Mercurial > urweb
view src/urweb.grm @ 1560:63311c13d9f7
Added 'target' attribute for 'a' tag.
| author | Vladimir Shabanov <vshabanoff@gmail.com> |
|---|---|
| date | Mon, 12 Sep 2011 00:43:41 +0400 |
| parents | 6f046b4bad24 |
| children | a0caa991cdad |
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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 SOFTARE 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. *) (* Grammar for Ur/Web programs *) open Source val s = ErrorMsg.spanOf val dummy = ErrorMsg.dummySpan fun capitalize "" = "" | capitalize s = str (Char.toUpper (String.sub (s, 0))) ^ String.extract (s, 1, NONE) fun entable t = case #1 t of TRecord c => c | _ => t datatype select_item = Field of con * con | Exp of con option * exp | Fields of con * con datatype select = Star | Items of select_item list datatype group_item = GField of con * con | GFields of con * con fun eqTnames ((c1, _), (c2, _)) = case (c1, c2) of (CVar (ms1, x1), CVar (ms2, x2)) => ms1 = ms2 andalso x1 = x2 | (CName x1, CName x2) => x1 = x2 | _ => false fun nameString (c, _) = case c of CName s => s | CVar (_, x) => x | _ => "?" fun amend_select loc (si, (count, tabs, exps)) = case si of Field (tx, fx) => let val c = (CRecord ([(fx, (CWild (KType, loc), loc))]), loc) val (tabs, found) = ListUtil.foldlMap (fn ((tx', c'), found) => if eqTnames (tx, tx') then ((tx', (CConcat (c, c'), loc)), true) else ((tx', c'), found)) false tabs in if found then () else ErrorMsg.errorAt loc ("Select of field " ^ nameString fx ^ " from unbound table " ^ nameString tx); (count, tabs, exps) end | Fields (tx, fs) => let val (tabs, found) = ListUtil.foldlMap (fn ((tx', c'), found) => if eqTnames (tx, tx') then ((tx', (CConcat (fs, c'), loc)), true) else ((tx', c'), found)) false tabs in if found then () else ErrorMsg.errorAt loc "Select of field from unbound table"; (count, tabs, exps) end | Exp (SOME c, e) => (count, tabs, (c, e) :: exps) | Exp (NONE, e) => (count+1, tabs, ((CName (Int.toString count), loc), e) :: exps) fun amend_group loc (gi, tabs) = let val (tx, c) = case gi of GField (tx, fx) => (tx, (CRecord ([(fx, (CWild (KType, loc), loc))]), loc)) | GFields (tx, fxs) => (tx, fxs) val (tabs, found) = ListUtil.foldlMap (fn ((tx', c'), found) => if eqTnames (tx, tx') then ((tx', (CConcat (c, c'), loc)), true) else ((tx', c'), found)) false tabs in if found then () else ErrorMsg.errorAt loc "Select of field from unbound table"; tabs end fun sql_inject (v, loc) = (EApp ((EVar (["Basis"], "sql_inject", Infer), loc), (v, loc)), loc) fun sql_binary (oper, sqlexp1, sqlexp2, loc) = let val e = (EVar (["Basis"], "sql_binary", Infer), loc) val e = (EApp (e, (EVar (["Basis"], "sql_" ^ oper, Infer), loc)), loc) val e = (EApp (e, sqlexp1), loc) in (EApp (e, sqlexp2), loc) end fun sql_unary (oper, sqlexp, loc) = let val e = (EVar (["Basis"], "sql_unary", Infer), loc) val e = (EApp (e, (EVar (["Basis"], "sql_" ^ oper, Infer), loc)), loc) in (EApp (e, sqlexp), loc) end fun sql_relop (oper, all, sqlexp1, sqlexp2, loc) = let val e = (EVar (["Basis"], "sql_relop", Infer), loc) val e = (EApp (e, (EVar (["Basis"], "sql_" ^ oper, Infer), loc)), loc) val e = (EApp (e, (EVar (["Basis"], if all then "True" else "False", Infer), loc)), loc) val e = (EApp (e, sqlexp1), loc) in (EApp (e, sqlexp2), loc) end fun sql_nfunc (oper, loc) = let val e = (EVar (["Basis"], "sql_nfunc", Infer), loc) in (EApp (e, (EVar (["Basis"], "sql_" ^ oper, Infer), loc)), loc) end fun native_unop (oper, e1, loc) = let val e = (EVar (["Basis"], oper, Infer), loc) in (EApp (e, e1), loc) end fun native_op (oper, e1, e2, loc) = let val e = (EVar (["Basis"], oper, Infer), loc) val e = (EApp (e, e1), loc) in (EApp (e, e2), loc) end val inDml = ref false fun tagIn bt = case bt of "table" => "tabl" | _ => bt datatype prop_kind = Delete | Update datatype attr = Class of exp | Normal of con * exp fun patType loc (p : pat) = case #1 p of PAnnot (_, t) => t | _ => (CWild (KType, loc), loc) fun tnamesOf (e, _) = case e of EApp (e1, e2) => tnamesOf e1 @ tnamesOf e2 | ECApp (e, c as (CName _, _)) => let fun isFt (e, _) = case e of EVar (["Basis"], "sql_from_table", _) => true | EVar ([], "sql_from_table", _) => true | ECApp (e, _) => isFt e | EApp (e, _) => isFt e | EDisjointApp e => isFt e | _ => false in (if isFt e then [c] else []) @ tnamesOf e end | ECApp (e, _) => tnamesOf e | EDisjointApp e => tnamesOf e | _ => [] %% %header (functor UrwebLrValsFn(structure Token : TOKEN)) %term EOF | STRING of string | INT of Int64.int | FLOAT of Real64.real | CHAR of char | SYMBOL of string | CSYMBOL of string | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE | EQ | COMMA | COLON | DCOLON | DCOLONWILD | TCOLON | TCOLONWILD | DOT | HASH | UNDER | UNDERUNDER | BAR | PLUS | MINUS | DIVIDE | DOTDOTDOT | MOD | AT | CON | LTYPE | VAL | REC | AND | FUN | MAP | UNIT | KUNIT | CLASS | DATATYPE | OF | TYPE | NAME | ARROW | LARROW | DARROW | STAR | SEMI | KARROW | DKARROW | BANG | FN | PLUSPLUS | MINUSMINUS | MINUSMINUSMINUS | DOLLAR | TWIDDLE | CARET | LET | IN | STRUCTURE | SIGNATURE | STRUCT | SIG | END | FUNCTOR | WHERE | EXTERN | SQL | SELECT1 | INCLUDE | OPEN | CONSTRAINT | CONSTRAINTS | EXPORT | TABLE | SEQUENCE | VIEW | COOKIE | STYLE | TASK | POLICY | CASE | IF | THEN | ELSE | ANDALSO | ORELSE | XML_BEGIN of string | XML_END | XML_BEGIN_END of string | NOTAGS of string | BEGIN_TAG of string | END_TAG of string | SELECT | DISTINCT | FROM | AS | CWHERE | GROUP | ORDER | BY | HAVING | UNION | INTERSECT | EXCEPT | LIMIT | OFFSET | ALL | TRUE | FALSE | CAND | OR | NOT | COUNT | AVG | SUM | MIN | MAX | ASC | DESC | INSERT | INTO | VALUES | UPDATE | SET | DELETE | NULL | IS | CURRENT_TIMESTAMP | NE | LT | LE | GT | GE | CCONSTRAINT | UNIQUE | CHECK | PRIMARY | FOREIGN | KEY | ON | NO | ACTION | RESTRICT | CASCADE | REFERENCES | JOIN | INNER | CROSS | OUTER | LEFT | RIGHT | FULL %nonterm file of decl list | decls of decl list | decl of decl list | vali of string * con option * exp | valis of (string * con option * exp) list | copt of con option | dargs of string list | barOpt of unit | dcons of (string * con option) list | dtype of string * string list * (string * con option) list | dtypes of (string * string list * (string * con option) list) list | dcon of string * con option | pkopt of exp | commaOpt of unit | cst of exp | csts of exp | cstopt of exp | ckl of (string * kind option) list | pmode of prop_kind * exp | pkind of prop_kind | prule of exp | pmodes of (prop_kind * exp) list | sgn of sgn | sgntm of sgn | sgi of sgn_item | sgis of sgn_item list | str of str | kind of kind | ktuple of kind list | kcolon of explicitness | kopt of kind option | path of string list * string | cpath of string list * string | spath of str | mpath of string list | cexp of con | capps of con | cterm of con | ctuple of con list | ctuplev of con list | ident of con | idents of con list | rcon of (con * con) list | rconn of (con * con) list | rcone of (con * con) list | cargs of con * kind -> con * kind | cargl of con * kind -> con * kind | cargl2 of con * kind -> con * kind | carg of con * kind -> con * kind | cargp of con * kind -> con * kind | eexp of exp | eapps of exp | eterm of exp | etuple of exp list | rexp of (con * exp) list | xml of exp | xmlOne of exp | xmlOpt of exp | tag of (string * exp) * exp option * exp | tagHead of string * exp | bind of string * con option * exp | edecl of edecl | edecls of edecl list | earg of exp * con -> exp * con | eargp of exp * con -> exp * con | earga of exp * con -> exp * con | eargs of exp * con -> exp * con | eargl of exp * con -> exp * con | eargl2 of exp * con -> exp * con | branch of pat * exp | branchs of (pat * exp) list | pat of pat | patS of pat | pterm of pat | rpat of (string * pat) list * bool | ptuple of pat list | attrs of exp option * (con * exp) list | attr of attr | attrv of exp | query of exp | query1 of exp | dopt of exp | tables of con list * exp | fitem of con list * exp | tname of con | tnameW of con * con | tnames of (con * con) * (con * con) list | tnames' of (con * con) * (con * con) list | table of con * exp | table' of con * exp | tident of con | fident of con | seli of select_item | selis of select_item list | select of select | sqlexp of exp | wopt of exp | groupi of group_item | groupis of group_item list | gopt of group_item list option | hopt of exp | obopt of exp | obitem of exp * exp | obexps of exp | diropt of exp | lopt of exp | ofopt of exp | sqlint of exp | sqlagg of string | fname of exp | texp of exp | fields of con list | sqlexps of exp list | fsets of (con * exp) list | enterDml of unit | leaveDml of unit %verbose (* print summary of errors *) %pos int (* positions *) %start file %pure %eop EOF %noshift EOF %name Urweb %right KARROW %nonassoc DKARROW %right SEMI %nonassoc LARROW %nonassoc IF THEN ELSE %nonassoc DARROW %left ANDALSO %left ORELSE %nonassoc COLON %nonassoc DCOLON TCOLON DCOLONWILD TCOLONWILD %left UNION INTERSECT EXCEPT ALL %right COMMA %right JOIN INNER CROSS OUTER LEFT RIGHT FULL %right OR %right CAND %nonassoc EQ NE LT LE GT GE IS %right ARROW %right CARET PLUSPLUS %left MINUSMINUS MINUSMINUSMINUS %left PLUS MINUS %left STAR DIVIDE MOD %left NOT %nonassoc TWIDDLE %nonassoc DOLLAR %left DOT %nonassoc LBRACE RBRACE %% file : decls (decls) | SIG sgis ([(DSgn ("?", (SgnConst sgis, s (SIGleft, sgisright))), s (SIGleft, sgisright))]) decls : ([]) | decl decls (decl @ decls) decl : CON SYMBOL cargl2 kopt EQ cexp (let val loc = s (CONleft, cexpright) val k = Option.getOpt (kopt, (KWild, loc)) val (c, k) = cargl2 (cexp, k) in [(DCon (SYMBOL, SOME k, c), loc)] end) | LTYPE SYMBOL EQ cexp ([(DCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp), s (LTYPEleft, cexpright))]) | DATATYPE dtypes ([(DDatatype dtypes, s (DATATYPEleft, dtypesright))]) | DATATYPE SYMBOL dargs EQ DATATYPE CSYMBOL DOT path (case dargs of [] => [(DDatatypeImp (SYMBOL, CSYMBOL :: #1 path, #2 path), s (DATATYPEleft, pathright))] | _ => raise Fail "Arguments specified for imported datatype") | VAL vali ([(DVal vali, s (VALleft, valiright))]) | VAL REC valis ([(DValRec valis, s (VALleft, valisright))]) | FUN valis ([(DValRec valis, s (FUNleft, valisright))]) | SIGNATURE CSYMBOL EQ sgn ([(DSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))]) | STRUCTURE CSYMBOL EQ str ([(DStr (CSYMBOL, NONE, str), s (STRUCTUREleft, strright))]) | STRUCTURE CSYMBOL COLON sgn EQ str ([(DStr (CSYMBOL, SOME sgn, str), s (STRUCTUREleft, strright))]) | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN EQ str ([(DStr (CSYMBOL1, NONE, (StrFun (CSYMBOL2, sgn1, NONE, str), s (FUNCTORleft, strright))), s (FUNCTORleft, strright))]) | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn EQ str ([(DStr (CSYMBOL1, NONE, (StrFun (CSYMBOL2, sgn1, SOME sgn2, str), s (FUNCTORleft, strright))), s (FUNCTORleft, strright))]) | EXTERN STRUCTURE CSYMBOL COLON sgn ([(DFfiStr (CSYMBOL, sgn), s (EXTERNleft, sgnright))]) | OPEN mpath (case mpath of [] => raise Fail "Impossible mpath parse [1]" | m :: ms => [(DOpen (m, ms), s (OPENleft, mpathright))]) | OPEN mpath LPAREN str RPAREN (let val loc = s (OPENleft, RPARENright) val m = case mpath of [] => raise Fail "Impossible mpath parse [4]" | m :: ms => foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms in [(DStr ("anon", NONE, (StrApp (m, str), loc)), loc), (DOpen ("anon", []), loc)] end) | OPEN CONSTRAINTS mpath (case mpath of [] => raise Fail "Impossible mpath parse [3]" | m :: ms => [(DOpenConstraints (m, ms), s (OPENleft, mpathright))]) | CONSTRAINT cterm TWIDDLE cterm ([(DConstraint (cterm1, cterm2), s (CONSTRAINTleft, ctermright))]) | EXPORT spath ([(DExport spath, s (EXPORTleft, spathright))]) | TABLE SYMBOL COLON cterm pkopt commaOpt cstopt([(DTable (SYMBOL, entable cterm, pkopt, cstopt), s (TABLEleft, cstoptright))]) | SEQUENCE SYMBOL ([(DSequence SYMBOL, s (SEQUENCEleft, SYMBOLright))]) | VIEW SYMBOL EQ query ([(DView (SYMBOL, query), s (VIEWleft, queryright))]) | VIEW SYMBOL EQ LBRACE eexp RBRACE ([(DView (SYMBOL, eexp), s (VIEWleft, RBRACEright))]) | CLASS SYMBOL EQ cexp (let val loc = s (CLASSleft, cexpright) in [(DClass (SYMBOL, (KWild, loc), cexp), loc)] end) | CLASS SYMBOL DCOLON kind EQ cexp ([(DClass (SYMBOL, kind, cexp), s (CLASSleft, cexpright))]) | CLASS SYMBOL SYMBOL EQ cexp (let val loc = s (CLASSleft, cexpright) val k = (KWild, loc) val c = (CAbs (SYMBOL2, SOME k, cexp), loc) in [(DClass (SYMBOL1, k, c), s (CLASSleft, cexpright))] end) | CLASS SYMBOL LPAREN SYMBOL DCOLON kind RPAREN EQ cexp (let val loc = s (CLASSleft, cexpright) val c = (CAbs (SYMBOL2, SOME kind, cexp), loc) in [(DClass (SYMBOL1, kind, c), s (CLASSleft, cexpright))] end) | COOKIE SYMBOL COLON cexp ([(DCookie (SYMBOL, cexp), s (COOKIEleft, cexpright))]) | STYLE SYMBOL ([(DStyle SYMBOL, s (STYLEleft, SYMBOLright))]) | TASK eapps EQ eexp ([(DTask (eapps, eexp), s (TASKleft, eexpright))]) | POLICY eexp ([(DPolicy eexp, s (POLICYleft, eexpright))]) dtype : SYMBOL dargs EQ barOpt dcons (SYMBOL, dargs, dcons) dtypes : dtype ([dtype]) | dtype AND dtypes (dtype :: dtypes) kopt : (NONE) | DCOLON kind (SOME kind) | DCOLONWILD (SOME (KWild, s (DCOLONWILDleft, DCOLONWILDright))) dargs : ([]) | SYMBOL dargs (SYMBOL :: dargs) barOpt : () | BAR () dcons : dcon ([dcon]) | dcon BAR dcons (dcon :: dcons) dcon : CSYMBOL (CSYMBOL, NONE) | CSYMBOL OF cexp (CSYMBOL, SOME cexp) vali : SYMBOL eargl2 copt EQ eexp (let val loc = s (SYMBOLleft, eexpright) val t = Option.getOpt (copt, (CWild (KType, loc), loc)) val (e, t) = eargl2 (eexp, t) in (SYMBOL, SOME t, e) end) copt : (NONE) | COLON cexp (SOME cexp) cstopt : (EVar (["Basis"], "no_constraint", Infer), dummy) | csts (csts) csts : CCONSTRAINT tname cst (let val loc = s (CCONSTRAINTleft, cstright) val e = (EVar (["Basis"], "one_constraint", Infer), loc) val e = (ECApp (e, tname), loc) in (EApp (e, cst), loc) end) | csts COMMA csts (let val loc = s (csts1left, csts2right) val e = (EVar (["Basis"], "join_constraints", Infer), loc) val e = (EApp (e, csts1), loc) in (EApp (e, csts2), loc) end) | LBRACE LBRACE eexp RBRACE RBRACE (eexp) cst : UNIQUE tnames (let val loc = s (UNIQUEleft, tnamesright) val e = (EVar (["Basis"], "unique", Infer), loc) val e = (ECApp (e, #1 (#1 tnames)), loc) val e = (ECApp (e, (CRecord (#2 tnames), loc)), loc) in e end) | CHECK sqlexp (let val loc = s (CHECKleft, sqlexpright) in (EApp ((EVar (["Basis"], "check", Infer), loc), sqlexp), loc) end) | FOREIGN KEY tnames REFERENCES texp LPAREN tnames' RPAREN pmodes (let val loc = s (FOREIGNleft, pmodesright) val mat = ListPair.foldrEq (fn ((nm1, _), (nm2, _), mat) => let val e = (EVar (["Basis"], "mat_cons", Infer), loc) val e = (ECApp (e, nm1), loc) val e = (ECApp (e, nm2), loc) in (EApp (e, mat), loc) end) (EVar (["Basis"], "mat_nil", Infer), loc) (#1 tnames :: #2 tnames, #1 tnames' :: #2 tnames') handle ListPair.UnequalLengths => (ErrorMsg.errorAt loc ("Unequal foreign key list lengths (" ^ Int.toString (1 + length (#2 tnames)) ^ " vs. " ^ Int.toString (1 + length (#2 tnames')) ^ ")"); (EVar (["Basis"], "mat_nil", Infer), loc)) fun findMode mode = let fun findMode' pmodes = case pmodes of [] => (EVar (["Basis"], "no_action", Infer), loc) | (mode', rule) :: pmodes' => if mode' = mode then (if List.exists (fn (mode', _) => mode' = mode) pmodes' then ErrorMsg.errorAt loc "Duplicate propagation rule" else (); rule) else findMode' pmodes' in findMode' pmodes end val e = (EVar (["Basis"], "foreign_key", Infer), loc) val e = (EApp (e, mat), loc) val e = (EApp (e, texp), loc) in (EApp (e, (ERecord [((CName "OnDelete", loc), findMode Delete), ((CName "OnUpdate", loc), findMode Update)], loc)), loc) end) | LBRACE eexp RBRACE (eexp) tnameW : tname (let val loc = s (tnameleft, tnameright) in (tname, (CWild (KType, loc), loc)) end) tnames : tnameW (tnameW, []) | LPAREN tnames' RPAREN (tnames') tnames': tnameW (tnameW, []) | tnameW COMMA tnames' (#1 tnames', tnameW :: #2 tnames') pmode : ON pkind prule (pkind, prule) pkind : DELETE (Delete) | UPDATE (Update) prule : NO ACTION (EVar (["Basis"], "no_action", Infer), s (NOleft, ACTIONright)) | RESTRICT (EVar (["Basis"], "restrict", Infer), s (RESTRICTleft, RESTRICTright)) | CASCADE (EVar (["Basis"], "cascade", Infer), s (CASCADEleft, CASCADEright)) | SET NULL (EVar (["Basis"], "set_null", Infer), s (SETleft, NULLright)) pmodes : ([]) | pmode pmodes (pmode :: pmodes) commaOpt: () | COMMA () pkopt : (EVar (["Basis"], "no_primary_key", Infer), dummy) | PRIMARY KEY tnames (let val loc = s (PRIMARYleft, tnamesright) val e = (EVar (["Basis"], "primary_key", TypesOnly), loc) val e = (ECApp (e, #1 (#1 tnames)), loc) val e = (ECApp (e, (CRecord (#2 tnames), loc)), loc) val e = (EDisjointApp e, loc) val e = (EDisjointApp e, loc) val witness = map (fn (c, _) => (c, (EWild, loc))) (#1 tnames :: #2 tnames) val witness = (ERecord witness, loc) in (EApp (e, witness), loc) end) valis : vali ([vali]) | vali AND valis (vali :: valis) sgn : sgntm (sgntm) | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn (SgnFun (CSYMBOL, sgn1, sgn2), s (FUNCTORleft, sgn2right)) sgntm : SIG sgis END (SgnConst sgis, s (SIGleft, ENDright)) | mpath (case mpath of [] => raise Fail "Impossible mpath parse [2]" | [x] => SgnVar x | m :: ms => SgnProj (m, List.take (ms, length ms - 1), List.nth (ms, length ms - 1)), s (mpathleft, mpathright)) | sgntm WHERE CON SYMBOL EQ cexp (SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright)) | sgntm WHERE LTYPE SYMBOL EQ cexp(SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright)) | LPAREN sgn RPAREN (sgn) sgi : CON SYMBOL DCOLON kind ((SgiConAbs (SYMBOL, kind), s (CONleft, kindright))) | LTYPE SYMBOL ((SgiConAbs (SYMBOL, (KType, s (LTYPEleft, SYMBOLright))), s (LTYPEleft, SYMBOLright))) | CON SYMBOL EQ cexp ((SgiCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))) | CON SYMBOL DCOLON kind EQ cexp ((SgiCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))) | LTYPE SYMBOL EQ cexp ((SgiCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp), s (LTYPEleft, cexpright))) | DATATYPE dtypes ((SgiDatatype dtypes, s (DATATYPEleft, dtypesright))) | DATATYPE SYMBOL dargs EQ DATATYPE CSYMBOL DOT path (case dargs of [] => (SgiDatatypeImp (SYMBOL, CSYMBOL :: #1 path, #2 path), s (DATATYPEleft, pathright)) | _ => raise Fail "Arguments specified for imported datatype") | VAL SYMBOL COLON cexp ((SgiVal (SYMBOL, cexp), s (VALleft, cexpright))) | STRUCTURE CSYMBOL COLON sgn ((SgiStr (CSYMBOL, sgn), s (STRUCTUREleft, sgnright))) | SIGNATURE CSYMBOL EQ sgn ((SgiSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))) | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn ((SgiStr (CSYMBOL1, (SgnFun (CSYMBOL2, sgn1, sgn2), s (FUNCTORleft, sgn2right))), s (FUNCTORleft, sgn2right))) | INCLUDE sgn ((SgiInclude sgn, s (INCLUDEleft, sgnright))) | CONSTRAINT cterm TWIDDLE cterm ((SgiConstraint (cterm1, cterm2), s (CONSTRAINTleft, ctermright))) | TABLE SYMBOL COLON cterm pkopt commaOpt cstopt (let val loc = s (TABLEleft, ctermright) in (SgiTable (SYMBOL, entable cterm, pkopt, cstopt), loc) end) | SEQUENCE SYMBOL (let val loc = s (SEQUENCEleft, SYMBOLright) val t = (CVar (["Basis"], "sql_sequence"), loc) in (SgiVal (SYMBOL, t), loc) end) | VIEW SYMBOL COLON cexp (let val loc = s (VIEWleft, cexpright) val t = (CVar (["Basis"], "sql_view"), loc) val t = (CApp (t, entable cexp), loc) in (SgiVal (SYMBOL, t), loc) end) | CLASS SYMBOL (let val loc = s (CLASSleft, SYMBOLright) val k = (KArrow ((KType, loc), (KType, loc)), loc) in (SgiClassAbs (SYMBOL, k), loc) end) | CLASS SYMBOL DCOLON kind (let val loc = s (CLASSleft, kindright) in (SgiClassAbs (SYMBOL, kind), loc) end) | CLASS SYMBOL EQ cexp (let val loc = s (CLASSleft, cexpright) in (SgiClass (SYMBOL, (KWild, loc), cexp), loc) end) | CLASS SYMBOL DCOLON kind EQ cexp (let val loc = s (CLASSleft, cexpright) in (SgiClass (SYMBOL, kind, cexp), loc) end) | CLASS SYMBOL SYMBOL EQ cexp (let val loc = s (CLASSleft, cexpright) val k = (KWild, loc) val c = (CAbs (SYMBOL2, SOME k, cexp), loc) in (SgiClass (SYMBOL1, k, c), s (CLASSleft, cexpright)) end) | CLASS SYMBOL LPAREN SYMBOL DCOLON kind RPAREN EQ cexp (let val loc = s (CLASSleft, cexpright) val c = (CAbs (SYMBOL2, SOME kind, cexp), loc) in (SgiClass (SYMBOL1, kind, c), s (CLASSleft, cexpright)) end) | COOKIE SYMBOL COLON cexp (let val loc = s (COOKIEleft, cexpright) val t = (CApp ((CVar (["Basis"], "http_cookie"), loc), entable cexp), loc) in (SgiVal (SYMBOL, t), loc) end) | STYLE SYMBOL (let val loc = s (STYLEleft, SYMBOLright) val t = (CVar (["Basis"], "css_class"), loc) in (SgiVal (SYMBOL, t), loc) end) sgis : ([]) | sgi sgis (sgi :: sgis) str : STRUCT decls END (StrConst decls, s (STRUCTleft, ENDright)) | spath (spath) | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN DARROW str (StrFun (CSYMBOL, sgn, NONE, str), s (FUNCTORleft, strright)) | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn DARROW str (StrFun (CSYMBOL, sgn1, SOME sgn2, str), s (FUNCTORleft, strright)) | spath LPAREN str RPAREN (StrApp (spath, str), s (spathleft, RPARENright)) spath : CSYMBOL (StrVar CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | spath DOT CSYMBOL (StrProj (spath, CSYMBOL), s (spathleft, CSYMBOLright)) kind : TYPE (KType, s (TYPEleft, TYPEright)) | NAME (KName, s (NAMEleft, NAMEright)) | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright)) | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right)) | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright)) | KUNIT (KUnit, s (KUNITleft, KUNITright)) | UNDERUNDER (KWild, s (UNDERUNDERleft, UNDERUNDERright)) | LPAREN ktuple RPAREN (KTuple ktuple, s (LPARENleft, RPARENright)) | CSYMBOL (KVar CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | CSYMBOL KARROW kind (KFun (CSYMBOL, kind), s (CSYMBOLleft, kindright)) ktuple : kind STAR kind ([kind1, kind2]) | kind STAR ktuple (kind :: ktuple) capps : cterm (cterm) | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright)) cexp : capps (capps) | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right)) | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright)) | CSYMBOL KARROW cexp (TKFun (CSYMBOL, cexp), s (CSYMBOLleft, cexpright)) | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right)) | FN cargs DARROW cexp (#1 (cargs (cexp, (KWild, s (FNleft, cexpright))))) | LBRACK cexp TWIDDLE cexp RBRACK DARROW cexp (TDisjoint (cexp1, cexp2, cexp3), s (LBRACKleft, cexp3right)) | CSYMBOL DKARROW cexp (CKAbs (CSYMBOL, cexp), s (CSYMBOLleft, cexpright)) | LPAREN cexp RPAREN DCOLON kind (CAnnot (cexp, kind), s (LPARENleft, kindright)) | UNDER DCOLON kind (CWild kind, s (UNDERleft, UNDERright)) | ctuple (let val loc = s (ctupleleft, ctupleright) in (TRecord (CRecord (ListUtil.mapi (fn (i, c) => ((CName (Int.toString (i + 1)), loc), c)) ctuple), loc), loc) end) kcolon : DCOLON (Explicit) | TCOLON (Implicit) cargs : carg (carg) | cargl (cargl) cargl : cargp cargp (cargp1 o cargp2) | cargp cargl (cargp o cargl) cargl2 : (fn x => x) | cargp cargl2 (cargp o cargl2) carg : SYMBOL DCOLON kind (fn (c, k) => let val loc = s (SYMBOLleft, kindright) in ((CAbs (SYMBOL, SOME kind, c), loc), (KArrow (kind, k), loc)) end) | UNDER DCOLON kind (fn (c, k) => let val loc = s (UNDERleft, kindright) in ((CAbs ("_", SOME kind, c), loc), (KArrow (kind, k), loc)) end) | SYMBOL DCOLONWILD (fn (c, k) => let val loc = s (SYMBOLleft, DCOLONWILDright) val kind = (KWild, loc) in ((CAbs (SYMBOL, NONE, c), loc), (KArrow (kind, k), loc)) end) | UNDER DCOLONWILD (fn (c, k) => let val loc = s (UNDERleft, DCOLONWILDright) val kind = (KWild, loc) in ((CAbs ("_", NONE, c), loc), (KArrow (kind, k), loc)) end) | cargp (cargp) cargp : SYMBOL (fn (c, k) => let val loc = s (SYMBOLleft, SYMBOLright) in ((CAbs (SYMBOL, NONE, c), loc), (KArrow ((KWild, loc), k), loc)) end) | UNDER (fn (c, k) => let val loc = s (UNDERleft, UNDERright) in ((CAbs ("_", NONE, c), loc), (KArrow ((KWild, loc), k), loc)) end) | LPAREN SYMBOL kopt ckl RPAREN (fn (c, k) => let val loc = s (LPARENleft, RPARENright) val ckl = (SYMBOL, kopt) :: ckl val ckl = map (fn (x, ko) => (x, case ko of NONE => (KWild, loc) | SOME k => k)) ckl in case ckl of [(x, k')] => ((CAbs (SYMBOL, SOME k', c), loc), (KArrow (k', k), loc)) | _ => let val k' = (KTuple (map #2 ckl), loc) val c = foldr (fn ((x, k), c) => (CAbs (x, SOME k, c), loc)) c ckl val v = (CVar ([], "$x"), loc) val c = ListUtil.foldli (fn (i, _, c) => (CApp (c, (CProj (v, i + 1), loc)), loc)) c ckl in ((CAbs ("$x", SOME k', c), loc), (KArrow (k', k), loc)) end end) ckl : ([]) | COMMA SYMBOL kopt ckl ((SYMBOL, kopt) :: ckl) path : SYMBOL ([], SYMBOL) | CSYMBOL DOT path (let val (ms, x) = path in (CSYMBOL :: ms, x) end) cpath : CSYMBOL ([], CSYMBOL) | CSYMBOL DOT cpath (let val (ms, x) = cpath in (CSYMBOL :: ms, x) end) mpath : CSYMBOL ([CSYMBOL]) | CSYMBOL DOT mpath (CSYMBOL :: mpath) cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright)) | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright)) | LBRACK rconn RBRACK (CRecord rconn, s (LBRACKleft, RBRACKright)) | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)), s (LBRACEleft, RBRACEright)) | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright)) | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright)) | HASH INT (CName (Int64.toString INT), s (HASHleft, INTright)) | path (CVar path, s (pathleft, pathright)) | path DOT INT (CProj ((CVar path, s (pathleft, pathright)), Int64.toInt INT), s (pathleft, INTright)) | UNDER (CWild (KWild, s (UNDERleft, UNDERright)), s (UNDERleft, UNDERright)) | MAP (CMap, s (MAPleft, MAPright)) | UNIT (CUnit, s (UNITleft, UNITright)) | LPAREN ctuplev RPAREN (CTuple ctuplev, s (LPARENleft, RPARENright)) ctuplev: cexp COMMA cexp ([cexp1, cexp2]) | cexp COMMA ctuplev (cexp :: ctuplev) ctuple : capps STAR capps ([capps1, capps2]) | capps STAR ctuple (capps :: ctuple) rcon : ([]) | ident EQ cexp ([(ident, cexp)]) | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon) rconn : ident ([(ident, (CUnit, s (identleft, identright)))]) | ident COMMA rconn ((ident, (CUnit, s (identleft, identright))) :: rconn) rcone : ([]) | ident COLON cexp ([(ident, cexp)]) | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone) ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | INT (CName (Int64.toString INT), s (INTleft, INTright)) | SYMBOL (CVar ([], SYMBOL), s (SYMBOLleft, SYMBOLright)) eapps : eterm (eterm) | eapps eterm (EApp (eapps, eterm), s (eappsleft, etermright)) | eapps LBRACK cexp RBRACK (ECApp (eapps, cexp), s (eappsleft, RBRACKright)) | eapps BANG (EDisjointApp eapps, s (eappsleft, BANGright)) eexp : eapps (eapps) | FN eargs DARROW eexp (let val loc = s (FNleft, eexpright) in #1 (eargs (eexp, (CWild (KType, loc), loc))) end) | CSYMBOL DKARROW eexp (EKAbs (CSYMBOL, eexp), s (CSYMBOLleft, eexpright)) | eexp COLON cexp (EAnnot (eexp, cexp), s (eexpleft, cexpright)) | eexp MINUSMINUS cexp (ECut (eexp, cexp), s (eexpleft, cexpright)) | eexp MINUSMINUSMINUS cexp (ECutMulti (eexp, cexp), s (eexpleft, cexpright)) | CASE eexp OF barOpt branch branchs (ECase (eexp, branch :: branchs), s (CASEleft, branchsright)) | IF eexp THEN eexp ELSE eexp (let val loc = s (IFleft, eexp3right) in (ECase (eexp1, [((PCon (["Basis"], "True", NONE), loc), eexp2), ((PCon (["Basis"], "False", NONE), loc), eexp3)]), loc) end) | bind SEMI eexp (let val loc = s (bindleft, eexpright) val (v, to, e1) = bind val e = (EVar (["Basis"], "bind", Infer), loc) val e = (EApp (e, e1), loc) in (EApp (e, (EAbs (v, to, eexp), loc)), loc) end) | eexp EQ eexp (native_op ("eq", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp NE eexp (native_op ("ne", eexp1, eexp2, s (eexp1left, eexp2right))) | MINUS eterm (native_unop ("neg", eterm, s (MINUSleft, etermright))) | eexp PLUS eexp (native_op ("plus", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp MINUS eexp (native_op ("minus", eexp1, eexp2, s (eexp1left, eexp2right))) | eapps STAR eexp (native_op ("times", eapps, eexp, s (eappsleft, eexpright))) | eexp DIVIDE eexp (native_op ("divide", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp MOD eexp (native_op ("mod", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp LT eexp (native_op ("lt", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp LE eexp (native_op ("le", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp GT eexp (native_op ("gt", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp GE eexp (native_op ("ge", eexp1, eexp2, s (eexp1left, eexp2right))) | eexp ANDALSO eexp (let val loc = s (eexp1left, eexp2right) in (ECase (eexp1, [((PCon (["Basis"], "True", NONE), loc), eexp2), ((PCon (["Basis"], "False", NONE), loc), (EVar (["Basis"], "False", Infer), loc))]), loc) end) | eexp ORELSE eexp (let val loc = s (eexp1left, eexp2right) in (ECase (eexp1, [((PCon (["Basis"], "True", NONE), loc), (EVar (["Basis"], "True", Infer), loc)), ((PCon (["Basis"], "False", NONE), loc), eexp2)]), loc) end) | eexp PLUSPLUS eexp (EConcat (eexp1, eexp2), s (eexp1left, eexp2right)) | eexp CARET eexp (native_op ("strcat", eexp1, eexp2, s (eexp1left, eexp2right))) | eapps DCOLON eexp (let val loc = s (eappsleft, eexpright) in (EApp ((EVar (["Basis"], "Cons", Infer), loc), (ERecord [((CName "1", loc), eapps), ((CName "2", loc), eexp)], loc)), loc) end) bind : SYMBOL LARROW eapps (SYMBOL, NONE, eapps) | eapps (let val loc = s (eappsleft, eappsright) in ("_", SOME (TRecord (CRecord [], loc), loc), eapps) end) eargs : earg (earg) | eargl (eargl) eargl : eargp eargp (eargp1 o eargp2) | eargp eargl (eargp o eargl) eargl2 : (fn x => x) | eargp eargl2 (eargp o eargl2) earg : patS (fn (e, t) => let val loc = s (patSleft, patSright) val pt = patType loc patS val e' = case #1 patS of PVar x => (EAbs (x, NONE, e), loc) | PAnnot ((PVar x, _), t) => (EAbs (x, SOME t, e), loc) | _ => (EAbs ("$x", SOME pt, (ECase ((EVar ([], "$x", DontInfer), loc), [(patS, e)]), loc)), loc) in (e', (TFun (pt, t), loc)) end) | earga (earga) eargp : pterm (fn (e, t) => let val loc = s (ptermleft, ptermright) val pt = patType loc pterm val e' = case #1 pterm of PVar x => (EAbs (x, NONE, e), loc) | PAnnot ((PVar x, _), t) => (EAbs (x, SOME t, e), loc) | _ => (EAbs ("$x", SOME pt, (ECase ((EVar ([], "$x", DontInfer), loc), [(pterm, e)]), loc)), loc) in (e', (TFun (pt, t), loc)) end) | earga (earga) earga : LBRACK SYMBOL RBRACK (fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) val kind = (KWild, loc) in ((ECAbs (Implicit, SYMBOL, kind, e), loc), (TCFun (Implicit, SYMBOL, kind, t), loc)) end) | LBRACK SYMBOL DCOLONWILD RBRACK (fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) val kind = (KWild, loc) in ((ECAbs (Explicit, SYMBOL, kind, e), loc), (TCFun (Explicit, SYMBOL, kind, t), loc)) end) | LBRACK SYMBOL kcolon kind RBRACK(fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) in ((ECAbs (kcolon, SYMBOL, kind, e), loc), (TCFun (kcolon, SYMBOL, kind, t), loc)) end) | LBRACK SYMBOL TCOLONWILD RBRACK (fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) val kind = (KWild, loc) in ((ECAbs (Implicit, SYMBOL, kind, e), loc), (TCFun (Implicit, SYMBOL, kind, t), loc)) end) | LBRACK cexp TWIDDLE cexp RBRACK(fn (e, t) => let val loc = s (LBRACKleft, RBRACKright) in ((EDisjoint (cexp1, cexp2, e), loc), (TDisjoint (cexp1, cexp2, t), loc)) end) | LBRACK CSYMBOL RBRACK (fn (e, t) => let val loc = s (CSYMBOLleft, CSYMBOLright) in ((EKAbs (CSYMBOL, e), loc), (TKFun (CSYMBOL, t), loc)) end) eterm : LPAREN eexp RPAREN (#1 eexp, s (LPARENleft, RPARENright)) | LPAREN etuple RPAREN (let val loc = s (LPARENleft, RPARENright) in (ERecord (ListUtil.mapi (fn (i, e) => ((CName (Int.toString (i + 1)), loc), e)) etuple), loc) end) | path (EVar (#1 path, #2 path, Infer), s (pathleft, pathright)) | cpath (EVar (#1 cpath, #2 cpath, Infer), s (cpathleft, cpathright)) | AT path (EVar (#1 path, #2 path, TypesOnly), s (ATleft, pathright)) | AT AT path (EVar (#1 path, #2 path, DontInfer), s (AT1left, pathright)) | AT cpath (EVar (#1 cpath, #2 cpath, TypesOnly), s (ATleft, cpathright)) | AT AT cpath (EVar (#1 cpath, #2 cpath, DontInfer), s (AT1left, cpathright)) | LBRACE rexp RBRACE (ERecord rexp, s (LBRACEleft, RBRACEright)) | UNIT (ERecord [], s (UNITleft, UNITright)) | INT (EPrim (Prim.Int INT), s (INTleft, INTright)) | FLOAT (EPrim (Prim.Float FLOAT), s (FLOATleft, FLOATright)) | STRING (EPrim (Prim.String STRING), s (STRINGleft, STRINGright)) | CHAR (EPrim (Prim.Char CHAR), s (CHARleft, CHARright)) | path DOT idents (let val loc = s (pathleft, identsright) in foldl (fn (ident, e) => (EField (e, ident), loc)) (EVar (#1 path, #2 path, Infer), s (pathleft, pathright)) idents end) | LPAREN eexp RPAREN DOT idents (let val loc = s (LPARENleft, identsright) in foldl (fn (ident, e) => (EField (e, ident), loc)) eexp idents end) | AT path DOT idents (let val loc = s (ATleft, identsright) in foldl (fn (ident, e) => (EField (e, ident), loc)) (EVar (#1 path, #2 path, TypesOnly), s (pathleft, pathright)) idents end) | AT AT path DOT idents (let val loc = s (AT1left, identsright) in foldl (fn (ident, e) => (EField (e, ident), loc)) (EVar (#1 path, #2 path, DontInfer), s (pathleft, pathright)) idents end) | XML_BEGIN xml XML_END (let val loc = s (XML_BEGINleft, XML_ENDright) in if XML_BEGIN = "xml" then () else ErrorMsg.errorAt loc "Initial XML tag pair aren't both tagged \"xml\"."; xml end) | XML_BEGIN XML_END (let val loc = s (XML_BEGINleft, XML_ENDright) in if XML_BEGIN = "xml" then () else ErrorMsg.errorAt loc "Initial XML tag pair aren't both tagged \"xml\"."; (EApp ((EVar (["Basis"], "cdata", Infer), loc), (EPrim (Prim.String ""), loc)), loc) end) | XML_BEGIN_END (let val loc = s (XML_BEGIN_ENDleft, XML_BEGIN_ENDright) in if XML_BEGIN_END = "xml" then () else ErrorMsg.errorAt loc "Initial XML tag pair aren't both tagged \"xml\"."; (EApp ((EVar (["Basis"], "cdata", Infer), loc), (EPrim (Prim.String ""), loc)), loc) end) | LPAREN query RPAREN (query) | LPAREN CWHERE sqlexp RPAREN (sqlexp) | LPAREN SQL sqlexp RPAREN (sqlexp) | LPAREN FROM tables RPAREN (#2 tables) | LPAREN SELECT1 query1 RPAREN (query1) | LPAREN INSERT INTO texp LPAREN fields RPAREN VALUES LPAREN sqlexps RPAREN RPAREN (let val loc = s (LPAREN1left, RPAREN3right) val e = (EVar (["Basis"], "insert", Infer), loc) val e = (EApp (e, texp), loc) in if length fields <> length sqlexps then ErrorMsg.errorAt loc ("Length mismatch in INSERT field specification (" ^ Int.toString (length fields) ^ " vs. " ^ Int.toString (length sqlexps) ^ ")") else (); (EApp (e, (ERecord (ListPair.zip (fields, sqlexps)), loc)), loc) end) | LPAREN enterDml UPDATE texp SET fsets CWHERE sqlexp leaveDml RPAREN (let val loc = s (LPARENleft, RPARENright) val e = (EVar (["Basis"], "update", Infer), loc) val e = (ECApp (e, (CWild (KRecord (KType, loc), loc), loc)), loc) val e = (EApp (e, (ERecord fsets, loc)), loc) val e = (EApp (e, texp), loc) in (EApp (e, sqlexp), loc) end) | LPAREN enterDml DELETE FROM texp CWHERE sqlexp leaveDml RPAREN (let val loc = s (LPARENleft, RPARENright) val e = (EVar (["Basis"], "delete", Infer), loc) val e = (EApp (e, texp), loc) in (EApp (e, sqlexp), loc) end) | UNDER (EWild, s (UNDERleft, UNDERright)) | LET edecls IN eexp END (ELet (edecls, eexp), s (LETleft, ENDright)) | LBRACK RBRACK (EVar (["Basis"], "Nil", Infer), s (LBRACKleft, RBRACKright)) edecls : ([]) | edecl edecls (edecl :: edecls) edecl : VAL pat EQ eexp ((EDVal (pat, eexp), s (VALleft, eexpright))) | VAL REC valis ((EDValRec valis, s (VALleft, valisright))) | FUN valis ((EDValRec valis, s (FUNleft, valisright))) enterDml : (inDml := true) leaveDml : (inDml := false) texp : SYMBOL (EVar ([], SYMBOL, Infer), s (SYMBOLleft, SYMBOLright)) | LBRACE LBRACE eexp RBRACE RBRACE (eexp) fields : fident ([fident]) | fident COMMA fields (fident :: fields) sqlexps: sqlexp ([sqlexp]) | sqlexp COMMA sqlexps (sqlexp :: sqlexps) fsets : fident EQ sqlexp ([(fident, sqlexp)]) | fident EQ sqlexp COMMA fsets ((fident, sqlexp) :: fsets) idents : ident ([ident]) | ident DOT idents (ident :: idents) etuple : eexp COMMA eexp ([eexp1, eexp2]) | eexp COMMA etuple (eexp :: etuple) branch : pat DARROW eexp (pat, eexp) branchs: ([]) | BAR branch branchs (branch :: branchs) patS : pterm (pterm) | pterm DCOLON patS (let val loc = s (ptermleft, patSright) in (PCon (["Basis"], "Cons", SOME (PRecord ([("1", pterm), ("2", patS)], false), loc)), loc) end) | patS COLON cexp (PAnnot (patS, cexp), s (patSleft, cexpright)) pat : patS (patS) | cpath pterm (PCon (#1 cpath, #2 cpath, SOME pterm), s (cpathleft, ptermright)) pterm : SYMBOL (PVar SYMBOL, s (SYMBOLleft, SYMBOLright)) | cpath (PCon (#1 cpath, #2 cpath, NONE), s (cpathleft, cpathright)) | UNDER (PWild, s (UNDERleft, UNDERright)) | INT (PPrim (Prim.Int INT), s (INTleft, INTright)) | MINUS INT (PPrim (Prim.Int (~INT)), s (MINUSleft, INTright)) | STRING (PPrim (Prim.String STRING), s (STRINGleft, STRINGright)) | CHAR (PPrim (Prim.Char CHAR), s (CHARleft, CHARright)) | LPAREN pat RPAREN (pat) | LBRACE RBRACE (PRecord ([], false), s (LBRACEleft, RBRACEright)) | UNIT (PRecord ([], false), s (UNITleft, UNITright)) | LBRACE rpat RBRACE (PRecord rpat, s (LBRACEleft, RBRACEright)) | LPAREN ptuple RPAREN (PRecord (ListUtil.mapi (fn (i, p) => (Int.toString (i + 1), p)) ptuple, false), s (LPARENleft, RPARENright)) | LBRACK RBRACK (PCon (["Basis"], "Nil", NONE), s (LBRACKleft, RBRACKright)) rpat : CSYMBOL EQ pat ([(CSYMBOL, pat)], false) | INT EQ pat ([(Int64.toString INT, pat)], false) | DOTDOTDOT ([], true) | CSYMBOL EQ pat COMMA rpat ((CSYMBOL, pat) :: #1 rpat, #2 rpat) | INT EQ pat COMMA rpat ((Int64.toString INT, pat) :: #1 rpat, #2 rpat) ptuple : pat COMMA pat ([pat1, pat2]) | pat COMMA ptuple (pat :: ptuple) rexp : ([]) | ident EQ eexp ([(ident, eexp)]) | ident EQ eexp COMMA rexp ((ident, eexp) :: rexp) xml : xmlOne xml (let val pos = s (xmlOneleft, xmlright) in (EApp ((EApp ( (EVar (["Basis"], "join", Infer), pos), xmlOne), pos), xml), pos) end) | xmlOne (xmlOne) xmlOpt : xml (xml) | (EApp ((EVar (["Basis"], "cdata", Infer), dummy), (EPrim (Prim.String ""), dummy)), dummy) xmlOne : NOTAGS (EApp ((EVar (["Basis"], "cdata", Infer), s (NOTAGSleft, NOTAGSright)), (EPrim (Prim.String NOTAGS), s (NOTAGSleft, NOTAGSright))), s (NOTAGSleft, NOTAGSright)) | tag DIVIDE GT (let val pos = s (tagleft, GTright) val cdata = if #1 (#1 tag) = "submit" orelse #1 (#1 tag) = "dyn" then let val e = (EVar (["Basis"], "cdata", DontInfer), pos) val e = (ECApp (e, (CWild (KWild, pos), pos)), pos) in (ECApp (e, (CRecord [], pos)), pos) end else (EVar (["Basis"], "cdata", Infer), pos) val cdata = (EApp (cdata, (EPrim (Prim.String ""), pos)), pos) in (EApp (#3 tag, cdata), pos) end) | tag GT xmlOpt END_TAG (let val pos = s (tagleft, GTright) val et = tagIn END_TAG in if #1 (#1 tag) = et then if et = "form" then let val e = (EVar (["Basis"], "form", Infer), pos) val e = (EApp (e, case #2 tag of NONE => (EVar (["Basis"], "None", Infer), pos) | SOME c => (EApp ((EVar (["Basis"], "Some", Infer), pos), c), pos)), pos) in (EApp (e, xmlOpt), pos) end else if et = "subform" orelse et = "subforms" then (EApp (#2 (#1 tag), xmlOpt), pos) else if et = "entry" then (EApp ((EVar (["Basis"], "entry", Infer), pos), xmlOpt), pos) else (EApp (#3 tag, xmlOpt), pos) else (if ErrorMsg.anyErrors () then () else ErrorMsg.errorAt pos ("Begin tag <" ^ #1 (#1 tag) ^ "> and end tag </" ^ et ^ "> don't match."); (EWild, pos)) end) | LBRACE eexp RBRACE (eexp) | LBRACE LBRACK eexp RBRACK RBRACE (let val loc = s (LBRACEleft, RBRACEright) val e = (EVar (["Top"], "txt", Infer), loc) in (EApp (e, eexp), loc) end) tag : tagHead attrs (let val pos = s (tagHeadleft, attrsright) val e = (EVar (["Basis"], "tag", Infer), pos) val eo = case #1 attrs of NONE => (EVar (["Basis"], "None", Infer), pos) | SOME e => (EApp ((EVar (["Basis"], "Some", Infer), pos), e), pos) val e = (EApp (e, eo), pos) val e = (EApp (e, (ERecord (#2 attrs), pos)), pos) val e = (EApp (e, (EApp (#2 tagHead, (ERecord [], pos)), pos)), pos) in (tagHead, #1 attrs, e) end) tagHead: BEGIN_TAG (let val bt = tagIn BEGIN_TAG val pos = s (BEGIN_TAGleft, BEGIN_TAGright) in (bt, (EVar (["Basis"], bt, Infer), pos)) end) | tagHead LBRACE cexp RBRACE (#1 tagHead, (ECApp (#2 tagHead, cexp), s (tagHeadleft, RBRACEright))) attrs : (NONE, []) | attr attrs (let val loc = s (attrleft, attrsright) in case attr of Class e => (case #1 attrs of NONE => () | SOME _ => ErrorMsg.errorAt loc "Multiple classes specified for tag"; (SOME e, #2 attrs)) | Normal xe => (#1 attrs, xe :: #2 attrs) end) attr : SYMBOL EQ attrv (if SYMBOL = "class" then Class attrv else let val sym = case SYMBOL of "type" => "Typ" | x => capitalize x in Normal ((CName sym, s (SYMBOLleft, SYMBOLright)), if (sym = "Href" orelse sym = "Src") andalso (case #1 attrv of EPrim _ => true | _ => false) then let val loc = s (attrvleft, attrvright) in (EApp ((EVar (["Basis"], "bless", Infer), loc), attrv), loc) end else attrv) end) attrv : INT (EPrim (Prim.Int INT), s (INTleft, INTright)) | FLOAT (EPrim (Prim.Float FLOAT), s (FLOATleft, FLOATright)) | STRING (EPrim (Prim.String STRING), s (STRINGleft, STRINGright)) | LBRACE eexp RBRACE (eexp) query : query1 obopt lopt ofopt (let val loc = s (query1left, query1right) val re = (ERecord [((CName "Rows", loc), query1), ((CName "OrderBy", loc), obopt), ((CName "Limit", loc), lopt), ((CName "Offset", loc), ofopt)], loc) in (EApp ((EVar (["Basis"], "sql_query", Infer), loc), re), loc) end) dopt : (EVar (["Basis"], "False", Infer), dummy) | DISTINCT (EVar (["Basis"], "True", Infer), s (DISTINCTleft, DISTINCTright)) query1 : SELECT dopt select FROM tables wopt gopt hopt (let val loc = s (SELECTleft, tablesright) val (empties, sel, exps) = case select of Star => ([], map (fn nm => (nm, (CTuple [(CWild (KRecord (KType, loc), loc), loc), (CRecord [], loc)], loc))) (#1 tables), []) | Items sis => let val tabs = map (fn nm => (nm, (CRecord [], loc))) (#1 tables) val (_, tabs, exps) = foldl (amend_select loc) (1, tabs, []) sis val empties = List.mapPartial (fn (nm, (CRecord [], _)) => SOME nm | _ => NONE) tabs in (empties, map (fn (nm, c) => (nm, (CTuple [c, (CWild (KRecord (KType, loc), loc), loc)], loc))) tabs, exps) end val sel = (CRecord sel, loc) val grp = case gopt of NONE => (ECApp ((EVar (["Basis"], "sql_subset_all", Infer), loc), (CWild (KRecord (KRecord (KType, loc), loc), loc), loc)), loc) | SOME gis => let val tabs = map (fn nm => (nm, (CRecord [], loc))) (#1 tables) val tabs = foldl (amend_group loc) tabs gis val tabs = map (fn (nm, c) => (nm, (CTuple [c, (CWild (KRecord (KType, loc), loc), loc)], loc))) tabs in (ECApp ((EVar (["Basis"], "sql_subset", Infer), loc), (CRecord tabs, loc)), loc) end val e = (EVar (["Basis"], "sql_query1", Infer), loc) val e = (ECApp (e, (CRecord (map (fn nm => (nm, (CUnit, loc))) empties), loc)), loc) val re = (ERecord [((CName "Distinct", loc), dopt), ((CName "From", loc), #2 tables), ((CName "Where", loc), wopt), ((CName "GroupBy", loc), grp), ((CName "Having", loc), hopt), ((CName "SelectFields", loc), (ECApp ((EVar (["Basis"], "sql_subset", Infer), loc), sel), loc)), ((CName "SelectExps", loc), (ERecord exps, loc))], loc) val e = (EApp (e, re), loc) in e end) | query1 UNION query1 (sql_relop ("union", false, query11, query12, s (query11left, query12right))) | query1 INTERSECT query1 (sql_relop ("intersect", false, query11, query12, s (query11left, query12right))) | query1 EXCEPT query1 (sql_relop ("except", false, query11, query12, s (query11left, query12right))) | query1 UNION ALL query1 (sql_relop ("union", true, query11, query12, s (query11left, query12right))) | query1 INTERSECT ALL query1 (sql_relop ("intersect", true, query11, query12, s (query11left, query12right))) | query1 EXCEPT ALL query1 (sql_relop ("except", true, query11, query12, s (query11left, query12right))) | LBRACE LBRACE LBRACE eexp RBRACE RBRACE RBRACE (eexp) tables : fitem (fitem) | fitem COMMA tables (let val loc = s (fitemleft, tablesright) val e = (EVar (["Basis"], "sql_from_comma", Infer), loc) val e = (EApp (e, #2 fitem), loc) in (#1 fitem @ #1 tables, (EApp (e, #2 tables), loc)) end) fitem : table' ([#1 table'], #2 table') | LBRACE LBRACE eexp RBRACE RBRACE (tnamesOf eexp, eexp) | fitem JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_inner_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem INNER JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_inner_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem CROSS JOIN fitem (let val loc = s (fitem1left, fitem2right) val e = (EVar (["Basis"], "sql_inner_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) val tru = sql_inject (EVar (["Basis"], "True", Infer), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, tru), loc)) end) | fitem LEFT JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_left_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem LEFT OUTER JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_left_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem RIGHT JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_right_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem RIGHT OUTER JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_right_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem FULL JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_full_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | fitem FULL OUTER JOIN fitem ON sqlexp (let val loc = s (fitem1left, sqlexpright) val e = (EVar (["Basis"], "sql_full_join", Infer), loc) val e = (EApp (e, #2 fitem1), loc) val e = (EApp (e, #2 fitem2), loc) in (#1 fitem1 @ #1 fitem2, (EApp (e, sqlexp), loc)) end) | LPAREN query RPAREN AS tname (let val loc = s (LPARENleft, RPARENright) val e = (EVar (["Basis"], "sql_from_query", Infer), loc) val e = (ECApp (e, tname), loc) in ([tname], (EApp (e, query), loc)) end) tname : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | LBRACE cexp RBRACE (cexp) table : SYMBOL ((CName (capitalize SYMBOL), s (SYMBOLleft, SYMBOLright)), (EVar ([], SYMBOL, Infer), s (SYMBOLleft, SYMBOLright))) | SYMBOL AS tname (tname, (EVar ([], SYMBOL, Infer), s (SYMBOLleft, SYMBOLright))) | LBRACE LBRACE eexp RBRACE RBRACE AS tname (tname, eexp) table' : table (let val loc = s (tableleft, tableright) val e = (EVar (["Basis"], "sql_from_table", Infer), loc) val e = (ECApp (e, #1 table), loc) in (#1 table, (EApp (e, #2 table), loc)) end) tident : SYMBOL (CName (capitalize SYMBOL), s (SYMBOLleft, SYMBOLright)) | CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | LBRACE LBRACE cexp RBRACE RBRACE (cexp) fident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright)) | LBRACE cexp RBRACE (cexp) seli : tident DOT fident (Field (tident, fident)) | sqlexp (Exp (NONE, sqlexp)) | sqlexp AS fident (Exp (SOME fident, sqlexp)) | tident DOT LBRACE LBRACE cexp RBRACE RBRACE (Fields (tident, cexp)) selis : seli ([seli]) | seli COMMA selis (seli :: selis) select : STAR (Star) | selis (Items selis) sqlexp : TRUE (sql_inject (EVar (["Basis"], "True", Infer), s (TRUEleft, TRUEright))) | FALSE (sql_inject (EVar (["Basis"], "False", Infer), s (FALSEleft, FALSEright))) | INT (sql_inject (EPrim (Prim.Int INT), s (INTleft, INTright))) | FLOAT (sql_inject (EPrim (Prim.Float FLOAT), s (FLOATleft, FLOATright))) | STRING (sql_inject (EPrim (Prim.String STRING), s (STRINGleft, STRINGright))) | CURRENT_TIMESTAMP (sql_nfunc ("current_timestamp", s (CURRENT_TIMESTAMPleft, CURRENT_TIMESTAMPright))) | tident DOT fident (let val loc = s (tidentleft, fidentright) val e = (EVar (["Basis"], "sql_field", Infer), loc) val e = (ECApp (e, tident), loc) in (ECApp (e, fident), loc) end) | CSYMBOL (let val loc = s (CSYMBOLleft, CSYMBOLright) in if !inDml then let val e = (EVar (["Basis"], "sql_field", Infer), loc) val e = (ECApp (e, (CName "T", loc)), loc) in (ECApp (e, (CName CSYMBOL, loc)), loc) end else let val e = (EVar (["Basis"], "sql_exp", Infer), loc) in (ECApp (e, (CName CSYMBOL, loc)), loc) end end) | LBRACE eexp RBRACE (eexp) | sqlexp EQ sqlexp (sql_binary ("eq", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp NE sqlexp (sql_binary ("ne", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp LT sqlexp (sql_binary ("lt", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp LE sqlexp (sql_binary ("le", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp GT sqlexp (sql_binary ("gt", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp GE sqlexp (sql_binary ("ge", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp PLUS sqlexp (sql_binary ("plus", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp MINUS sqlexp (sql_binary ("minus", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp STAR sqlexp (sql_binary ("times", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp DIVIDE sqlexp (sql_binary ("div", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp MOD sqlexp (sql_binary ("mod", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp CAND sqlexp (sql_binary ("and", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | sqlexp OR sqlexp (sql_binary ("or", sqlexp1, sqlexp2, s (sqlexp1left, sqlexp2right))) | NOT sqlexp (sql_unary ("not", sqlexp, s (NOTleft, sqlexpright))) | MINUS sqlexp (sql_unary ("neg", sqlexp, s (MINUSleft, sqlexpright))) | sqlexp IS NULL (let val loc = s (sqlexpleft, NULLright) in (EApp ((EVar (["Basis"], "sql_is_null", Infer), loc), sqlexp), loc) end) | LBRACE LBRACK eexp RBRACK RBRACE (sql_inject (#1 eexp, s (LBRACEleft, RBRACEright))) | LPAREN sqlexp RPAREN (sqlexp) | NULL (sql_inject ((EVar (["Basis"], "None", Infer), s (NULLleft, NULLright)))) | COUNT LPAREN STAR RPAREN (let val loc = s (COUNTleft, RPARENright) in (EVar (["Basis"], "sql_count", Infer), loc) end) | COUNT LPAREN sqlexp RPAREN (let val loc = s (COUNTleft, RPARENright) val e = (EVar (["Basis"], "sql_count_col", Infer), loc) val e = (EApp ((EVar (["Basis"], "sql_aggregate", Infer), loc), e), loc) in (EApp (e, sqlexp), loc) end) | sqlagg LPAREN sqlexp RPAREN (let val loc = s (sqlaggleft, RPARENright) val e = (EVar (["Basis"], "sql_" ^ sqlagg, Infer), loc) val e = (EApp ((EVar (["Basis"], "sql_aggregate", Infer), loc), e), loc) in (EApp (e, sqlexp), loc) end) | fname LPAREN sqlexp RPAREN (let val loc = s (fnameleft, RPARENright) val e = (EVar (["Basis"], "sql_ufunc", Infer), loc) val e = (EApp (e, fname), loc) in (EApp (e, sqlexp), loc) end) | LPAREN query RPAREN (let val loc = s (LPARENleft, RPARENright) val e = (EVar (["Basis"], "sql_subquery", Infer), loc) in (EApp (e, query), loc) end) fname : SYMBOL (EVar (["Basis"], "sql_" ^ SYMBOL, Infer), s (SYMBOLleft, SYMBOLright)) | LBRACE eexp RBRACE (eexp) wopt : (sql_inject (EVar (["Basis"], "True", Infer), dummy)) | CWHERE sqlexp (sqlexp) groupi : tident DOT fident (GField (tident, fident)) | tident DOT LBRACE LBRACE cexp RBRACE RBRACE (GFields (tident, cexp)) groupis: groupi ([groupi]) | groupi COMMA groupis (groupi :: groupis) gopt : (NONE) | GROUP BY groupis (SOME groupis) hopt : (sql_inject (EVar (["Basis"], "True", Infer), dummy)) | HAVING sqlexp (sqlexp) obopt : (ECApp ((EVar (["Basis"], "sql_order_by_Nil", Infer), dummy), (CWild (KRecord (KType, dummy), dummy), dummy)), dummy) | ORDER BY obexps (obexps) obitem : sqlexp diropt (sqlexp, diropt) obexps : obitem (let val loc = s (obitemleft, obitemright) val e' = (ECApp ((EVar (["Basis"], "sql_order_by_Nil", Infer), loc), (CWild (KRecord (KType, loc), loc), loc)), loc) val e = (EApp ((EVar (["Basis"], "sql_order_by_Cons", Infer), loc), #1 obitem), loc) val e = (EApp (e, #2 obitem), loc) in (EApp (e, e'), loc) end) | obitem COMMA obexps (let val loc = s (obitemleft, obexpsright) val e = (EApp ((EVar (["Basis"], "sql_order_by_Cons", Infer), loc), #1 obitem), loc) val e = (EApp (e, #2 obitem), loc) in (EApp (e, obexps), loc) end) diropt : (EVar (["Basis"], "sql_asc", Infer), dummy) | ASC (EVar (["Basis"], "sql_asc", Infer), s (ASCleft, ASCright)) | DESC (EVar (["Basis"], "sql_desc", Infer), s (DESCleft, DESCright)) | LBRACE eexp RBRACE (eexp) lopt : (EVar (["Basis"], "sql_no_limit", Infer), dummy) | LIMIT ALL (EVar (["Basis"], "sql_no_limit", Infer), dummy) | LIMIT sqlint (let val loc = s (LIMITleft, sqlintright) in (EApp ((EVar (["Basis"], "sql_limit", Infer), loc), sqlint), loc) end) ofopt : (EVar (["Basis"], "sql_no_offset", Infer), dummy) | OFFSET sqlint (let val loc = s (OFFSETleft, sqlintright) in (EApp ((EVar (["Basis"], "sql_offset", Infer), loc), sqlint), loc) end) sqlint : INT (EPrim (Prim.Int INT), s (INTleft, INTright)) | LBRACE eexp RBRACE (eexp) sqlagg : AVG ("avg") | SUM ("sum") | MIN ("min") | MAX ("max")