diff options
Diffstat (limited to 'src/printer/smt2/smt2_printer.cpp')
| -rw-r--r-- | src/printer/smt2/smt2_printer.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/printer/smt2/smt2_printer.cpp b/src/printer/smt2/smt2_printer.cpp index 380004d02..66d36fe4c 100644 --- a/src/printer/smt2/smt2_printer.cpp +++ b/src/printer/smt2/smt2_printer.cpp @@ -91,7 +91,11 @@ void Smt2Printer::toStream( static std::string maybeQuoteSymbol(const std::string& s) { // this is the set of SMT-LIBv2 permitted characters in "simple" (non-quoted) symbols - if(s.find_first_not_of("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~!@$%^&*_-+=<>.?/") != string::npos) { + if (s.find_first_not_of("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789~!@$%^&*_-+=<>.?/") + != string::npos + || s.empty()) + { // need to quote it stringstream ss; ss << '|' << s << '|'; |