300 lines
10 KiB
C++
300 lines
10 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/object_serializer.h"
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#include "kernel/expr.h"
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#include "kernel/definition.h"
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#include "kernel/max_sharing.h"
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#include "library/kernel_serializer.h"
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// Procedures for serializing and deserializing kernel objects (levels, exprs, definitions)
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namespace lean {
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// Universe level serialization
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class level_serializer : public object_serializer<level, level::ptr_hash, level::ptr_eq> {
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typedef object_serializer<level, level::ptr_hash, level::ptr_eq> super;
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public:
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void write(level const & l) {
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super::write(l, [&]() {
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serializer & s = get_owner();
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auto k = kind(l);
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s << static_cast<char>(k);
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switch (k) {
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case level_kind::Zero: break;
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case level_kind::Param: s << param_id(l); break;
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case level_kind::Global: s << global_id(l); break;
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case level_kind::Meta: s << meta_id(l); break;
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case level_kind::Max: write(max_lhs(l)); write(max_rhs(l)); break;
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case level_kind::IMax: write(imax_lhs(l)); write(imax_rhs(l)); break;
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case level_kind::Succ: write(succ_of(l)); break;
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}
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});
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}
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};
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class level_deserializer : public object_deserializer<level> {
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typedef object_deserializer<level> super;
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public:
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level read() {
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return super::read([&]() -> level {
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deserializer & d = get_owner();
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auto k = static_cast<level_kind>(d.read_char());
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switch (k) {
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case level_kind::Zero:
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return mk_level_zero();
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case level_kind::Param:
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return mk_param_univ(read_name(d));
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case level_kind::Global:
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return mk_global_univ(read_name(d));
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case level_kind::Meta:
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return mk_meta_univ(read_name(d));
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case level_kind::Max: {
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level lhs = read();
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return mk_max(lhs, read());
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}
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case level_kind::IMax: {
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level lhs = read();
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return mk_imax(lhs, read());
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}
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case level_kind::Succ:
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return mk_succ(read());
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}
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throw_corrupted_file();
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});
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}
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};
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struct level_sd {
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unsigned m_s_extid;
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unsigned m_d_extid;
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level_sd() {
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m_s_extid = serializer::register_extension([](){
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return std::unique_ptr<serializer::extension>(new level_serializer());
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});
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m_d_extid = deserializer::register_extension([](){
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return std::unique_ptr<deserializer::extension>(new level_deserializer());
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});
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}
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};
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static level_sd g_level_sd;
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serializer & operator<<(serializer & s, level const & n) {
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s.get_extension<level_serializer>(g_level_sd.m_s_extid).write(n);
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return s;
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}
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level read_level(deserializer & d) { return d.get_extension<level_deserializer>(g_level_sd.m_d_extid).read(); }
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serializer & operator<<(serializer & s, levels const & ls) { return write_list<level>(s, ls); }
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levels read_levels(deserializer & d) { return read_list<level>(d, read_level); }
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// Expression serialization
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typedef std::unordered_map<std::string, macro_definition_cell::reader> macro_readers;
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static std::unique_ptr<macro_readers> g_macro_readers;
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macro_readers & get_macro_readers() {
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if (!g_macro_readers)
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g_macro_readers.reset(new macro_readers());
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return *(g_macro_readers.get());
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}
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void register_macro_deserializer(std::string const & k, macro_definition_cell::reader rd) {
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macro_readers & readers = get_macro_readers();
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lean_assert(readers.find(k) == readers.end());
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readers[k] = rd;
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}
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static expr read_macro_definition(deserializer & d, unsigned num, expr const * args) {
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auto k = d.read_string();
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macro_readers & readers = get_macro_readers();
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auto it = readers.find(k);
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lean_assert(it != readers.end());
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return it->second(d, num, args);
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}
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serializer & operator<<(serializer & s, binder_info const & i) {
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s.write_bool(i.is_implicit());
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s.write_bool(i.is_cast());
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return s;
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}
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static binder_info read_binder_info(deserializer & d) {
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bool imp = d.read_bool();
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bool cast = d.read_bool();
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return binder_info(imp, cast);
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}
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class expr_serializer : public object_serializer<expr, expr_hash_alloc, expr_eqp> {
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typedef object_serializer<expr, expr_hash_alloc, expr_eqp> super;
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max_sharing_fn m_max_sharing_fn;
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void write_core(expr const & a) {
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auto k = a.kind();
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super::write_core(a, static_cast<char>(k), [&]() {
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serializer & s = get_owner();
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switch (k) {
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case expr_kind::Var:
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s << var_idx(a);
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break;
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case expr_kind::Constant:
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s << const_name(a) << const_levels(a);
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break;
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case expr_kind::Sort:
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s << sort_level(a);
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break;
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case expr_kind::Macro:
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s << macro_num_args(a);
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for (unsigned i = 0; i < macro_num_args(a); i++) {
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write_core(macro_arg(a, i));
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}
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macro_def(a).write(s);
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break;
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case expr_kind::App:
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write_core(app_fn(a)); write_core(app_arg(a));
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break;
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case expr_kind::Lambda: case expr_kind::Pi:
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s << binding_name(a) << binding_info(a); write_core(binding_domain(a)); write_core(binding_body(a));
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break;
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case expr_kind::Let:
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s << let_name(a); write_core(let_type(a)); write_core(let_value(a)); write_core(let_body(a));
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break;
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case expr_kind::Meta: case expr_kind::Local:
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s << mlocal_name(a); write_core(mlocal_type(a));
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break;
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}
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});
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}
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public:
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void write(expr const & a) {
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write_core(m_max_sharing_fn(a));
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}
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};
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class expr_deserializer : public object_deserializer<expr> {
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typedef object_deserializer<expr> super;
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public:
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expr read_binder(expr_kind k) {
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deserializer & d = get_owner();
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name n = read_name(d);
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binder_info i = read_binder_info(d);
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expr t = read();
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return mk_binder(k, n, t, read(), i);
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}
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expr read() {
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return super::read_core([&](char c) {
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deserializer & d = get_owner();
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auto k = static_cast<expr_kind>(c);
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switch (k) {
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case expr_kind::Var:
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return mk_var(d.read_unsigned());
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case expr_kind::Constant: {
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auto n = read_name(d);
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return mk_constant(n, read_levels(d));
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}
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case expr_kind::Sort:
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return mk_sort(read_level(d));
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case expr_kind::Macro: {
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unsigned n = d.read_unsigned();
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buffer<expr> args;
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for (unsigned i = 0; i < n; i++) {
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args.push_back(read());
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}
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return read_macro_definition(d, args.size(), args.data());
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}
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case expr_kind::App: {
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expr f = read();
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return mk_app(f, read());
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}
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case expr_kind::Lambda: case expr_kind::Pi:
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return read_binder(k);
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case expr_kind::Let: {
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name n = read_name(d);
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expr t = read();
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expr v = read();
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return mk_let(n, t, v, read());
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}
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case expr_kind::Meta: {
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name n = read_name(d);
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return mk_metavar(n, read());
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}
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case expr_kind::Local: {
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name n = read_name(d);
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return mk_local(n, read());
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}}
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throw_corrupted_file(); // LCOV_EXCL_LINE
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});
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}
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};
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struct expr_sd {
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unsigned m_s_extid;
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unsigned m_d_extid;
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expr_sd() {
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m_s_extid = serializer::register_extension([](){ return std::unique_ptr<serializer::extension>(new expr_serializer()); });
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m_d_extid = deserializer::register_extension([](){ return std::unique_ptr<deserializer::extension>(new expr_deserializer()); });
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}
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};
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static expr_sd g_expr_sd;
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serializer & operator<<(serializer & s, expr const & n) {
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s.get_extension<expr_serializer>(g_expr_sd.m_s_extid).write(n);
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return s;
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}
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expr read_expr(deserializer & d) {
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return d.get_extension<expr_deserializer>(g_expr_sd.m_d_extid).read();
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}
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// Definition serialization
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static serializer & operator<<(serializer & s, level_param_names const & ps) { return write_list<name>(s, ps); }
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static level_param_names read_level_params(deserializer & d) { return read_list<name>(d); }
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serializer & operator<<(serializer & s, definition const & d) {
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char k = 0;
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if (d.is_definition()) {
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k |= 1;
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if (d.is_opaque())
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k |= 2;
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if (d.use_conv_opt())
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k |= 4;
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}
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if (d.is_theorem())
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k |= 8;
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s << k << d.get_name() << d.get_params() << d.get_type();
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if (d.is_definition()) {
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s << d.get_value();
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if (!d.is_theorem())
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s << d.get_weight();
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}
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return s;
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}
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definition read_definition(deserializer & d, unsigned module_idx) {
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char k = d.read_char();
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bool has_value = (k & 1) != 0;
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bool is_theorem = (k & 8) != 0;
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name n = read_name(d);
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level_param_names ps = read_level_params(d);
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expr t = read_expr(d);
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if (has_value) {
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expr v = read_expr(d);
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if (is_theorem) {
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return mk_theorem(n, ps, t, v);
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} else {
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unsigned w = d.read_unsigned();
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bool is_opaque = (k & 2) != 0;
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bool use_conv_opt = (k & 4) != 0;
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return mk_definition(n, ps, t, v, is_opaque, w, module_idx, use_conv_opt);
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}
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} else {
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if (is_theorem)
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return mk_axiom(n, ps, t);
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else
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return mk_var_decl(n, ps, t);
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}
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}
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}
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