53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
|
/*
|
||
|
|
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
|
||
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
||
|
|
|
||
|
|
Author: Leonardo de Moura
|
||
|
|
*/
|
||
|
|
#include "library/tactic/elaborate.h"
|
||
|
|
#include "library/tactic/expr_to_tactic.h"
|
||
|
|
|
||
|
|
namespace lean {
|
||
|
|
LEAN_THREAD_PTR(proof_state const, g_info_proof_state);
|
||
|
|
|
||
|
|
optional<proof_state> get_info_tactic_proof_state() {
|
||
|
|
if (g_info_proof_state) {
|
||
|
|
return some_proof_state(*g_info_proof_state);
|
||
|
|
} else {
|
||
|
|
return none_proof_state();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void set_info_tactic_proof_state(proof_state const * ps) {
|
||
|
|
g_info_proof_state = ps;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct scoped_info_tactic_proof_state {
|
||
|
|
scoped_info_tactic_proof_state(proof_state const & s) {
|
||
|
|
set_info_tactic_proof_state(&s);
|
||
|
|
}
|
||
|
|
~scoped_info_tactic_proof_state() {
|
||
|
|
set_info_tactic_proof_state(nullptr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
tactic mk_info_tactic(elaborate_fn const & fn, expr const & e) {
|
||
|
|
return tactic1([=](environment const &, io_state const &, proof_state const & ps) -> proof_state {
|
||
|
|
// create dummy variable just to communicate position to the elaborator
|
||
|
|
expr dummy = mk_sort(mk_level_zero(), e.get_tag());
|
||
|
|
scoped_info_tactic_proof_state scope(ps);
|
||
|
|
fn(goal(), name_generator("dummy"), dummy);
|
||
|
|
return ps;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
void initialize_info_tactic() {
|
||
|
|
register_tac(name({"tactic", "info"}),
|
||
|
|
[](type_checker &, elaborate_fn const & fn, expr const & e, pos_info_provider const *) {
|
||
|
|
return mk_info_tactic(fn, e);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
void finalize_info_tactic() {
|
||
|
|
}
|
||
|
|
}
|