230 lines
8.7 KiB
C++
230 lines
8.7 KiB
C++
/*
|
|
Copyright (c) 2013-2014 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
|
|
Author: Leonardo de Moura
|
|
*/
|
|
#include <utility>
|
|
#include <vector>
|
|
#include <limits>
|
|
#include <util/task_builder.h>
|
|
#include "runtime/thread.h"
|
|
#include "kernel/environment.h"
|
|
#include "kernel/kernel_exception.h"
|
|
#include "kernel/old_type_checker.h"
|
|
#include "kernel/quot.h"
|
|
|
|
namespace lean {
|
|
environment_header::environment_header(unsigned trust_lvl, std::unique_ptr<normalizer_extension const> ext):
|
|
m_trust_lvl(trust_lvl), m_norm_ext(std::move(ext)) {}
|
|
|
|
environment_extension::~environment_extension() {}
|
|
|
|
struct environment_id::path {
|
|
unsigned m_next_depth;
|
|
unsigned m_start_depth;
|
|
mutex m_mutex;
|
|
path * m_prev;
|
|
MK_LEAN_RC(); // Declare m_rc counter
|
|
void dealloc() { delete this; }
|
|
|
|
path():m_next_depth(1), m_start_depth(0), m_prev(nullptr), m_rc(1) {}
|
|
path(unsigned start_depth, path * prev):m_next_depth(start_depth + 1), m_start_depth(start_depth), m_prev(prev), m_rc(1) {
|
|
if (prev) prev->inc_ref();
|
|
}
|
|
~path() { if (m_prev) m_prev->dec_ref(); }
|
|
};
|
|
|
|
environment_id::environment_id():m_ptr(new path()), m_depth(0) {}
|
|
environment_id::environment_id(environment_id const & ancestor, bool) {
|
|
if (ancestor.m_depth == std::numeric_limits<unsigned>::max())
|
|
throw exception("maximal depth in is_descendant tree has been reached, use 'forget' method to workaround this limitation");
|
|
lock_guard<mutex> lock(ancestor.m_ptr->m_mutex);
|
|
if (ancestor.m_ptr->m_next_depth == ancestor.m_depth + 1) {
|
|
m_ptr = ancestor.m_ptr;
|
|
m_depth = ancestor.m_depth + 1;
|
|
m_ptr->m_next_depth++;
|
|
m_ptr->inc_ref();
|
|
} else {
|
|
m_ptr = new path(ancestor.m_depth+1, ancestor.m_ptr);
|
|
m_depth = ancestor.m_depth + 1;
|
|
}
|
|
lean_assert(m_depth == ancestor.m_depth+1);
|
|
lean_assert(m_ptr->m_next_depth == m_depth+1);
|
|
}
|
|
environment_id::environment_id(environment_id const & id):m_ptr(id.m_ptr), m_depth(id.m_depth) { if (m_ptr) m_ptr->inc_ref(); }
|
|
environment_id::environment_id(environment_id && id):m_ptr(id.m_ptr), m_depth(id.m_depth) { id.m_ptr = nullptr; }
|
|
environment_id::~environment_id() { if (m_ptr) m_ptr->dec_ref(); }
|
|
environment_id & environment_id::operator=(environment_id const & s) { m_depth = s.m_depth; LEAN_COPY_REF(s); }
|
|
environment_id & environment_id::operator=(environment_id && s) { m_depth = s.m_depth; LEAN_MOVE_REF(s); }
|
|
bool environment_id::is_descendant(environment_id const & id) const {
|
|
if (m_depth < id.m_depth)
|
|
return false;
|
|
path * p = m_ptr;
|
|
while (p != nullptr) {
|
|
if (p == id.m_ptr)
|
|
return true;
|
|
if (p->m_start_depth <= id.m_depth)
|
|
return false;
|
|
p = p->m_prev;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
environment::environment(unsigned trust_lvl):
|
|
environment(trust_lvl, mk_id_normalizer_extension())
|
|
{}
|
|
|
|
environment::environment(unsigned trust_lvl, std::unique_ptr<normalizer_extension> ext):
|
|
m_header(std::make_shared<environment_header>(trust_lvl, std::move(ext))),
|
|
m_extensions(std::make_shared<environment_extensions const>())
|
|
{}
|
|
|
|
environment::~environment() {}
|
|
|
|
optional<declaration> environment::find(name const & n) const {
|
|
declaration const * r = m_declarations.find(n);
|
|
return r ? some_declaration(*r) : none_declaration();
|
|
}
|
|
|
|
declaration environment::get(name const & n) const {
|
|
declaration const * r = m_declarations.find(n);
|
|
if (!r)
|
|
throw unknown_declaration_exception(*this, n);
|
|
return *r;
|
|
}
|
|
|
|
[[ noreturn ]] void throw_incompatible_environment(environment const & env) {
|
|
throw kernel_exception(env, "invalid declaration, it was checked/certified in an incompatible environment");
|
|
}
|
|
|
|
bool environment::is_recursor(name const & n) const {
|
|
return m_header->is_recursor(*this, n) || (m_quot_initialized && quot_is_rec(n));
|
|
}
|
|
|
|
bool environment::is_builtin(name const & n) const {
|
|
return m_header->is_builtin(*this, n) || (m_quot_initialized && quot_is_decl(n));
|
|
}
|
|
|
|
environment environment::add_quot() const {
|
|
if (m_quot_initialized)
|
|
return *this;
|
|
environment new_env = quot_declare(*this);
|
|
new_env.m_quot_initialized = true;
|
|
return new_env;
|
|
}
|
|
|
|
environment environment::add(certified_declaration const & d) const {
|
|
if (!m_id.is_descendant(d.get_id()))
|
|
throw_incompatible_environment(*this);
|
|
name const & n = d.get_declaration().get_name();
|
|
if (find(n))
|
|
throw already_declared_exception(*this, n);
|
|
return environment(*this, insert(m_declarations, n, d.get_declaration()));
|
|
}
|
|
|
|
environment environment::add_meta(buffer<declaration> const & ds, bool check) const {
|
|
if (!check && trust_lvl() == 0)
|
|
throw kernel_exception(*this, "invalid meta declarations, type checking cannot be skipped at trust level 0");
|
|
environment new_env = *this;
|
|
/* Check declarations header, and add them to new_env.m_declarations */
|
|
for (declaration const & d : ds) {
|
|
if (check)
|
|
check_decl_type(new_env, d);
|
|
new_env.m_declarations.insert(d.get_name(), d);
|
|
}
|
|
/* Check actual definitions */
|
|
if (check) {
|
|
for (declaration const & d : ds) {
|
|
check_decl_value(new_env, d);
|
|
}
|
|
}
|
|
return new_env;
|
|
}
|
|
|
|
environment environment::replace(certified_declaration const & t) const {
|
|
if (!m_id.is_descendant(t.get_id()))
|
|
throw_incompatible_environment(*this);
|
|
name const & n = t.get_declaration().get_name();
|
|
auto ax = find(n);
|
|
if (!ax)
|
|
throw kernel_exception(*this, "invalid replacement of axiom with theorem, the environment does not have an axiom with the given name");
|
|
if (!ax->is_axiom())
|
|
throw kernel_exception(*this, "invalid replacement of axiom with theorem, the current declaration in the environment is not an axiom");
|
|
if (!t.get_declaration().is_theorem())
|
|
throw kernel_exception(*this, "invalid replacement of axiom with theorem, the new declaration is not a theorem");
|
|
if (ax->get_type() != t.get_declaration().get_type())
|
|
throw kernel_exception(*this, "invalid replacement of axiom with theorem, the 'replace' operation can only be used when the axiom and theorem have the same type");
|
|
if (ax->get_univ_params() != t.get_declaration().get_univ_params())
|
|
throw kernel_exception(*this, "invalid replacement of axiom with theorem, the 'replace' operation can only be used when the axiom and theorem have the same universe parameters");
|
|
return environment(*this, insert(m_declarations, n, t.get_declaration()));
|
|
}
|
|
|
|
environment environment::forget() const {
|
|
environment new_env = *this;
|
|
new_env.m_id = environment_id();
|
|
return new_env;
|
|
}
|
|
|
|
class extension_manager {
|
|
std::vector<std::shared_ptr<environment_extension const>> m_exts;
|
|
mutex m_mutex;
|
|
public:
|
|
unsigned register_extension(std::shared_ptr<environment_extension const> const & ext) {
|
|
lock_guard<mutex> lock(m_mutex);
|
|
unsigned r = m_exts.size();
|
|
m_exts.push_back(ext);
|
|
return r;
|
|
}
|
|
|
|
bool has_ext(unsigned extid) const { return extid < m_exts.size(); }
|
|
|
|
environment_extension const & get_initial(unsigned extid) {
|
|
lock_guard<mutex> lock(m_mutex);
|
|
return *(m_exts[extid].get());
|
|
}
|
|
};
|
|
|
|
static extension_manager * g_extension_manager = nullptr;
|
|
static extension_manager & get_extension_manager() {
|
|
return *g_extension_manager;
|
|
}
|
|
|
|
void initialize_environment() {
|
|
g_extension_manager = new extension_manager();
|
|
}
|
|
|
|
void finalize_environment() {
|
|
delete g_extension_manager;
|
|
}
|
|
|
|
unsigned environment::register_extension(std::shared_ptr<environment_extension const> const & initial) {
|
|
return get_extension_manager().register_extension(initial);
|
|
}
|
|
|
|
[[ noreturn ]] void throw_invalid_extension(environment const & env) {
|
|
throw kernel_exception(env, "invalid environment extension identifier");
|
|
}
|
|
|
|
environment_extension const & environment::get_extension(unsigned id) const {
|
|
if (!get_extension_manager().has_ext(id))
|
|
throw_invalid_extension(*this);
|
|
if (id >= m_extensions->size() || !(*m_extensions)[id])
|
|
return get_extension_manager().get_initial(id);
|
|
return *((*m_extensions)[id].get());
|
|
}
|
|
|
|
environment environment::update(unsigned id, std::shared_ptr<environment_extension const> const & ext) const {
|
|
if (!get_extension_manager().has_ext(id))
|
|
throw_invalid_extension(*this);
|
|
auto new_exts = std::make_shared<environment_extensions>(*m_extensions);
|
|
if (id >= new_exts->size())
|
|
new_exts->resize(id+1);
|
|
(*new_exts)[id] = ext;
|
|
return environment(*this, new_exts);
|
|
}
|
|
|
|
void environment::for_each_declaration(std::function<void(declaration const & d)> const & f) const {
|
|
m_declarations.for_each([&](name const &, declaration const & d) { return f(d); });
|
|
}
|
|
}
|