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Folding through a functor
author Adam Chlipala <adamc@hcoop.net>
date Thu, 26 Jun 2008 12:35:26 -0400
parents 6431b315a1e3
children b4f2a258e52c
rev   line source
adamc@1 1 (* Copyright (c) 2008, Adam Chlipala
adamc@1 2 * All rights reserved.
adamc@1 3 *
adamc@1 4 * Redistribution and use in source and binary forms, with or without
adamc@1 5 * modification, are permitted provided that the following conditions are met:
adamc@1 6 *
adamc@1 7 * - Redistributions of source code must retain the above copyright notice,
adamc@1 8 * this list of conditions and the following disclaimer.
adamc@1 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@1 10 * this list of conditions and the following disclaimer in the documentation
adamc@1 11 * and/or other materials provided with the distribution.
adamc@1 12 * - The names of contributors may not be used to endorse or promote products
adamc@1 13 * derived from this software without specific prior written permission.
adamc@1 14 *
adamc@1 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@1 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@1 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@1 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@1 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@1 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@1 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@1 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@1 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@1 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@1 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@1 26 *)
adamc@1 27
adamc@1 28 (* Grammar for Laconic/Web programs *)
adamc@1 29
adamc@4 30 open Source
adamc@1 31
adamc@1 32 val s = ErrorMsg.spanOf
adamc@1 33
adamc@1 34 %%
adamc@1 35 %header (functor LacwebLrValsFn(structure Token : TOKEN))
adamc@1 36
adamc@1 37 %term
adamc@1 38 EOF
adamc@14 39 | STRING of string | INT of Int64.int | FLOAT of Real64.real
adamc@1 40 | SYMBOL of string | CSYMBOL of string
adamc@1 41 | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE
adamc@18 42 | EQ | COMMA | COLON | DCOLON | TCOLON | DOT | HASH | UNDER | UNDERUNDER
adamc@67 43 | CON | LTYPE | VAL | FOLD
adamc@7 44 | TYPE | NAME
adamc@1 45 | ARROW | LARROW | DARROW
adamc@1 46 | FN | PLUSPLUS | DOLLAR
adamc@58 47 | STRUCTURE | SIGNATURE | STRUCT | SIG | END | FUNCTOR | WHERE | EXTERN | INCLUDE | OPEN
adamc@1 48
adamc@30 49 %nonterm
adamc@1 50 file of decl list
adamc@1 51 | decls of decl list
adamc@1 52 | decl of decl
adamc@1 53
adamc@30 54 | sgn of sgn
adamc@42 55 | sgntm of sgn
adamc@30 56 | sgi of sgn_item
adamc@30 57 | sgis of sgn_item list
adamc@30 58
adamc@30 59 | str of str
adamc@30 60
adamc@1 61 | kind of kind
adamc@1 62 | kcolon of explicitness
adamc@1 63
adamc@34 64 | path of string list * string
adamc@34 65 | spath of str
adamc@59 66 | mpath of string list
adamc@34 67
adamc@1 68 | cexp of con
adamc@1 69 | capps of con
adamc@1 70 | cterm of con
adamc@1 71 | ident of con
adamc@1 72 | rcon of (con * con) list
adamc@1 73 | rcone of (con * con) list
adamc@1 74
adamc@8 75 | eexp of exp
adamc@8 76 | eapps of exp
adamc@8 77 | eterm of exp
adamc@12 78 | rexp of (con * exp) list
adamc@8 79
adamc@1 80 %verbose (* print summary of errors *)
adamc@1 81 %pos int (* positions *)
adamc@1 82 %start file
adamc@1 83 %pure
adamc@1 84 %eop EOF
adamc@1 85 %noshift EOF
adamc@1 86
adamc@1 87 %name Lacweb
adamc@1 88
adamc@1 89 %nonassoc DARROW
adamc@1 90 %nonassoc COLON
adamc@6 91 %nonassoc DCOLON TCOLON
adamc@1 92 %right COMMA
adamc@1 93 %right ARROW LARROW
adamc@1 94 %right PLUSPLUS
adamc@1 95 %nonassoc DOLLAR
adamc@1 96 %left DOT
adamc@1 97
adamc@1 98 %%
adamc@1 99
adamc@1 100 file : decls (decls)
adamc@54 101 | SIG sgis ([(DSgn ("?", (SgnConst sgis, s (SIGleft, sgisright))),
adamc@54 102 s (SIGleft, sgisright))])
adamc@1 103
adamc@1 104 decls : ([])
adamc@1 105 | decl decls (decl :: decls)
adamc@1 106
adamc@1 107 decl : CON SYMBOL EQ cexp (DCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
adamc@1 108 | CON SYMBOL DCOLON kind EQ cexp (DCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
adamc@7 109 | LTYPE SYMBOL EQ cexp (DCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp),
adamc@7 110 s (LTYPEleft, cexpright))
adamc@8 111 | VAL SYMBOL EQ eexp (DVal (SYMBOL, NONE, eexp), s (VALleft, eexpright))
adamc@8 112 | VAL SYMBOL COLON cexp EQ eexp (DVal (SYMBOL, SOME cexp, eexp), s (VALleft, eexpright))
adamc@1 113
adamc@30 114 | SIGNATURE CSYMBOL EQ sgn (DSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))
adamc@30 115 | STRUCTURE CSYMBOL EQ str (DStr (CSYMBOL, NONE, str), s (STRUCTUREleft, strright))
adamc@30 116 | STRUCTURE CSYMBOL COLON sgn EQ str (DStr (CSYMBOL, SOME sgn, str), s (STRUCTUREleft, strright))
adamc@42 117 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN EQ str
adamc@42 118 (DStr (CSYMBOL1, NONE,
adamc@42 119 (StrFun (CSYMBOL2, sgn1, NONE, str), s (FUNCTORleft, strright))),
adamc@42 120 s (FUNCTORleft, strright))
adamc@42 121 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn EQ str
adamc@42 122 (DStr (CSYMBOL1, NONE,
adamc@42 123 (StrFun (CSYMBOL2, sgn1, SOME sgn2, str), s (FUNCTORleft, strright))),
adamc@42 124 s (FUNCTORleft, strright))
adamc@48 125 | EXTERN STRUCTURE CSYMBOL COLON sgn (DFfiStr (CSYMBOL, sgn), s (EXTERNleft, sgnright))
adamc@61 126 | OPEN mpath (case mpath of
adamc@61 127 [] => raise Fail "Impossible mpath parse [1]"
adamc@61 128 | m :: ms => (DOpen (m, ms), s (OPENleft, mpathright)))
adamc@30 129
adamc@42 130 sgn : sgntm (sgntm)
adamc@40 131 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn
adamc@40 132 (SgnFun (CSYMBOL, sgn1, sgn2), s (FUNCTORleft, sgn2right))
adamc@30 133
adamc@42 134 sgntm : SIG sgis END (SgnConst sgis, s (SIGleft, ENDright))
adamc@59 135 | mpath (case mpath of
adamc@61 136 [] => raise Fail "Impossible mpath parse [2]"
adamc@59 137 | [x] => SgnVar x
adamc@59 138 | m :: ms => SgnProj (m,
adamc@59 139 List.take (ms, length ms - 1),
adamc@59 140 List.nth (ms, length ms - 1)),
adamc@59 141 s (mpathleft, mpathright))
adamc@42 142 | sgntm WHERE CON SYMBOL EQ cexp (SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright))
adamc@42 143 | sgntm WHERE LTYPE SYMBOL EQ cexp(SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright))
adamc@42 144 | LPAREN sgn RPAREN (sgn)
adamc@42 145
adamc@30 146 sgi : CON SYMBOL DCOLON kind (SgiConAbs (SYMBOL, kind), s (CONleft, kindright))
adamc@30 147 | LTYPE SYMBOL (SgiConAbs (SYMBOL, (KType, s (LTYPEleft, SYMBOLright))),
adamc@30 148 s (LTYPEleft, SYMBOLright))
adamc@30 149 | CON SYMBOL EQ cexp (SgiCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
adamc@30 150 | CON SYMBOL DCOLON kind EQ cexp (SgiCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
adamc@30 151 | LTYPE SYMBOL EQ cexp (SgiCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp),
adamc@30 152 s (LTYPEleft, cexpright))
adamc@30 153 | VAL SYMBOL COLON cexp (SgiVal (SYMBOL, cexp), s (VALleft, cexpright))
adamc@30 154
adamc@30 155 | STRUCTURE CSYMBOL COLON sgn (SgiStr (CSYMBOL, sgn), s (STRUCTUREleft, sgnright))
adamc@59 156 | SIGNATURE CSYMBOL EQ sgn (SgiSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))
adamc@42 157 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn
adamc@42 158 (SgiStr (CSYMBOL1,
adamc@42 159 (SgnFun (CSYMBOL2, sgn1, sgn2), s (FUNCTORleft, sgn2right))),
adamc@42 160 s (FUNCTORleft, sgn2right))
adamc@58 161 | INCLUDE sgn (SgiInclude sgn, s (INCLUDEleft, sgnright))
adamc@30 162
adamc@30 163 sgis : ([])
adamc@30 164 | sgi sgis (sgi :: sgis)
adamc@30 165
adamc@30 166 str : STRUCT decls END (StrConst decls, s (STRUCTleft, ENDright))
adamc@34 167 | spath (spath)
adamc@40 168 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN DARROW str
adamc@40 169 (StrFun (CSYMBOL, sgn, NONE, str), s (FUNCTORleft, strright))
adamc@40 170 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn DARROW str
adamc@40 171 (StrFun (CSYMBOL, sgn1, SOME sgn2, str), s (FUNCTORleft, strright))
adamc@44 172 | spath LPAREN str RPAREN (StrApp (spath, str), s (spathleft, RPARENright))
adamc@34 173
adamc@34 174 spath : CSYMBOL (StrVar CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
adamc@34 175 | spath DOT CSYMBOL (StrProj (spath, CSYMBOL), s (spathleft, CSYMBOLright))
adamc@30 176
adamc@1 177 kind : TYPE (KType, s (TYPEleft, TYPEright))
adamc@1 178 | NAME (KName, s (NAMEleft, NAMEright))
adamc@1 179 | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright))
adamc@1 180 | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right))
adamc@1 181 | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright))
adamc@18 182 | UNDERUNDER (KWild, s (UNDERUNDERleft, UNDERUNDERright))
adamc@1 183
adamc@1 184 capps : cterm (cterm)
adamc@1 185 | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright))
adamc@1 186
adamc@1 187 cexp : capps (capps)
adamc@1 188 | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right))
adamc@15 189 | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright))
adamc@1 190
adamc@1 191 | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right))
adamc@1 192
adamc@67 193 | FN SYMBOL DARROW cexp (CAbs (SYMBOL, NONE, cexp), s (FNleft, cexpright))
adamc@67 194 | FN SYMBOL DCOLON kind DARROW cexp (CAbs (SYMBOL, SOME kind, cexp), s (FNleft, cexpright))
adamc@1 195
adamc@8 196 | LPAREN cexp RPAREN DCOLON kind (CAnnot (cexp, kind), s (LPARENleft, kindright))
adamc@6 197
adamc@18 198 | UNDER DCOLON kind (CWild kind, s (UNDERleft, UNDERright))
adamc@18 199
adamc@1 200 kcolon : DCOLON (Explicit)
adamc@1 201 | TCOLON (Implicit)
adamc@1 202
adamc@34 203 path : SYMBOL ([], SYMBOL)
adamc@34 204 | CSYMBOL DOT path (let val (ms, x) = path in (CSYMBOL :: ms, x) end)
adamc@34 205
adamc@59 206 mpath : CSYMBOL ([CSYMBOL])
adamc@59 207 | CSYMBOL DOT mpath (CSYMBOL :: mpath)
adamc@59 208
adamc@1 209 cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright))
adamc@1 210 | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright))
adamc@1 211 | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)),
adamc@1 212 s (LBRACEleft, RBRACEright))
adamc@1 213 | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright))
adamc@1 214 | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright))
adamc@1 215
adamc@34 216 | path (CVar path, s (pathleft, pathright))
adamc@18 217 | UNDER (CWild (KWild, s (UNDERleft, UNDERright)), s (UNDERleft, UNDERright))
adamc@67 218 | FOLD (CFold, s (FOLDleft, FOLDright))
adamc@1 219
adamc@1 220 rcon : ([])
adamc@1 221 | ident EQ cexp ([(ident, cexp)])
adamc@1 222 | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon)
adamc@1 223
adamc@1 224 rcone : ([])
adamc@1 225 | ident COLON cexp ([(ident, cexp)])
adamc@1 226 | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone)
adamc@1 227
adamc@1 228 ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
adamc@34 229 | SYMBOL (CVar ([], SYMBOL), s (SYMBOLleft, SYMBOLright))
adamc@8 230
adamc@8 231 eapps : eterm (eterm)
adamc@8 232 | eapps eterm (EApp (eapps, eterm), s (eappsleft, etermright))
adamc@8 233 | eapps LBRACK cexp RBRACK (ECApp (eapps, cexp), s (eappsleft, RBRACKright))
adamc@8 234
adamc@8 235 eexp : eapps (eapps)
adamc@8 236 | FN SYMBOL kcolon kind DARROW eexp (ECAbs (kcolon, SYMBOL, kind, eexp), s (FNleft, eexpright))
adamc@8 237 | FN SYMBOL COLON cexp DARROW eexp (EAbs (SYMBOL, SOME cexp, eexp), s (FNleft, eexpright))
adamc@8 238 | FN SYMBOL DARROW eexp (EAbs (SYMBOL, NONE, eexp), s (FNleft, eexpright))
adamc@8 239
adamc@8 240 | LPAREN eexp RPAREN DCOLON cexp (EAnnot (eexp, cexp), s (LPARENleft, cexpright))
adamc@12 241 | eterm DOT ident (EField (eterm, ident), s (etermleft, identright))
adamc@8 242
adamc@8 243 eterm : LPAREN eexp RPAREN (#1 eexp, s (LPARENleft, RPARENright))
adamc@8 244
adamc@34 245 | path (EVar path, s (pathleft, pathright))
adamc@12 246 | LBRACE rexp RBRACE (ERecord rexp, s (LBRACEleft, RBRACEright))
adamc@12 247
adamc@14 248 | INT (EPrim (Prim.Int INT), s (INTleft, INTright))
adamc@14 249 | FLOAT (EPrim (Prim.Float FLOAT), s (FLOATleft, FLOATright))
adamc@14 250 | STRING (EPrim (Prim.String STRING), s (STRINGleft, STRINGright))
adamc@14 251
adamc@71 252 | FOLD (EFold, s (FOLDleft, FOLDright))
adamc@71 253
adamc@12 254 rexp : ([])
adamc@12 255 | ident EQ eexp ([(ident, eexp)])
adamc@12 256 | ident EQ eexp COMMA rexp ((ident, eexp) :: rexp)