52 lines
2.1 KiB
C++
52 lines
2.1 KiB
C++
/*
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Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include <string>
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#include "library/constants.h"
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#include "library/reducible.h"
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#include "library/flycheck.h"
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#include "library/tactic/expr_to_tactic.h"
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namespace lean {
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tactic check_expr_tactic(elaborate_fn const & elab, expr const & e,
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std::string const & fname, pair<unsigned, unsigned> const & pos) {
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return tactic01([=](environment const & env, io_state const & ios, proof_state const & s) {
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goals const & gs = s.get_goals();
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if (empty(gs)) {
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throw_no_goal_if_enabled(s);
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return none_proof_state();
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}
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goal const & g = head(gs);
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name_generator ngen = s.get_ngen();
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expr new_e = std::get<0>(elab(g, ngen.mk_child(), e, none_expr(), s.get_subst(), false));
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auto tc = mk_type_checker(env, ngen.mk_child());
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expr new_t = tc->infer(new_e).first;
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auto out = regular(env, ios);
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flycheck_information info(out);
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if (info.enabled()) {
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out << fname << ":" << pos.first << ":" << pos.second << ": information: ";
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out << "check result:\n";
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}
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out << new_e << " : " << new_t << endl;
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return some_proof_state(s);
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});
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}
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void initialize_check_expr_tactic() {
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register_tac(get_tactic_check_expr_name(),
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[](type_checker &, elaborate_fn const & fn, expr const & e, pos_info_provider const * p) {
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check_tactic_expr(app_arg(e), "invalid 'check_expr' tactic, invalid argument");
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expr arg = get_tactic_expr_expr(app_arg(e));
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if (p) {
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if (auto it = p->get_pos_info(e))
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return check_expr_tactic(fn, arg, std::string(p->get_file_name()), *it);
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}
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return check_expr_tactic(fn, arg, "<unknown file>", mk_pair(0, 0));
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});
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}
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void finalize_check_expr_tactic() {
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}
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}
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