class_instance_context(environment const & env, io_state const & ios,
name const & prefix, bool relax, bool use_local_instances):
m_ios(ios),
m_ngen(prefix),
m_relax(relax),
m_use_local_instances(use_local_instances) {
m_fname = nullptr;
m_trace_instances = get_class_trace_instances(ios.get_options());
m_max_depth = get_class_instance_max_depth(ios.get_options());
m_conservative = get_class_conservative(ios.get_options());
if (m_conservative)
m_tc = mk_type_checker(env, m_ngen.mk_child(), false, UnfoldReducible);
else
m_tc = mk_type_checker(env, m_ngen.mk_child(), m_relax);
options opts = m_ios.get_options();
opts = opts.update_if_undef(get_pp_purify_metavars_name(), false);
opts = opts.update_if_undef(get_pp_implicit_name(), true);
m_ios.set_options(opts);
}
elaborator_context::elaborator_context(environment const & env, io_state const & ios, local_decls<level> const & lls,
pos_info_provider const * pp, info_manager * info, bool check_unassigned):
m_env(env), m_ios(ios), m_lls(lls), m_pos_provider(pp), m_info_manager(info), m_check_unassigned(check_unassigned) {
m_use_local_instances = get_elaborator_local_instances(ios.get_options());
m_ignore_instances = get_elaborator_ignore_instances(ios.get_options());
m_flycheck_goals = get_elaborator_flycheck_goals(ios.get_options());
m_fail_missing_field = get_elaborator_fail_missing_field(ios.get_options());
m_lift_coercions = get_elaborator_lift_coercions(ios.get_options());
init_options(ios.get_options());
}
scope_trace_env::scope_trace_env(environment const & env, io_state const & ios) {
m_enable_sz = get_enabled_trace_classes().size();
m_disable_sz = get_disabled_trace_classes().size();
m_old_env = g_env;
m_old_ios = g_ios;
g_env = const_cast<environment*>(&env);
g_ios = const_cast<io_state*>(&ios);
options const & opts = ios.get_options();
name trace("trace");
opts.for_each([&](name const & n) {
if (is_prefix_of(trace, n)) {
name cls = n.replace_prefix(trace, name());
if (opts.get_bool(n, false))
enable_trace_class(cls);
else
disable_trace_class(cls);
}
});
}
server::worker::worker(environment const & env, io_state const & ios, definition_cache & cache, optional<std::string> const & base_dir):
m_empty_snapshot(env, ios.get_options()),
m_cache(cache),
m_base_dir(base_dir),
m_todo_line_num(0),
m_todo_options(ios.get_options()),
m_terminate(false),
m_thread([=]() {
io_state _ios(ios);
while (!m_terminate) {
file_ptr todo_file;
unsigned todo_line_num = 0;
options todo_options;
// wait for next task
while (!m_terminate) {
unique_lock<mutex> lk(m_todo_mutex);
if (m_todo_file) {
todo_file = m_todo_file;
todo_line_num = m_todo_line_num;
todo_options = m_todo_options;
break;
} else {
m_todo_cv.wait(lk);
}
}
// extract block of code and snapshot from todo_file
reset_interrupt();
bool worker_interrupted = false;
if (m_terminate)
break;
DIAG(std::cerr << "processing '" << todo_file->get_fname() << "'\n";)
std::string block;
unsigned num_lines;
snapshot s;
{
lean_assert(todo_file);
lock_guard<mutex> lk(todo_file->m_lines_mutex);
unsigned i = todo_file->find(todo_line_num);
todo_file->m_snapshots.resize(i);
s = i == 0 ? m_empty_snapshot : todo_file->m_snapshots[i-1];
if (direct_imports_have_changed(s.m_env))
s = m_empty_snapshot;
lean_assert(s.m_line > 0);
todo_file->m_info.start_from(s.m_line);
todo_file->m_info.save_environment_options(s.m_line, 0, s.m_env, s.m_options);
num_lines = todo_file->copy_to(block, s.m_line - 1);
}
if (m_terminate)
break;
// parse block of code with respect to snapshot
try {
std::istringstream strm(block);
#if defined(LEAN_SERVER_DIAGNOSTIC)
std::shared_ptr<output_channel> out1(new stderr_channel());
std::shared_ptr<output_channel> out2(new stderr_channel());
#else
std::shared_ptr<output_channel> out1(new string_output_channel());
std::shared_ptr<output_channel> out2(new string_output_channel());
#endif
io_state tmp_ios(_ios, out1, out2);
tmp_ios.set_options(join(s.m_options, _ios.get_options()));
bool use_exceptions = false;
unsigned num_threads = 1;
parser p(s.m_env, tmp_ios, strm, todo_file->m_fname.c_str(), m_base_dir,
use_exceptions, num_threads,
&s, &todo_file->m_snapshots, &todo_file->m_info);
p.set_cache(&m_cache);
p();
} catch (interrupted &) {
worker_interrupted = true;
} catch (throwable & ex) {
DIAG(std::cerr << "worker exception: " << ex.what() << "\n";)
}
if (!m_terminate && !worker_interrupted) {
DIAG(std::cerr << "finished '" << todo_file->get_fname() << "'\n";)
unique_lock<mutex> lk(m_todo_mutex);
if (m_todo_file == todo_file && m_last_file == todo_file && m_todo_line_num == todo_line_num) {
m_todo_line_num = num_lines + 1;
m_todo_file = nullptr;
m_todo_cv.notify_all();
}
}
static proof_state_seq apply_tactic_core(environment const & env, io_state const & ios, proof_state const & s,
expr const & _e, buffer<constraint> & cs,
add_meta_kind add_meta, subgoals_action_kind subgoals_action,
optional<unifier_kind> const & uk = optional<unifier_kind>()) {
goals const & gs = s.get_goals();
if (empty(gs)) {
throw_no_goal_if_enabled(s);
return proof_state_seq();
}
bool class_inst = get_apply_class_instance(ios.get_options());
name_generator ngen = s.get_ngen();
std::shared_ptr<type_checker> tc(mk_type_checker(env, ngen.mk_child()));
goal g = head(gs);
goals tail_gs = tail(gs);
expr t = g.get_type();
expr e = _e;
auto e_t_cs = tc->infer(e);
e_t_cs.second.linearize(cs);
expr e_t = e_t_cs.first;
buffer<expr> metas;
local_context ctx;
bool initialized_ctx = false;
unifier_config cfg(ios.get_options());
if (uk)
cfg.m_kind = *uk;
if (add_meta != DoNotAdd) {
unsigned num_e_t = get_expect_num_args(*tc, e_t);
if (add_meta == AddDiff) {
unsigned num_t = get_expect_num_args(*tc, t);
if (num_t <= num_e_t)
num_e_t -= num_t;
else
num_e_t = 0;
} else {
lean_assert(add_meta == AddAll);
}
for (unsigned i = 0; i < num_e_t; i++) {
auto e_t_cs = tc->whnf(e_t);
e_t_cs.second.linearize(cs);
e_t = e_t_cs.first;
expr meta;
if (class_inst && binding_info(e_t).is_inst_implicit()) {
if (!initialized_ctx) {
ctx = g.to_local_context();
initialized_ctx = true;
}
bool use_local_insts = true;
bool is_strict = false;
auto mc = mk_class_instance_elaborator(
env, ios, ctx, ngen.next(), optional<name>(),
use_local_insts, is_strict,
some_expr(head_beta_reduce(binding_domain(e_t))), e.get_tag(), cfg, nullptr);
meta = mc.first;
cs.push_back(mc.second);
} else {
meta = g.mk_meta(ngen.next(), head_beta_reduce(binding_domain(e_t)));
}
e = mk_app(e, meta);
e_t = instantiate(binding_body(e_t), meta);
metas.push_back(meta);
}
}
metavar_closure cls(t);
cls.mk_constraints(s.get_subst(), justification());
pair<bool, constraint_seq> dcs = tc->is_def_eq(t, e_t);
if (!dcs.first) {
throw_tactic_exception_if_enabled(s, [=](formatter const & fmt) {
format r = format("invalid 'apply' tactic, failed to unify");
r += pp_indent_expr(fmt, t);
r += compose(line(), format("with"));
r += pp_indent_expr(fmt, e_t);
return r;
});
return proof_state_seq();
}
dcs.second.linearize(cs);
unify_result_seq rseq = unify(env, cs.size(), cs.data(), ngen.mk_child(), s.get_subst(), cfg);
list<expr> meta_lst = to_list(metas.begin(), metas.end());
return map2<proof_state>(rseq, [=](pair<substitution, constraints> const & p) -> proof_state {
substitution const & subst = p.first;
constraints const & postponed = p.second;
name_generator new_ngen(ngen);
substitution new_subst = subst;
expr new_e = new_subst.instantiate_all(e);
assign(new_subst, g, new_e);
goals new_gs = tail_gs;
if (subgoals_action != IgnoreSubgoals) {
buffer<expr> metas;
for (auto m : meta_lst) {
if (!new_subst.is_assigned(get_app_fn(m)))
metas.push_back(m);
}
if (subgoals_action == AddRevSubgoals) {
for (unsigned i = 0; i < metas.size(); i++)
new_gs = cons(goal(metas[i], new_subst.instantiate_all(tc->infer(metas[i]).first)), new_gs);
} else {
lean_assert(subgoals_action == AddSubgoals || subgoals_action == AddAllSubgoals);
if (subgoals_action == AddSubgoals)
remove_redundant_metas(metas);
unsigned i = metas.size();
while (i > 0) {
--i;
new_gs = cons(goal(metas[i], new_subst.instantiate_all(tc->infer(metas[i]).first)), new_gs);
}
}
}
return proof_state(s, new_gs, new_subst, new_ngen, postponed);
});
}
elaborator_context::elaborator_context(environment const & env, io_state const & ios, local_decls<level> const & lls,
pos_info_provider const * pp, info_manager * info, bool check_unassigned):
m_env(env), m_ios(ios), m_lls(lls), m_pos_provider(pp), m_info_manager(info), m_check_unassigned(check_unassigned) {
m_use_local_instances = get_elaborator_local_instances(ios.get_options());
}