101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
|
|
Copyright (c) 2015 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
|
|
Author: Leonardo de Moura
|
|
*/
|
|
#include <string>
|
|
#include "util/sstream.h"
|
|
#include "kernel/kernel_exception.h"
|
|
#include "kernel/instantiate.h"
|
|
#include "kernel/inductive/inductive.h"
|
|
#include "library/util.h"
|
|
#include "library/projection.h"
|
|
#include "library/module.h"
|
|
#include "library/kernel_serializer.h"
|
|
|
|
namespace lean {
|
|
/** \brief This environment extension stores information about all projection functions
|
|
defined in an environment object.
|
|
*/
|
|
struct projection_ext : public environment_extension {
|
|
name_map<projection_info> m_info;
|
|
projection_ext() {}
|
|
};
|
|
|
|
struct projection_ext_reg {
|
|
unsigned m_ext_id;
|
|
projection_ext_reg() {
|
|
m_ext_id = environment::register_extension(std::make_shared<projection_ext>());
|
|
}
|
|
};
|
|
|
|
static projection_ext_reg * g_ext = nullptr;
|
|
static projection_ext const & get_extension(environment const & env) {
|
|
return static_cast<projection_ext const &>(env.get_extension(g_ext->m_ext_id));
|
|
}
|
|
static environment update(environment const & env, projection_ext const & ext) {
|
|
return env.update(g_ext->m_ext_id, std::make_shared<projection_ext>(ext));
|
|
}
|
|
|
|
struct proj_modification : public modification {
|
|
LEAN_MODIFICATION("proj")
|
|
|
|
name m_proj;
|
|
projection_info m_info;
|
|
|
|
proj_modification() {}
|
|
proj_modification(name const & proj, projection_info const & info) : m_proj(proj), m_info(info) {}
|
|
|
|
void perform(environment & env) const override {
|
|
projection_ext ext = get_extension(env);
|
|
ext.m_info.insert(m_proj, m_info);
|
|
env = update(env, ext);
|
|
}
|
|
|
|
void serialize(serializer & s) const override {
|
|
s << m_proj << m_info.m_constructor << m_info.m_nparams << m_info.m_i << m_info.m_inst_implicit;
|
|
}
|
|
|
|
static std::shared_ptr<modification const> deserialize(deserializer & d) {
|
|
name p, mk; unsigned nparams, i; bool inst_implicit;
|
|
d >> p >> mk >> nparams >> i >> inst_implicit;
|
|
return std::make_shared<proj_modification>(p, projection_info(mk, nparams, i, inst_implicit));
|
|
}
|
|
};
|
|
|
|
environment save_projection_info(environment const & env, name const & p, name const & mk, unsigned nparams, unsigned i, bool inst_implicit) {
|
|
return module::add_and_perform(env, std::make_shared<proj_modification>(
|
|
p, projection_info(mk, nparams, i, inst_implicit)));
|
|
}
|
|
|
|
projection_info const * get_projection_info(environment const & env, name const & p) {
|
|
projection_ext const & ext = get_extension(env);
|
|
return ext.m_info.find(p);
|
|
}
|
|
|
|
name_map<projection_info> const & get_projection_info_map(environment const & env) {
|
|
return get_extension(env).m_info;
|
|
}
|
|
|
|
/** \brief Return true iff the type named \c S can be viewed as
|
|
a structure in the given environment.
|
|
|
|
If not, generate an error message using \c pos.
|
|
*/
|
|
bool is_structure_like(environment const & env, name const & S) {
|
|
optional<inductive::inductive_decl> decl = inductive::is_inductive_decl(env, S);
|
|
if (!decl) return false;
|
|
return length(decl->m_intro_rules) == 1 && *inductive::get_num_indices(env, S) == 0;
|
|
}
|
|
|
|
void initialize_projection() {
|
|
g_ext = new projection_ext_reg();
|
|
proj_modification::init();
|
|
}
|
|
|
|
void finalize_projection() {
|
|
proj_modification::finalize();
|
|
delete g_ext;
|
|
}
|
|
}
|