43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
/*
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Copyright (c) 2015 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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#pragma once
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#include "library/blast/action_result.h"
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#include "library/blast/options.h"
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#include "library/blast/blast.h"
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#include "util/flet.h"
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namespace lean {
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namespace blast {
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/** Generic strategy for synthesizing proofs using the blast framework.
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There are two main configuration options:
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1- Preprocessing (preprocess method)
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2- Next action to be performed (next_action method)
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*/
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class strategy {
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config m_config;
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unsigned m_init_num_choices;
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optional<expr> invoke_preprocess();
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protected:
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virtual optional<expr> preprocess() = 0;
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virtual action_result next_action() = 0;
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action_result next_branch(expr pr);
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optional<expr> search_upto(unsigned depth);
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optional<expr> search();
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public:
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strategy();
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optional<expr> operator()() { return search(); }
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config cfg() const { return m_config; }
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};
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#define TryStrategy(Code) {\
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flet<state> save_state(curr_state(), curr_state());\
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curr_state().clear_proof_steps();\
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if (optional<expr> pf = Code) { return action_result::solved(*pf); }\
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}
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}}
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