29 lines
1.1 KiB
C++
29 lines
1.1 KiB
C++
/*
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Copyright (c) 2014 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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namespace lean {
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class expr;
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// =======================================
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// Structural equality
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/** \brief Binder information is ignored in the following predicate */
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bool is_equal(expr const & a, expr const & b);
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inline bool operator==(expr const & a, expr const & b) { return is_equal(a, b); }
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inline bool operator!=(expr const & a, expr const & b) { return !operator==(a, b); }
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// =======================================
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/** \brief Similar to ==, but it also compares binder information */
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bool is_bi_equal(expr const & a, expr const & b);
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struct is_bi_equal_proc { bool operator()(expr const & e1, expr const & e2) const { return is_bi_equal(e1, e2); } };
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/** Similar to is_bi_equal_proc, but it has a flag that allows us to switch select == or is_bi_equal */
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struct is_cond_bi_equal_proc {
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bool m_use_bi;
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is_cond_bi_equal_proc(bool b):m_use_bi(b) {}
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bool operator()(expr const & e1, expr const & e2) const { return m_use_bi ? is_bi_equal(e1, e2) : e1 == e2; }
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};
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}
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