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https://github.com/Z3Prover/z3
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52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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order.cpp
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-02-15.
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Revision History:
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--*/
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#include"order.h"
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bool order::equal(expr_offset const & _t1, expr_offset const & _t2, substitution * s) {
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if (_t1 == _t2)
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return true;
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if (s == 0)
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return false;
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m_eq_todo.reset();
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m_eq_todo.push_back(expr_offset_pair(_t1, _t2));
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while (!m_eq_todo.empty()) {
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expr_offset_pair const & p = m_eq_todo.back();
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expr_offset t1 = find(p.first);
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expr_offset t2 = find(p.second);
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m_eq_todo.pop_back();
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if (t1 == t2)
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continue;
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expr * n1 = t1.get_expr();
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expr * n2 = t2.get_expr();
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if (!is_app(n1) || !is_app(n2))
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return false;
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if (to_app(n1)->get_decl() != to_app(n2)->get_decl())
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return false;
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if (to_app(n1)->get_num_args() != to_app(n2)->get_num_args())
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return false;
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unsigned num = to_app(n1)->get_num_args();
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for (unsigned i = 0; i < num; i++)
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m_eq_todo.push_back(expr_offset_pair(expr_offset(to_app(n1)->get_arg(i), t1.get_offset()),
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expr_offset(to_app(n2)->get_arg(i), t2.get_offset())));
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}
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return true;
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}
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