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seq

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-12-28 10:28:43 -08:00
parent 071a654a9a
commit 739043e273
4 changed files with 213 additions and 157 deletions
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13
src/ast/rewriter/seq_rewriter.cpp
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@ -25,6 +25,14 @@ Notes:
#include"automaton.h"
struct display_expr1 {
ast_manager& m;
display_expr1(ast_manager& m): m(m) {}
std::ostream& display(std::ostream& out, expr* e) const {
return out << mk_pp(e, m);
}
};
re2automaton::re2automaton(ast_manager& m): m(m), u(m) {}
@ -36,6 +44,7 @@ eautomaton* re2automaton::operator()(expr* e) {
return r;
}
eautomaton* re2automaton::re2aut(expr* e) {
SASSERT(u.is_re(e));
expr* e1, *e2;
@ -230,8 +239,8 @@ br_status seq_rewriter::mk_seq_concat(expr* a, expr* b, expr_ref& result) {
result = m_util.str.mk_string(s1 + s2);
return BR_DONE;
}
if (m_util.str.is_concat(b, c, d)) {
result = m_util.str.mk_concat(m_util.str.mk_concat(a, c), d);
if (m_util.str.is_concat(a, c, d)) {
result = m_util.str.mk_concat(c, m_util.str.mk_concat(d, b));
return BR_REWRITE2;
}
if (m_util.str.is_empty(a)) {