lean2/src/kernel/extension_context.h
Leonardo de Moura dcc94dde82 refactor(kernel): rename may_reduce_later to is_stuck, and make is_stuck more precise
It now reflects the definition used in the elaboration paper.
2015-04-27 11:20:15 -07:00

38 lines
1.3 KiB
C++

/*
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 "util/name.h"
#include "kernel/constraint.h"
namespace lean {
class environment;
class delayed_justification;
/**
\brief Extension context (aka API provided to macro_definitions and normalizer_extensions).
The extension can request
1) the environment being used.
2) the weak head normal form of an expression.
3) the type of an expression.
4) a new fresh name.
5) registration of a new constraint.
*/
class extension_context {
public:
virtual ~extension_context() {}
virtual environment const & env() const = 0;
virtual pair<expr, constraint_seq> whnf(expr const & e) = 0;
virtual pair<bool, constraint_seq> is_def_eq(expr const & e1, expr const & e2, delayed_justification & j) = 0;
virtual pair<expr, constraint_seq> infer_type(expr const & e) = 0;
virtual optional<expr> is_stuck(expr const & e) = 0;
virtual name mk_fresh_name() = 0;
expr whnf(expr const & e, constraint_seq & cs);
pair<expr, constraint_seq> infer(expr const & e);
expr infer_type(expr const & e, constraint_seq & cs);
bool is_def_eq(expr const & e1, expr const & e2, delayed_justification & j, constraint_seq & cs);
};
}