From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Tue, 31 Aug 2021 12:43:05 +0000 (-0500)
Subject: Make regular expression sort not closed enumerable (#7092)
X-Git-Tag: cvc5-1.0.0~1316
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1954e0a0bd07ab2236c59bee2bc3da53e2018f23;p=cvc5.git

Make regular expression sort not closed enumerable (#7092)

This ensures we don't try to apply e.g. enumerative instantiation to quantified formulas over regular expressions, since no type enumerator exists for RE.

Fixes #6750.
---

diff --git a/src/expr/type_node.cpp b/src/expr/type_node.cpp
index fa6a56c99..a7747c674 100644
--- a/src/expr/type_node.cpp
+++ b/src/expr/type_node.cpp
@@ -208,7 +208,7 @@ bool TypeNode::isClosedEnumerable()
   if (!getAttribute(IsClosedEnumerableComputedAttr()))
   {
     bool ret = true;
-    if (isArray() || isSort() || isCodatatype() || isFunction())
+    if (isArray() || isSort() || isCodatatype() || isFunction() || isRegExp())
     {
       ret = false;
     }