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string to regex approximation used to strengthen membership constraints (#4610)

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* string to regex approximation used to strengthen membership constraints

* fixed pull request comments
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Margus Veanes 2020-08-01 16:45:00 -07:00 • committed by GitHub
parent fb035c0634
commit 8137143ada
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4 changed files with 98 additions and 3 deletions
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src/ast/seq_decl_plugin.h
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@ -474,6 +474,8 @@ public:
bool is_loop(expr const* n, expr*& body, expr*& lo) const;
unsigned min_length(expr* r) const;
unsigned max_length(expr* r) const;
bool is_epsilon(expr* r) const;
app* mk_epsilon(sort* seq_sort);
};
str str;
re re;