mirror of
https://github.com/Z3Prover/z3
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7ce88d4da9
- remove unused variables and class fields - add support for gcc 4.5 & clang's __builtin_unreachable - fix 2 bugs related to strict aliasing - remove a few unused function parameters Signed-off-by: Nuno Lopes <t-nclaud@microsoft.com>
63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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matcher.h
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-02-02.
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Revision History:
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--*/
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#ifndef _MATCHER_H_
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#define _MATCHER_H_
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#include"substitution.h"
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#include"hashtable.h"
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/**
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\brief Functor for matching expressions.
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*/
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class matcher {
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typedef std::pair<expr *, expr *> expr_pair;
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typedef pair_hash<obj_ptr_hash<expr>, obj_ptr_hash<expr> > expr_pair_hash;
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typedef hashtable<expr_pair, expr_pair_hash, default_eq<expr_pair> > cache;
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substitution * m_subst;
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// cache m_cache;
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svector<expr_pair> m_todo;
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void reset();
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public:
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matcher() {}
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/**
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\brief Return true if e2 is an instance of e1.
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In case of success (result is true), it will store the substitution that makes e1 equals to e2 into s.
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For example:
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1) e1 = f(g(x), x), e2 = f(g(h(a)), h(a))
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The result is true, and s will contain x -> h(a)
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2) e1 = f(a, x) e2 = f(x, a)
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The result is false.
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3) e1 = f(x, x) e2 = f(y, a)
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The result is false
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4) e1 = f(x, y) e2 = f(h(z), a)
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The result is true, and s contains x->h(z) and y->a
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*/
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bool operator()(expr * e1, expr * e2, substitution & s);
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};
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#endif /* _MATCHER_H_ */
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