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37 lines
770 B
C
37 lines
770 B
C
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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expr_delta_pair.h
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-01-14.
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Revision History:
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--*/
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#ifndef _EXPR_DELTA_PAIR_H_
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#define _EXPR_DELTA_PAIR_H_
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/**
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\brief Auxiliary structure used to cache the intermediate results of the variable substitution procedure.
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*/
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struct expr_delta_pair {
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expr * m_node;
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unsigned m_delta;
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expr_delta_pair():m_node(0), m_delta(0) {}
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expr_delta_pair(expr * n, unsigned d):m_node(n), m_delta(d) {}
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unsigned hash() const { return hash_u_u(m_node->hash(), m_delta); }
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bool operator==(const expr_delta_pair & e) const { return m_node == e.m_node && m_delta == e.m_delta; }
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};
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#endif /* _EXPR_DELTA_PAIR_H_ */
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