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add some notes to regex

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-26 13:22:57 -07:00
parent 9336e823ed
commit 5e79eb62fd
6 changed files with 78 additions and 55 deletions
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9
src/smt/seq_skolem.h
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@ -101,10 +101,11 @@ namespace smt {
r = to_app(a)->get_arg(2), n = to_app(a)->get_arg(3),
true);
}
bool is_accept(expr* a, expr*& s, expr*& i, expr*& r) const {
return is_accept(a) && to_app(a)->get_num_args() == 3 &&
(s = to_app(a)->get_arg(0), i = to_app(a)->get_arg(1),
r = to_app(a)->get_arg(2), true);
bool is_accept(expr* e, expr*& s, expr*& i, unsigned& idx, expr*& r) const {
return is_accept(e) && to_app(e)->get_num_args() == 3 &&
(s = to_app(e)->get_arg(0), i = to_app(e)->get_arg(1),
r = to_app(e)->get_arg(2), true) &&
a.is_unsigned(i, idx);
}
bool is_post(expr* e, expr*& s, expr*& start);
bool is_pre(expr* e, expr*& s, expr*& i);