1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: libcpp-no-exceptions 11 // <regex> 12 13 // template <class charT, class traits = regex_traits<charT>> class basic_regex; 14 15 // template <class ST, class SA> 16 // basic_regex(const basic_string<charT, ST, SA>& s); 17 18 #include <regex> 19 #include <cassert> 20 #include "test_macros.h" 21 error_badbackref_thrown(const char * pat)22static bool error_badbackref_thrown(const char *pat) 23 { 24 bool result = false; 25 try { 26 std::regex re(pat); 27 } catch (const std::regex_error &ex) { 28 result = (ex.code() == std::regex_constants::error_backref); 29 } 30 return result; 31 } 32 main()33int main() 34 { 35 assert(error_badbackref_thrown("\\1abc")); // no references 36 assert(error_badbackref_thrown("ab(c)\\2def")); // only one reference 37 assert(error_badbackref_thrown("\\800000000000000000000000000000")); // overflows 38 39 // this should NOT throw, because we only should look at the '1' 40 // See https://bugs.llvm.org/show_bug.cgi?id=31387 41 { 42 const char *pat1 = "a(b)c\\1234"; 43 std::regex re(pat1, pat1 + 7); // extra chars after the end. 44 } 45 } 46