2 * Copyright (C) 2019 Richard W.M. Jones
3 * Copyright (C) 2019 Red Hat Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 let rec evaluate_targets env exprs =
23 List.iter (evaluate_target env) exprs
25 and evaluate_target env = function
26 | Ast.EGoal _ -> assert false
29 | Ast.ECall (loc, name, args) ->
30 let goal = Ast.getgoal env loc name in
31 run_goal env loc name args goal
33 | Ast.ETactic (loc, name, args) ->
34 (* All parameters of tactics must be simple expressions (strings,
35 * in future booleans, numbers, etc).
37 let args = List.map (Ast.to_constant env) args in
38 run_tactic env loc name args
40 (* Look up the variable and substitute it. *)
41 | Ast.EVar (loc, name) ->
42 let expr = Ast.getvar env loc name in
43 evaluate_target env expr
45 (* Lists are inlined when found as a target. *)
46 | Ast.EList (loc, exprs) ->
47 evaluate_targets env exprs
49 (* A string (with or without substitutions) implies *file(filename). *)
50 | Ast.ESubsts (loc, str) ->
51 let str = Ast.substitute env loc str in
52 run_tactic env loc "file" [Ast.CString str]
54 | Ast.EConstant (loc, c) ->
55 run_tactic env loc "file" [c]
57 (* Run a goal by name. *)
58 and run_goal env loc name args (params, patterns, deps, code) =
59 (* Create a new environment which maps the parameter names to
64 try List.combine params args
65 with Invalid_argument _ ->
66 failwithf "%a: calling goal ā%sā with wrong number of arguments"
67 Ast.string_loc loc name in
68 List.fold_left (fun env (k, v) -> Ast.Env.add k v env) env params in
70 (* Check all dependencies have been updated. *)
71 evaluate_targets env deps;
73 (* Check if any target (ie. pattern) needs to be rebuilt. *)
75 List.exists (needs_rebuild env loc name deps) patterns in
78 (* Run the code (if any). *)
82 let code = Ast.substitute env loc code in
83 Printf.printf "running : %s\n" code
86 (* Check all targets were updated (else it's an error). *)
87 let pattern_still_needs_rebuild =
88 try Some (List.find (needs_rebuild env loc name deps) patterns)
89 with Not_found -> None in
90 match pattern_still_needs_rebuild with
93 failwithf "%a: goal ā%sā ran successfully but it did not rebuild %a"
96 Ast.string_pattern pattern
99 (* Return whether the target (pattern) needs to be rebuilt. *)
100 and needs_rebuild env loc name deps pattern =
103 (* Find the goal which matches the given tactic and run it.
104 * const_args is a list of parameters (all constants).
106 and run_tactic env loc tactic const_args =
107 (* Search across all goals for a matching tactic. *)
109 let env = Ast.Env.bindings env in
111 (function (name, Ast.EGoal (loc, goal)) -> Some (name, goal) | _ -> None)
114 (* If there are multiple goals matching, this must choose
115 * the most recently defined (XXX).
119 (fun (_, (_, patterns, _, _)) ->
120 List.exists (matching_pattern env loc tactic const_args) patterns)
125 Ast.ETactic (loc, tactic,
126 List.map (fun c -> Ast.EConstant (loc, c))
128 failwithf "%a: don't know how to build %a"
129 Ast.string_loc loc Ast.string_expr tactic in
131 let args = [] (* XXX calculate free variables *) in
132 run_goal env loc name args goal
134 (* XXX This only does exact matches at the moment. *)
135 and matching_pattern env loc tactic const_args = function
136 | Ast.PTactic (loc, constructor, params)
137 when tactic = constructor &&
138 List.length const_args = List.length params ->
139 (* Try to simplify the parameters of this pattern down
140 * to constants, but don't fail here if we can't do this.
143 let params = List.map (Ast.substitute env loc) params in
144 let params = List.map (fun s -> Ast.CString s) params in
146 with Failure _ -> false
149 | Ast.PTactic _ -> false
151 | Ast.PVar (loc, name) -> assert false (* not implemented *)