94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/*
|
|
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
|
|
Author: Leonardo de Moura
|
|
*/
|
|
#include <utility>
|
|
#include <string>
|
|
#include "util/hash.h"
|
|
#include "library/private.h"
|
|
#include "library/module.h"
|
|
#include "library/kernel_bindings.h"
|
|
|
|
namespace lean {
|
|
struct private_ext : public environment_extension {
|
|
unsigned m_counter;
|
|
rb_map<name, name, name_quick_cmp> m_inv_map; // map: hidden-name -> user-name
|
|
private_ext():m_counter(0) {}
|
|
};
|
|
|
|
struct private_ext_reg {
|
|
unsigned m_ext_id;
|
|
private_ext_reg() { m_ext_id = environment::register_extension(std::make_shared<private_ext>()); }
|
|
};
|
|
|
|
static private_ext_reg g_ext;
|
|
static private_ext const & get_extension(environment const & env) {
|
|
return static_cast<private_ext const &>(env.get_extension(g_ext.m_ext_id));
|
|
}
|
|
static environment update(environment const & env, private_ext const & ext) {
|
|
return env.update(g_ext.m_ext_id, std::make_shared<private_ext>(ext));
|
|
}
|
|
|
|
static name g_private("private");
|
|
static std::string g_prv_key("prv");
|
|
|
|
// Make sure the mapping "hidden-name r ==> user-name n" is preserved when we close sections and
|
|
// export .olean files.
|
|
static environment preserve_private_data(environment const & env, name const & r, name const & n) {
|
|
return module::add(env, g_prv_key, [=](serializer & s) { s << n << r; });
|
|
}
|
|
|
|
pair<environment, name> add_private_name(environment const & env, name const & n, optional<unsigned> const & extra_hash) {
|
|
private_ext ext = get_extension(env);
|
|
unsigned h = hash(n.hash(), ext.m_counter);
|
|
if (extra_hash)
|
|
h = hash(h, *extra_hash);
|
|
name r = name(g_private, h) + n;
|
|
ext.m_inv_map.insert(r, n);
|
|
ext.m_counter++;
|
|
environment new_env = update(env, ext);
|
|
new_env = preserve_private_data(new_env, r, n);
|
|
return mk_pair(new_env, r);
|
|
}
|
|
|
|
static void private_reader(deserializer & d, module_idx, shared_environment & senv,
|
|
std::function<void(asynch_update_fn const &)> &,
|
|
std::function<void(delayed_update_fn const &)> &) {
|
|
name n, h;
|
|
d >> n >> h;
|
|
senv.update([=](environment const & env) -> environment {
|
|
private_ext ext = get_extension(env);
|
|
// we restore only the mapping hidden-name -> user-name (for pretty printing purposes)
|
|
ext.m_inv_map.insert(h, n);
|
|
ext.m_counter++;
|
|
return update(env, ext);
|
|
});
|
|
}
|
|
|
|
register_module_object_reader_fn g_private_reader(g_prv_key, private_reader);
|
|
|
|
optional<name> hidden_to_user_name(environment const & env, name const & n) {
|
|
auto it = get_extension(env).m_inv_map.find(n);
|
|
return it ? optional<name>(*it) : optional<name>();
|
|
}
|
|
|
|
static int add_private_name(lua_State * L) {
|
|
int nargs = lua_gettop(L);
|
|
optional<unsigned> h;
|
|
if (nargs > 2)
|
|
h = lua_tonumber(L, 3);
|
|
auto p = add_private_name(to_environment(L, 1), to_name_ext(L, 2), h);
|
|
push_environment(L, p.first);
|
|
push_name(L, p.second);
|
|
return 2;
|
|
}
|
|
|
|
static int hidden_to_user_name(lua_State * L) { return push_optional_name(L, hidden_to_user_name(to_environment(L, 1), to_name_ext(L, 2))); }
|
|
|
|
void open_private(lua_State * L) {
|
|
SET_GLOBAL_FUN(add_private_name, "add_private_name");
|
|
SET_GLOBAL_FUN(hidden_to_user_name, "hidden_to_user_name");
|
|
}
|
|
}
|