75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/*
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Copyright (c) 2014 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 <utility>
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#include <string>
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#include "util/name_set.h"
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#include "library/protected.h"
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#include "library/module.h"
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namespace lean {
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struct protected_ext : public environment_extension {
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name_set m_protected; // protected declarations
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};
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struct protected_ext_reg {
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unsigned m_ext_id;
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protected_ext_reg() { m_ext_id = environment::register_extension(std::make_shared<protected_ext>()); }
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};
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static protected_ext_reg * g_ext = nullptr;
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static protected_ext const & get_extension(environment const & env) {
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return static_cast<protected_ext const &>(env.get_extension(g_ext->m_ext_id));
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}
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static environment update(environment const & env, protected_ext const & ext) {
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return env.update(g_ext->m_ext_id, std::make_shared<protected_ext>(ext));
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}
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static std::string * g_prt_key = nullptr;
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environment add_protected(environment const & env, name const & n) {
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protected_ext ext = get_extension(env);
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ext.m_protected.insert(n);
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environment new_env = update(env, ext);
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return module::add(new_env, *g_prt_key, [=](environment const &, serializer & s) { s << n; });
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}
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static void protected_reader(deserializer & d, shared_environment & senv,
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std::function<void(asynch_update_fn const &)> &,
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std::function<void(delayed_update_fn const &)> &) {
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name n;
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d >> n;
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senv.update([=](environment const & env) -> environment {
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protected_ext ext = get_extension(env);
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ext.m_protected.insert(n);
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return update(env, ext);
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});
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}
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bool is_protected(environment const & env, name const & n) {
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return get_extension(env).m_protected.contains(n);
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}
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name get_protected_shortest_name(name const & n) {
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if (n.is_atomic() || n.get_prefix().is_atomic()) {
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return n;
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} else {
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name new_prefix = n.get_prefix().replace_prefix(n.get_prefix().get_prefix(), name());
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return n.replace_prefix(n.get_prefix(), new_prefix);
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}
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}
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void initialize_protected() {
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g_ext = new protected_ext_reg();
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g_prt_key = new std::string("prt");
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register_module_object_reader(*g_prt_key, protected_reader);
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}
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void finalize_protected() {
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delete g_prt_key;
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delete g_ext;
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}
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}
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