233 lines
9.1 KiB
C++
233 lines
9.1 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 <string>
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#include "util/sstream.h"
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#include "kernel/environment.h"
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#include "kernel/type_checker.h"
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#include "library/kernel_serializer.h"
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#include "library/scoped_ext.h"
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#include "library/reducible.h"
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#include "library/kernel_bindings.h"
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namespace lean {
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struct reducible_entry {
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reducible_status m_status;
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name m_name;
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reducible_entry():m_status(reducible_status::Semireducible) {}
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reducible_entry(reducible_status s, name const & n):m_status(s), m_name(n) {}
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};
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void reducible_state::add(reducible_entry const & e) {
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m_status.insert(e.m_name, e.m_status);
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}
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reducible_status reducible_state::get_status(name const & n) const {
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if (auto it = m_status.find(n))
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return *it;
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else
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return reducible_status::Semireducible;
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}
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static name * g_class_name = nullptr;
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static std::string * g_key = nullptr;
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struct reducible_config {
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typedef reducible_state state;
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typedef reducible_entry entry;
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static void add_entry(environment const &, io_state const &, state & s, entry const & e) {
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s.add(e);
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}
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static name const & get_class_name() {
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return *g_class_name;
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}
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static std::string const & get_serialization_key() {
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return *g_key;
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}
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static void write_entry(serializer & s, entry const & e) {
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s << static_cast<char>(e.m_status) << e.m_name;
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}
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static entry read_entry(deserializer & d) {
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entry e; char s;
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d >> s >> e.m_name;
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e.m_status = static_cast<reducible_status>(s);
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return e;
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}
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static optional<unsigned> get_fingerprint(entry const & e) {
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return some(hash(static_cast<unsigned>(e.m_status), e.m_name.hash()));
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}
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};
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template class scoped_ext<reducible_config>;
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typedef scoped_ext<reducible_config> reducible_ext;
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static name * g_tmp_prefix = nullptr;
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void initialize_reducible() {
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g_class_name = new name("reduce-hints");
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g_key = new std::string("redu");
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g_tmp_prefix = new name(name::mk_internal_unique_name());
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reducible_ext::initialize();
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}
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void finalize_reducible() {
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reducible_ext::finalize();
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delete g_tmp_prefix;
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delete g_key;
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delete g_class_name;
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}
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static void check_declaration(environment const & env, name const & n) {
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declaration const & d = env.get(n);
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if (!d.is_definition())
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throw exception(sstream() << "invalid reducible command, '" << n << "' is not a definition");
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if (d.is_theorem())
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throw exception(sstream() << "invalid reducible command, '" << n << "' is a theorem");
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if (d.is_opaque() && d.get_module_idx() != g_main_module_idx)
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throw exception(sstream() << "invalid reducible command, '" << n << "' is an opaque definition");
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}
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environment set_reducible(environment const & env, name const & n, reducible_status s, bool persistent) {
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check_declaration(env, n);
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return reducible_ext::add_entry(env, get_dummy_ios(), reducible_entry(s, n), persistent);
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}
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reducible_status get_reducible_status(environment const & env, name const & n) {
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reducible_state const & s = reducible_ext::get_state(env);
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return s.get_status(n);
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}
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bool is_at_least_quasireducible(environment const & env, name const & n) {
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reducible_status r = get_reducible_status(env, n);
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return r == reducible_status::Reducible || r == reducible_status::Quasireducible;
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}
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unfold_reducible_converter::unfold_reducible_converter(environment const & env, bool relax_main_opaque, bool memoize):
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default_converter(env, relax_main_opaque, memoize) {
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m_state = reducible_ext::get_state(env);
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}
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bool unfold_reducible_converter::is_opaque(declaration const & d) const {
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auto r = m_state.get_status(d.get_name());
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if (r != reducible_status::Reducible) return true;
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return default_converter::is_opaque(d);
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}
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unfold_quasireducible_converter::unfold_quasireducible_converter(environment const & env, bool relax_main_opaque, bool memoize):
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default_converter(env, relax_main_opaque, memoize) {
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m_state = reducible_ext::get_state(env);
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}
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bool unfold_quasireducible_converter::is_opaque(declaration const & d) const {
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auto r = m_state.get_status(d.get_name());
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if (r != reducible_status::Reducible && r != reducible_status::Quasireducible) return true;
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return default_converter::is_opaque(d);
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}
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unfold_semireducible_converter::unfold_semireducible_converter(environment const & env, bool relax_main_opaque, bool memoize):
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default_converter(env, relax_main_opaque, memoize) {
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m_state = reducible_ext::get_state(env);
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}
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bool unfold_semireducible_converter::is_opaque(declaration const & d) const {
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auto r = m_state.get_status(d.get_name());
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if (r == reducible_status::Irreducible) return true;
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return default_converter::is_opaque(d);
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}
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std::unique_ptr<type_checker> mk_type_checker(environment const & env, name_generator const & ngen,
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bool relax_main_opaque, reducible_behavior rb,
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bool memoize) {
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switch (rb) {
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case UnfoldReducible:
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return std::unique_ptr<type_checker>(new type_checker(env, ngen,
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std::unique_ptr<converter>(new unfold_reducible_converter(env, relax_main_opaque, memoize))));
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case UnfoldQuasireducible:
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return std::unique_ptr<type_checker>(new type_checker(env, ngen,
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std::unique_ptr<converter>(new unfold_quasireducible_converter(env, relax_main_opaque, memoize))));
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case UnfoldSemireducible:
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return std::unique_ptr<type_checker>(new type_checker(env, ngen,
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std::unique_ptr<converter>(new unfold_semireducible_converter(env, relax_main_opaque, memoize))));
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}
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lean_unreachable();
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}
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std::unique_ptr<type_checker> mk_type_checker(environment const & env, bool relax_main_opaque, reducible_behavior rb) {
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return mk_type_checker(env, name_generator(*g_tmp_prefix), relax_main_opaque, rb);
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}
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class opaque_converter : public default_converter {
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public:
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opaque_converter(environment const & env): default_converter(env, true, true) {}
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virtual bool is_opaque(declaration const &) const { return true; }
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};
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std::unique_ptr<type_checker> mk_opaque_type_checker(environment const & env, name_generator const & ngen) {
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return std::unique_ptr<type_checker>(new type_checker(env, ngen,
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std::unique_ptr<converter>(new opaque_converter(env))));
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}
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static int mk_opaque_type_checker(lua_State * L) {
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int nargs = lua_gettop(L);
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if (nargs == 0) {
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type_checker_ref r(mk_opaque_type_checker(get_global_environment(L), name_generator()));
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return push_type_checker_ref(L, r);
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} else if (nargs == 1) {
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type_checker_ref r(mk_opaque_type_checker(to_environment(L, 1), name_generator()));
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return push_type_checker_ref(L, r);
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} else {
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type_checker_ref r(mk_opaque_type_checker(to_environment(L, 1), to_name_generator(L, 2)));
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return push_type_checker_ref(L, r);
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}
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}
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static int mk_reducible_checker_core(lua_State * L, reducible_behavior rb) {
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int nargs = lua_gettop(L);
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if (nargs == 0) {
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type_checker_ref r(mk_type_checker(get_global_environment(L), name_generator(), false, rb));
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return push_type_checker_ref(L, r);
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} else if (nargs == 1) {
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type_checker_ref r(mk_type_checker(to_environment(L, 1), name_generator(), false, rb));
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return push_type_checker_ref(L, r);
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} else {
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type_checker_ref r(mk_type_checker(to_environment(L, 1), to_name_generator(L, 2), false, rb));
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return push_type_checker_ref(L, r);
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}
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}
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static int mk_reducible_type_checker(lua_State * L) {
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return mk_reducible_checker_core(L, UnfoldReducible);
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}
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static int mk_non_irreducible_type_checker(lua_State * L) {
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return mk_reducible_checker_core(L, UnfoldSemireducible);
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}
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static int set_reducible(lua_State * L) {
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int nargs = lua_gettop(L);
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if (nargs == 3) {
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return push_environment(L, set_reducible(to_environment(L, 1), to_name_ext(L, 2),
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static_cast<reducible_status>(lua_tonumber(L, 3))));
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} else {
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return push_environment(L, set_reducible(to_environment(L, 1), to_name_ext(L, 2),
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static_cast<reducible_status>(lua_tonumber(L, 3)),
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lua_toboolean(L, 4)));
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}
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}
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void open_reducible(lua_State * L) {
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lua_newtable(L);
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SET_ENUM("Reducible", reducible_status::Reducible);
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SET_ENUM("QuasiReducible", reducible_status::Quasireducible);
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SET_ENUM("SemiReducible", reducible_status::Semireducible);
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SET_ENUM("Irreducible", reducible_status::Irreducible);
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lua_setglobal(L, "reducible_status");
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SET_GLOBAL_FUN(set_reducible, "set_reducible");
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SET_GLOBAL_FUN(mk_opaque_type_checker, "opaque_type_checker");
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SET_GLOBAL_FUN(mk_non_irreducible_type_checker, "non_irreducible_type_checker");
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SET_GLOBAL_FUN(mk_reducible_type_checker, "reducible_type_checker");
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}
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}
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