2 (* Dynamic web page generation with Standard ML *)
3 (* Copyright (C) 2003 Adam Chlipala *)
5 (* This library is free software; you can redistribute it and/or *)
6 (* modify it under the terms of the GNU Lesser General Public *)
7 (* License as published by the Free Software Foundation; either *)
8 (* version 2.1 of the License, or (at your option) any later version. *)
10 (* This library is distributed in the hope that it will be useful, *)
11 (* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
12 (* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *)
13 (* Lesser General Public License for more details. *)
15 (* You should have received a copy of the GNU Lesser General Public *)
16 (* License along with this library; if not, write to the Free Software *)
17 (* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *)
19 (* Grammar for ML template language *)
23 fun rcomp ((a, _), (b, _)) = String.compare (a, b) = GREATER
24 fun sortRcs x = ListMergeSort.sort rcomp x
28 fun addNum (_, []) = []
29 | addNum (n, h::t) = (Int.toString n, h)::(addNum(n+1,t))
36 %header (functor MltLrValsFn(structure Token : TOKEN))
42 | AS | WITH | OPEN | VAL | REF | TRY | CATCH
45 | SWITCH | CASE | OF | BAR | ARROW
46 | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE | HASH | SEMI | CONS
47 | PLUS | MINUS | TIMES | DIVIDE | MOD | NEG | DOLLAR | AT | STRCAT
48 | ASN | EQ | NEQ | GT | GTE | LT | LTE
50 | IDENT of string | DOT | DOTDOT | DOTDOTDOT | COMMA | COLON | CARET | TILDE | UNDER
51 | INT of int | STRING of string | CHAR of string | REAL of real
57 | cases of (pat * exp) list
65 | pathList of ident list list
66 | blockItem of blockItem
67 | elseOpt of block option
68 | matches of (pat * block) list withext
72 | rseq of (ident * pat) list
73 | frseq of (ident * pat) list
77 | erseq of (ident * exp) list
79 | ivlist of (ident * exp) list
80 | catch of pat * block
81 | catches of (pat * block) list
83 %verbose (* print summary of errors *)
84 %pos int (* positions *)
94 %nonassoc EQ NEQ GT GTE LT LTE
96 %left TIMES DIVIDE MOD
105 ilist : IDENT ilist (IDENT :: ilist)
108 ivlist : IDENT EQ exp COMMA ivlist ((IDENT, exp) :: ivlist)
109 | IDENT EQ exp ([(IDENT, exp)])
111 catch : pat ARROW block (pat, block)
113 catches : catches BAR catch (catch::catches)
116 blockItem : HTML (BITEM (Html_i HTML, (HTMLleft, HTMLright)))
117 | REF ivlist (BITEM (Ref_i ivlist, (REFleft, ivlistright)))
118 | OPEN pathList (BITEM (Open_i pathList, (OPENleft, pathListright)))
119 | VAL pat EQ exp (BITEM (Val_i (pat, exp), (patleft, expright)))
120 | IDENT ASN exp (BITEM (Assn_i (IDENT, exp), (IDENTleft, expright)))
121 | exp (BITEM (Exp_i exp, (expleft, expright)))
122 | IF exp THEN block elseOpt END
123 (BITEM (Ifthenelse_i(exp, block, elseOpt),
125 | FOREACH IDENT IN exp DO block END
126 (BITEM (Foreach_i (IDENT, exp, block),
127 (FOREACHleft, ENDright)))
128 | FOREACH IDENT IN exp DOTDOT exp DO block END
129 (BITEM (For_i (IDENT, exp1, exp2, block),
130 (FOREACHleft, ENDright)))
131 | SWITCH exp OF matches END
132 (BITEM (Case_i (exp, List.rev (#1 matches)), (SWITCHleft, ENDright)))
133 | TRY block WITH catches END
134 (BITEM (TryCatch_i (block, List.rev catches), (TRYleft, ENDright)))
137 | ELSE block (SOME block)
139 block : blockItem (BLOCK ([blockItem], (blockItemleft, blockItemright)))
140 | blockItem SEMI block (BLOCK (blockItem :: (unblock block), (blockItemleft, blockright)))
141 | blockItem block (BLOCK (blockItem :: (unblock block), (blockItemleft, blockright)))
143 | (BLOCK ([], (0, 0)))
145 appsL : term appsL (term::appsL)
151 foldl (fn (e, a) => EXP (App_e (a, e), (appsLleft, appsLright))) e r
155 path : IDENT DOT path (IDENT::path)
158 pathList: path pathList (path::pathList)
161 eseq : exp COMMA eseq (exp :: eseq)
162 | exp COMMA exp ([exp1, exp2])
168 erseq : IDENT EQ exp COMMA erseq ((IDENT, exp) :: erseq)
169 | IDENT COMMA erseq ((IDENT, EXP (Ident_e [IDENT], (IDENTleft, IDENTright))) :: erseq)
170 | IDENT ([(IDENT, EXP (Ident_e [IDENT], (IDENTleft, IDENTright)))])
171 | IDENT EQ exp ([(IDENT, exp)])
173 pexp : LPAREN eseq RPAREN (EXP (Record_e (true, addNumbers eseq), (LPARENleft, LPARENright)))
174 | LPAREN RPAREN (EXP (Record_e (true, []), (LPARENleft, RPARENright)))
175 | LPAREN exp RPAREN (exp)
177 term : LBRACE erseq RBRACE (EXP (Record_e (false, sortRcs erseq), (LBRACEleft, RBRACEright)))
178 | LBRACE RBRACE (EXP (Record_e (false, []), (LBRACEleft, RBRACEright)))
179 | LBRACE term WITH erseq RBRACE (EXP (RecordUpd_e (term, erseq), (LBRACEleft, RBRACEright)))
181 | STRING (EXP (String_e STRING, (STRINGleft, STRINGright)))
182 | CHAR (EXP (Char_e CHAR, (CHARleft, CHARright)))
183 | REAL (EXP (Real_e REAL, (REALleft, REALright)))
184 | path (EXP (Ident_e path, (pathleft, pathright)))
185 | INT (EXP (Int_e INT, (INTleft, INTright)))
186 | NEG (EXP (Neg_e, (NEGleft, NEGright)))
187 | DOLLAR (EXP (Param_e, (DOLLARleft, DOLLARright)))
188 | AT IDENT (EXP (Template_e IDENT, (ATleft, IDENTright)))
189 | HASH INT (EXP (Proj_e (Int.toString INT), (HASHleft, INTright)))
190 | HASH IDENT (EXP (Proj_e IDENT, (HASHleft, IDENTright)))
191 | LBRACK elseq RBRACK (foldr (fn x => EXP (Cons_e x, (LBRACKleft, RBRACKright)))
192 (EXP (Ident_e ["nil"], (0, 0))) elseq)
195 | exp PLUS exp (EXP (Plus_e (exp1, exp2), (exp1left, exp2right)))
196 | exp MINUS exp (EXP (Minus_e (exp1, exp2), (exp1left, exp2right)))
197 | exp TIMES exp (EXP (Times_e (exp1, exp2), (exp1left, exp2right)))
198 | exp DIVIDE exp (EXP (Divide_e (exp1, exp2), (exp1left, exp2right)))
199 | exp MOD exp (EXP (Mod_e (exp1, exp2), (exp1left, exp2right)))
200 | exp EQ exp (EXP (Eq_e (exp1, exp2), (exp1left, exp2right)))
201 | exp NEQ exp (EXP (Neq_e (exp1, exp2), (exp1left, exp2right)))
202 | exp LT exp (EXP (Lt_e (exp1, exp2), (exp1left, exp2right)))
203 | exp LTE exp (EXP (Lte_e (exp1, exp2), (exp1left, exp2right)))
204 | exp GT exp (EXP (Gt_e (exp1, exp2), (exp1left, exp2right)))
205 | exp GTE exp (EXP (Gte_e (exp1, exp2), (exp1left, exp2right)))
206 | exp CONS exp (EXP (Cons_e (exp1, exp2), (exp1left, exp2right)))
207 | exp STRCAT exp (EXP (StrCat_e (exp1, exp2), (exp1left, exp2right)))
208 | exp ORELSE exp (EXP (Orelse_e (exp1, exp2), (exp1left, exp2right)))
209 | exp ANDALSO exp (EXP (Andalso_e (exp1, exp2), (exp1left, exp2right)))
210 | CASE exp OF cases (EXP (Case_e (exp, List.rev cases), (expleft, casesright)))
211 | FN cases (EXP (Fn_e (List.rev cases), (FNleft, casesright)))
212 | RAISE exp (EXP (Raise_e exp, (RAISEleft, expright)))
215 cases : pat ARROW exp ([(pat, exp)])
216 | cases BAR pat ARROW exp ((pat, exp) :: cases)
218 matches : matches BAR pat ARROW block (((pat, block) :: (#1 matches), (matchesleft, blockright)))
219 | pat ARROW block ([(pat, block)], (patleft, blockright))
221 rseq : IDENT EQ pat COMMA rseq ((IDENT, pat) :: rseq)
222 | IDENT COMMA rseq ((IDENT, PAT (Ident_p [IDENT], (IDENTleft, IDENTright))) :: rseq)
223 | IDENT ([(IDENT, PAT (Ident_p [IDENT], (IDENTleft, IDENTright)))])
224 | IDENT EQ pat ([(IDENT, pat)])
226 frseq : IDENT EQ pat COMMA frseq ((IDENT, pat) :: frseq)
227 | IDENT COMMA frseq ((IDENT, PAT (Ident_p [IDENT], (IDENTleft, IDENTright))) :: frseq)
230 ppat : LPAREN pat RPAREN (PAT (unpat pat, (LPARENleft, RPARENright)))
231 | LPAREN pseq RPAREN (PAT (Record_p (true, addNumbers pseq), (LPARENleft, LPARENright)))
232 | LPAREN RPAREN (PAT (Record_p (true, []), (LPARENleft, RPARENright)))
234 pseq : pat COMMA pseq (pat :: pseq)
235 | pat COMMA pat ([pat1, pat2])
241 pterm : path (PAT (Ident_p path, (pathleft, pathright)))
242 | UNDER (PAT (Wild_p, (UNDERleft, UNDERright)))
243 | INT (PAT (Int_p INT, (INTleft, INTright)))
244 | STRING (PAT (String_p STRING, (STRINGleft, STRINGright)))
245 | CHAR (PAT (Char_p CHAR, (CHARleft, CHARright)))
246 | REAL (PAT (Real_p REAL, (REALleft, REALright)))
247 | LBRACE rseq RBRACE (PAT (Record_p (false, sortRcs rseq), (LBRACEleft, RBRACEright)))
248 | LBRACE RBRACE (PAT (Record_p (false, []), (LBRACEleft, RBRACEright)))
249 | LBRACE frseq RBRACE (PAT (FlexRecord_p (sortRcs frseq), (LBRACEleft, RBRACEright)))
252 papp : path papp (PAT (App_p (path, papp), (pathleft, pappright)))
255 pat : papp CONS papp (PAT (Cons_p (papp1, papp2), (papp1left, papp2right)))
257 | IDENT AS pat (PAT (As_p (IDENT, pat), (IDENTleft, patright)))
258 | LBRACK plseq RBRACK (foldr (fn x => PAT (Cons_p x, (LBRACKleft, RBRACKright)))
259 (PAT (Ident_p ["nil"], (0, 0))) plseq)