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updated detection of when parenthesis can be omitted to cover empty and epsilon

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This commit is contained in:
Margus Veanes 2020-08-13 17:12:59 -07:00
parent be6f7bb4d7
commit 5b663aad70
1 changed files with 1 additions and 1 deletions
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src/ast/seq_decl_plugin.cpp
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@ -1511,7 +1511,7 @@ void seq_util::re::pp::compact_helper_range(std::ostream& out, expr* s1, expr* s
*/
bool seq_util::re::pp::can_skip_parenth(expr* r) {
expr* s;
return ((re.is_to_re(r, s) && re.u.str.is_unit(s)) || re.is_range(r));
return ((re.is_to_re(r, s) && re.u.str.is_unit(s)) || re.is_range(r) || re.is_empty(r) || re.is_epsilon(r));
}
/*