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fix handling of AC operator ++ on regular expressions. Issue #804

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-11-22 13:02:17 -08:00
parent 71ca355257
commit 7a4c20698f
3 changed files with 6 additions and 2 deletions
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3
src/ast/rewriter/seq_rewriter.cpp
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@ -335,6 +335,9 @@ br_status seq_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
SASSERT(num_args == 1);
return mk_re_opt(args[0], result);
case OP_RE_CONCAT:
if (num_args == 1) {
result = args[0]; return BR_DONE;
}
SASSERT(num_args == 2);
return mk_re_concat(args[0], args[1], result);
case OP_RE_UNION: