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add (disabled) stubs for decomposing re-membership on regex

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-05-31 12:25:21 -07:00
parent 7f7663a3b4
commit 084cd335eb
4 changed files with 143 additions and 19 deletions
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2
src/ast/rewriter/seq_rewriter.h
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@ -136,6 +136,8 @@ class seq_rewriter {
// Support for regular expression derivatives
bool get_head_tail(expr* e, expr_ref& head, expr_ref& tail);
bool get_head_tail_reversed(expr* e, expr_ref& head, expr_ref& tail);
bool get_re_head_tail(expr* e, expr_ref& head, expr_ref& tail);
bool get_re_head_tail_reversed(expr* e, expr_ref& head, expr_ref& tail);
expr_ref re_and(expr* cond, expr* r);
expr_ref re_predicate(expr* cond, sort* seq_sort);
expr_ref mk_seq_concat(expr* a, expr* b);