lean2/src/kernel/converter.h

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/*
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#pragma once
#include <functional>
#include "kernel/environment.h"
namespace lean {
class type_checker;
class converter {
protected:
name mk_fresh_name(type_checker & tc);
pair<expr, constraint_seq> infer_type(type_checker & tc, expr const & e);
extension_context & get_extension(type_checker & tc);
public:
virtual ~converter() {}
virtual pair<expr, constraint_seq> whnf(expr const & e, type_checker & c) = 0;
virtual pair<bool, constraint_seq> is_def_eq(expr const & t, expr const & s, type_checker & c, delayed_justification & j) = 0;
virtual optional<module_idx> get_module_idx() const = 0;
virtual bool is_opaque(declaration const & d) const = 0;
pair<bool, constraint_seq> is_def_eq(expr const & t, expr const & s, type_checker & c);
};
/** \brief Temporary hack for creating a scope where the opaque annotations are ignored in the kernel. */
class transparent_scope {
bool m_old_value;
public:
transparent_scope();
~transparent_scope();
};
std::unique_ptr<converter> mk_dummy_converter();
std::unique_ptr<converter> mk_default_converter(environment const & env, optional<module_idx> mod_idx = optional<module_idx>(),
bool memoize = true);
std::unique_ptr<converter> mk_default_converter(environment const & env, optional<module_idx> mod_idx,
bool memoize, extra_opaque_pred const & pred);
std::unique_ptr<converter> mk_default_converter(environment const & env, bool unfold_opaque_main,
bool memoize = true);
std::unique_ptr<converter> mk_default_converter(environment const & env, bool unfold_opaque_main,
bool memoize, extra_opaque_pred const & pred);
bool is_opaque(declaration const & d, extra_opaque_pred const & pred, optional<module_idx> const & mod_idx);
optional<declaration> is_delta(environment const & env, expr const & e, extra_opaque_pred const & pred, optional<module_idx> const & mod_idx);
optional<declaration> is_delta(environment const & env, expr const & e, extra_opaque_pred const & pred);
optional<declaration> is_delta(environment const & env, expr const & e);
void initialize_converter();
void finalize_converter();
}