (string ".") string (m1s :: 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 env 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 env 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]) | CMap _ => string "map" | CUnit => string "()" | CTuple cs => box [string "(", p_list (p_con env) cs, string ")"] | CProj (c, n) => box [p_con env c, string ".", string (Int.toString n)] | CKAbs (x, c) => box [string x, space, string "==>", space, p_con (E.pushKRel env x) c] | CKApp (c, k) => box [p_con env c, string "[[", p_kind env k, string "]]"] | TKFun (x, c) => box [string x, space, string "-->", space, p_con (E.pushKRel env x) c] 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_patCon env pc = case pc of PConVar n => ((if !debug then string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n) else string (#1 (E.lookupENamed env n))) handle E.UnboundNamed _ => string ("UNBOUND_NAMED" ^ Int.toString n)) | PConProj (m1, ms, x) => let val m1x = #1 (E.lookupStrNamed env m1) handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1 val m1s = if !debug then m1x ^ "__" ^ Int.toString m1 else m1x in p_list_sep (string ".") string (m1x :: ms @ [x]) end fun p_pat' par env (p, _) = case p of PWild => string "_" | PVar (s, _) => string s | PPrim p => Prim.p_t p | PCon (_, pc, _, NONE) => p_patCon env pc | PCon (_, pc, cs, SOME p) => if !debug then parenIf par (box [p_patCon env pc, string "[", p_list (p_con env) cs, string "]", space, p_pat' true env p]) else parenIf par (box [p_patCon env pc, space, p_pat' true env p]) | PRecord xps => box [string "{", p_list_sep (box [string ",", space]) (fn (x, p, t) => box [string x, space, string "=", space, p_pat env p, if !debug then box [space, string ":", space, p_con env t] else box []]) xps, string "}"] and p_pat x = p_pat' false x fun p_exp' par env (e, loc) = 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))) handle E.UnboundRel _ => string ("UNBOUND_REL" ^ Int.toString n)) | ENamed n => ((if !debug then string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n) else string (#1 (E.lookupENamed env n))) handle E.UnboundNamed _ => string ("UNBOUND_NAMED" ^ Int.toString n)) | EModProj (m1, ms, x) => let val (m1x, sgn) = E.lookupStrNamed env m1 handle E.UnboundNamed _ => ("UNBOUND" ^ Int.toString m1, (SgnConst [], loc)) val m1s = if !debug then m1x ^ "__" ^ Int.toString m1 else m1x in p_list_sep (string ".") string (m1s :: 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 env 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] | EConcat (e1, c1, e2, c2) => parenIf par (if !debug then box [p_exp' true env e1, space, string ":", space, p_con env c1, space, string "++", space, p_exp' true env e2, space, string ":", space, p_con env c2] else box [p_exp' true env e1, space, string "with", space, p_exp' true env e2]) | ECut (e, c, {field, rest}) => parenIf par (if !debug then box [p_exp' true env e, space, string "--", space, 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, space, string "--", space, p_con' true env c]) | ECutMulti (e, c, {rest}) => parenIf par (if !debug then box [p_exp' true env e, space, string "---", space, p_con' true env c, space, string "[", p_con env rest, string "]"] else box [p_exp' true env e, space, string "---", space, p_con' true env c]) | EWrite e => box [string "write(", p_exp env e, string ")"] | ECase (e, pes, {disc, result}) => parenIf par (box [string "case", space, p_exp env e, space, if !debug then box [string "in", space, p_con env disc, space, string "return", space, p_con env result, space] else box [], string "of", space, p_list_sep (box [space, string "|", space]) (fn (p, e) => box [p_pat env p, space, string "=>", space, p_exp (E.patBinds env p) e]) pes]) | ELet (x, t, e1, e2) => box [string "let", space, string x, space, string ":", space, p_con env t, space, string "=", space, p_exp env e1, space, string "in", newline, p_exp (E.pushERel env x t) e2] | EKAbs (x, e) => box [string x, space, string "==>", space, p_exp (E.pushKRel env x) e] | EKApp (e, k) => box [p_exp env e, string "[[", p_kind env k, string "]]"] 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_datatype env (x, n, xs, cons) = let val k = (KType, ErrorMsg.dummySpan) val env = E.pushCNamed env x n k NONE val env = foldl (fn (x, env) => E.pushCRel env x k) env xs in box [string x, p_list_sep (box []) (fn x => box [space, string x]) xs, space, string "=", space, p_list_sep (box [space, string "|", space]) (fn (x, n, NONE) => if !debug then (string (x ^ "__" ^ Int.toString n)) else string x | (x, n, SOME t) => box [if !debug then (string (x ^ "__" ^ Int.toString n)) else string x, space, string "of", space, p_con env t]) cons] end fun p_sgn_item env (sgiAll as (sgi, _)) = case sgi of SgiConAbs (x, n, k) => box [string "con", space, p_named x n, space, string "::", space, p_kind env k] | SgiCon (x, n, k, c) => box [string "con", space, p_named x n, space, string "::", space, p_kind env k, space, string "=", space, p_con env c] | SgiDatatype x => box [string "datatype", space, p_list_sep (box [space, string "and", space]) (p_datatype (E.sgiBinds env sgiAll)) x] | SgiDatatypeImp (x, _, m1, ms, x', _, _) => let val m1x = #1 (E.lookupStrNamed env m1) handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1 in box [string "datatype", space, string x, space, string "=", space, string "datatype", space, p_list_sep (string ".") string (m1x :: ms @ [x'])] end | 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] | SgiSgn (x, n, sgn) => box [string "signature", space, p_named x n, space, string "=", space, p_sgn env sgn] and p_sgn env (sgn, loc) = 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)) handle E.UnboundNamed _ => "UNBOUND" ^ Int.toString n) | SgnFun (x, n, sgn, sgn') => box [string "functor", space, string "(", p_named x n, space, string ":", space, p_sgn env sgn, string ")", space, string ":", space, p_sgn (E.pushStrNamed env x n sgn) sgn'] | SgnWhere (sgn, x, c) => box [p_sgn env sgn, space, string "where", space, string "con", space, string x, space, string "=", space, p_con env c] | SgnProj (m1, ms, x) => let val (m1x, sgn) = E.lookupStrNamed env m1 handle E.UnboundNamed _ => ("UNBOUND" ^ Int.toString m1, (SgnConst [], loc)) val m1s = if !debug then m1x ^ "__" ^ Int.toString m1 else m1x in p_list_sep (string ".") string (m1x :: ms @ [x]) end fun p_vali env (x, n, t, e) = box [p_named x n, space, string ":", space, p_con env t, space, string "=", space, p_exp env e] fun p_decl env (dAll as (d, _) : decl) = case d of DCon (x, n, k, c) => box [string "con", space, p_named x n, space, string "::", space, p_kind env k, space, string "=", space, p_con env c] | DDatatype x => box [string "datatype", space, p_list_sep (box [space, string "and", space]) (p_datatype (E.declBinds env dAll)) x] | DDatatypeImp (x, _, m1, ms, x', _, _) => let val m1x = #1 (E.lookupStrNamed env m1) handle E.UnboundNamed _ => "UNBOUND_STR_" ^ Int.toString m1 in box [string "datatype", space, string x, space, string "=", space, string "datatype", space, p_list_sep (string ".") string (m1x :: ms @ [x'])] end | DVal vi => box [string "val", space, p_vali env vi] | DValRec vis => let val env = E.declBinds env dAll in box [string "val", space, string "rec", space, p_list_sep (box [newline, string "and", space]) (p_vali env) vis] end | 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] | DFfiStr (x, n, sgn) => box [string "extern", space, string "structure", space, p_named x n, space, string ":", space, p_sgn env sgn] | DExport (_, sgn, str) => box [string "export", space, p_str env str, space, string ":", space, p_sgn env sgn] | DTable (_, x, n, c, pe, _, ce, _) => box [string "table", space, p_named x n, space, string ":", space, p_con env c, space, string "keys", space, p_exp env pe, space, string "constraints", space, p_exp env ce] | DSequence (_, x, n) => box [string "sequence", space, p_named x n] | DView (_, x, n, e, _) => box [string "view", space, p_named x n, space, string "as", space, p_exp env e] | DDatabase s => box [string "database", space, string s] | DCookie (_, x, n, c) => box [string "cookie", space, p_named x n, space, string ":", space, p_con env c] | DStyle (_, x, n) => box [string "style", space, p_named x n] | DTask (e1, e2) => box [string "task", space, p_exp env e1, space, string "=", space, p_exp env e2] | DPolicy e1 => box [string "policy", space, p_exp env e1] | DOnError _ => string "ONERROR" and p_str env (str, _) = case str of StrConst ds => box [string "struct", newline, p_file env ds, newline, string "end"] | StrVar n => let val x = #1 (E.lookupStrNamed env n) handle E.UnboundNamed _ => "UNBOUND" ^ Int.toString n val s = if !debug then x ^ "__" ^ Int.toString n else x in string s end | StrProj (str, s) => box [p_str env str, string ".", string s] | StrFun (x, n, sgn, sgn', str) => let val env' = E.pushStrNamed env x n sgn in box [string "functor", space, string "(", p_named x n, space, string ":", space, p_sgn env sgn, string ")", space, string ":", space, p_sgn env' sgn', space, string "=>", space, p_str env' str] end | StrApp (str1, str2) => box [p_str env str1, string "(", p_str env str2, string ")"] 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