src/env.sig

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* Domtool type-checking and reduction environments *)
  20
  21 signature ENV = sig
  22
  23     type typeRule = Ast.exp -> bool
  24     val registerType : string * typeRule -> unit
  25     val typeRule : string -> typeRule option
  26
  27     type env_vars = Ast.exp Ast.StringMap.map
  28     type action = env_vars * Ast.exp list -> env_vars
  29     val registerAction : string * action -> unit
  30     val action : string -> action option
  31
  32     val registerContainer : string * action * (unit -> unit) -> unit
  33     val container : string -> (action * (unit -> unit)) option
  34
  35     (* Actions to take before and after evaluating a file *)
  36     val registerPre : (unit -> unit) -> unit
  37     val pre : unit -> unit
  38     val registerPost : (unit -> unit) -> unit
  39     val post : unit -> unit
  40
  41     (* ...and before type-checking *)
  42     val registerPreTycheck : (unit -> unit) -> unit
  43     val preTycheck : unit -> unit
  44
  45     val badArgs : string * Ast.exp list -> 'a
  46     val badArg : string * string * Ast.exp -> 'a
  47
  48     type 'a arg = Ast.exp -> 'a option
  49
  50     val int : int arg
  51     val string : string arg
  52     val list : 'a arg -> 'a list arg
  53
  54     val none : string -> (unit -> unit) -> action
  55     val one : string -> string * 'a arg -> ('a -> unit) -> action
  56     val two : string -> string * 'a arg * string * 'b arg -> ('a * 'b -> unit) -> action
  57
  58     val oneV : string -> string * 'a arg -> (env_vars * 'a -> unit) -> action
  59     val twoV : string -> string * 'a arg * string * 'b arg -> (env_vars * 'a * 'b -> unit) -> action
  60
  61     val env : 'a arg -> env_vars * string -> 'a
  62
  63     val type_one : string -> 'a arg -> ('a -> bool) -> unit
  64
  65     val action_none : string -> (unit -> unit) -> unit
  66     val action_one : string -> string * 'a arg -> ('a -> unit) -> unit
  67     val action_two : string -> string * 'a arg * string * 'b arg -> ('a * 'b -> unit) -> unit
  68
  69     val actionV_none : string -> (env_vars -> unit) -> unit
  70     val actionV_one : string -> string * 'a arg -> (env_vars * 'a -> unit) -> unit
  71     val actionV_two : string -> string * 'a arg * string * 'b arg -> (env_vars * 'a * 'b -> unit) -> unit
  72
  73     val container_none : string -> (unit -> unit) * (unit -> unit) -> unit
  74     val container_one : string -> string * 'a arg -> ('a -> unit) * (unit -> unit) -> unit
  75
  76     val containerV_one : string -> string * 'a arg -> (env_vars * 'a -> unit) * (unit -> unit) -> unit
  77
  78     type env
  79     val empty : env
  80
  81     val bindType : env -> string -> env
  82     val bindVal : env -> string * Ast.typ * Ast.exp option -> env
  83     val bindContext : env -> string -> env
  84
  85     val lookupType : env -> string -> bool
  86     val lookupVal : env -> string -> Ast.typ option
  87     val lookupEquation : env -> string -> Ast.exp option
  88     val lookupContext : env -> string -> bool
  89
  90     val types : env -> Ast.StringSet.set
  91     val vals : env -> Ast.StringSet.set
  92     val contexts : env -> Ast.StringSet.set
  93 end