51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
|
/*
|
||
|
|
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
|
||
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
||
|
|
|
||
|
|
Author: Leonardo de Moura
|
||
|
|
*/
|
||
|
|
#pragma once
|
||
|
|
#include <utility>
|
||
|
|
#include <vector>
|
||
|
|
#include "util/list.h"
|
||
|
|
#include "util/name.h"
|
||
|
|
#include "kernel/expr.h"
|
||
|
|
#include "kernel/context.h"
|
||
|
|
#include "kernel/environment.h"
|
||
|
|
|
||
|
|
namespace lean {
|
||
|
|
class goal {
|
||
|
|
list<std::pair<name, expr>> m_hypotheses;
|
||
|
|
expr m_conclusion;
|
||
|
|
public:
|
||
|
|
goal(list<std::pair<name, expr>> const & h, expr const & c);
|
||
|
|
list<std::pair<name, expr>> const & get_hypotheses() const { return m_hypotheses; }
|
||
|
|
expr const & get_conclusion() const { return m_conclusion; }
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
\brief Functor for converting a proof for a goal \c g produced using <tt>to_goal(env, ctx, T)</tt>
|
||
|
|
into a term of type \c t.
|
||
|
|
|
||
|
|
That is, the goal was created to synthesize a proof term for a proposition/type \c T in a
|
||
|
|
context \c ctx. This functor allows us to convert a proof for \c g into a term/expression \c p
|
||
|
|
s.t. <tt>ctx |- p : T</t>
|
||
|
|
*/
|
||
|
|
class goal_proof_fn {
|
||
|
|
friend std::pair<goal, goal_proof_fn> to_goal(environment const & env, context const & ctx, expr const & t);
|
||
|
|
std::vector<expr> m_constants;
|
||
|
|
goal_proof_fn(std::vector<expr> && constants);
|
||
|
|
public:
|
||
|
|
expr operator()(expr const & pr);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
\brief Convert the synthesis problem <tt>ctx |- ?p : T</tt> into a goal,
|
||
|
|
where \c T is a proposition (i.e., has type Boolean), and \c ?p is a proof we want to synthesize.
|
||
|
|
|
||
|
|
We can use tactics for solving the resultant goal, and the functor \c goal_proof_fn
|
||
|
|
to convert the proof for the goal into the proof term \c ?p.
|
||
|
|
*/
|
||
|
|
std::pair<goal, goal_proof_fn> to_goal(environment const & env, context const & ctx, expr const & t);
|
||
|
|
}
|