* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
+open Lexing
open Printf
-type file = stmt list
-and stmt =
- | Let of id * expr
- | Goal of id * id list * pattern list * expr list * code option
+open Utils
+
+module Env = struct
+ include Map.Make (String)
+
+ let merge env env' =
+ List.fold_left (fun env (k, v) -> add k v env) env (bindings env')
+end
+
+type loc = position * position
+let noloc = dummy_pos, dummy_pos
+
+let string_loc () loc =
+ let pos = fst loc in
+ sprintf "%s:%d:%d" pos.pos_fname pos.pos_lnum (pos.pos_cnum - pos.pos_bol)
+let print_loc fp loc =
+ fprintf fp "%s" (string_loc () loc)
+
+type env = expr Env.t
and pattern =
- | PTactic of id * substs list
- | PVarSubst of id
+ | PPred of loc * id * substs list
and expr =
- | ECall of id * expr list
- | EVar of id
- | EString of substs
- | EList of expr list
+ | EGoalDefn of loc * goal
+ | EFuncDefn of loc * func
+ | EPredDefn of loc * pred
+ | ECall of loc * id * expr list
+ | EPredCtor of loc * id * expr list
+ | EVar of loc * id
+ | EList of loc * expr list
+ | ESubsts of loc * substs
+ | EConstant of loc * constant
+and constant =
+ | CString of string
+and goal = param_decl list * pattern list * expr list * code option
+and func = param_decl list * returning * bool * code
+and pred = param_decl list * code
+and param_decl = id
and id = string
-and code = substs
+and code = substs * bool
+and returning = RetExpr | RetStrings | RetString
and substs = subst list
and subst =
| SString of string
| SVar of id
+let getvar env loc name =
+ try Env.find name env
+ with Not_found ->
+ failwithf "%a: variable ‘%s’ not found" string_loc loc name
+
+let getgoal env loc name =
+ let expr =
+ try Env.find name env
+ with Not_found ->
+ failwithf "%a: goal ‘%s’ not found" string_loc loc name in
+ let goal =
+ match expr with
+ | EGoalDefn (loc, goal) -> goal
+ | _ ->
+ failwithf "%a: tried to call ‘%s’ which is not a goal"
+ string_loc loc name in
+ goal
+
+let getfunc env loc name =
+ let expr =
+ try Env.find name env
+ with Not_found ->
+ failwithf "%a: func ‘%s’ not found" string_loc loc name in
+ let func =
+ match expr with
+ | EFuncDefn (loc, func) -> func
+ | _ ->
+ failwithf "%a: tried to call ‘%s’ which is not a function"
+ string_loc loc name in
+ func
+
+let getpred env loc name =
+ assert (String.length name >= 3 && String.sub name 0 3 = "is-");
+ let expr =
+ try Env.find name env
+ with Not_found ->
+ failwithf "%a: predicate ‘%s’ not found" string_loc loc name in
+ let pred =
+ match expr with
+ | EPredDefn (loc, pred) -> pred
+ | _ ->
+ failwithf "%a: tried to call ‘%s’ which is not a predicate"
+ string_loc loc name in
+ pred
+
module Substs = struct
type t = {
mutable elems : subst list; (* built in reverse order *)
f fp x
) xs
-let rec print_file fp file =
- List.iter (print_stmt fp) file
-
-and print_stmt fp = function
- | Let (name, expr) ->
- fprintf fp "let %s = " name;
- print_expr fp expr;
- fprintf fp "\n"
- | Goal (name, params, patterns, exprs, code) ->
- fprintf fp "goal %s (%s) =\n" name (String.concat ", " params);
- fprintf fp " ";
- iter_with_commas fp print_pattern patterns;
- fprintf fp " : ";
- iter_with_commas fp print_expr exprs;
- (match code with
- | None -> ()
- | Some code ->
- fprintf fp " {\n";
- print_code fp code;
- fprintf fp "\n }"
- );
- fprintf fp "\n"
-
-and print_pattern fp = function
- | PTactic (name, params) ->
- fprintf fp "%s (" name;
- iter_with_commas fp print_substs params;
- fprintf fp ")"
- | PVarSubst id -> print_id fp id
-
-and print_expr fp = function
- | ECall (name, params) ->
- fprintf fp "%s (" name;
- iter_with_commas fp print_expr params;
- fprintf fp ")"
- | EVar var -> print_id fp var
- | EString s -> print_substs fp s;
- | EList xs ->
- fprintf fp "[";
- iter_with_commas fp print_expr xs;
- fprintf fp "]"
+let rec string_env () env =
+ let env = Env.bindings env in
+ String.concat "" (List.map (string_def ()) env)
+
+and print_env fp env = output_string fp (string_env () env)
+
+and string_def () (name, expr) =
+ match expr with
+ | EGoalDefn (loc, goal) -> string_goal () (Some name, goal) ^ "\n"
+ | EFuncDefn (loc, func) -> string_func () (Some name, func) ^ "\n"
+ | EPredDefn (loc, pred) -> string_pred () (Some name, pred) ^ "\n"
+ | expr -> sprintf "let %s = %a\n" name string_expr expr;
+
+and print_def fp name expr = output_string fp (string_def () (name, expr))
+
+and string_goal () (name, (param_decls, patterns, exprs, code)) =
+ sprintf "goal%s (%s) = %s : %s%s"
+ (match name with None -> "" | Some name -> " " ^ name)
+ (String.concat ", " (List.map (string_param_decl ()) param_decls))
+ (String.concat ", " (List.map (string_pattern ()) patterns))
+ (String.concat ", " (List.map (string_expr ()) exprs))
+ (match code with None -> ""
+ | Some (code, false) -> " = { ... }"
+ | Some (code, true) -> " = @{ ... }")
+
+and string_func () (name, (param_decls, returning, pure, (code, quiet))) =
+ sprintf "%sfunction%s returning %s (%s) = %s{ ... }"
+ (if pure then "pure " else "")
+ (match name with None -> "" | Some name -> " " ^ name)
+ (match returning with RetExpr -> "expression"
+ | RetString -> "string"
+ | RetStrings -> "strings")
+ (String.concat ", " (List.map (string_param_decl ()) param_decls))
+ (if quiet then "@" else "")
+
+and string_pred () (name, (param_decls, (code, quiet))) =
+ sprintf "predicate%s (%s) = %s{ ... }"
+ (match name with None -> "" | Some name -> " " ^ name)
+ (String.concat ", " (List.map (string_param_decl ()) param_decls))
+ (if quiet then "@" else "")
+
+and string_param_decl () name = name
+
+and string_pattern () = function
+ | PPred (loc, name, params) ->
+ sprintf "%s (%s)" name (String.concat ", "
+ (List.map (string_substs ()) params))
+
+and print_pattern fp p = output_string fp (string_pattern () p)
+
+and string_expr () = function
+ | EGoalDefn (loc, goal) -> string_goal () (None, goal)
+ | EFuncDefn (loc, func) -> string_func () (None, func)
+ | EPredDefn (loc, goal) -> string_pred () (None, goal)
+ | ECall (loc, name, params) ->
+ sprintf "%s (%s)"
+ name (String.concat ", " (List.map (string_expr ()) params))
+ | EPredCtor (loc, name, params) ->
+ sprintf "%s (%s)"
+ name (String.concat ", " (List.map (string_expr ()) params))
+ | EVar (loc, var) -> var
+ | EList (loc, xs) ->
+ sprintf "[%s]" (String.concat ", " (List.map (string_expr ()) xs))
+ | ESubsts (loc, s) -> string_substs () s
+ | EConstant (loc, c) -> string_constant () c
+
+and print_expr fp expr = output_string fp (string_expr () expr)
+
+and string_constant () = function
+ | CString s -> sprintf "%S" s
+
+and print_constant fp c = output_string fp (string_constant () c)
and print_id = output_string
-and print_substs fp xs =
- let xs =
+and string_substs () ss =
+ let ss =
List.map (
function
| SString s -> sprintf "%S" s
| SVar id -> id
- ) xs in
- fprintf fp "%s" (String.concat "+" xs)
+ ) ss in
+ (String.concat "+" ss)
+
+and print_substs fp ss = output_string fp (string_substs () ss)
and print_code fp xs =
List.iter (
git.annexia.org / goals.git / blobdiff