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Monoizing FFI transactions correctly
author Adam Chlipala <adamc@hcoop.net>
date Thu, 06 Nov 2008 09:21:34 -0500
parents 222cbc1da232
children f542bc3133dc
rev   line source
adamc@56 1 type int
adamc@56 2 type float
adamc@56 3 type string
adamc@436 4 type time
adamc@91 5
adamc@119 6 type unit = {}
adamc@119 7
adamc@186 8 datatype bool = False | True
adamc@186 9
adamc@288 10 datatype option t = None | Some of t
adamc@284 11
adamc@91 12
adamc@256 13 (** Basic type classes *)
adamc@256 14
adamc@256 15 class eq
adamc@256 16 val eq : t ::: Type -> eq t -> t -> t -> bool
adamc@257 17 val ne : t ::: Type -> eq t -> t -> t -> bool
adamc@256 18 val eq_int : eq int
adamc@394 19 val eq_float : eq float
adamc@256 20 val eq_string : eq string
adamc@256 21 val eq_bool : eq bool
adamc@437 22 val eq_time : eq time
adamc@422 23 val mkEq : t ::: Type -> (t -> t -> bool) -> eq t
adamc@256 24
adamc@389 25 class num
adamc@417 26 val zero : t ::: Type -> num t -> t
adamc@389 27 val neg : t ::: Type -> num t -> t -> t
adamc@389 28 val plus : t ::: Type -> num t -> t -> t -> t
adamc@389 29 val minus : t ::: Type -> num t -> t -> t -> t
adamc@389 30 val times : t ::: Type -> num t -> t -> t -> t
adamc@389 31 val div : t ::: Type -> num t -> t -> t -> t
adamc@389 32 val mod : t ::: Type -> num t -> t -> t -> t
adamc@389 33 val num_int : num int
adamc@390 34 val num_float : num float
adamc@389 35
adamc@391 36 class ord
adamc@391 37 val lt : t ::: Type -> ord t -> t -> t -> bool
adamc@391 38 val le : t ::: Type -> ord t -> t -> t -> bool
adamc@391 39 val gt : t ::: Type -> ord t -> t -> t -> bool
adamc@391 40 val ge : t ::: Type -> ord t -> t -> t -> bool
adamc@391 41 val ord_int : ord int
adamc@394 42 val ord_float : ord float
adamc@394 43 val ord_string : ord string
adamc@394 44 val ord_bool : ord bool
adamc@437 45 val ord_time : ord time
adamc@391 46
adamc@256 47
adamc@283 48 (** String operations *)
adamc@283 49
adamc@283 50 val strcat : string -> string -> string
adamc@283 51
adamc@286 52 class show
adamc@286 53 val show : t ::: Type -> show t -> t -> string
adamc@286 54 val show_int : show int
adamc@286 55 val show_float : show float
adamc@286 56 val show_string : show string
adamc@286 57 val show_bool : show bool
adamc@436 58 val show_time : show time
adamc@452 59 val mkShow : t ::: Type -> (t -> string) -> show t
adamc@286 60
adamc@290 61 class read
adamc@290 62 val read : t ::: Type -> read t -> string -> option t
adamc@292 63 val readError : t ::: Type -> read t -> string -> t
adamc@292 64 (* [readError] calls [error] if the input is malformed. *)
adamc@290 65 val read_int : read int
adamc@290 66 val read_float : read float
adamc@290 67 val read_string : read string
adamc@290 68 val read_bool : read bool
adamc@436 69 val read_time : read time
adamc@288 70
adamc@283 71
adamc@456 72 (** * Transactions *)
adamc@456 73
adamc@456 74 con transaction :: Type -> Type
adamc@456 75
adamc@456 76 val return : t ::: Type
adamc@456 77 -> t -> transaction t
adamc@456 78 val bind : t1 ::: Type -> t2 ::: Type
adamc@456 79 -> transaction t1 -> (t1 -> transaction t2)
adamc@456 80 -> transaction t2
adamc@456 81
adamc@456 82
adamc@456 83 (** HTTP operations *)
adamc@456 84
adamc@456 85 val requestHeader : string -> transaction (option string)
adamc@456 86
adamc@456 87
adamc@203 88 (** SQL *)
adamc@203 89
adamc@203 90 con sql_table :: {Type} -> Type
adamc@203 91
adamc@204 92 (*** Queries *)
adamc@204 93
adamc@233 94 con sql_query :: {{Type}} -> {Type} -> Type
adamc@233 95 con sql_query1 :: {{Type}} -> {{Type}} -> {Type} -> Type
adamc@234 96 con sql_exp :: {{Type}} -> {{Type}} -> {Type} -> Type -> Type
adamc@204 97
adamc@223 98 con sql_subset :: {{Type}} -> {{Type}} -> Type
adamc@223 99 val sql_subset : keep_drop :: {({Type} * {Type})}
adamc@354 100 -> sql_subset
adamc@354 101 (fold (fn nm (fields :: ({Type} * {Type}))
adamc@354 102 acc [[nm] ~ acc]
adamc@354 103 [fields.1 ~ fields.2] =>
adamc@354 104 [nm = fields.1 ++ fields.2]
adamc@354 105 ++ acc) [] keep_drop)
adamc@354 106 (fold (fn nm (fields :: ({Type} * {Type}))
adamc@354 107 acc [[nm] ~ acc] =>
adamc@354 108 [nm = fields.1] ++ acc)
adamc@354 109 [] keep_drop)
adamc@354 110 val sql_subset_all : tables :: {{Type}} -> sql_subset tables tables
adamc@223 111
adamc@229 112 val sql_query1 : tables ::: {{Type}}
adamc@354 113 -> grouped ::: {{Type}}
adamc@354 114 -> selectedFields ::: {{Type}}
adamc@354 115 -> selectedExps ::: {Type}
adamc@354 116 -> {From : $(fold (fn nm (fields :: {Type}) acc [[nm] ~ acc] =>
adamc@354 117 [nm = sql_table fields] ++ acc)
adamc@354 118 [] tables),
adamc@354 119 Where : sql_exp tables [] [] bool,
adamc@354 120 GroupBy : sql_subset tables grouped,
adamc@354 121 Having : sql_exp grouped tables [] bool,
adamc@354 122 SelectFields : sql_subset grouped selectedFields,
adamc@354 123 SelectExps : $(fold (fn nm (t :: Type) acc [[nm] ~ acc] =>
adamc@354 124 [nm = sql_exp grouped tables [] t]
adamc@354 125 ++ acc) [] selectedExps) }
adamc@354 126 -> sql_query1 tables selectedFields selectedExps
adamc@229 127
adamc@229 128 type sql_relop
adamc@229 129 val sql_union : sql_relop
adamc@229 130 val sql_intersect : sql_relop
adamc@229 131 val sql_except : sql_relop
adamc@260 132 val sql_relop : tables1 ::: {{Type}}
adamc@354 133 -> tables2 ::: {{Type}}
adamc@354 134 -> selectedFields ::: {{Type}}
adamc@354 135 -> selectedExps ::: {Type}
adamc@354 136 -> sql_relop
adamc@354 137 -> sql_query1 tables1 selectedFields selectedExps
adamc@354 138 -> sql_query1 tables2 selectedFields selectedExps
adamc@354 139 -> sql_query1 selectedFields selectedFields selectedExps
adamc@229 140
adamc@230 141 type sql_direction
adamc@230 142 val sql_asc : sql_direction
adamc@230 143 val sql_desc : sql_direction
adamc@230 144
adamc@234 145 con sql_order_by :: {{Type}} -> {Type} -> Type
adamc@234 146 val sql_order_by_Nil : tables ::: {{Type}} -> exps :: {Type} -> sql_order_by tables exps
adamc@234 147 val sql_order_by_Cons : tables ::: {{Type}} -> exps ::: {Type} -> t ::: Type
adamc@354 148 -> sql_exp tables [] exps t -> sql_direction
adamc@354 149 -> sql_order_by tables exps
adamc@354 150 -> sql_order_by tables exps
adamc@230 151
adamc@231 152 type sql_limit
adamc@231 153 val sql_no_limit : sql_limit
adamc@231 154 val sql_limit : int -> sql_limit
adamc@354 155
adamc@232 156 type sql_offset
adamc@232 157 val sql_no_offset : sql_offset
adamc@232 158 val sql_offset : int -> sql_offset
adamc@232 159
adamc@229 160 val sql_query : tables ::: {{Type}}
adamc@354 161 -> selectedFields ::: {{Type}}
adamc@354 162 -> selectedExps ::: {Type}
adamc@354 163 -> {Rows : sql_query1 tables selectedFields selectedExps,
adamc@354 164 OrderBy : sql_order_by tables selectedExps,
adamc@354 165 Limit : sql_limit,
adamc@354 166 Offset : sql_offset}
adamc@354 167 -> sql_query selectedFields selectedExps
adamc@204 168
adamc@354 169 val sql_field : otherTabs ::: {{Type}} -> otherFields ::: {Type}
adamc@354 170 -> fieldType ::: Type -> agg ::: {{Type}}
adamc@354 171 -> exps ::: {Type}
adamc@354 172 -> tab :: Name -> field :: Name
adamc@354 173 -> sql_exp
adamc@354 174 ([tab = [field = fieldType] ++ otherFields] ++ otherTabs)
adamc@354 175 agg exps fieldType
adamc@234 176
adamc@354 177 val sql_exp : tabs ::: {{Type}} -> agg ::: {{Type}} -> t ::: Type -> rest ::: {Type}
adamc@354 178 -> nm :: Name
adamc@354 179 -> sql_exp tabs agg ([nm = t] ++ rest) t
adamc@209 180
adamc@221 181 class sql_injectable
adamc@221 182 val sql_bool : sql_injectable bool
adamc@221 183 val sql_int : sql_injectable int
adamc@221 184 val sql_float : sql_injectable float
adamc@221 185 val sql_string : sql_injectable string
adamc@437 186 val sql_time : sql_injectable time
adamc@354 187 val sql_inject : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@354 188 -> t ::: Type
adamc@354 189 -> sql_injectable t -> t -> sql_exp tables agg exps t
adamc@209 190
adamc@220 191 con sql_unary :: Type -> Type -> Type
adamc@220 192 val sql_not : sql_unary bool bool
adamc@354 193 val sql_unary : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@354 194 -> arg ::: Type -> res ::: Type
adamc@354 195 -> sql_unary arg res -> sql_exp tables agg exps arg
adamc@354 196 -> sql_exp tables agg exps res
adamc@220 197
adamc@220 198 con sql_binary :: Type -> Type -> Type -> Type
adamc@220 199 val sql_and : sql_binary bool bool bool
adamc@220 200 val sql_or : sql_binary bool bool bool
adamc@234 201 val sql_binary : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@354 202 -> arg1 ::: Type -> arg2 ::: Type -> res ::: Type
adamc@354 203 -> sql_binary arg1 arg2 res -> sql_exp tables agg exps arg1
adamc@354 204 -> sql_exp tables agg exps arg2
adamc@354 205 -> sql_exp tables agg exps res
adamc@220 206
adamc@219 207 type sql_comparison
adamc@219 208 val sql_eq : sql_comparison
adamc@219 209 val sql_ne : sql_comparison
adamc@219 210 val sql_lt : sql_comparison
adamc@219 211 val sql_le : sql_comparison
adamc@219 212 val sql_gt : sql_comparison
adamc@219 213 val sql_ge : sql_comparison
adamc@253 214 val sql_comparison : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@236 215 -> t ::: Type
adamc@253 216 -> sql_comparison
adamc@234 217 -> sql_exp tables agg exps t -> sql_exp tables agg exps t
adamc@234 218 -> sql_exp tables agg exps bool
adamc@203 219
adamc@235 220 val sql_count : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@354 221 -> unit -> sql_exp tables agg exps int
adamc@235 222
adamc@236 223 con sql_aggregate :: Type -> Type
adamc@354 224 val sql_aggregate : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@354 225 -> t ::: Type
adamc@354 226 -> sql_aggregate t -> sql_exp agg agg exps t
adamc@354 227 -> sql_exp tables agg exps t
adamc@236 228
adamc@236 229 class sql_summable
adamc@236 230 val sql_summable_int : sql_summable int
adamc@236 231 val sql_summable_float : sql_summable float
adamc@236 232 val sql_avg : t ::: Type -> sql_summable t -> sql_aggregate t
adamc@236 233 val sql_sum : t ::: Type -> sql_summable t -> sql_aggregate t
adamc@236 234
adamc@236 235 class sql_maxable
adamc@236 236 val sql_maxable_int : sql_maxable int
adamc@236 237 val sql_maxable_float : sql_maxable float
adamc@236 238 val sql_maxable_string : sql_maxable string
adamc@437 239 val sql_maxable_time : sql_maxable time
adamc@236 240 val sql_max : t ::: Type -> sql_maxable t -> sql_aggregate t
adamc@236 241 val sql_min : t ::: Type -> sql_maxable t -> sql_aggregate t
adamc@236 242
adamc@441 243 con sql_nfunc :: Type -> Type
adamc@441 244 val sql_nfunc : tables ::: {{Type}} -> agg ::: {{Type}} -> exps ::: {Type}
adamc@441 245 -> t ::: Type
adamc@441 246 -> sql_nfunc t -> sql_exp tables agg exps t
adamc@441 247 val sql_current_timestamp : sql_nfunc time
adamc@441 248
adamc@235 249
adamc@243 250 (*** Executing queries *)
adamc@243 251
adamc@354 252 val query : tables ::: {{Type}} -> exps ::: {Type}
adamc@354 253 -> fn [tables ~ exps] =>
adamc@354 254 state ::: Type
adamc@354 255 -> sql_query tables exps
adamc@356 256 -> ($(exps ++ fold (fn nm (fields :: {Type}) acc [[nm] ~ acc] =>
adamc@354 257 [nm = $fields] ++ acc) [] tables)
adamc@354 258 -> state
adamc@354 259 -> transaction state)
adamc@354 260 -> state
adamc@354 261 -> transaction state
adamc@243 262
adamc@243 263
adamc@299 264 (*** Database mutators *)
adamc@299 265
adamc@299 266 type dml
adamc@299 267 val dml : dml -> transaction unit
adamc@299 268
adamc@299 269 val insert : fields ::: {Type}
adamc@354 270 -> sql_table fields
adamc@354 271 -> $(fold (fn nm (t :: Type) acc [[nm] ~ acc] =>
adamc@354 272 [nm = sql_exp [] [] [] t] ++ acc)
adamc@354 273 [] fields)
adamc@354 274 -> dml
adamc@299 275
adamc@403 276 val update : unchanged ::: {Type} -> changed :: {Type} ->
adamc@354 277 fn [changed ~ unchanged] =>
adamc@354 278 $(fold (fn nm (t :: Type) acc [[nm] ~ acc] =>
adamc@354 279 [nm = sql_exp [T = changed ++ unchanged] [] [] t]
adamc@354 280 ++ acc)
adamc@354 281 [] changed)
adamc@354 282 -> sql_table (changed ++ unchanged)
adamc@354 283 -> sql_exp [T = changed ++ unchanged] [] [] bool
adamc@354 284 -> dml
adamc@299 285
adamc@299 286 val delete : fields ::: {Type}
adamc@354 287 -> sql_table fields
adamc@354 288 -> sql_exp [T = fields] [] [] bool
adamc@354 289 -> dml
adamc@299 290
adamc@338 291 (*** Sequences *)
adamc@338 292
adamc@338 293 type sql_sequence
adamc@338 294 val nextval : sql_sequence -> transaction int
adamc@338 295
adamc@299 296
adamc@203 297 (** XML *)
adamc@203 298
adamc@139 299 con tag :: {Type} -> {Unit} -> {Unit} -> {Type} -> {Type} -> Type
adamc@91 300
adamc@91 301
adamc@139 302 con xml :: {Unit} -> {Type} -> {Type} -> Type
adamc@141 303 val cdata : ctx ::: {Unit} -> use ::: {Type} -> string -> xml ctx use []
adamc@354 304 val tag : attrsGiven ::: {Type} -> attrsAbsent ::: {Type}
adamc@354 305 -> ctxOuter ::: {Unit} -> ctxInner ::: {Unit}
adamc@354 306 -> useOuter ::: {Type} -> useInner ::: {Type}
adamc@354 307 -> bindOuter ::: {Type} -> bindInner ::: {Type}
adamc@354 308 -> fn [attrsGiven ~ attrsAbsent]
adamc@354 309 [useOuter ~ useInner]
adamc@354 310 [bindOuter ~ bindInner] =>
adamc@354 311 $attrsGiven
adamc@354 312 -> tag (attrsGiven ++ attrsAbsent)
adamc@354 313 ctxOuter ctxInner useOuter bindOuter
adamc@354 314 -> xml ctxInner useInner bindInner
adamc@354 315 -> xml ctxOuter (useOuter ++ useInner) (bindOuter ++ bindInner)
adamc@140 316 val join : ctx ::: {Unit}
adamc@139 317 -> use1 ::: {Type} -> bind1 ::: {Type} -> bind2 ::: {Type}
adamc@354 318 -> fn [use1 ~ bind1] [bind1 ~ bind2] =>
adamc@354 319 xml ctx use1 bind1
adamc@354 320 -> xml ctx (use1 ++ bind1) bind2
adamc@354 321 -> xml ctx use1 (bind1 ++ bind2)
adamc@354 322 val useMore : ctx ::: {Unit} -> use1 ::: {Type} -> use2 ::: {Type}
adamc@354 323 -> bind ::: {Type}
adamc@354 324 -> fn [use1 ~ use2] =>
adamc@354 325 xml ctx use1 bind
adamc@354 326 -> xml ctx (use1 ++ use2) bind
adamc@91 327
adamc@110 328 con xhtml = xml [Html]
adamc@139 329 con page = xhtml [] []
adamc@325 330 con xbody = xml [Body] [] []
adamc@326 331 con xtr = xml [Body, Tr] [] []
adamc@361 332 con xform = xml [Body, Form] [] []
adamc@110 333
adamc@204 334 (*** HTML details *)
adamc@204 335
adamc@140 336 con html = [Html]
adamc@140 337 con head = [Head]
adamc@140 338 con body = [Body]
adamc@361 339 con form = [Body, Form]
adamc@332 340 con tabl = [Body, Table]
adamc@332 341 con tr = [Body, Tr]
adamc@93 342
adamc@140 343 val head : unit -> tag [] html head [] []
adamc@140 344 val title : unit -> tag [] head [] [] []
adamc@110 345
adamc@140 346 val body : unit -> tag [] html body [] []
adamc@354 347 con bodyTag = fn (attrs :: {Type}) =>
adamc@354 348 ctx ::: {Unit} ->
adamc@354 349 fn [[Body] ~ ctx] =>
adamc@354 350 unit -> tag attrs ([Body] ++ ctx) ([Body] ++ ctx) [] []
adamc@354 351 con bodyTagStandalone = fn (attrs :: {Type}) =>
adamc@354 352 ctx ::: {Unit}
adamc@354 353 -> fn [[Body] ~ ctx] =>
adamc@354 354 unit -> tag attrs ([Body] ++ ctx) [] [] []
adamc@141 355
adamc@141 356 val br : bodyTagStandalone []
adamc@119 357
adamc@140 358 val p : bodyTag []
adamc@140 359 val b : bodyTag []
adamc@140 360 val i : bodyTag []
adamc@407 361 val tt : bodyTag []
adamc@140 362 val font : bodyTag [Size = int, Face = string]
adamc@140 363
adamc@140 364 val h1 : bodyTag []
adamc@443 365 val h2 : bodyTag []
adamc@443 366 val h3 : bodyTag []
adamc@443 367 val h4 : bodyTag []
adamc@140 368 val li : bodyTag []
adamc@140 369
adamc@410 370 val hr : bodyTag []
adamc@410 371
adamc@280 372 val a : bodyTag [Link = transaction page]
adamc@140 373
adamc@361 374 val form : ctx ::: {Unit} -> bind ::: {Type}
adamc@354 375 -> fn [[Body] ~ ctx] =>
adamc@354 376 xml form [] bind
adamc@354 377 -> xml ([Body] ++ ctx) [] []
adamc@361 378 con formTag = fn (ty :: Type) (inner :: {Unit}) (attrs :: {Type}) =>
adamc@354 379 ctx ::: {Unit}
adamc@361 380 -> fn [[Form] ~ ctx] =>
adamc@354 381 nm :: Name -> unit
adamc@361 382 -> tag attrs ([Form] ++ ctx) inner [] [nm = ty]
adamc@444 383 val textbox : formTag string [] [Value = string, Size = int]
adamc@444 384 val password : formTag string [] [Value = string, Size = int]
adamc@444 385 val textarea : formTag string [] [Rows = int, Cols = int]
adamc@153 386
adamc@361 387 val checkbox : formTag bool [] [Checked = bool]
adamc@190 388
adamc@153 389 con radio = [Body, Radio]
adamc@361 390 val radio : formTag string radio []
adamc@153 391 val radioOption : unit -> tag [Value = string] radio [] [] []
adamc@142 392
adamc@154 393 con select = [Select]
adamc@361 394 val select : formTag string select []
adamc@422 395 val option : unit -> tag [Value = string, Selected = bool] select [] [] []
adamc@154 396
adamc@354 397 val submit : ctx ::: {Unit} -> use ::: {Type}
adamc@361 398 -> fn [[Form] ~ ctx] =>
adamc@354 399 unit
adamc@406 400 -> tag [Value = string, Action = $use -> transaction page]
adamc@361 401 ([Form] ++ ctx) ([Form] ++ ctx) use []
adamc@283 402
adamc@325 403 (*** Tables *)
adamc@325 404
adamc@406 405 val tabl : other ::: {Unit} -> fn [other ~ [Body, Table]] =>
adamc@406 406 unit -> tag [Border = int] ([Body] ++ other) ([Body, Table] ++ other) [] []
adamc@406 407 val tr : other ::: {Unit} -> fn [other ~ [Body, Table, Tr]] =>
adamc@406 408 unit -> tag [] ([Body, Table] ++ other) ([Body, Tr] ++ other) [] []
adamc@406 409 val th : other ::: {Unit} -> fn [other ~ [Body, Tr]] =>
adamc@406 410 unit -> tag [] ([Body, Tr] ++ other) ([Body] ++ other) [] []
adamc@406 411 val td : other ::: {Unit} -> fn [other ~ [Body, Tr]] =>
adamc@406 412 unit -> tag [] ([Body, Tr] ++ other) ([Body] ++ other) [] []
adamc@325 413
adamc@283 414
adamc@283 415 (** Aborting *)
adamc@283 416
adamc@283 417 val error : t ::: Type -> xml [Body] [] [] -> t