* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
+open Printf
+
open Utils
let rec to_constant env = function
failwithf "%a: list found where constant expression expected"
Ast.string_loc loc
- | ECallGoal (loc, name, _) ->
- failwithf "%a: cannot use goal ‘%s’ in constant expression"
- Ast.string_loc loc name
+ | ECall (loc, name, args) ->
+ let expr = Ast.getvar env loc name in
+ (match expr with
+ | EGoalDefn _ ->
+ (* Goals don't return anything so they cannot be used in
+ * constant expressions. Use a function instead.
+ *)
+ failwithf "%a: cannot use goal call ‘%s’ in shell expansion"
+ Ast.string_loc loc name
+
+ | EFuncDefn (loc, func) ->
+ to_constant env (call_function env loc name args func)
+
+ | _ ->
+ failwithf "%a: cannot use ‘%s’ in constant expression"
+ Ast.string_loc loc name
+ )
| ETacticCtor (loc, name, _) ->
failwithf "%a: cannot use tactic ‘%s’ in constant expression"
failwithf "%a: cannot use goal in constant expression"
Ast.string_loc loc
+ | EFuncDefn (loc, _) ->
+ failwithf "%a: cannot use function in constant expression"
+ Ast.string_loc loc
+
| ETacticDefn (loc, _) ->
failwithf "%a: cannot use tactic in constant expression"
Ast.string_loc loc
) substs;
Buffer.contents b
-let rec to_shell_script env loc substs =
+and to_shell_script env loc substs =
let b = Buffer.create 13 in
List.iter (
function
(* These are shell quoted so we can just concat them with space. *)
String.concat " " strs
- | ECallGoal (loc, name, _) ->
- failwithf "%a: cannot use goal ‘%s’ in shell expansion"
- Ast.string_loc loc name
+ | ECall (loc, name, args) ->
+ let expr = Ast.getvar env loc name in
+ (match expr with
+ | EGoalDefn _ ->
+ (* Goals don't return anything so they cannot be used in
+ * shell script expansions. Use a function instead.
+ *)
+ failwithf "%a: cannot use goal call ‘%s’ in shell expansion"
+ Ast.string_loc loc name
+
+ | EFuncDefn (loc, func) ->
+ expr_to_shell_string env (call_function env loc name args func)
+
+ | _ ->
+ failwithf "%a: cannot call ‘%s’ which is not a function"
+ Ast.string_loc loc name
+ )
(* Tactics expand to the first parameter. *)
| ETacticCtor (loc, _, []) -> Filename.quote ""
failwithf "%a: cannot use goal in shell expansion"
Ast.string_loc loc
+ | EFuncDefn (loc, _) ->
+ failwithf "%a: cannot use function in shell expansion"
+ Ast.string_loc loc
+
| ETacticDefn (loc, _) ->
failwithf "%a: cannot use tactic in shell expansion"
Ast.string_loc loc
-let rec evaluate_goal_arg env = function
+and evaluate_goal_arg env = function
| Ast.EVar (loc, name) ->
let expr = Ast.getvar env loc name in
evaluate_goal_arg env expr
| ETacticCtor (loc, name, exprs) ->
Ast.ETacticCtor (loc, name, List.map (evaluate_goal_arg env) exprs)
- | ECallGoal (loc, name, _) ->
- (* Goals don't return anything so they cannot be used in
- * goal args. Use a function instead.
- *)
- failwithf "%a: cannot use goal ‘%s’ in goal argument"
- Ast.string_loc loc name
+ | ECall (loc, name, args) ->
+ let expr = Ast.getvar env loc name in
+ (match expr with
+ | EGoalDefn _ ->
+ (* Goals don't return anything so they cannot be used in
+ * goal args. Use a function instead.
+ *)
+ failwithf "%a: cannot use goal call ‘%s’ in goal argument"
+ Ast.string_loc loc name
+
+ | EFuncDefn (loc, func) ->
+ call_function env loc name args func
+
+ | _ ->
+ failwithf "%a: cannot call ‘%s’ which is not a function"
+ Ast.string_loc loc name
+ )
| EConstant _
| EGoalDefn _
+ | EFuncDefn _
| ETacticDefn _ as e -> e
+
+(* Functions are only called from goal args or when substituting
+ * into a shell script or constant expression (this may change if we
+ * implement ‘:=’ assignment for variables). This evaluates a
+ * function by running the associated shell script and substituting
+ * the output into an EList.
+ *
+ * XXX In future allow functions to be annotated with a return type.
+ *)
+and call_function env loc name args (params, code) =
+ (* This is used to print the function in debug and error messages only. *)
+ let debug_func =
+ sprintf "%s (%s)" name
+ (String.concat ", " (List.map (Ast.string_expr ()) args)) in
+ Cmdline.debug "%a: running function %s" Ast.string_loc loc debug_func;
+
+ (* Evaluate function args. Must be done before updating the environment. *)
+ let args = List.map (evaluate_goal_arg env) args in
+
+ (* Create a new environment which maps the parameter names to
+ * the args.
+ *)
+ let env =
+ let params =
+ try List.combine params args
+ with Invalid_argument _ ->
+ failwithf "%a: calling function %s with wrong number of arguments, expecting %d args but got %d args"
+ Ast.string_loc loc debug_func
+ (List.length params) (List.length args) in
+ List.fold_left (fun env (k, v) -> Ast.Env.add k v env) env params in
+
+ (* Run the code. *)
+ let code = to_shell_script env loc code in
+ let code = "set -e\n" (*^ "set -x\n"*) ^ "\n" ^ code in
+
+ let chan = Unix.open_process_in code in
+ let lines = ref [] in
+ (try while true do lines := input_line chan :: !lines done
+ with End_of_file -> ());
+ let lines = List.rev !lines in
+ let st = Unix.close_process_in chan in
+ (match st with
+ | Unix.WEXITED 0 -> ()
+ | Unix.WEXITED i ->
+ eprintf "*** function ‘%s’ failed with exit code %d\n" name i
+ | Unix.WSIGNALED i ->
+ eprintf "*** function ‘%s’ killed by signal %d\n" name i
+ | Unix.WSTOPPED i ->
+ eprintf "*** function ‘%s’ stopped by signal %d\n" name i
+ );
+
+ Ast.EList (Ast.noloc,
+ (List.map (fun line ->
+ Ast.EConstant (Ast.noloc, Ast.CString line))
+ lines))
git.annexia.org / goals.git / blobdiff