34 lines
966 B
C++
34 lines
966 B
C++
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/*
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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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#include "library/blast/strategy.h"
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#include "library/blast/choice_point.h"
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#include "library/blast/options.h"
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namespace lean {
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namespace blast {
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strategy iterative_deepening(strategy const & S, unsigned init, unsigned inc, unsigned max) {
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return [=]() {
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state s = curr_state();
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unsigned ncs = get_num_choice_points();
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unsigned d = init;
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while (true) {
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flet<unsigned> set_depth(get_config().m_max_depth, d);
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if (auto r = S())
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return r;
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d += inc;
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if (d > max) {
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if (get_config().m_show_failure)
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display_curr_state();
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return none_expr();
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}
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curr_state() = s;
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shrink_choice_points(ncs);
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};
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};
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}
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}}
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