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59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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used_vars.h
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Abstract:
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Functor used to collect the set of used variables.
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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 USED_VARS_H_
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#define USED_VARS_H_
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#include "ast/ast.h"
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#include "ast/expr_delta_pair.h"
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class used_vars {
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ptr_vector<sort> m_found_vars;
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typedef hashtable<expr_delta_pair, obj_hash<expr_delta_pair>, default_eq<expr_delta_pair> > cache;
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cache m_cache;
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svector<expr_delta_pair> m_todo;
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void process(expr * n, unsigned delta);
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public:
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void operator()(expr * n) {
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m_found_vars.reset();
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process(n, 0);
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}
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void reset() {
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m_found_vars.reset();
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}
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void process(expr * n) {
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process(n, 0);
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}
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unsigned get_max_found_var_idx_plus_1() const { return m_found_vars.size(); }
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sort * get(unsigned var_idx) const { return m_found_vars[var_idx]; }
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sort * contains(unsigned var_idx) const { return var_idx < m_found_vars.size() ? m_found_vars[var_idx] : 0; }
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bool uses_all_vars(unsigned num_decls) const;
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bool uses_a_var(unsigned num_decls) const;
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unsigned get_num_vars() const;
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};
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#endif /* USED_VARS_H_ */
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